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 static SLAP_CTRL_PARSE_FN parseModifyIncrement;
  36 static SLAP_CTRL_PARSE_FN parseNoOp;
  37 static SLAP_CTRL_PARSE_FN parsePagedResults;
  38 #ifdef LDAP_DEVEL
  39 static SLAP_CTRL_PARSE_FN parseSortedResults;
  40 #endif
  41 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  42 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  43 static SLAP_CTRL_PARSE_FN parseDomainScope;
  44 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  45 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  46 static SLAP_CTRL_PARSE_FN parseSubentries;
  47
  48 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  49
  50 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  51 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  52
  53 struct slap_control_ids slap_cids;
  54
  55 struct slap_control {
  56         /* Control OID */
  57         char *sc_oid;
  58
  59         /* The controlID for this control */
  60         int sc_cid;
  61
  62         /* Operations supported by control */
  63         slap_mask_t sc_mask;
  64
  65         /* Extended operations supported by control */
  66         char **sc_extendedops;
  67
  68         /* Control parsing callback */
  69         SLAP_CTRL_PARSE_FN *sc_parse;
  70
  71         LDAP_SLIST_ENTRY(slap_control) sc_next;
  72 };
  73
  74 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  75         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  76
  77 /*
  78  * all known request control OIDs should be added to this list
  79  */
  80 /*
  81  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  82  * addresses an undefined control; this allows to safely test for
  83  * well known controls even if they are not registered, e.g. if
  84  * they get moved to modules.  An example is sc_LDAPsync, which
  85  * is implemented in the syncprov overlay and thus, if configured
  86  * as dynamic module, may not be registered.  One side effect is that
  87  * slap_known_controls[0] == NULL, so it should always be used
  88  * starting from 1.
  89  * FIXME: should we define the "undefined control" oid?
  90  */
  91 char *slap_known_controls[SLAP_MAX_CIDS+1];
  92 static int num_known_controls = 1;
  93
  94 static char *proxy_authz_extops[] = {
  95         LDAP_EXOP_MODIFY_PASSWD,
  96         LDAP_EXOP_X_WHO_AM_I,
  97         NULL
  98 };
  99
 100 static struct slap_control control_defs[] = {
 101         {  LDAP_CONTROL_ASSERT,
 102                 (int)offsetof(struct slap_control_ids, sc_assert),
 103                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 104                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 105         { LDAP_CONTROL_PRE_READ,
 106                 (int)offsetof(struct slap_control_ids, sc_preRead),
 107                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 108                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 109         { LDAP_CONTROL_POST_READ,
 110                 (int)offsetof(struct slap_control_ids, sc_postRead),
 111                 SLAP_CTRL_HIDE|SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 112                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 113         { LDAP_CONTROL_VALUESRETURNFILTER,
 114                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 115                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 116                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 117         { LDAP_CONTROL_PAGEDRESULTS,
 118                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 119                 SLAP_CTRL_SEARCH, NULL,
 120                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 121 #ifdef LDAP_DEVEL
 122         { LDAP_CONTROL_SORTREQUEST,
 123                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 124                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE, NULL,
 125                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 126 #endif
 127 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
 128         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 129                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 130                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 131                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 132 #endif
 133 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 134         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 135                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 136                 SLAP_CTRL_MODIFY, NULL,
 137                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 138 #endif
 139 #ifdef SLAP_CONTROL_X_TREE_DELETE
 140         { LDAP_CONTROL_X_TREE_DELETE,
 141                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 142                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE, NULL,
 143                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 144 #endif
 145 #ifdef LDAP_CONTROL_X_SEARCH_OPTIONS
 146         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 147                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 148                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 149                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 150 #endif
 151 #ifdef LDAP_CONTROL_SUBENTRIES
 152         { LDAP_CONTROL_SUBENTRIES,
 153                 (int)offsetof(struct slap_control_ids, sc_subentries),
 154                 SLAP_CTRL_SEARCH, NULL,
 155                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 156 #endif
 157         { LDAP_CONTROL_NOOP,
 158                 (int)offsetof(struct slap_control_ids, sc_noOp),
 159                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 160                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 161 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
 162         { LDAP_CONTROL_MODIFY_INCREMENT,
 163                 (int)offsetof(struct slap_control_ids, sc_modifyIncrement),
 164                 SLAP_CTRL_HIDE|SLAP_CTRL_MODIFY, NULL,
 165                 parseModifyIncrement, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 166 #endif
 167 #ifdef LDAP_DEVEL
 168         { LDAP_CONTROL_MANAGEDIT,
 169                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 170                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE, NULL,
 171                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 172 #endif
 173         { LDAP_CONTROL_MANAGEDSAIT,
 174                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 175                 SLAP_CTRL_ACCESS, NULL,
 176                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 177         { LDAP_CONTROL_PROXY_AUTHZ,
 178                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 179                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS, proxy_authz_extops,
 180                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 181         { NULL, 0, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 182 };
 183
 184 /*
 185  * Register a supported control.
 186  *
 187  * This can be called by an OpenLDAP plugin or, indirectly, by a
 188  * SLAPI plugin calling slapi_register_supported_control().
 189  */
 190 int
 191 register_supported_control(const char *controloid,
 192         slap_mask_t controlmask,
 193         char **controlexops,
 194         SLAP_CTRL_PARSE_FN *controlparsefn,
 195         int *controlcid)
 196 {
 197         struct slap_control *sc;
 198         int i;
 199
 200         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 201                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 202                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 203                 SLAP_MAX_CIDS, 0, 0 );
 204                 return LDAP_OTHER;
 205         }
 206
 207         if ( controloid == NULL ) return LDAP_PARAM_ERROR;
 208
 209         /* sanity check - should never happen */
 210         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 211                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 212                         Debug( LDAP_DEBUG_ANY,
 213                                 "Control %s already registered.\n",
 214                                 controloid, 0, 0 );
 215                         return LDAP_PARAM_ERROR;
 216                 }
 217         }
 218
 219         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 220         if ( sc == NULL ) return LDAP_NO_MEMORY;
 221
 222         sc->sc_oid = ch_strdup( controloid );
 223         sc->sc_mask = controlmask;
 224         if ( controlexops != NULL ) {
 225                 sc->sc_extendedops = ldap_charray_dup( controlexops );
 226                 if ( sc->sc_extendedops == NULL ) {
 227                         ch_free( sc );
 228                         return LDAP_NO_MEMORY;
 229                 }
 230         } else {
 231                 sc->sc_extendedops = NULL;
 232         }
 233         sc->sc_parse = controlparsefn;
 234
 235         if ( controlcid ) *controlcid = num_known_controls;
 236         sc->sc_cid = num_known_controls;
 237
 238         /* Update slap_known_controls, too. */
 239         slap_known_controls[num_known_controls-1] = sc->sc_oid;
 240         slap_known_controls[num_known_controls++] = NULL;
 241
 242         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 243         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 244         return LDAP_SUCCESS;
 245 }
 246
 247 /*
 248  * One-time initialization of internal controls.
 249  */
 250 int
 251 slap_controls_init( void )
 252 {
 253         int i, rc;
 254         struct slap_control *sc;
 255
 256         rc = LDAP_SUCCESS;
 257
 258         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 259                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 260                 rc = register_supported_control( control_defs[i].sc_oid,
 261                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 262                         control_defs[i].sc_parse, cid );
 263                 if ( rc != LDAP_SUCCESS ) break;
 264         }
 265
 266         return rc;
 267 }
 268
 269 /*
 270  * Free memory associated with list of supported controls.
 271  */
 272 void
 273 controls_destroy( void )
 274 {
 275         struct slap_control *sc;
 276
 277         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 278                 sc = LDAP_SLIST_FIRST(&controls_list);
 279                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 280
 281                 ch_free( sc->sc_oid );
 282                 if ( sc->sc_extendedops != NULL ) {
 283                         ldap_charray_free( sc->sc_extendedops );
 284                 }
 285                 ch_free( sc );
 286         }
 287 }
 288
 289 /*
 290  * Format the supportedControl attribute of the root DSE,
 291  * detailing which controls are supported by the directory
 292  * server.
 293  */
 294 int
 295 controls_root_dse_info( Entry *e )
 296 {
 297         AttributeDescription *ad_supportedControl
 298                 = slap_schema.si_ad_supportedControl;
 299         struct berval vals[2];
 300         struct slap_control *sc;
 301
 302         vals[1].bv_val = NULL;
 303         vals[1].bv_len = 0;
 304
 305         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 306                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 307
 308                 vals[0].bv_val = sc->sc_oid;
 309                 vals[0].bv_len = strlen( sc->sc_oid );
 310
 311                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 312                         return -1;
 313                 }
 314         }
 315
 316         return 0;
 317 }
 318
 319 /*
 320  * Return a list of OIDs and operation masks for supported
 321  * controls. Used by SLAPI.
 322  */
 323 int
 324 get_supported_controls(char ***ctrloidsp,
 325         slap_mask_t **ctrlmasks)
 326 {
 327         int i, n;
 328         char **oids;
 329         slap_mask_t *masks;
 330         int rc;
 331         struct slap_control *sc;
 332
 333         n = 0;
 334
 335         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 336                 n++;
 337         }
 338
 339         if ( n == 0 ) {
 340                 *ctrloidsp = NULL;
 341                 *ctrlmasks = NULL;
 342                 return LDAP_SUCCESS;
 343         }
 344
 345         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 346         if ( oids == NULL ) {
 347                 return LDAP_NO_MEMORY;
 348         }
 349         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 350         if  ( masks == NULL ) {
 351                 ch_free( oids );
 352                 return LDAP_NO_MEMORY;
 353         }
 354
 355         n = 0;
 356
 357         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 358                 oids[n] = ch_strdup( sc->sc_oid );
 359                 masks[n] = sc->sc_mask;
 360                 n++;
 361         }
 362         oids[n] = NULL;
 363         masks[n] = 0;
 364
 365         *ctrloidsp = oids;
 366         *ctrlmasks = masks;
 367
 368         return LDAP_SUCCESS;
 369 }
 370
 371 /*
 372  * Find a control given its OID.
 373  */
 374 static struct slap_control *
 375 find_ctrl( const char *oid )
 376 {
 377         struct slap_control *sc;
 378
 379         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 380                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 381                         return sc;
 382                 }
 383         }
 384
 385         return NULL;
 386 }
 387
 388 int
 389 slap_find_control_id(
 390         const char *oid,
 391         int *cid )
 392 {
 393         struct slap_control *ctrl = find_ctrl( oid );
 394         if ( ctrl ) {
 395                 if ( cid ) *cid = ctrl->sc_cid;
 396                 return LDAP_SUCCESS;
 397         }
 398         return LDAP_CONTROL_NOT_FOUND;
 399 }
 400
 401 int
 402 slap_global_control( Operation *op, const char *oid, int *cid )
 403 {
 404         struct slap_control *ctrl = find_ctrl( oid );
 405
 406         if ( ctrl == NULL ) {
 407                 /* should not be reachable */
 408                 Debug( LDAP_DEBUG_ANY,
 409                         "slap_global_control: unrecognized control: %s\n",
 410                         oid, 0, 0 );
 411                 return LDAP_CONTROL_NOT_FOUND;
 412         }
 413
 414         if ( cid ) *cid = ctrl->sc_cid;
 415
 416         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 417                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 418                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 419         {
 420                 return LDAP_COMPARE_TRUE;
 421         }
 422
 423         Debug( LDAP_DEBUG_TRACE,
 424                 "slap_global_control: unavailable control: %s\n",
 425                 oid, 0, 0 );
 426
 427         return LDAP_COMPARE_FALSE;
 428 }
 429
 430 void slap_free_ctrls(
 431         Operation *op,
 432         LDAPControl **ctrls )
 433 {
 434         int i;
 435
 436         for (i=0; ctrls[i]; i++) {
 437                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 438         }
 439         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 440 }
 441
 442 int get_ctrls(
 443         Operation *op,
 444         SlapReply *rs,
 445         int sendres )
 446 {
 447         int nctrls = 0;
 448         ber_tag_t tag;
 449         ber_len_t len;
 450         char *opaque;
 451         BerElement *ber = op->o_ber;
 452         struct slap_control *sc;
 453         struct berval bv;
 454
 455         len = ber_pvt_ber_remaining(ber);
 456
 457         if( len == 0) {
 458                 /* no controls */
 459                 rs->sr_err = LDAP_SUCCESS;
 460                 return rs->sr_err;
 461         }
 462
 463         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 464                 if( tag == LBER_ERROR ) {
 465                         rs->sr_err = SLAPD_DISCONNECT;
 466                         rs->sr_text = "unexpected data in PDU";
 467                 }
 468
 469                 goto return_results;
 470         }
 471
 472         Debug( LDAP_DEBUG_TRACE,
 473                 "=> get_ctrls\n", 0, 0, 0 );
 474
 475         if( op->o_protocol < LDAP_VERSION3 ) {
 476                 rs->sr_err = SLAPD_DISCONNECT;
 477                 rs->sr_text = "controls require LDAPv3";
 478                 goto return_results;
 479         }
 480
 481         /* one for first control, one for termination */
 482         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 483
 484 #if 0
 485         if( op->ctrls == NULL ) {
 486                 rs->sr_err = LDAP_NO_MEMORY;
 487                 rs->sr_text = "no memory";
 488                 goto return_results;
 489         }
 490 #endif
 491
 492         op->o_ctrls[nctrls] = NULL;
 493
 494         /* step through each element */
 495         for( tag = ber_first_element( ber, &len, &opaque );
 496                 tag != LBER_ERROR;
 497                 tag = ber_next_element( ber, &len, opaque ) )
 498         {
 499                 LDAPControl *c;
 500                 LDAPControl **tctrls;
 501
 502                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 503                 memset(c, 0, sizeof(LDAPControl));
 504
 505                 /* allocate pointer space for current controls (nctrls)
 506                  * + this control + extra NULL
 507                  */
 508                 tctrls = op->o_tmprealloc( op->o_ctrls,
 509                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 510
 511 #if 0
 512                 if( tctrls == NULL ) {
 513                         ch_free( c );
 514                         ldap_controls_free(op->o_ctrls);
 515                         op->o_ctrls = NULL;
 516
 517                         rs->sr_err = LDAP_NO_MEMORY;
 518                         rs->sr_text = "no memory";
 519                         goto return_results;
 520                 }
 521 #endif
 522                 op->o_ctrls = tctrls;
 523
 524                 op->o_ctrls[nctrls++] = c;
 525                 op->o_ctrls[nctrls] = NULL;
 526
 527                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 528                 c->ldctl_oid = bv.bv_val;
 529
 530                 if( tag == LBER_ERROR ) {
 531                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 532                                 0, 0, 0 );
 533
 534                         slap_free_ctrls( op, op->o_ctrls );
 535                         op->o_ctrls = NULL;
 536                         rs->sr_err = SLAPD_DISCONNECT;
 537                         rs->sr_text = "decoding controls error";
 538                         goto return_results;
 539
 540                 } else if( c->ldctl_oid == NULL ) {
 541                         Debug( LDAP_DEBUG_TRACE,
 542                                 "get_ctrls: conn %lu got emtpy OID.\n",
 543                                 op->o_connid, 0, 0 );
 544
 545                         slap_free_ctrls( op, op->o_ctrls );
 546                         op->o_ctrls = NULL;
 547                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 548                         rs->sr_text = "OID field is empty";
 549                         goto return_results;
 550                 }
 551
 552                 tag = ber_peek_tag( ber, &len );
 553
 554                 if( tag == LBER_BOOLEAN ) {
 555                         ber_int_t crit;
 556                         tag = ber_scanf( ber, "b", &crit );
 557
 558                         if( tag == LBER_ERROR ) {
 559                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 560                                         0, 0, 0 );
 561                                 slap_free_ctrls( op, op->o_ctrls );
 562                                 op->o_ctrls = NULL;
 563                                 rs->sr_err = SLAPD_DISCONNECT;
 564                                 rs->sr_text = "decoding controls error";
 565                                 goto return_results;
 566                         }
 567
 568                         c->ldctl_iscritical = (crit != 0);
 569                         tag = ber_peek_tag( ber, &len );
 570                 }
 571
 572                 if( tag == LBER_OCTETSTRING ) {
 573                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 574
 575                         if( tag == LBER_ERROR ) {
 576                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 577                                         "%s (%scritical): get value failed.\n",
 578                                         op->o_connid, c->ldctl_oid,
 579                                         c->ldctl_iscritical ? "" : "non" );
 580                                 slap_free_ctrls( op, op->o_ctrls );
 581                                 op->o_ctrls = NULL;
 582                                 rs->sr_err = SLAPD_DISCONNECT;
 583                                 rs->sr_text = "decoding controls error";
 584                                 goto return_results;
 585                         }
 586                 }
 587
 588                 Debug( LDAP_DEBUG_TRACE,
 589                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 590                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 591
 592                 sc = find_ctrl( c->ldctl_oid );
 593                 if( sc != NULL ) {
 594                         /* recognized control */
 595                         slap_mask_t tagmask;
 596                         switch( op->o_tag ) {
 597                         case LDAP_REQ_ADD:
 598                                 tagmask = SLAP_CTRL_ADD;
 599                                 break;
 600                         case LDAP_REQ_BIND:
 601                                 tagmask = SLAP_CTRL_BIND;
 602                                 break;
 603                         case LDAP_REQ_COMPARE:
 604                                 tagmask = SLAP_CTRL_COMPARE;
 605                                 break;
 606                         case LDAP_REQ_DELETE:
 607                                 tagmask = SLAP_CTRL_DELETE;
 608                                 break;
 609                         case LDAP_REQ_MODIFY:
 610                                 tagmask = SLAP_CTRL_MODIFY;
 611                                 break;
 612                         case LDAP_REQ_RENAME:
 613                                 tagmask = SLAP_CTRL_RENAME;
 614                                 break;
 615                         case LDAP_REQ_SEARCH:
 616                                 tagmask = SLAP_CTRL_SEARCH;
 617                                 break;
 618                         case LDAP_REQ_UNBIND:
 619                                 tagmask = SLAP_CTRL_UNBIND;
 620                                 break;
 621                         case LDAP_REQ_ABANDON:
 622                                 tagmask = SLAP_CTRL_ABANDON;
 623                                 break;
 624                         case LDAP_REQ_EXTENDED:
 625                                 tagmask=~0L;
 626                                 assert( op->ore_reqoid.bv_val != NULL );
 627                                 if( sc->sc_extendedops != NULL ) {
 628                                         int i;
 629                                         for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 630                                                 if( strcmp( op->ore_reqoid.bv_val,
 631                                                         sc->sc_extendedops[i] ) == 0 )
 632                                                 {
 633                                                         tagmask=0L;
 634                                                         break;
 635                                                 }
 636                                         }
 637                                 }
 638                                 break;
 639                         default:
 640                                 rs->sr_err = LDAP_OTHER;
 641                                 rs->sr_text = "controls internal error";
 642                                 goto return_results;
 643                         }
 644
 645                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 646                                 /* available extension */
 647                                 int     rc;
 648
 649                                 if( !sc->sc_parse ) {
 650                                         rs->sr_err = LDAP_OTHER;
 651                                         rs->sr_text = "not yet implemented";
 652                                         goto return_results;
 653                                 }
 654
 655                                 rc = sc->sc_parse( op, rs, c );
 656                                 if ( rc ) {
 657                                         assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 658                                         rs->sr_err = rc;
 659                                         goto return_results;
 660                                 }
 661
 662                         } else if( c->ldctl_iscritical ) {
 663                                 /* unavailable CRITICAL control */
 664                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 665                                 rs->sr_text = "critical extension is unavailable";
 666                                 goto return_results;
 667                         }
 668
 669                 } else if( c->ldctl_iscritical ) {
 670                         /* unrecognized CRITICAL control */
 671                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 672                         rs->sr_text = "critical extension is not recognized";
 673                         goto return_results;
 674                 }
 675 next_ctrl:;
 676         }
 677
 678 return_results:
 679         Debug( LDAP_DEBUG_TRACE,
 680                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 681                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 682
 683         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 684                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 685                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 686                         send_ldap_disconnect( op, rs );
 687                         rs->sr_err = SLAPD_DISCONNECT;
 688                 } else {
 689                         send_ldap_result( op, rs );
 690                 }
 691         }
 692
 693         return rs->sr_err;
 694 }
 695
 696 static int parseModifyIncrement (
 697         Operation *op,
 698         SlapReply *rs,
 699         LDAPControl *ctrl )
 700 {
 701 #if 0
 702         if ( op->o_modifyIncrement != SLAP_CONTROL_NONE ) {
 703                 rs->sr_text = "modifyIncrement control specified multiple times";
 704                 return LDAP_PROTOCOL_ERROR;
 705         }
 706 #endif
 707
 708         if ( ctrl->ldctl_value.bv_len ) {
 709                 rs->sr_text = "modifyIncrement control value not empty";
 710                 return LDAP_PROTOCOL_ERROR;
 711         }
 712
 713 #if 0
 714         op->o_modifyIncrement = ctrl->ldctl_iscritical
 715                 ? SLAP_CONTROL_CRITICAL
 716                 : SLAP_CONTROL_NONCRITICAL;
 717 #endif
 718
 719         return LDAP_SUCCESS;
 720 }
 721
 722 #ifdef LDAP_DEVEL
 723 static int parseManageDIT (
 724         Operation *op,
 725         SlapReply *rs,
 726         LDAPControl *ctrl )
 727 {
 728         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 729                 rs->sr_text = "manageDIT control specified multiple times";
 730                 return LDAP_PROTOCOL_ERROR;
 731         }
 732
 733         if ( ctrl->ldctl_value.bv_len ) {
 734                 rs->sr_text = "manageDIT control value not empty";
 735                 return LDAP_PROTOCOL_ERROR;
 736         }
 737
 738         op->o_managedit = ctrl->ldctl_iscritical
 739                 ? SLAP_CONTROL_CRITICAL
 740                 : SLAP_CONTROL_NONCRITICAL;
 741
 742         return LDAP_SUCCESS;
 743 }
 744 #endif
 745
 746 static int parseManageDSAit (
 747         Operation *op,
 748         SlapReply *rs,
 749         LDAPControl *ctrl )
 750 {
 751         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 752                 rs->sr_text = "manageDSAit control specified multiple times";
 753                 return LDAP_PROTOCOL_ERROR;
 754         }
 755
 756         if ( ctrl->ldctl_value.bv_len ) {
 757                 rs->sr_text = "manageDSAit control value not empty";
 758                 return LDAP_PROTOCOL_ERROR;
 759         }
 760
 761         op->o_managedsait = ctrl->ldctl_iscritical
 762                 ? SLAP_CONTROL_CRITICAL
 763                 : SLAP_CONTROL_NONCRITICAL;
 764
 765         return LDAP_SUCCESS;
 766 }
 767
 768 static int parseProxyAuthz (
 769         Operation *op,
 770         SlapReply *rs,
 771         LDAPControl *ctrl )
 772 {
 773         int             rc;
 774         struct berval   dn = BER_BVNULL;
 775
 776         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 777                 rs->sr_text = "proxy authorization control specified multiple times";
 778                 return LDAP_PROTOCOL_ERROR;
 779         }
 780
 781         op->o_proxy_authz = ctrl->ldctl_iscritical
 782                 ? SLAP_CONTROL_CRITICAL
 783                 : SLAP_CONTROL_NONCRITICAL;
 784
 785         Debug( LDAP_DEBUG_ARGS,
 786                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 787                 op->o_connid,
 788                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 789                 0 );
 790
 791         if ( ctrl->ldctl_value.bv_len == 0 ) {
 792                 Debug( LDAP_DEBUG_TRACE,
 793                         "parseProxyAuthz: conn=%lu anonymous\n",
 794                         op->o_connid, 0, 0 );
 795
 796                 /* anonymous */
 797                 op->o_ndn.bv_val[ 0 ] = '\0';
 798                 op->o_ndn.bv_len = 0;
 799
 800                 op->o_dn.bv_val[ 0 ] = '\0';
 801                 op->o_dn.bv_len = 0;
 802
 803                 return LDAP_SUCCESS;
 804         }
 805
 806         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 807                         NULL, &dn, SLAP_GETDN_AUTHZID );
 808
 809         /* FIXME: empty DN in proxyAuthz control should be legal... */
 810         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 811                 if ( dn.bv_val ) {
 812                         ch_free( dn.bv_val );
 813                 }
 814                 rs->sr_text = "authzId mapping failed";
 815                 return LDAP_PROXY_AUTHZ_FAILURE;
 816         }
 817
 818         Debug( LDAP_DEBUG_TRACE,
 819                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 820                 op->o_connid,
 821                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 822
 823         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 824
 825         if ( rc ) {
 826                 ch_free( dn.bv_val );
 827                 rs->sr_text = "not authorized to assume identity";
 828                 return LDAP_PROXY_AUTHZ_FAILURE;
 829         }
 830
 831         ch_free( op->o_ndn.bv_val );
 832         ch_free( op->o_dn.bv_val );
 833
 834         /*
 835          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 836          * from now on op->o_dn is normalized
 837          */
 838         op->o_ndn = dn;
 839         ber_dupbv( &op->o_dn, &dn );
 840
 841
 842         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 843             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 844
 845         return LDAP_SUCCESS;
 846 }
 847
 848 static int parseNoOp (
 849         Operation *op,
 850         SlapReply *rs,
 851         LDAPControl *ctrl )
 852 {
 853         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 854                 rs->sr_text = "noop control specified multiple times";
 855                 return LDAP_PROTOCOL_ERROR;
 856         }
 857
 858         if ( ctrl->ldctl_value.bv_len ) {
 859                 rs->sr_text = "noop control value not empty";
 860                 return LDAP_PROTOCOL_ERROR;
 861         }
 862
 863         op->o_noop = ctrl->ldctl_iscritical
 864                 ? SLAP_CONTROL_CRITICAL
 865                 : SLAP_CONTROL_NONCRITICAL;
 866
 867         return LDAP_SUCCESS;
 868 }
 869
 870 static int parsePagedResults (
 871         Operation *op,
 872         SlapReply *rs,
 873         LDAPControl *ctrl )
 874 {
 875         int             rc = LDAP_SUCCESS;
 876         ber_tag_t       tag;
 877         ber_int_t       size;
 878         BerElement      *ber;
 879         struct berval   cookie = BER_BVNULL;
 880         PagedResultsState       *ps;
 881
 882         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
 883                 rs->sr_text = "paged results control specified multiple times";
 884                 return LDAP_PROTOCOL_ERROR;
 885         }
 886
 887         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 888                 rs->sr_text = "paged results control value is empty (or absent)";
 889                 return LDAP_PROTOCOL_ERROR;
 890         }
 891
 892         /* Parse the control value
 893          *      realSearchControlValue ::= SEQUENCE {
 894          *              size    INTEGER (0..maxInt),
 895          *                              -- requested page size from client
 896          *                              -- result set size estimate from server
 897          *              cookie  OCTET STRING
 898          * }
 899          */
 900         ber = ber_init( &ctrl->ldctl_value );
 901         if ( ber == NULL ) {
 902                 rs->sr_text = "internal error";
 903                 return LDAP_OTHER;
 904         }
 905
 906         tag = ber_scanf( ber, "{im}", &size, &cookie );
 907
 908         if ( tag == LBER_ERROR ) {
 909                 rs->sr_text = "paged results control could not be decoded";
 910                 rc = LDAP_PROTOCOL_ERROR;
 911                 goto done;
 912         }
 913
 914         if ( size < 0 ) {
 915                 rs->sr_text = "paged results control size invalid";
 916                 rc = LDAP_PROTOCOL_ERROR;
 917                 goto done;
 918         }
 919
 920 #if 0
 921         /* defer cookie decoding/checks to backend... */
 922         if ( cookie.bv_len ) {
 923                 PagedResultsCookie reqcookie;
 924                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 925                         /* bad cookie */
 926                         rs->sr_text = "paged results cookie is invalid";
 927                         rc = LDAP_PROTOCOL_ERROR;
 928                         goto done;
 929                 }
 930
 931                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 932
 933                 if ( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 934                         /* bad cookie */
 935                         rs->sr_text = "paged results cookie is invalid";
 936                         rc = LDAP_PROTOCOL_ERROR;
 937                         goto done;
 938
 939                 } else if ( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 940                         rs->sr_text = "paged results cookie is invalid or old";
 941                         rc = LDAP_UNWILLING_TO_PERFORM;
 942                         goto done;
 943                 }
 944
 945         } else {
 946                 /* Initial request.  Initialize state. */
 947 #if 0
 948                 if ( op->o_conn->c_pagedresults_state.ps_cookie != 0 ) {
 949                         /* There's another pagedResults control on the
 950                          * same connection; reject new pagedResults controls
 951                          * (allowed by RFC2696) */
 952                         rs->sr_text = "paged results cookie unavailable; try later";
 953                         rc = LDAP_UNWILLING_TO_PERFORM;
 954                         goto done;
 955                 }
 956 #endif
 957                 op->o_pagedresults_state.ps_cookie = 0;
 958                 op->o_pagedresults_state.ps_count = 0;
 959         }
 960 #endif
 961
 962         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
 963         *ps = op->o_conn->c_pagedresults_state;
 964         ps->ps_size = size;
 965         op->o_pagedresults_state = ps;
 966
 967         /* NOTE: according to RFC 2696 3.:
 968
 969     If the page size is greater than or equal to the sizeLimit value, the
 970     server should ignore the control as the request can be satisfied in a
 971     single page.
 972
 973          * NOTE: this assumes that the op->ors_slimit be set
 974          * before the controls are parsed.
 975          */
 976
 977         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
 978                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
 979
 980         } else if ( ctrl->ldctl_iscritical ) {
 981                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
 982
 983         } else {
 984                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
 985         }
 986
 987 done:;
 988         (void)ber_free( ber, 1 );
 989         return rc;
 990 }
 991
 992 #ifdef LDAP_DEVEL
 993 static int parseSortedResults (
 994         Operation *op,
 995         SlapReply *rs,
 996         LDAPControl *ctrl )
 997 {
 998         int             rc = LDAP_SUCCESS;
 999
1000         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1001                 rs->sr_text = "sorted results control specified multiple times";
1002                 return LDAP_PROTOCOL_ERROR;
1003         }
1004
1005         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1006                 rs->sr_text = "sorted results control value is empty (or absent)";
1007                 return LDAP_PROTOCOL_ERROR;
1008         }
1009
1010         /* blow off parsing the value */
1011
1012         op->o_sortedresults = ctrl->ldctl_iscritical
1013                 ? SLAP_CONTROL_CRITICAL
1014                 : SLAP_CONTROL_NONCRITICAL;
1015
1016         return rc;
1017 }
1018 #endif
1019
1020 static int parseAssert (
1021         Operation *op,
1022         SlapReply *rs,
1023         LDAPControl *ctrl )
1024 {
1025         BerElement      *ber;
1026         struct berval   fstr = BER_BVNULL;
1027         const char *err_msg = "";
1028
1029         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1030                 rs->sr_text = "assert control specified multiple times";
1031                 return LDAP_PROTOCOL_ERROR;
1032         }
1033
1034         if ( ctrl->ldctl_value.bv_len == 0 ) {
1035                 rs->sr_text = "assert control value is empty (or absent)";
1036                 return LDAP_PROTOCOL_ERROR;
1037         }
1038
1039         ber = ber_init( &(ctrl->ldctl_value) );
1040         if (ber == NULL) {
1041                 rs->sr_text = "assert control: internal error";
1042                 return LDAP_OTHER;
1043         }
1044
1045         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion), &rs->sr_text);
1046
1047         if( rs->sr_err != LDAP_SUCCESS ) {
1048                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1049                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1050                         send_ldap_disconnect( op, rs );
1051                         rs->sr_err = SLAPD_DISCONNECT;
1052                 } else {
1053                         send_ldap_result( op, rs );
1054                 }
1055                 if( op->o_assertion != NULL ) {
1056                         filter_free_x( op, op->o_assertion );
1057                 }
1058                 return rs->sr_err;
1059         }
1060
1061 #ifdef LDAP_DEBUG
1062         filter2bv_x( op, op->o_assertion, &fstr );
1063
1064         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1065                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1066         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1067 #endif
1068
1069         op->o_assert = ctrl->ldctl_iscritical
1070                 ? SLAP_CONTROL_CRITICAL
1071                 : SLAP_CONTROL_NONCRITICAL;
1072
1073         rs->sr_err = LDAP_SUCCESS;
1074         return LDAP_SUCCESS;
1075 }
1076
1077 static int parsePreRead (
1078         Operation *op,
1079         SlapReply *rs,
1080         LDAPControl *ctrl )
1081 {
1082         ber_len_t siz, off, i;
1083         AttributeName *an = NULL;
1084         BerElement      *ber;
1085
1086         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1087                 rs->sr_text = "preread control specified multiple times";
1088                 return LDAP_PROTOCOL_ERROR;
1089         }
1090
1091         if ( ctrl->ldctl_value.bv_len == 0 ) {
1092                 rs->sr_text = "preread control value is empty (or absent)";
1093                 return LDAP_PROTOCOL_ERROR;
1094         }
1095
1096         ber = ber_init( &(ctrl->ldctl_value) );
1097         if (ber == NULL) {
1098                 rs->sr_text = "preread control: internal error";
1099                 return LDAP_OTHER;
1100         }
1101
1102         siz = sizeof( AttributeName );
1103         off = offsetof( AttributeName, an_name );
1104         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1105                 rs->sr_text = "preread control: decoding error";
1106                 return LDAP_PROTOCOL_ERROR;
1107         }
1108
1109         for( i=0; i<siz; i++ ) {
1110                 int             rc = LDAP_SUCCESS;
1111                 const char      *dummy = NULL;
1112
1113                 an[i].an_desc = NULL;
1114                 an[i].an_oc = NULL;
1115                 an[i].an_oc_exclude = 0;
1116                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1117                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1118                         rs->sr_text = dummy
1119                                 ? dummy
1120                                 : "postread control: unknown attributeType";
1121                         return rc;
1122                 }
1123         }
1124
1125         op->o_preread = ctrl->ldctl_iscritical
1126                 ? SLAP_CONTROL_CRITICAL
1127                 : SLAP_CONTROL_NONCRITICAL;
1128
1129         op->o_preread_attrs = an;
1130
1131         rs->sr_err = LDAP_SUCCESS;
1132         return LDAP_SUCCESS;
1133 }
1134
1135 static int parsePostRead (
1136         Operation *op,
1137         SlapReply *rs,
1138         LDAPControl *ctrl )
1139 {
1140         ber_len_t siz, off, i;
1141         AttributeName *an = NULL;
1142         BerElement      *ber;
1143
1144         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1145                 rs->sr_text = "postread control specified multiple times";
1146                 return LDAP_PROTOCOL_ERROR;
1147         }
1148
1149         if ( ctrl->ldctl_value.bv_len == 0 ) {
1150                 rs->sr_text = "postread control value is empty (or absent)";
1151                 return LDAP_PROTOCOL_ERROR;
1152         }
1153
1154         ber = ber_init( &(ctrl->ldctl_value) );
1155         if (ber == NULL) {
1156                 rs->sr_text = "postread control: internal error";
1157                 return LDAP_OTHER;
1158         }
1159
1160         siz = sizeof( AttributeName );
1161         off = offsetof( AttributeName, an_name );
1162         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1163                 rs->sr_text = "postread control: decoding error";
1164                 return LDAP_PROTOCOL_ERROR;
1165         }
1166
1167         for( i=0; i<siz; i++ ) {
1168                 int             rc = LDAP_SUCCESS;
1169                 const char      *dummy = NULL;
1170
1171                 an[i].an_desc = NULL;
1172                 an[i].an_oc = NULL;
1173                 an[i].an_oc_exclude = 0;
1174                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1175                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1176                         rs->sr_text = dummy
1177                                 ? dummy
1178                                 : "postread control: unknown attributeType";
1179                         return rc;
1180                 }
1181         }
1182
1183         op->o_postread = ctrl->ldctl_iscritical
1184                 ? SLAP_CONTROL_CRITICAL
1185                 : SLAP_CONTROL_NONCRITICAL;
1186
1187         op->o_postread_attrs = an;
1188
1189         rs->sr_err = LDAP_SUCCESS;
1190         return LDAP_SUCCESS;
1191 }
1192
1193 int parseValuesReturnFilter (
1194         Operation *op,
1195         SlapReply *rs,
1196         LDAPControl *ctrl )
1197 {
1198         BerElement      *ber;
1199         struct berval   fstr = BER_BVNULL;
1200         const char *err_msg = "";
1201
1202         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1203                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1204                 return LDAP_PROTOCOL_ERROR;
1205         }
1206
1207         if ( ctrl->ldctl_value.bv_len == 0 ) {
1208                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1209                 return LDAP_PROTOCOL_ERROR;
1210         }
1211
1212         ber = ber_init( &(ctrl->ldctl_value) );
1213         if (ber == NULL) {
1214                 rs->sr_text = "internal error";
1215                 return LDAP_OTHER;
1216         }
1217
1218         rs->sr_err = get_vrFilter( op, ber, (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1219
1220         if( rs->sr_err != LDAP_SUCCESS ) {
1221                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1222                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1223                         send_ldap_disconnect( op, rs );
1224                         rs->sr_err = SLAPD_DISCONNECT;
1225                 } else {
1226                         send_ldap_result( op, rs );
1227                 }
1228                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1229         }
1230 #ifdef LDAP_DEBUG
1231         else {
1232                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1233         }
1234
1235         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1236                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1237         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1238 #endif
1239
1240         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1241                 ? SLAP_CONTROL_CRITICAL
1242                 : SLAP_CONTROL_NONCRITICAL;
1243
1244         rs->sr_err = LDAP_SUCCESS;
1245         return LDAP_SUCCESS;
1246 }
1247
1248 #ifdef LDAP_CONTROL_SUBENTRIES
1249 static int parseSubentries (
1250         Operation *op,
1251         SlapReply *rs,
1252         LDAPControl *ctrl )
1253 {
1254         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1255                 rs->sr_text = "subentries control specified multiple times";
1256                 return LDAP_PROTOCOL_ERROR;
1257         }
1258
1259         /* FIXME: should use BER library */
1260         if( ( ctrl->ldctl_value.bv_len != 3 )
1261                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1262                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1263         {
1264                 rs->sr_text = "subentries control value encoding is bogus";
1265                 return LDAP_PROTOCOL_ERROR;
1266         }
1267
1268         op->o_subentries = ctrl->ldctl_iscritical
1269                 ? SLAP_CONTROL_CRITICAL
1270                 : SLAP_CONTROL_NONCRITICAL;
1271
1272         if (ctrl->ldctl_value.bv_val[2]) {
1273                 set_subentries_visibility( op );
1274         }
1275
1276         return LDAP_SUCCESS;
1277 }
1278 #endif
1279
1280 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1281 static int parsePermissiveModify (
1282         Operation *op,
1283         SlapReply *rs,
1284         LDAPControl *ctrl )
1285 {
1286         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1287                 rs->sr_text = "permissiveModify control specified multiple times";
1288                 return LDAP_PROTOCOL_ERROR;
1289         }
1290
1291         if ( ctrl->ldctl_value.bv_len ) {
1292                 rs->sr_text = "permissiveModify control value not empty";
1293                 return LDAP_PROTOCOL_ERROR;
1294         }
1295
1296         op->o_permissive_modify = ctrl->ldctl_iscritical
1297                 ? SLAP_CONTROL_CRITICAL
1298                 : SLAP_CONTROL_NONCRITICAL;
1299
1300         return LDAP_SUCCESS;
1301 }
1302 #endif
1303
1304 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1305 static int parseDomainScope (
1306         Operation *op,
1307         SlapReply *rs,
1308         LDAPControl *ctrl )
1309 {
1310         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1311                 rs->sr_text = "domainScope control specified multiple times";
1312                 return LDAP_PROTOCOL_ERROR;
1313         }
1314
1315         if ( ctrl->ldctl_value.bv_len ) {
1316                 rs->sr_text = "domainScope control value not empty";
1317                 return LDAP_PROTOCOL_ERROR;
1318         }
1319
1320         op->o_domain_scope = ctrl->ldctl_iscritical
1321                 ? SLAP_CONTROL_CRITICAL
1322                 : SLAP_CONTROL_NONCRITICAL;
1323
1324         return LDAP_SUCCESS;
1325 }
1326 #endif
1327
1328 #ifdef LDAP_CONTROL_X_TREE_DELETE
1329 static int parseTreeDelete (
1330         Operation *op,
1331         SlapReply *rs,
1332         LDAPControl *ctrl )
1333 {
1334         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1335                 rs->sr_text = "treeDelete control specified multiple times";
1336                 return LDAP_PROTOCOL_ERROR;
1337         }
1338
1339         if ( ctrl->ldctl_value.bv_len ) {
1340                 rs->sr_text = "treeDelete control value not empty";
1341                 return LDAP_PROTOCOL_ERROR;
1342         }
1343
1344         op->o_tree_delete = ctrl->ldctl_iscritical
1345                 ? SLAP_CONTROL_CRITICAL
1346                 : SLAP_CONTROL_NONCRITICAL;
1347
1348         return LDAP_SUCCESS;
1349 }
1350 #endif
1351
1352 #ifdef LDAP_CONTROL_X_SEARCH_OPTIONS
1353 static int parseSearchOptions (
1354         Operation *op,
1355         SlapReply *rs,
1356         LDAPControl *ctrl )
1357 {
1358         BerElement *ber;
1359         ber_int_t search_flags;
1360         ber_tag_t tag;
1361
1362         if ( ctrl->ldctl_value.bv_len == 0 ) {
1363                 rs->sr_text = "searchOptions control value not empty";
1364                 return LDAP_PROTOCOL_ERROR;
1365         }
1366
1367         ber = ber_init( &ctrl->ldctl_value );
1368         if( ber == NULL ) {
1369                 rs->sr_text = "internal error";
1370                 return LDAP_OTHER;
1371         }
1372
1373         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1374                 rs->sr_text = "searchOptions control decoding error";
1375                 return LDAP_PROTOCOL_ERROR;
1376         }
1377
1378         (void) ber_free( ber, 1 );
1379
1380         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1381                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1382                         rs->sr_text = "searchOptions control specified multiple times "
1383                                 "or with domainScope control";
1384                         return LDAP_PROTOCOL_ERROR;
1385                 }
1386
1387                 op->o_domain_scope = ctrl->ldctl_iscritical
1388                         ? SLAP_CONTROL_CRITICAL
1389                         : SLAP_CONTROL_NONCRITICAL;
1390         }
1391
1392         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1393                 /* Other search flags not recognised so far,
1394                  * including:
1395                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1396                  */
1397                 rs->sr_text = "searchOptions contained unrecongized flag";
1398                 return LDAP_UNWILLING_TO_PERFORM;
1399         }
1400
1401         return LDAP_SUCCESS;
1402 }
1403 #endif
1404