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 1998-2008 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 #include "portable.h"
  17
  18 #include <stdio.h>
  19
  20 #include <ac/string.h>
  21 #include <ac/socket.h>
  22
  23 #include "slap.h"
  24
  25 #include "../../libraries/liblber/lber-int.h"
  26
  27 static SLAP_CTRL_PARSE_FN parseAssert;
  28 static SLAP_CTRL_PARSE_FN parsePreRead;
  29 static SLAP_CTRL_PARSE_FN parsePostRead;
  30 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  31 #ifdef LDAP_DEVEL
  32 static SLAP_CTRL_PARSE_FN parseDontUseCopy;
  33 static SLAP_CTRL_PARSE_FN parseManageDIT;
  34 #endif
  35 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  36 static SLAP_CTRL_PARSE_FN parseNoOp;
  37 static SLAP_CTRL_PARSE_FN parsePagedResults;
  38 #ifdef LDAP_DEVEL
  39 static SLAP_CTRL_PARSE_FN parseSortedResults;
  40 #endif
  41 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  42 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  43 static SLAP_CTRL_PARSE_FN parseDomainScope;
  44 #ifdef SLAP_CONTROL_X_TREE_DELETE
  45 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  46 #endif
  47 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  48 static SLAP_CTRL_PARSE_FN parseSubentries;
  49
  50 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  51
  52 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  53 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  54
  55 struct slap_control_ids slap_cids;
  56
  57 struct slap_control {
  58         /* Control OID */
  59         char *sc_oid;
  60
  61         /* The controlID for this control */
  62         int sc_cid;
  63
  64         /* Operations supported by control */
  65         slap_mask_t sc_mask;
  66
  67         /* Extended operations supported by control */
  68         char **sc_extendedops;
  69
  70         /* Control parsing callback */
  71         SLAP_CTRL_PARSE_FN *sc_parse;
  72
  73         LDAP_SLIST_ENTRY(slap_control) sc_next;
  74 };
  75
  76 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  77         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  78
  79 /*
  80  * all known request control OIDs should be added to this list
  81  */
  82 /*
  83  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  84  * addresses an undefined control; this allows to safely test for
  85  * well known controls even if they are not registered, e.g. if
  86  * they get moved to modules.  An example is sc_LDAPsync, which
  87  * is implemented in the syncprov overlay and thus, if configured
  88  * as dynamic module, may not be registered.  One side effect is that
  89  * slap_known_controls[0] == NULL, so it should always be used
  90  * starting from 1.
  91  * FIXME: should we define the "undefined control" oid?
  92  */
  93 char *slap_known_controls[SLAP_MAX_CIDS+1];
  94 static int num_known_controls = 1;
  95
  96 static char *proxy_authz_extops[] = {
  97         LDAP_EXOP_MODIFY_PASSWD,
  98         LDAP_EXOP_X_WHO_AM_I,
  99         NULL
 100 };
 101
 102 static struct slap_control control_defs[] = {
 103         {  LDAP_CONTROL_ASSERT,
 104                 (int)offsetof(struct slap_control_ids, sc_assert),
 105                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
 106                         SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH, NULL,
 107                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 108         { LDAP_CONTROL_PRE_READ,
 109                 (int)offsetof(struct slap_control_ids, sc_preRead),
 110                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 111                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 112         { LDAP_CONTROL_POST_READ,
 113                 (int)offsetof(struct slap_control_ids, sc_postRead),
 114                 SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 115                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 116         { LDAP_CONTROL_VALUESRETURNFILTER,
 117                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 118                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 119                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 120 #ifdef LDAP_CONTROL_X_VALUESRETURNFILTER
 121         { LDAP_CONTROL_X_VALUESRETURNFILTER,
 122                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 123                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 124                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 125 #endif
 126         { LDAP_CONTROL_PAGEDRESULTS,
 127                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 128                 SLAP_CTRL_SEARCH, NULL,
 129                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 130 #ifdef LDAP_DEVEL
 131         { LDAP_CONTROL_SORTREQUEST,
 132                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 133                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE, NULL,
 134                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 135 #endif
 136         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 137                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 138                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE, NULL,
 139                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 140         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 141                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 142                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE, NULL,
 143                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 144 #ifdef SLAP_CONTROL_X_TREE_DELETE
 145         { LDAP_CONTROL_X_TREE_DELETE,
 146                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 147                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE, NULL,
 148                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 149 #endif
 150         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 151                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 152                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE, NULL,
 153                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 154         { LDAP_CONTROL_SUBENTRIES,
 155                 (int)offsetof(struct slap_control_ids, sc_subentries),
 156                 SLAP_CTRL_SEARCH, NULL,
 157                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 158         { LDAP_CONTROL_NOOP,
 159                 (int)offsetof(struct slap_control_ids, sc_noOp),
 160                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE, NULL,
 161                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 162 #ifdef LDAP_DEVEL
 163         { LDAP_CONTROL_DONTUSECOPY,
 164                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 165                 SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE, NULL,
 166                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 167         { LDAP_CONTROL_MANAGEDIT,
 168                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 169                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE, NULL,
 170                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 171 #endif
 172         { LDAP_CONTROL_MANAGEDSAIT,
 173                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 174                 SLAP_CTRL_ACCESS, NULL,
 175                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 176         { LDAP_CONTROL_PROXY_AUTHZ,
 177                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 178                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS, proxy_authz_extops,
 179                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 180         { NULL, 0, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 181 };
 182
 183 /*
 184  * Register a supported control.
 185  *
 186  * This can be called by an OpenLDAP plugin or, indirectly, by a
 187  * SLAPI plugin calling slapi_register_supported_control().
 188  */
 189 int
 190 register_supported_control(const char *controloid,
 191         slap_mask_t controlmask,
 192         char **controlexops,
 193         SLAP_CTRL_PARSE_FN *controlparsefn,
 194         int *controlcid)
 195 {
 196         struct slap_control *sc;
 197         int i;
 198
 199         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 200                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 201                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 202                 SLAP_MAX_CIDS, 0, 0 );
 203                 return LDAP_OTHER;
 204         }
 205
 206         if ( controloid == NULL ) return LDAP_PARAM_ERROR;
 207
 208         /* sanity check - should never happen */
 209         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 210                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 211                         Debug( LDAP_DEBUG_ANY,
 212                                 "Control %s already registered.\n",
 213                                 controloid, 0, 0 );
 214                         return LDAP_PARAM_ERROR;
 215                 }
 216         }
 217
 218         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 219         if ( sc == NULL ) return LDAP_NO_MEMORY;
 220
 221         sc->sc_oid = ch_strdup( controloid );
 222         sc->sc_mask = controlmask;
 223         if ( controlexops != NULL ) {
 224                 sc->sc_extendedops = ldap_charray_dup( controlexops );
 225                 if ( sc->sc_extendedops == NULL ) {
 226                         ch_free( sc );
 227                         return LDAP_NO_MEMORY;
 228                 }
 229         } else {
 230                 sc->sc_extendedops = NULL;
 231         }
 232         sc->sc_parse = controlparsefn;
 233
 234         if ( controlcid ) *controlcid = num_known_controls;
 235         sc->sc_cid = num_known_controls;
 236
 237         /* Update slap_known_controls, too. */
 238         slap_known_controls[num_known_controls-1] = sc->sc_oid;
 239         slap_known_controls[num_known_controls++] = NULL;
 240
 241         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 242         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 243         return LDAP_SUCCESS;
 244 }
 245
 246 /*
 247  * One-time initialization of internal controls.
 248  */
 249 int
 250 slap_controls_init( void )
 251 {
 252         int i, rc;
 253
 254         rc = LDAP_SUCCESS;
 255
 256         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 257                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 258                 rc = register_supported_control( control_defs[i].sc_oid,
 259                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 260                         control_defs[i].sc_parse, cid );
 261                 if ( rc != LDAP_SUCCESS ) break;
 262         }
 263
 264         return rc;
 265 }
 266
 267 /*
 268  * Free memory associated with list of supported controls.
 269  */
 270 void
 271 controls_destroy( void )
 272 {
 273         struct slap_control *sc;
 274
 275         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 276                 sc = LDAP_SLIST_FIRST(&controls_list);
 277                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 278
 279                 ch_free( sc->sc_oid );
 280                 if ( sc->sc_extendedops != NULL ) {
 281                         ldap_charray_free( sc->sc_extendedops );
 282                 }
 283                 ch_free( sc );
 284         }
 285 }
 286
 287 /*
 288  * Format the supportedControl attribute of the root DSE,
 289  * detailing which controls are supported by the directory
 290  * server.
 291  */
 292 int
 293 controls_root_dse_info( Entry *e )
 294 {
 295         AttributeDescription *ad_supportedControl
 296                 = slap_schema.si_ad_supportedControl;
 297         struct berval vals[2];
 298         struct slap_control *sc;
 299
 300         vals[1].bv_val = NULL;
 301         vals[1].bv_len = 0;
 302
 303         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 304                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 305
 306                 vals[0].bv_val = sc->sc_oid;
 307                 vals[0].bv_len = strlen( sc->sc_oid );
 308
 309                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 310                         return -1;
 311                 }
 312         }
 313
 314         return 0;
 315 }
 316
 317 /*
 318  * Return a list of OIDs and operation masks for supported
 319  * controls. Used by SLAPI.
 320  */
 321 int
 322 get_supported_controls(char ***ctrloidsp,
 323         slap_mask_t **ctrlmasks)
 324 {
 325         int n;
 326         char **oids;
 327         slap_mask_t *masks;
 328         struct slap_control *sc;
 329
 330         n = 0;
 331
 332         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 333                 n++;
 334         }
 335
 336         if ( n == 0 ) {
 337                 *ctrloidsp = NULL;
 338                 *ctrlmasks = NULL;
 339                 return LDAP_SUCCESS;
 340         }
 341
 342         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 343         if ( oids == NULL ) {
 344                 return LDAP_NO_MEMORY;
 345         }
 346         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 347         if  ( masks == NULL ) {
 348                 ch_free( oids );
 349                 return LDAP_NO_MEMORY;
 350         }
 351
 352         n = 0;
 353
 354         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 355                 oids[n] = ch_strdup( sc->sc_oid );
 356                 masks[n] = sc->sc_mask;
 357                 n++;
 358         }
 359         oids[n] = NULL;
 360         masks[n] = 0;
 361
 362         *ctrloidsp = oids;
 363         *ctrlmasks = masks;
 364
 365         return LDAP_SUCCESS;
 366 }
 367
 368 /*
 369  * Find a control given its OID.
 370  */
 371 static struct slap_control *
 372 find_ctrl( const char *oid )
 373 {
 374         struct slap_control *sc;
 375
 376         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 377                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 378                         return sc;
 379                 }
 380         }
 381
 382         return NULL;
 383 }
 384
 385 int
 386 slap_find_control_id(
 387         const char *oid,
 388         int *cid )
 389 {
 390         struct slap_control *ctrl = find_ctrl( oid );
 391         if ( ctrl ) {
 392                 if ( cid ) *cid = ctrl->sc_cid;
 393                 return LDAP_SUCCESS;
 394         }
 395         return LDAP_CONTROL_NOT_FOUND;
 396 }
 397
 398 int
 399 slap_global_control( Operation *op, const char *oid, int *cid )
 400 {
 401         struct slap_control *ctrl = find_ctrl( oid );
 402
 403         if ( ctrl == NULL ) {
 404                 /* should not be reachable */
 405                 Debug( LDAP_DEBUG_ANY,
 406                         "slap_global_control: unrecognized control: %s\n",
 407                         oid, 0, 0 );
 408                 return LDAP_CONTROL_NOT_FOUND;
 409         }
 410
 411         if ( cid ) *cid = ctrl->sc_cid;
 412
 413         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 414                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 415                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 416         {
 417                 return LDAP_COMPARE_TRUE;
 418         }
 419
 420         Debug( LDAP_DEBUG_TRACE,
 421                 "slap_global_control: unavailable control: %s\n",
 422                 oid, 0, 0 );
 423
 424         return LDAP_COMPARE_FALSE;
 425 }
 426
 427 void slap_free_ctrls(
 428         Operation *op,
 429         LDAPControl **ctrls )
 430 {
 431         int i;
 432
 433         for (i=0; ctrls[i]; i++) {
 434                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 435         }
 436         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 437 }
 438
 439 int slap_parse_ctrl(
 440         Operation *op,
 441         SlapReply *rs,
 442         LDAPControl *control,
 443         const char **text )
 444 {
 445         struct slap_control *sc;
 446
 447         sc = find_ctrl( control->ldctl_oid );
 448         if( sc != NULL ) {
 449                 /* recognized control */
 450                 slap_mask_t tagmask;
 451                 switch( op->o_tag ) {
 452                 case LDAP_REQ_ADD:
 453                         tagmask = SLAP_CTRL_ADD;
 454                         break;
 455                 case LDAP_REQ_BIND:
 456                         tagmask = SLAP_CTRL_BIND;
 457                         break;
 458                 case LDAP_REQ_COMPARE:
 459                         tagmask = SLAP_CTRL_COMPARE;
 460                         break;
 461                 case LDAP_REQ_DELETE:
 462                         tagmask = SLAP_CTRL_DELETE;
 463                         break;
 464                 case LDAP_REQ_MODIFY:
 465                         tagmask = SLAP_CTRL_MODIFY;
 466                         break;
 467                 case LDAP_REQ_RENAME:
 468                         tagmask = SLAP_CTRL_RENAME;
 469                         break;
 470                 case LDAP_REQ_SEARCH:
 471                         tagmask = SLAP_CTRL_SEARCH;
 472                         break;
 473                 case LDAP_REQ_UNBIND:
 474                         tagmask = SLAP_CTRL_UNBIND;
 475                         break;
 476                 case LDAP_REQ_ABANDON:
 477                         tagmask = SLAP_CTRL_ABANDON;
 478                         break;
 479                 case LDAP_REQ_EXTENDED:
 480                         tagmask=~0L;
 481                         assert( op->ore_reqoid.bv_val != NULL );
 482                         if( sc->sc_extendedops != NULL ) {
 483                                 int i;
 484                                 for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 485                                         if( strcmp( op->ore_reqoid.bv_val,
 486                                                 sc->sc_extendedops[i] ) == 0 )
 487                                         {
 488                                                 tagmask=0L;
 489                                                 break;
 490                                         }
 491                                 }
 492                         }
 493                         break;
 494                 default:
 495                         *text = "controls internal error";
 496                         return LDAP_OTHER;
 497                 }
 498
 499                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 500                         /* available extension */
 501                         int     rc;
 502
 503                         if( !sc->sc_parse ) {
 504                                 *text = "not yet implemented";
 505                                 return LDAP_OTHER;
 506                         }
 507
 508                         rc = sc->sc_parse( op, rs, control );
 509                         if ( rc ) {
 510                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 511                                 return rc;
 512                         }
 513
 514                 } else if( control->ldctl_iscritical ) {
 515                         /* unavailable CRITICAL control */
 516                         *text = "critical extension is unavailable";
 517                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 518                 }
 519         } else if( control->ldctl_iscritical ) {
 520                 /* unrecognized CRITICAL control */
 521                 *text = "critical extension is not recognized";
 522                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 523         }
 524
 525         return LDAP_SUCCESS;
 526 }
 527
 528 int get_ctrls(
 529         Operation *op,
 530         SlapReply *rs,
 531         int sendres )
 532 {
 533         int nctrls = 0;
 534         ber_tag_t tag;
 535         ber_len_t len;
 536         char *opaque;
 537         BerElement *ber = op->o_ber;
 538         struct berval bv;
 539
 540         len = ber_pvt_ber_remaining(ber);
 541
 542         if( len == 0) {
 543                 /* no controls */
 544                 rs->sr_err = LDAP_SUCCESS;
 545                 return rs->sr_err;
 546         }
 547
 548         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 549                 if( tag == LBER_ERROR ) {
 550                         rs->sr_err = SLAPD_DISCONNECT;
 551                         rs->sr_text = "unexpected data in PDU";
 552                 }
 553
 554                 goto return_results;
 555         }
 556
 557         Debug( LDAP_DEBUG_TRACE,
 558                 "=> get_ctrls\n", 0, 0, 0 );
 559
 560         if( op->o_protocol < LDAP_VERSION3 ) {
 561                 rs->sr_err = SLAPD_DISCONNECT;
 562                 rs->sr_text = "controls require LDAPv3";
 563                 goto return_results;
 564         }
 565
 566         /* one for first control, one for termination */
 567         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 568
 569 #if 0
 570         if( op->ctrls == NULL ) {
 571                 rs->sr_err = LDAP_NO_MEMORY;
 572                 rs->sr_text = "no memory";
 573                 goto return_results;
 574         }
 575 #endif
 576
 577         op->o_ctrls[nctrls] = NULL;
 578
 579         /* step through each element */
 580         for( tag = ber_first_element( ber, &len, &opaque );
 581                 tag != LBER_ERROR;
 582                 tag = ber_next_element( ber, &len, opaque ) )
 583         {
 584                 LDAPControl *c;
 585                 LDAPControl **tctrls;
 586
 587                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 588                 memset(c, 0, sizeof(LDAPControl));
 589
 590                 /* allocate pointer space for current controls (nctrls)
 591                  * + this control + extra NULL
 592                  */
 593                 tctrls = op->o_tmprealloc( op->o_ctrls,
 594                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 595
 596 #if 0
 597                 if( tctrls == NULL ) {
 598                         ch_free( c );
 599                         ldap_controls_free(op->o_ctrls);
 600                         op->o_ctrls = NULL;
 601
 602                         rs->sr_err = LDAP_NO_MEMORY;
 603                         rs->sr_text = "no memory";
 604                         goto return_results;
 605                 }
 606 #endif
 607                 op->o_ctrls = tctrls;
 608
 609                 op->o_ctrls[nctrls++] = c;
 610                 op->o_ctrls[nctrls] = NULL;
 611
 612                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 613                 c->ldctl_oid = bv.bv_val;
 614
 615                 if( tag == LBER_ERROR ) {
 616                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 617                                 0, 0, 0 );
 618
 619                         slap_free_ctrls( op, op->o_ctrls );
 620                         op->o_ctrls = NULL;
 621                         rs->sr_err = SLAPD_DISCONNECT;
 622                         rs->sr_text = "decoding controls error";
 623                         goto return_results;
 624
 625                 } else if( c->ldctl_oid == NULL ) {
 626                         Debug( LDAP_DEBUG_TRACE,
 627                                 "get_ctrls: conn %lu got emtpy OID.\n",
 628                                 op->o_connid, 0, 0 );
 629
 630                         slap_free_ctrls( op, op->o_ctrls );
 631                         op->o_ctrls = NULL;
 632                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 633                         rs->sr_text = "OID field is empty";
 634                         goto return_results;
 635                 }
 636
 637                 tag = ber_peek_tag( ber, &len );
 638
 639                 if( tag == LBER_BOOLEAN ) {
 640                         ber_int_t crit;
 641                         tag = ber_scanf( ber, "b", &crit );
 642
 643                         if( tag == LBER_ERROR ) {
 644                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 645                                         0, 0, 0 );
 646                                 slap_free_ctrls( op, op->o_ctrls );
 647                                 op->o_ctrls = NULL;
 648                                 rs->sr_err = SLAPD_DISCONNECT;
 649                                 rs->sr_text = "decoding controls error";
 650                                 goto return_results;
 651                         }
 652
 653                         c->ldctl_iscritical = (crit != 0);
 654                         tag = ber_peek_tag( ber, &len );
 655                 }
 656
 657                 if( tag == LBER_OCTETSTRING ) {
 658                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 659
 660                         if( tag == LBER_ERROR ) {
 661                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 662                                         "%s (%scritical): get value failed.\n",
 663                                         op->o_connid, c->ldctl_oid,
 664                                         c->ldctl_iscritical ? "" : "non" );
 665                                 slap_free_ctrls( op, op->o_ctrls );
 666                                 op->o_ctrls = NULL;
 667                                 rs->sr_err = SLAPD_DISCONNECT;
 668                                 rs->sr_text = "decoding controls error";
 669                                 goto return_results;
 670                         }
 671                 }
 672
 673                 Debug( LDAP_DEBUG_TRACE,
 674                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 675                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 676
 677                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 678                 if ( rs->sr_err != LDAP_SUCCESS ) {
 679                         goto return_results;
 680                 }
 681         }
 682
 683 return_results:
 684         Debug( LDAP_DEBUG_TRACE,
 685                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 686                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 687
 688         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 689                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 690                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 691                         send_ldap_disconnect( op, rs );
 692                         rs->sr_err = SLAPD_DISCONNECT;
 693                 } else {
 694                         send_ldap_result( op, rs );
 695                 }
 696         }
 697
 698         return rs->sr_err;
 699 }
 700
 701 int
 702 slap_remove_control(
 703         Operation       *op,
 704         SlapReply       *rs,
 705         int             ctrl,
 706         BI_chk_controls fnc )
 707 {
 708         int             i, j;
 709
 710         switch ( op->o_ctrlflag[ ctrl ] ) {
 711         case SLAP_CONTROL_NONCRITICAL:
 712                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 713                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 714                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 715                         {
 716                                 j = i;
 717                         }
 718                 }
 719
 720                 if ( j == -1 ) {
 721                         rs->sr_err = LDAP_OTHER;
 722                         break;
 723                 }
 724
 725                 if ( fnc ) {
 726                         (void)fnc( op, rs );
 727                 }
 728
 729                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 730
 731                 if ( i > 1 ) {
 732                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 733                                 ( i - j ) * sizeof( LDAPControl * ) );
 734
 735                 } else {
 736                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 737                         op->o_ctrls = NULL;
 738                 }
 739
 740                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 741
 742                 Debug( LDAP_DEBUG_ANY, "%s: "
 743                         "non-critical control \"%s\" not supported; stripped.\n",
 744                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 745                 /* fall thru */
 746
 747         case SLAP_CONTROL_IGNORED:
 748         case SLAP_CONTROL_NONE:
 749                 rs->sr_err = SLAP_CB_CONTINUE;
 750                 break;
 751
 752         case SLAP_CONTROL_CRITICAL:
 753                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 754                 if ( fnc ) {
 755                         (void)fnc( op, rs );
 756                 }
 757                 Debug( LDAP_DEBUG_ANY, "%s: "
 758                         "critical control \"%s\" not supported.\n",
 759                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 760                 break;
 761
 762         default:
 763                 /* handle all cases! */
 764                 assert( 0 );
 765         }
 766
 767         return rs->sr_err;
 768 }
 769
 770 #ifdef LDAP_DEVEL
 771 static int parseDontUseCopy (
 772         Operation *op,
 773         SlapReply *rs,
 774         LDAPControl *ctrl )
 775 {
 776         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 777                 rs->sr_text = "dontUseCopy control specified multiple times";
 778                 return LDAP_PROTOCOL_ERROR;
 779         }
 780
 781         if ( ctrl->ldctl_value.bv_len ) {
 782                 rs->sr_text = "dontUseCopy control value not empty";
 783                 return LDAP_PROTOCOL_ERROR;
 784         }
 785
 786         if ( ctrl->ldctl_iscritical != SLAP_CONTROL_CRITICAL ) {
 787                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 788                 return LDAP_PROTOCOL_ERROR;
 789         }
 790
 791         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 792         return LDAP_SUCCESS;
 793 }
 794
 795 static int parseManageDIT (
 796         Operation *op,
 797         SlapReply *rs,
 798         LDAPControl *ctrl )
 799 {
 800         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 801                 rs->sr_text = "manageDIT control specified multiple times";
 802                 return LDAP_PROTOCOL_ERROR;
 803         }
 804
 805         if ( ctrl->ldctl_value.bv_len ) {
 806                 rs->sr_text = "manageDIT control value not empty";
 807                 return LDAP_PROTOCOL_ERROR;
 808         }
 809
 810         op->o_managedit = ctrl->ldctl_iscritical
 811                 ? SLAP_CONTROL_CRITICAL
 812                 : SLAP_CONTROL_NONCRITICAL;
 813
 814         return LDAP_SUCCESS;
 815 }
 816 #endif
 817
 818 static int parseManageDSAit (
 819         Operation *op,
 820         SlapReply *rs,
 821         LDAPControl *ctrl )
 822 {
 823         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 824                 rs->sr_text = "manageDSAit control specified multiple times";
 825                 return LDAP_PROTOCOL_ERROR;
 826         }
 827
 828         if ( ctrl->ldctl_value.bv_len ) {
 829                 rs->sr_text = "manageDSAit control value not empty";
 830                 return LDAP_PROTOCOL_ERROR;
 831         }
 832
 833         op->o_managedsait = ctrl->ldctl_iscritical
 834                 ? SLAP_CONTROL_CRITICAL
 835                 : SLAP_CONTROL_NONCRITICAL;
 836
 837         return LDAP_SUCCESS;
 838 }
 839
 840 static int parseProxyAuthz (
 841         Operation *op,
 842         SlapReply *rs,
 843         LDAPControl *ctrl )
 844 {
 845         int             rc;
 846         struct berval   dn = BER_BVNULL;
 847
 848         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 849                 rs->sr_text = "proxy authorization control specified multiple times";
 850                 return LDAP_PROTOCOL_ERROR;
 851         }
 852
 853         if ( BER_BVISEMPTY( &op->o_ndn ) ) {
 854                 rs->sr_text = "anonymous proxyAuthz not allowed";
 855                 return LDAP_PROXY_AUTHZ_FAILURE;
 856         }
 857
 858         op->o_proxy_authz = ctrl->ldctl_iscritical
 859                 ? SLAP_CONTROL_CRITICAL
 860                 : SLAP_CONTROL_NONCRITICAL;
 861
 862         Debug( LDAP_DEBUG_ARGS,
 863                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 864                 op->o_connid,
 865                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 866                 0 );
 867
 868         if ( ctrl->ldctl_value.bv_len == 0 ) {
 869                 Debug( LDAP_DEBUG_TRACE,
 870                         "parseProxyAuthz: conn=%lu anonymous\n",
 871                         op->o_connid, 0, 0 );
 872
 873                 /* anonymous */
 874                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 875                         op->o_ndn.bv_val[ 0 ] = '\0';
 876                 }
 877                 op->o_ndn.bv_len = 0;
 878
 879                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 880                         op->o_dn.bv_val[ 0 ] = '\0';
 881                 }
 882                 op->o_dn.bv_len = 0;
 883
 884                 return LDAP_SUCCESS;
 885         }
 886
 887         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 888                         NULL, &dn, SLAP_GETDN_AUTHZID );
 889
 890         /* FIXME: empty DN in proxyAuthz control should be legal... */
 891         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 892                 if ( dn.bv_val ) {
 893                         ch_free( dn.bv_val );
 894                 }
 895                 rs->sr_text = "authzId mapping failed";
 896                 return LDAP_PROXY_AUTHZ_FAILURE;
 897         }
 898
 899         Debug( LDAP_DEBUG_TRACE,
 900                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 901                 op->o_connid,
 902                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 903
 904         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 905
 906         if ( rc ) {
 907                 ch_free( dn.bv_val );
 908                 rs->sr_text = "not authorized to assume identity";
 909                 return LDAP_PROXY_AUTHZ_FAILURE;
 910         }
 911
 912         ch_free( op->o_ndn.bv_val );
 913         ch_free( op->o_dn.bv_val );
 914
 915         /*
 916          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 917          * from now on op->o_dn is normalized
 918          */
 919         op->o_ndn = dn;
 920         ber_dupbv( &op->o_dn, &dn );
 921
 922         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 923             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 924
 925         return LDAP_SUCCESS;
 926 }
 927
 928 static int parseNoOp (
 929         Operation *op,
 930         SlapReply *rs,
 931         LDAPControl *ctrl )
 932 {
 933         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 934                 rs->sr_text = "noop control specified multiple times";
 935                 return LDAP_PROTOCOL_ERROR;
 936         }
 937
 938         if ( ctrl->ldctl_value.bv_len ) {
 939                 rs->sr_text = "noop control value not empty";
 940                 return LDAP_PROTOCOL_ERROR;
 941         }
 942
 943         op->o_noop = ctrl->ldctl_iscritical
 944                 ? SLAP_CONTROL_CRITICAL
 945                 : SLAP_CONTROL_NONCRITICAL;
 946
 947         return LDAP_SUCCESS;
 948 }
 949
 950 static int parsePagedResults (
 951         Operation *op,
 952         SlapReply *rs,
 953         LDAPControl *ctrl )
 954 {
 955         int             rc = LDAP_SUCCESS;
 956         ber_tag_t       tag;
 957         ber_int_t       size;
 958         BerElement      *ber;
 959         struct berval   cookie = BER_BVNULL;
 960         PagedResultsState       *ps;
 961
 962         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
 963                 rs->sr_text = "paged results control specified multiple times";
 964                 return LDAP_PROTOCOL_ERROR;
 965         }
 966
 967         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 968                 rs->sr_text = "paged results control value is empty (or absent)";
 969                 return LDAP_PROTOCOL_ERROR;
 970         }
 971
 972         /* Parse the control value
 973          *      realSearchControlValue ::= SEQUENCE {
 974          *              size    INTEGER (0..maxInt),
 975          *                              -- requested page size from client
 976          *                              -- result set size estimate from server
 977          *              cookie  OCTET STRING
 978          * }
 979          */
 980         ber = ber_init( &ctrl->ldctl_value );
 981         if ( ber == NULL ) {
 982                 rs->sr_text = "internal error";
 983                 return LDAP_OTHER;
 984         }
 985
 986         tag = ber_scanf( ber, "{im}", &size, &cookie );
 987
 988         if ( tag == LBER_ERROR ) {
 989                 rs->sr_text = "paged results control could not be decoded";
 990                 rc = LDAP_PROTOCOL_ERROR;
 991                 goto done;
 992         }
 993
 994         if ( size < 0 ) {
 995                 rs->sr_text = "paged results control size invalid";
 996                 rc = LDAP_PROTOCOL_ERROR;
 997                 goto done;
 998         }
 999
1000         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1001         *ps = op->o_conn->c_pagedresults_state;
1002         ps->ps_size = size;
1003         op->o_pagedresults_state = ps;
1004         if ( !cookie.bv_len ) {
1005                 ps->ps_count = 0;
1006                 ps->ps_cookie = 0;
1007         }
1008
1009         /* NOTE: according to RFC 2696 3.:
1010
1011     If the page size is greater than or equal to the sizeLimit value, the
1012     server should ignore the control as the request can be satisfied in a
1013     single page.
1014
1015          * NOTE: this assumes that the op->ors_slimit be set
1016          * before the controls are parsed.
1017          */
1018
1019         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1020                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1021
1022         } else if ( ctrl->ldctl_iscritical ) {
1023                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1024
1025         } else {
1026                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1027         }
1028
1029 done:;
1030         (void)ber_free( ber, 1 );
1031         return rc;
1032 }
1033
1034 #ifdef LDAP_DEVEL
1035 static int parseSortedResults (
1036         Operation *op,
1037         SlapReply *rs,
1038         LDAPControl *ctrl )
1039 {
1040         int             rc = LDAP_SUCCESS;
1041
1042         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1043                 rs->sr_text = "sorted results control specified multiple times";
1044                 return LDAP_PROTOCOL_ERROR;
1045         }
1046
1047         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1048                 rs->sr_text = "sorted results control value is empty (or absent)";
1049                 return LDAP_PROTOCOL_ERROR;
1050         }
1051
1052         /* blow off parsing the value */
1053
1054         op->o_sortedresults = ctrl->ldctl_iscritical
1055                 ? SLAP_CONTROL_CRITICAL
1056                 : SLAP_CONTROL_NONCRITICAL;
1057
1058         return rc;
1059 }
1060 #endif
1061
1062 static int parseAssert (
1063         Operation *op,
1064         SlapReply *rs,
1065         LDAPControl *ctrl )
1066 {
1067         BerElement      *ber;
1068         struct berval   fstr = BER_BVNULL;
1069
1070         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1071                 rs->sr_text = "assert control specified multiple times";
1072                 return LDAP_PROTOCOL_ERROR;
1073         }
1074
1075         if ( ctrl->ldctl_value.bv_len == 0 ) {
1076                 rs->sr_text = "assert control value is empty (or absent)";
1077                 return LDAP_PROTOCOL_ERROR;
1078         }
1079
1080         ber = ber_init( &(ctrl->ldctl_value) );
1081         if (ber == NULL) {
1082                 rs->sr_text = "assert control: internal error";
1083                 return LDAP_OTHER;
1084         }
1085
1086         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1087                 &rs->sr_text);
1088         if( rs->sr_err != LDAP_SUCCESS ) {
1089                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1090                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1091                         send_ldap_disconnect( op, rs );
1092                         rs->sr_err = SLAPD_DISCONNECT;
1093                 } else {
1094                         send_ldap_result( op, rs );
1095                 }
1096                 if( op->o_assertion != NULL ) {
1097                         filter_free_x( op, op->o_assertion );
1098                 }
1099                 return rs->sr_err;
1100         }
1101
1102 #ifdef LDAP_DEBUG
1103         filter2bv_x( op, op->o_assertion, &fstr );
1104
1105         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1106                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1107         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1108 #endif
1109
1110         op->o_assert = ctrl->ldctl_iscritical
1111                 ? SLAP_CONTROL_CRITICAL
1112                 : SLAP_CONTROL_NONCRITICAL;
1113
1114         rs->sr_err = LDAP_SUCCESS;
1115         return LDAP_SUCCESS;
1116 }
1117
1118 static int parsePreRead (
1119         Operation *op,
1120         SlapReply *rs,
1121         LDAPControl *ctrl )
1122 {
1123         ber_len_t siz, off, i;
1124         AttributeName *an = NULL;
1125         BerElement      *ber;
1126
1127         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1128                 rs->sr_text = "preread control specified multiple times";
1129                 return LDAP_PROTOCOL_ERROR;
1130         }
1131
1132         if ( ctrl->ldctl_value.bv_len == 0 ) {
1133                 rs->sr_text = "preread control value is empty (or absent)";
1134                 return LDAP_PROTOCOL_ERROR;
1135         }
1136
1137         ber = ber_init( &(ctrl->ldctl_value) );
1138         if (ber == NULL) {
1139                 rs->sr_text = "preread control: internal error";
1140                 return LDAP_OTHER;
1141         }
1142
1143         siz = sizeof( AttributeName );
1144         off = offsetof( AttributeName, an_name );
1145         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1146                 rs->sr_text = "preread control: decoding error";
1147                 return LDAP_PROTOCOL_ERROR;
1148         }
1149
1150         for( i=0; i<siz; i++ ) {
1151                 int             rc = LDAP_SUCCESS;
1152                 const char      *dummy = NULL;
1153
1154                 an[i].an_desc = NULL;
1155                 an[i].an_oc = NULL;
1156                 an[i].an_oc_exclude = 0;
1157                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1158                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1159                         rs->sr_text = dummy
1160                                 ? dummy
1161                                 : "postread control: unknown attributeType";
1162                         return rc;
1163                 }
1164         }
1165
1166         op->o_preread = ctrl->ldctl_iscritical
1167                 ? SLAP_CONTROL_CRITICAL
1168                 : SLAP_CONTROL_NONCRITICAL;
1169
1170         op->o_preread_attrs = an;
1171
1172         rs->sr_err = LDAP_SUCCESS;
1173         return LDAP_SUCCESS;
1174 }
1175
1176 static int parsePostRead (
1177         Operation *op,
1178         SlapReply *rs,
1179         LDAPControl *ctrl )
1180 {
1181         ber_len_t siz, off, i;
1182         AttributeName *an = NULL;
1183         BerElement      *ber;
1184
1185         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1186                 rs->sr_text = "postread control specified multiple times";
1187                 return LDAP_PROTOCOL_ERROR;
1188         }
1189
1190         if ( ctrl->ldctl_value.bv_len == 0 ) {
1191                 rs->sr_text = "postread control value is empty (or absent)";
1192                 return LDAP_PROTOCOL_ERROR;
1193         }
1194
1195         ber = ber_init( &(ctrl->ldctl_value) );
1196         if (ber == NULL) {
1197                 rs->sr_text = "postread control: internal error";
1198                 return LDAP_OTHER;
1199         }
1200
1201         siz = sizeof( AttributeName );
1202         off = offsetof( AttributeName, an_name );
1203         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1204                 rs->sr_text = "postread control: decoding error";
1205                 return LDAP_PROTOCOL_ERROR;
1206         }
1207
1208         for( i=0; i<siz; i++ ) {
1209                 int             rc = LDAP_SUCCESS;
1210                 const char      *dummy = NULL;
1211
1212                 an[i].an_desc = NULL;
1213                 an[i].an_oc = NULL;
1214                 an[i].an_oc_exclude = 0;
1215                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1216                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1217                         rs->sr_text = dummy
1218                                 ? dummy
1219                                 : "postread control: unknown attributeType";
1220                         return rc;
1221                 }
1222         }
1223
1224         op->o_postread = ctrl->ldctl_iscritical
1225                 ? SLAP_CONTROL_CRITICAL
1226                 : SLAP_CONTROL_NONCRITICAL;
1227
1228         op->o_postread_attrs = an;
1229
1230         rs->sr_err = LDAP_SUCCESS;
1231         return LDAP_SUCCESS;
1232 }
1233
1234 static int parseValuesReturnFilter (
1235         Operation *op,
1236         SlapReply *rs,
1237         LDAPControl *ctrl )
1238 {
1239         BerElement      *ber;
1240         struct berval   fstr = BER_BVNULL;
1241
1242         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1243                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1244                 return LDAP_PROTOCOL_ERROR;
1245         }
1246
1247         if ( ctrl->ldctl_value.bv_len == 0 ) {
1248                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1249                 return LDAP_PROTOCOL_ERROR;
1250         }
1251
1252         ber = ber_init( &(ctrl->ldctl_value) );
1253         if (ber == NULL) {
1254                 rs->sr_text = "internal error";
1255                 return LDAP_OTHER;
1256         }
1257
1258         rs->sr_err = get_vrFilter( op, ber,
1259                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1260
1261         (void) ber_free( ber, 1 );
1262
1263         if( rs->sr_err != LDAP_SUCCESS ) {
1264                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1265                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1266                         send_ldap_disconnect( op, rs );
1267                         rs->sr_err = SLAPD_DISCONNECT;
1268                 } else {
1269                         send_ldap_result( op, rs );
1270                 }
1271                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1272         }
1273 #ifdef LDAP_DEBUG
1274         else {
1275                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1276         }
1277
1278         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1279                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1280         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1281 #endif
1282
1283         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1284                 ? SLAP_CONTROL_CRITICAL
1285                 : SLAP_CONTROL_NONCRITICAL;
1286
1287         rs->sr_err = LDAP_SUCCESS;
1288         return LDAP_SUCCESS;
1289 }
1290
1291 static int parseSubentries (
1292         Operation *op,
1293         SlapReply *rs,
1294         LDAPControl *ctrl )
1295 {
1296         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1297                 rs->sr_text = "subentries control specified multiple times";
1298                 return LDAP_PROTOCOL_ERROR;
1299         }
1300
1301         /* FIXME: should use BER library */
1302         if( ( ctrl->ldctl_value.bv_len != 3 )
1303                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1304                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1305         {
1306                 rs->sr_text = "subentries control value encoding is bogus";
1307                 return LDAP_PROTOCOL_ERROR;
1308         }
1309
1310         op->o_subentries = ctrl->ldctl_iscritical
1311                 ? SLAP_CONTROL_CRITICAL
1312                 : SLAP_CONTROL_NONCRITICAL;
1313
1314         if (ctrl->ldctl_value.bv_val[2]) {
1315                 set_subentries_visibility( op );
1316         }
1317
1318         return LDAP_SUCCESS;
1319 }
1320
1321 static int parsePermissiveModify (
1322         Operation *op,
1323         SlapReply *rs,
1324         LDAPControl *ctrl )
1325 {
1326         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1327                 rs->sr_text = "permissiveModify control specified multiple times";
1328                 return LDAP_PROTOCOL_ERROR;
1329         }
1330
1331         if ( ctrl->ldctl_value.bv_len ) {
1332                 rs->sr_text = "permissiveModify control value not empty";
1333                 return LDAP_PROTOCOL_ERROR;
1334         }
1335
1336         op->o_permissive_modify = ctrl->ldctl_iscritical
1337                 ? SLAP_CONTROL_CRITICAL
1338                 : SLAP_CONTROL_NONCRITICAL;
1339
1340         return LDAP_SUCCESS;
1341 }
1342
1343 static int parseDomainScope (
1344         Operation *op,
1345         SlapReply *rs,
1346         LDAPControl *ctrl )
1347 {
1348         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1349                 rs->sr_text = "domainScope control specified multiple times";
1350                 return LDAP_PROTOCOL_ERROR;
1351         }
1352
1353         if ( ctrl->ldctl_value.bv_len ) {
1354                 rs->sr_text = "domainScope control value not empty";
1355                 return LDAP_PROTOCOL_ERROR;
1356         }
1357
1358         op->o_domain_scope = ctrl->ldctl_iscritical
1359                 ? SLAP_CONTROL_CRITICAL
1360                 : SLAP_CONTROL_NONCRITICAL;
1361
1362         return LDAP_SUCCESS;
1363 }
1364
1365 #ifdef SLAP_CONTROL_X_TREE_DELETE
1366 static int parseTreeDelete (
1367         Operation *op,
1368         SlapReply *rs,
1369         LDAPControl *ctrl )
1370 {
1371         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1372                 rs->sr_text = "treeDelete control specified multiple times";
1373                 return LDAP_PROTOCOL_ERROR;
1374         }
1375
1376         if ( ctrl->ldctl_value.bv_len ) {
1377                 rs->sr_text = "treeDelete control value not empty";
1378                 return LDAP_PROTOCOL_ERROR;
1379         }
1380
1381         op->o_tree_delete = ctrl->ldctl_iscritical
1382                 ? SLAP_CONTROL_CRITICAL
1383                 : SLAP_CONTROL_NONCRITICAL;
1384
1385         return LDAP_SUCCESS;
1386 }
1387 #endif
1388
1389 static int parseSearchOptions (
1390         Operation *op,
1391         SlapReply *rs,
1392         LDAPControl *ctrl )
1393 {
1394         BerElement *ber;
1395         ber_int_t search_flags;
1396         ber_tag_t tag;
1397
1398         if ( ctrl->ldctl_value.bv_len == 0 ) {
1399                 rs->sr_text = "searchOptions control value is empty (or absent)";
1400                 return LDAP_PROTOCOL_ERROR;
1401         }
1402
1403         ber = ber_init( &ctrl->ldctl_value );
1404         if( ber == NULL ) {
1405                 rs->sr_text = "internal error";
1406                 return LDAP_OTHER;
1407         }
1408
1409         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1410                 rs->sr_text = "searchOptions control decoding error";
1411                 return LDAP_PROTOCOL_ERROR;
1412         }
1413
1414         (void) ber_free( ber, 1 );
1415
1416         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1417                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1418                         rs->sr_text = "searchOptions control specified multiple times "
1419                                 "or with domainScope control";
1420                         return LDAP_PROTOCOL_ERROR;
1421                 }
1422
1423                 op->o_domain_scope = ctrl->ldctl_iscritical
1424                         ? SLAP_CONTROL_CRITICAL
1425                         : SLAP_CONTROL_NONCRITICAL;
1426         }
1427
1428         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1429                 /* Other search flags not recognised so far,
1430                  * including:
1431                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1432                  */
1433                 rs->sr_text = "searchOptions contained unrecognized flag";
1434                 return LDAP_UNWILLING_TO_PERFORM;
1435         }
1436
1437         return LDAP_SUCCESS;
1438 }
1439