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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 #include "portable.h"
  17
  18 #include <stdio.h>
  19
  20 #include <ac/string.h>
  21 #include <ac/socket.h>
  22
  23 #include "slap.h"
  24
  25 #include "../../libraries/liblber/lber-int.h"
  26
  27 static SLAP_CTRL_PARSE_FN parseAssert;
  28 static SLAP_CTRL_PARSE_FN parsePreRead;
  29 static SLAP_CTRL_PARSE_FN parsePostRead;
  30 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  31 #ifdef LDAP_DEVEL
  32 static SLAP_CTRL_PARSE_FN parseDontUseCopy;
  33 static SLAP_CTRL_PARSE_FN parseManageDIT;
  34 #endif
  35 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  36 static SLAP_CTRL_PARSE_FN parseNoOp;
  37 static SLAP_CTRL_PARSE_FN parsePagedResults;
  38 #ifdef LDAP_DEVEL
  39 static SLAP_CTRL_PARSE_FN parseSortedResults;
  40 #endif
  41 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  42 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  43 static SLAP_CTRL_PARSE_FN parseDomainScope;
  44 #ifdef SLAP_CONTROL_X_TREE_DELETE
  45 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  46 #endif
  47 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  48 static SLAP_CTRL_PARSE_FN parseSubentries;
  49
  50 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  51
  52 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  53 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  54
  55 struct slap_control_ids slap_cids;
  56
  57 struct slap_control {
  58         /* Control OID */
  59         char *sc_oid;
  60
  61         /* The controlID for this control */
  62         int sc_cid;
  63
  64         /* Operations supported by control */
  65         slap_mask_t sc_mask;
  66
  67         /* Extended operations supported by control */
  68         char **sc_extendedops;          /* input */
  69         BerVarray sc_extendedopsbv;     /* run-time use */
  70
  71         /* Control parsing callback */
  72         SLAP_CTRL_PARSE_FN *sc_parse;
  73
  74         LDAP_SLIST_ENTRY(slap_control) sc_next;
  75 };
  76
  77 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  78         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  79
  80 /*
  81  * all known request control OIDs should be added to this list
  82  */
  83 /*
  84  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  85  * addresses an undefined control; this allows to safely test for
  86  * well known controls even if they are not registered, e.g. if
  87  * they get moved to modules.  An example is sc_LDAPsync, which
  88  * is implemented in the syncprov overlay and thus, if configured
  89  * as dynamic module, may not be registered.  One side effect is that
  90  * slap_known_controls[0] == NULL, so it should always be used
  91  * starting from 1.
  92  * FIXME: should we define the "undefined control" oid?
  93  */
  94 char *slap_known_controls[SLAP_MAX_CIDS+1];
  95 static int num_known_controls = 1;
  96
  97 static char *proxy_authz_extops[] = {
  98         LDAP_EXOP_MODIFY_PASSWD,
  99         LDAP_EXOP_X_WHO_AM_I,
 100         LDAP_EXOP_REFRESH,
 101         NULL
 102 };
 103
 104 static char *manageDSAit_extops[] = {
 105         LDAP_EXOP_REFRESH,
 106         NULL
 107 };
 108
 109 static struct slap_control control_defs[] = {
 110         {  LDAP_CONTROL_ASSERT,
 111                 (int)offsetof(struct slap_control_ids, sc_assert),
 112                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
 113                         SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
 114                 NULL, NULL,
 115                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 116         { LDAP_CONTROL_PRE_READ,
 117                 (int)offsetof(struct slap_control_ids, sc_preRead),
 118                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 119                 NULL, NULL,
 120                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 121         { LDAP_CONTROL_POST_READ,
 122                 (int)offsetof(struct slap_control_ids, sc_postRead),
 123                 SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 124                 NULL, NULL,
 125                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 126         { LDAP_CONTROL_VALUESRETURNFILTER,
 127                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 128                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH,
 129                 NULL, NULL,
 130                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 131 #ifdef LDAP_CONTROL_X_VALUESRETURNFILTER
 132         { LDAP_CONTROL_X_VALUESRETURNFILTER /* bad OID */,
 133                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 134                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 135                 NULL, NULL,
 136                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 137 #endif
 138         { LDAP_CONTROL_PAGEDRESULTS,
 139                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 140                 SLAP_CTRL_SEARCH,
 141                 NULL, NULL,
 142                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 143 #ifdef LDAP_DEVEL
 144         { LDAP_CONTROL_SORTREQUEST,
 145                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 146                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 147                 NULL, NULL,
 148                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 149 #endif
 150         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 151                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 152                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 153                 NULL, NULL,
 154                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 155         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 156                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 157                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
 158                 NULL, NULL,
 159                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 160 #ifdef SLAP_CONTROL_X_TREE_DELETE
 161         { LDAP_CONTROL_X_TREE_DELETE,
 162                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 163                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
 164                 NULL, NULL,
 165                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 166 #endif
 167         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 168                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 169                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 170                 NULL, NULL,
 171                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 172         { LDAP_CONTROL_SUBENTRIES,
 173                 (int)offsetof(struct slap_control_ids, sc_subentries),
 174                 SLAP_CTRL_SEARCH,
 175                 NULL, NULL,
 176                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 177         { LDAP_CONTROL_NOOP,
 178                 (int)offsetof(struct slap_control_ids, sc_noOp),
 179                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 180                 NULL, NULL,
 181                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 182 #ifdef LDAP_DEVEL
 183         { LDAP_CONTROL_DONTUSECOPY,
 184                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 185                 SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
 186                 NULL, NULL,
 187                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 188         { LDAP_CONTROL_MANAGEDIT,
 189                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 190                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 191                 NULL, NULL,
 192                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 193 #endif
 194         { LDAP_CONTROL_MANAGEDSAIT,
 195                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 196                 SLAP_CTRL_ACCESS,
 197                 manageDSAit_extops, NULL,
 198                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 199         { LDAP_CONTROL_PROXY_AUTHZ,
 200                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 201                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
 202                 proxy_authz_extops, NULL,
 203                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 204         { NULL, 0, 0, NULL, 0, NULL, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 205 };
 206
 207 static struct slap_control *
 208 find_ctrl( const char *oid );
 209
 210 /*
 211  * Register a supported control.
 212  *
 213  * This can be called by an OpenLDAP plugin or, indirectly, by a
 214  * SLAPI plugin calling slapi_register_supported_control().
 215  *
 216  * NOTE: if flags == 1 the control is replaced if already registered;
 217  * otherwise registering an already registered control is not allowed.
 218  */
 219 int
 220 register_supported_control2(const char *controloid,
 221         slap_mask_t controlmask,
 222         char **controlexops,
 223         SLAP_CTRL_PARSE_FN *controlparsefn,
 224         unsigned flags,
 225         int *controlcid)
 226 {
 227         struct slap_control *sc = NULL;
 228         int i;
 229         BerVarray extendedopsbv = NULL;
 230
 231         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 232                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 233                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 234                 SLAP_MAX_CIDS, 0, 0 );
 235                 return LDAP_OTHER;
 236         }
 237
 238         if ( controloid == NULL ) {
 239                 return LDAP_PARAM_ERROR;
 240         }
 241
 242         /* check if already registered */
 243         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 244                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 245                         if ( flags == 1 ) {
 246                                 Debug( LDAP_DEBUG_TRACE,
 247                                         "Control %s already registered; replacing.\n",
 248                                         controloid, 0, 0 );
 249                                 /* (find and) replace existing handler */
 250                                 sc = find_ctrl( controloid );
 251                                 assert( sc != NULL );
 252                                 break;
 253                         }
 254
 255                         Debug( LDAP_DEBUG_ANY,
 256                                 "Control %s already registered.\n",
 257                                 controloid, 0, 0 );
 258                         return LDAP_PARAM_ERROR;
 259                 }
 260         }
 261
 262         /* turn compatible extended operations into bervals */
 263         if ( controlexops != NULL ) {
 264                 int i;
 265
 266                 for ( i = 0; controlexops[ i ]; i++ );
 267
 268                 extendedopsbv = ber_memcalloc( i + 1, sizeof( struct berval ) );
 269                 if ( extendedopsbv == NULL ) {
 270                         return LDAP_NO_MEMORY;
 271                 }
 272
 273                 for ( i = 0; controlexops[ i ]; i++ ) {
 274                         ber_str2bv( controlexops[ i ], 0, 1, &extendedopsbv[ i ] );
 275                 }
 276         }
 277
 278         if ( sc == NULL ) {
 279                 sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 280                 if ( sc == NULL ) {
 281                         return LDAP_NO_MEMORY;
 282                 }
 283
 284                 sc->sc_oid = ch_strdup( controloid );
 285                 sc->sc_cid = num_known_controls;
 286
 287                 /* Update slap_known_controls, too. */
 288                 slap_known_controls[num_known_controls - 1] = sc->sc_oid;
 289                 slap_known_controls[num_known_controls++] = NULL;
 290
 291                 LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 292                 LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 293
 294         } else {
 295                 if ( sc->sc_extendedopsbv ) {
 296                         /* FIXME: in principle, we should rather merge
 297                          * existing extops with those supported by the
 298                          * new control handling implementation.
 299                          * In fact, whether a control is compatible with
 300                          * an extop should not be a matter of implementation.
 301                          * We likely also need a means for a newly
 302                          * registered extop to declare that it is
 303                          * comptible with an already registered control.
 304                          */
 305                         ber_bvarray_free( sc->sc_extendedopsbv );
 306                         sc->sc_extendedopsbv = NULL;
 307                         sc->sc_extendedops = NULL;
 308                 }
 309         }
 310
 311         sc->sc_extendedopsbv = extendedopsbv;
 312         sc->sc_mask = controlmask;
 313         sc->sc_parse = controlparsefn;
 314         if ( controlcid ) {
 315                 *controlcid = sc->sc_cid;
 316         }
 317
 318         return LDAP_SUCCESS;
 319 }
 320
 321 /*
 322  * One-time initialization of internal controls.
 323  */
 324 int
 325 slap_controls_init( void )
 326 {
 327         int i, rc;
 328
 329         rc = LDAP_SUCCESS;
 330
 331         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 332                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 333                 rc = register_supported_control( control_defs[i].sc_oid,
 334                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 335                         control_defs[i].sc_parse, cid );
 336                 if ( rc != LDAP_SUCCESS ) break;
 337         }
 338
 339         return rc;
 340 }
 341
 342 /*
 343  * Free memory associated with list of supported controls.
 344  */
 345 void
 346 controls_destroy( void )
 347 {
 348         struct slap_control *sc;
 349
 350         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 351                 sc = LDAP_SLIST_FIRST(&controls_list);
 352                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 353
 354                 ch_free( sc->sc_oid );
 355                 if ( sc->sc_extendedopsbv != NULL ) {
 356                         ber_bvarray_free( sc->sc_extendedopsbv );
 357                 }
 358                 ch_free( sc );
 359         }
 360 }
 361
 362 /*
 363  * Format the supportedControl attribute of the root DSE,
 364  * detailing which controls are supported by the directory
 365  * server.
 366  */
 367 int
 368 controls_root_dse_info( Entry *e )
 369 {
 370         AttributeDescription *ad_supportedControl
 371                 = slap_schema.si_ad_supportedControl;
 372         struct berval vals[2];
 373         struct slap_control *sc;
 374
 375         vals[1].bv_val = NULL;
 376         vals[1].bv_len = 0;
 377
 378         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 379                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 380
 381                 vals[0].bv_val = sc->sc_oid;
 382                 vals[0].bv_len = strlen( sc->sc_oid );
 383
 384                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 385                         return -1;
 386                 }
 387         }
 388
 389         return 0;
 390 }
 391
 392 /*
 393  * Return a list of OIDs and operation masks for supported
 394  * controls. Used by SLAPI.
 395  */
 396 int
 397 get_supported_controls(char ***ctrloidsp,
 398         slap_mask_t **ctrlmasks)
 399 {
 400         int n;
 401         char **oids;
 402         slap_mask_t *masks;
 403         struct slap_control *sc;
 404
 405         n = 0;
 406
 407         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 408                 n++;
 409         }
 410
 411         if ( n == 0 ) {
 412                 *ctrloidsp = NULL;
 413                 *ctrlmasks = NULL;
 414                 return LDAP_SUCCESS;
 415         }
 416
 417         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 418         if ( oids == NULL ) {
 419                 return LDAP_NO_MEMORY;
 420         }
 421         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 422         if  ( masks == NULL ) {
 423                 ch_free( oids );
 424                 return LDAP_NO_MEMORY;
 425         }
 426
 427         n = 0;
 428
 429         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 430                 oids[n] = ch_strdup( sc->sc_oid );
 431                 masks[n] = sc->sc_mask;
 432                 n++;
 433         }
 434         oids[n] = NULL;
 435         masks[n] = 0;
 436
 437         *ctrloidsp = oids;
 438         *ctrlmasks = masks;
 439
 440         return LDAP_SUCCESS;
 441 }
 442
 443 /*
 444  * Find a control given its OID.
 445  */
 446 static struct slap_control *
 447 find_ctrl( const char *oid )
 448 {
 449         struct slap_control *sc;
 450
 451         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 452                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 453                         return sc;
 454                 }
 455         }
 456
 457         return NULL;
 458 }
 459
 460 int
 461 slap_find_control_id(
 462         const char *oid,
 463         int *cid )
 464 {
 465         struct slap_control *ctrl = find_ctrl( oid );
 466         if ( ctrl ) {
 467                 if ( cid ) *cid = ctrl->sc_cid;
 468                 return LDAP_SUCCESS;
 469         }
 470         return LDAP_CONTROL_NOT_FOUND;
 471 }
 472
 473 int
 474 slap_global_control( Operation *op, const char *oid, int *cid )
 475 {
 476         struct slap_control *ctrl = find_ctrl( oid );
 477
 478         if ( ctrl == NULL ) {
 479                 /* should not be reachable */
 480                 Debug( LDAP_DEBUG_ANY,
 481                         "slap_global_control: unrecognized control: %s\n",
 482                         oid, 0, 0 );
 483                 return LDAP_CONTROL_NOT_FOUND;
 484         }
 485
 486         if ( cid ) *cid = ctrl->sc_cid;
 487
 488         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 489                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 490                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 491         {
 492                 return LDAP_COMPARE_TRUE;
 493         }
 494
 495         Debug( LDAP_DEBUG_TRACE,
 496                 "slap_global_control: unavailable control: %s\n",
 497                 oid, 0, 0 );
 498
 499         return LDAP_COMPARE_FALSE;
 500 }
 501
 502 void slap_free_ctrls(
 503         Operation *op,
 504         LDAPControl **ctrls )
 505 {
 506         int i;
 507
 508         for (i=0; ctrls[i]; i++) {
 509                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 510         }
 511         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 512 }
 513
 514 int slap_parse_ctrl(
 515         Operation *op,
 516         SlapReply *rs,
 517         LDAPControl *control,
 518         const char **text )
 519 {
 520         struct slap_control *sc;
 521
 522         sc = find_ctrl( control->ldctl_oid );
 523         if( sc != NULL ) {
 524                 /* recognized control */
 525                 slap_mask_t tagmask;
 526                 switch( op->o_tag ) {
 527                 case LDAP_REQ_ADD:
 528                         tagmask = SLAP_CTRL_ADD;
 529                         break;
 530                 case LDAP_REQ_BIND:
 531                         tagmask = SLAP_CTRL_BIND;
 532                         break;
 533                 case LDAP_REQ_COMPARE:
 534                         tagmask = SLAP_CTRL_COMPARE;
 535                         break;
 536                 case LDAP_REQ_DELETE:
 537                         tagmask = SLAP_CTRL_DELETE;
 538                         break;
 539                 case LDAP_REQ_MODIFY:
 540                         tagmask = SLAP_CTRL_MODIFY;
 541                         break;
 542                 case LDAP_REQ_RENAME:
 543                         tagmask = SLAP_CTRL_RENAME;
 544                         break;
 545                 case LDAP_REQ_SEARCH:
 546                         tagmask = SLAP_CTRL_SEARCH;
 547                         break;
 548                 case LDAP_REQ_UNBIND:
 549                         tagmask = SLAP_CTRL_UNBIND;
 550                         break;
 551                 case LDAP_REQ_ABANDON:
 552                         tagmask = SLAP_CTRL_ABANDON;
 553                         break;
 554                 case LDAP_REQ_EXTENDED:
 555                         tagmask=~0L;
 556                         assert( op->ore_reqoid.bv_val != NULL );
 557                         if( sc->sc_extendedopsbv != NULL ) {
 558                                 int i;
 559                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 560                                         if( bvmatch( &op->ore_reqoid,
 561                                                 &sc->sc_extendedopsbv[i] ) )
 562                                         {
 563                                                 tagmask=0L;
 564                                                 break;
 565                                         }
 566                                 }
 567                         }
 568                         break;
 569                 default:
 570                         *text = "controls internal error";
 571                         return LDAP_OTHER;
 572                 }
 573
 574                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 575                         /* available extension */
 576                         int     rc;
 577
 578                         if( !sc->sc_parse ) {
 579                                 *text = "not yet implemented";
 580                                 return LDAP_OTHER;
 581                         }
 582
 583                         rc = sc->sc_parse( op, rs, control );
 584                         if ( rc ) {
 585                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 586                                 return rc;
 587                         }
 588
 589                 } else if( control->ldctl_iscritical ) {
 590                         /* unavailable CRITICAL control */
 591                         *text = "critical extension is unavailable";
 592                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 593                 }
 594         } else if( control->ldctl_iscritical ) {
 595                 /* unrecognized CRITICAL control */
 596                 *text = "critical extension is not recognized";
 597                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 598         }
 599
 600         return LDAP_SUCCESS;
 601 }
 602
 603 int get_ctrls(
 604         Operation *op,
 605         SlapReply *rs,
 606         int sendres )
 607 {
 608         int nctrls = 0;
 609         ber_tag_t tag;
 610         ber_len_t len;
 611         char *opaque;
 612         BerElement *ber = op->o_ber;
 613         struct berval bv;
 614
 615         len = ber_pvt_ber_remaining(ber);
 616
 617         if( len == 0) {
 618                 /* no controls */
 619                 rs->sr_err = LDAP_SUCCESS;
 620                 return rs->sr_err;
 621         }
 622
 623         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 624                 if( tag == LBER_ERROR ) {
 625                         rs->sr_err = SLAPD_DISCONNECT;
 626                         rs->sr_text = "unexpected data in PDU";
 627                 }
 628
 629                 goto return_results;
 630         }
 631
 632         Debug( LDAP_DEBUG_TRACE,
 633                 "=> get_ctrls\n", 0, 0, 0 );
 634
 635         if( op->o_protocol < LDAP_VERSION3 ) {
 636                 rs->sr_err = SLAPD_DISCONNECT;
 637                 rs->sr_text = "controls require LDAPv3";
 638                 goto return_results;
 639         }
 640
 641         /* one for first control, one for termination */
 642         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 643
 644 #if 0
 645         if( op->ctrls == NULL ) {
 646                 rs->sr_err = LDAP_NO_MEMORY;
 647                 rs->sr_text = "no memory";
 648                 goto return_results;
 649         }
 650 #endif
 651
 652         op->o_ctrls[nctrls] = NULL;
 653
 654         /* step through each element */
 655         for( tag = ber_first_element( ber, &len, &opaque );
 656                 tag != LBER_ERROR;
 657                 tag = ber_next_element( ber, &len, opaque ) )
 658         {
 659                 LDAPControl *c;
 660                 LDAPControl **tctrls;
 661
 662                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 663                 memset(c, 0, sizeof(LDAPControl));
 664
 665                 /* allocate pointer space for current controls (nctrls)
 666                  * + this control + extra NULL
 667                  */
 668                 tctrls = op->o_tmprealloc( op->o_ctrls,
 669                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 670
 671 #if 0
 672                 if( tctrls == NULL ) {
 673                         ch_free( c );
 674                         ldap_controls_free(op->o_ctrls);
 675                         op->o_ctrls = NULL;
 676
 677                         rs->sr_err = LDAP_NO_MEMORY;
 678                         rs->sr_text = "no memory";
 679                         goto return_results;
 680                 }
 681 #endif
 682                 op->o_ctrls = tctrls;
 683
 684                 op->o_ctrls[nctrls++] = c;
 685                 op->o_ctrls[nctrls] = NULL;
 686
 687                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 688                 c->ldctl_oid = bv.bv_val;
 689
 690                 if( tag == LBER_ERROR ) {
 691                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 692                                 0, 0, 0 );
 693
 694                         slap_free_ctrls( op, op->o_ctrls );
 695                         op->o_ctrls = NULL;
 696                         rs->sr_err = SLAPD_DISCONNECT;
 697                         rs->sr_text = "decoding controls error";
 698                         goto return_results;
 699
 700                 } else if( c->ldctl_oid == NULL ) {
 701                         Debug( LDAP_DEBUG_TRACE,
 702                                 "get_ctrls: conn %lu got emtpy OID.\n",
 703                                 op->o_connid, 0, 0 );
 704
 705                         slap_free_ctrls( op, op->o_ctrls );
 706                         op->o_ctrls = NULL;
 707                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 708                         rs->sr_text = "OID field is empty";
 709                         goto return_results;
 710                 }
 711
 712                 tag = ber_peek_tag( ber, &len );
 713
 714                 if( tag == LBER_BOOLEAN ) {
 715                         ber_int_t crit;
 716                         tag = ber_scanf( ber, "b", &crit );
 717
 718                         if( tag == LBER_ERROR ) {
 719                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 720                                         0, 0, 0 );
 721                                 slap_free_ctrls( op, op->o_ctrls );
 722                                 op->o_ctrls = NULL;
 723                                 rs->sr_err = SLAPD_DISCONNECT;
 724                                 rs->sr_text = "decoding controls error";
 725                                 goto return_results;
 726                         }
 727
 728                         c->ldctl_iscritical = (crit != 0);
 729                         tag = ber_peek_tag( ber, &len );
 730                 }
 731
 732                 if( tag == LBER_OCTETSTRING ) {
 733                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 734
 735                         if( tag == LBER_ERROR ) {
 736                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 737                                         "%s (%scritical): get value failed.\n",
 738                                         op->o_connid, c->ldctl_oid,
 739                                         c->ldctl_iscritical ? "" : "non" );
 740                                 slap_free_ctrls( op, op->o_ctrls );
 741                                 op->o_ctrls = NULL;
 742                                 rs->sr_err = SLAPD_DISCONNECT;
 743                                 rs->sr_text = "decoding controls error";
 744                                 goto return_results;
 745                         }
 746                 }
 747
 748                 Debug( LDAP_DEBUG_TRACE,
 749                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 750                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 751
 752                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 753                 if ( rs->sr_err != LDAP_SUCCESS ) {
 754                         goto return_results;
 755                 }
 756         }
 757
 758 return_results:
 759         Debug( LDAP_DEBUG_TRACE,
 760                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 761                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 762
 763         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 764                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 765                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 766                         send_ldap_disconnect( op, rs );
 767                         rs->sr_err = SLAPD_DISCONNECT;
 768                 } else {
 769                         send_ldap_result( op, rs );
 770                 }
 771         }
 772
 773         return rs->sr_err;
 774 }
 775
 776 int
 777 slap_remove_control(
 778         Operation       *op,
 779         SlapReply       *rs,
 780         int             ctrl,
 781         BI_chk_controls fnc )
 782 {
 783         int             i, j;
 784
 785         switch ( op->o_ctrlflag[ ctrl ] ) {
 786         case SLAP_CONTROL_NONCRITICAL:
 787                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 788                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 789                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 790                         {
 791                                 j = i;
 792                         }
 793                 }
 794
 795                 if ( j == -1 ) {
 796                         rs->sr_err = LDAP_OTHER;
 797                         break;
 798                 }
 799
 800                 if ( fnc ) {
 801                         (void)fnc( op, rs );
 802                 }
 803
 804                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 805
 806                 if ( i > 1 ) {
 807                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 808                                 ( i - j ) * sizeof( LDAPControl * ) );
 809
 810                 } else {
 811                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 812                         op->o_ctrls = NULL;
 813                 }
 814
 815                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 816
 817                 Debug( LDAP_DEBUG_ANY, "%s: "
 818                         "non-critical control \"%s\" not supported; stripped.\n",
 819                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 820                 /* fall thru */
 821
 822         case SLAP_CONTROL_IGNORED:
 823         case SLAP_CONTROL_NONE:
 824                 rs->sr_err = SLAP_CB_CONTINUE;
 825                 break;
 826
 827         case SLAP_CONTROL_CRITICAL:
 828                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 829                 if ( fnc ) {
 830                         (void)fnc( op, rs );
 831                 }
 832                 Debug( LDAP_DEBUG_ANY, "%s: "
 833                         "critical control \"%s\" not supported.\n",
 834                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 835                 break;
 836
 837         default:
 838                 /* handle all cases! */
 839                 assert( 0 );
 840         }
 841
 842         return rs->sr_err;
 843 }
 844
 845 #ifdef LDAP_DEVEL
 846 static int parseDontUseCopy (
 847         Operation *op,
 848         SlapReply *rs,
 849         LDAPControl *ctrl )
 850 {
 851         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 852                 rs->sr_text = "dontUseCopy control specified multiple times";
 853                 return LDAP_PROTOCOL_ERROR;
 854         }
 855
 856         if ( ctrl->ldctl_value.bv_len ) {
 857                 rs->sr_text = "dontUseCopy control value not empty";
 858                 return LDAP_PROTOCOL_ERROR;
 859         }
 860
 861         if ( ctrl->ldctl_iscritical != SLAP_CONTROL_CRITICAL ) {
 862                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 863                 return LDAP_PROTOCOL_ERROR;
 864         }
 865
 866         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 867         return LDAP_SUCCESS;
 868 }
 869
 870 static int parseManageDIT (
 871         Operation *op,
 872         SlapReply *rs,
 873         LDAPControl *ctrl )
 874 {
 875         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 876                 rs->sr_text = "manageDIT control specified multiple times";
 877                 return LDAP_PROTOCOL_ERROR;
 878         }
 879
 880         if ( ctrl->ldctl_value.bv_len ) {
 881                 rs->sr_text = "manageDIT control value not empty";
 882                 return LDAP_PROTOCOL_ERROR;
 883         }
 884
 885         op->o_managedit = ctrl->ldctl_iscritical
 886                 ? SLAP_CONTROL_CRITICAL
 887                 : SLAP_CONTROL_NONCRITICAL;
 888
 889         return LDAP_SUCCESS;
 890 }
 891 #endif
 892
 893 static int parseManageDSAit (
 894         Operation *op,
 895         SlapReply *rs,
 896         LDAPControl *ctrl )
 897 {
 898         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 899                 rs->sr_text = "manageDSAit control specified multiple times";
 900                 return LDAP_PROTOCOL_ERROR;
 901         }
 902
 903         if ( ctrl->ldctl_value.bv_len ) {
 904                 rs->sr_text = "manageDSAit control value not empty";
 905                 return LDAP_PROTOCOL_ERROR;
 906         }
 907
 908         op->o_managedsait = ctrl->ldctl_iscritical
 909                 ? SLAP_CONTROL_CRITICAL
 910                 : SLAP_CONTROL_NONCRITICAL;
 911
 912         return LDAP_SUCCESS;
 913 }
 914
 915 static int parseProxyAuthz (
 916         Operation *op,
 917         SlapReply *rs,
 918         LDAPControl *ctrl )
 919 {
 920         int             rc;
 921         struct berval   dn = BER_BVNULL;
 922
 923         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 924                 rs->sr_text = "proxy authorization control specified multiple times";
 925                 return LDAP_PROTOCOL_ERROR;
 926         }
 927
 928         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
 929                 && BER_BVISEMPTY( &op->o_ndn ) )
 930         {
 931                 rs->sr_text = "anonymous proxied authorization not allowed";
 932                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 933         }
 934
 935         op->o_proxy_authz = ctrl->ldctl_iscritical
 936                 ? SLAP_CONTROL_CRITICAL
 937                 : SLAP_CONTROL_NONCRITICAL;
 938
 939         Debug( LDAP_DEBUG_ARGS,
 940                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 941                 op->o_connid,
 942                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 943                 0 );
 944
 945         if ( ctrl->ldctl_value.bv_len == 0 ) {
 946                 Debug( LDAP_DEBUG_TRACE,
 947                         "parseProxyAuthz: conn=%lu anonymous\n",
 948                         op->o_connid, 0, 0 );
 949
 950                 /* anonymous */
 951                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 952                         op->o_ndn.bv_val[ 0 ] = '\0';
 953                 }
 954                 op->o_ndn.bv_len = 0;
 955
 956                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 957                         op->o_dn.bv_val[ 0 ] = '\0';
 958                 }
 959                 op->o_dn.bv_len = 0;
 960
 961                 return LDAP_SUCCESS;
 962         }
 963
 964         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 965                         NULL, &dn, SLAP_GETDN_AUTHZID );
 966
 967         /* FIXME: empty DN in proxyAuthz control should be legal... */
 968         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 969                 if ( dn.bv_val ) {
 970                         ch_free( dn.bv_val );
 971                 }
 972                 rs->sr_text = "authzId mapping failed";
 973                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 974         }
 975
 976         Debug( LDAP_DEBUG_TRACE,
 977                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 978                 op->o_connid,
 979                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 980
 981         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 982
 983         if ( rc ) {
 984                 ch_free( dn.bv_val );
 985                 rs->sr_text = "not authorized to assume identity";
 986                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 987         }
 988
 989         ch_free( op->o_ndn.bv_val );
 990         ch_free( op->o_dn.bv_val );
 991
 992         /*
 993          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 994          * from now on op->o_dn is normalized
 995          */
 996         op->o_ndn = dn;
 997         ber_dupbv( &op->o_dn, &dn );
 998
 999
1000         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
1001             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
1002
1003         return LDAP_SUCCESS;
1004 }
1005
1006 static int parseNoOp (
1007         Operation *op,
1008         SlapReply *rs,
1009         LDAPControl *ctrl )
1010 {
1011         if ( op->o_noop != SLAP_CONTROL_NONE ) {
1012                 rs->sr_text = "noop control specified multiple times";
1013                 return LDAP_PROTOCOL_ERROR;
1014         }
1015
1016         if ( ctrl->ldctl_value.bv_len ) {
1017                 rs->sr_text = "noop control value not empty";
1018                 return LDAP_PROTOCOL_ERROR;
1019         }
1020
1021         op->o_noop = ctrl->ldctl_iscritical
1022                 ? SLAP_CONTROL_CRITICAL
1023                 : SLAP_CONTROL_NONCRITICAL;
1024
1025         return LDAP_SUCCESS;
1026 }
1027
1028 static int parsePagedResults (
1029         Operation *op,
1030         SlapReply *rs,
1031         LDAPControl *ctrl )
1032 {
1033         int             rc = LDAP_SUCCESS;
1034         ber_tag_t       tag;
1035         ber_int_t       size;
1036         BerElement      *ber;
1037         struct berval   cookie = BER_BVNULL;
1038         PagedResultsState       *ps;
1039
1040         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1041                 rs->sr_text = "paged results control specified multiple times";
1042                 return LDAP_PROTOCOL_ERROR;
1043         }
1044
1045         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1046                 rs->sr_text = "paged results control value is empty (or absent)";
1047                 return LDAP_PROTOCOL_ERROR;
1048         }
1049
1050         /* Parse the control value
1051          *      realSearchControlValue ::= SEQUENCE {
1052          *              size    INTEGER (0..maxInt),
1053          *                              -- requested page size from client
1054          *                              -- result set size estimate from server
1055          *              cookie  OCTET STRING
1056          * }
1057          */
1058         ber = ber_init( &ctrl->ldctl_value );
1059         if ( ber == NULL ) {
1060                 rs->sr_text = "internal error";
1061                 return LDAP_OTHER;
1062         }
1063
1064         tag = ber_scanf( ber, "{im}", &size, &cookie );
1065
1066         if ( tag == LBER_ERROR ) {
1067                 rs->sr_text = "paged results control could not be decoded";
1068                 rc = LDAP_PROTOCOL_ERROR;
1069                 goto done;
1070         }
1071
1072         if ( size < 0 ) {
1073                 rs->sr_text = "paged results control size invalid";
1074                 rc = LDAP_PROTOCOL_ERROR;
1075                 goto done;
1076         }
1077
1078         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1079         *ps = op->o_conn->c_pagedresults_state;
1080         ps->ps_size = size;
1081         op->o_pagedresults_state = ps;
1082
1083         /* NOTE: according to RFC 2696 3.:
1084
1085     If the page size is greater than or equal to the sizeLimit value, the
1086     server should ignore the control as the request can be satisfied in a
1087     single page.
1088
1089          * NOTE: this assumes that the op->ors_slimit be set
1090          * before the controls are parsed.
1091          */
1092
1093         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1094                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1095
1096         } else if ( ctrl->ldctl_iscritical ) {
1097                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1098
1099         } else {
1100                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1101         }
1102
1103 done:;
1104         (void)ber_free( ber, 1 );
1105         return rc;
1106 }
1107
1108 #ifdef LDAP_DEVEL
1109 static int parseSortedResults (
1110         Operation *op,
1111         SlapReply *rs,
1112         LDAPControl *ctrl )
1113 {
1114         int             rc = LDAP_SUCCESS;
1115
1116         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1117                 rs->sr_text = "sorted results control specified multiple times";
1118                 return LDAP_PROTOCOL_ERROR;
1119         }
1120
1121         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1122                 rs->sr_text = "sorted results control value is empty (or absent)";
1123                 return LDAP_PROTOCOL_ERROR;
1124         }
1125
1126         /* blow off parsing the value */
1127
1128         op->o_sortedresults = ctrl->ldctl_iscritical
1129                 ? SLAP_CONTROL_CRITICAL
1130                 : SLAP_CONTROL_NONCRITICAL;
1131
1132         return rc;
1133 }
1134 #endif
1135
1136 static int parseAssert (
1137         Operation *op,
1138         SlapReply *rs,
1139         LDAPControl *ctrl )
1140 {
1141         BerElement      *ber;
1142         struct berval   fstr = BER_BVNULL;
1143
1144         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1145                 rs->sr_text = "assert control specified multiple times";
1146                 return LDAP_PROTOCOL_ERROR;
1147         }
1148
1149         if ( ctrl->ldctl_value.bv_len == 0 ) {
1150                 rs->sr_text = "assert 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 = "assert control: internal error";
1157                 return LDAP_OTHER;
1158         }
1159
1160         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1161                 &rs->sr_text);
1162         if( rs->sr_err != LDAP_SUCCESS ) {
1163                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1164                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1165                         send_ldap_disconnect( op, rs );
1166                         rs->sr_err = SLAPD_DISCONNECT;
1167                 } else {
1168                         send_ldap_result( op, rs );
1169                 }
1170                 if( op->o_assertion != NULL ) {
1171                         filter_free_x( op, op->o_assertion );
1172                 }
1173                 return rs->sr_err;
1174         }
1175
1176 #ifdef LDAP_DEBUG
1177         filter2bv_x( op, op->o_assertion, &fstr );
1178
1179         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1180                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1181         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1182 #endif
1183
1184         op->o_assert = ctrl->ldctl_iscritical
1185                 ? SLAP_CONTROL_CRITICAL
1186                 : SLAP_CONTROL_NONCRITICAL;
1187
1188         rs->sr_err = LDAP_SUCCESS;
1189         return LDAP_SUCCESS;
1190 }
1191
1192 static int parsePreRead (
1193         Operation *op,
1194         SlapReply *rs,
1195         LDAPControl *ctrl )
1196 {
1197         ber_len_t siz, off, i;
1198         AttributeName *an = NULL;
1199         BerElement      *ber;
1200
1201         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1202                 rs->sr_text = "preread control specified multiple times";
1203                 return LDAP_PROTOCOL_ERROR;
1204         }
1205
1206         if ( ctrl->ldctl_value.bv_len == 0 ) {
1207                 rs->sr_text = "preread control value is empty (or absent)";
1208                 return LDAP_PROTOCOL_ERROR;
1209         }
1210
1211         ber = ber_init( &(ctrl->ldctl_value) );
1212         if (ber == NULL) {
1213                 rs->sr_text = "preread control: internal error";
1214                 return LDAP_OTHER;
1215         }
1216
1217         siz = sizeof( AttributeName );
1218         off = offsetof( AttributeName, an_name );
1219         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1220                 rs->sr_text = "preread control: decoding error";
1221                 return LDAP_PROTOCOL_ERROR;
1222         }
1223
1224         for( i=0; i<siz; i++ ) {
1225                 int             rc = LDAP_SUCCESS;
1226                 const char      *dummy = NULL;
1227
1228                 an[i].an_desc = NULL;
1229                 an[i].an_oc = NULL;
1230                 an[i].an_oc_exclude = 0;
1231                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1232                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1233                         rs->sr_text = dummy
1234                                 ? dummy
1235                                 : "postread control: unknown attributeType";
1236                         return rc;
1237                 }
1238         }
1239
1240         op->o_preread = ctrl->ldctl_iscritical
1241                 ? SLAP_CONTROL_CRITICAL
1242                 : SLAP_CONTROL_NONCRITICAL;
1243
1244         op->o_preread_attrs = an;
1245
1246         rs->sr_err = LDAP_SUCCESS;
1247         return LDAP_SUCCESS;
1248 }
1249
1250 static int parsePostRead (
1251         Operation *op,
1252         SlapReply *rs,
1253         LDAPControl *ctrl )
1254 {
1255         ber_len_t siz, off, i;
1256         AttributeName *an = NULL;
1257         BerElement      *ber;
1258
1259         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1260                 rs->sr_text = "postread control specified multiple times";
1261                 return LDAP_PROTOCOL_ERROR;
1262         }
1263
1264         if ( ctrl->ldctl_value.bv_len == 0 ) {
1265                 rs->sr_text = "postread control value is empty (or absent)";
1266                 return LDAP_PROTOCOL_ERROR;
1267         }
1268
1269         ber = ber_init( &(ctrl->ldctl_value) );
1270         if (ber == NULL) {
1271                 rs->sr_text = "postread control: internal error";
1272                 return LDAP_OTHER;
1273         }
1274
1275         siz = sizeof( AttributeName );
1276         off = offsetof( AttributeName, an_name );
1277         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1278                 rs->sr_text = "postread control: decoding error";
1279                 return LDAP_PROTOCOL_ERROR;
1280         }
1281
1282         for( i=0; i<siz; i++ ) {
1283                 int             rc = LDAP_SUCCESS;
1284                 const char      *dummy = NULL;
1285
1286                 an[i].an_desc = NULL;
1287                 an[i].an_oc = NULL;
1288                 an[i].an_oc_exclude = 0;
1289                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1290                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1291                         rs->sr_text = dummy
1292                                 ? dummy
1293                                 : "postread control: unknown attributeType";
1294                         return rc;
1295                 }
1296         }
1297
1298         op->o_postread = ctrl->ldctl_iscritical
1299                 ? SLAP_CONTROL_CRITICAL
1300                 : SLAP_CONTROL_NONCRITICAL;
1301
1302         op->o_postread_attrs = an;
1303
1304         rs->sr_err = LDAP_SUCCESS;
1305         return LDAP_SUCCESS;
1306 }
1307
1308 static int parseValuesReturnFilter (
1309         Operation *op,
1310         SlapReply *rs,
1311         LDAPControl *ctrl )
1312 {
1313         BerElement      *ber;
1314         struct berval   fstr = BER_BVNULL;
1315
1316         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1317                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1318                 return LDAP_PROTOCOL_ERROR;
1319         }
1320
1321         if ( ctrl->ldctl_value.bv_len == 0 ) {
1322                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1323                 return LDAP_PROTOCOL_ERROR;
1324         }
1325
1326         ber = ber_init( &(ctrl->ldctl_value) );
1327         if (ber == NULL) {
1328                 rs->sr_text = "internal error";
1329                 return LDAP_OTHER;
1330         }
1331
1332         rs->sr_err = get_vrFilter( op, ber,
1333                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1334
1335         if( rs->sr_err != LDAP_SUCCESS ) {
1336                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1337                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1338                         send_ldap_disconnect( op, rs );
1339                         rs->sr_err = SLAPD_DISCONNECT;
1340                 } else {
1341                         send_ldap_result( op, rs );
1342                 }
1343                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1344         }
1345 #ifdef LDAP_DEBUG
1346         else {
1347                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1348         }
1349
1350         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1351                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1352         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1353 #endif
1354
1355         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1356                 ? SLAP_CONTROL_CRITICAL
1357                 : SLAP_CONTROL_NONCRITICAL;
1358
1359         rs->sr_err = LDAP_SUCCESS;
1360         return LDAP_SUCCESS;
1361 }
1362
1363 static int parseSubentries (
1364         Operation *op,
1365         SlapReply *rs,
1366         LDAPControl *ctrl )
1367 {
1368         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1369                 rs->sr_text = "subentries control specified multiple times";
1370                 return LDAP_PROTOCOL_ERROR;
1371         }
1372
1373         /* FIXME: should use BER library */
1374         if( ( ctrl->ldctl_value.bv_len != 3 )
1375                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1376                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1377         {
1378                 rs->sr_text = "subentries control value encoding is bogus";
1379                 return LDAP_PROTOCOL_ERROR;
1380         }
1381
1382         op->o_subentries = ctrl->ldctl_iscritical
1383                 ? SLAP_CONTROL_CRITICAL
1384                 : SLAP_CONTROL_NONCRITICAL;
1385
1386         if (ctrl->ldctl_value.bv_val[2]) {
1387                 set_subentries_visibility( op );
1388         }
1389
1390         return LDAP_SUCCESS;
1391 }
1392
1393 static int parsePermissiveModify (
1394         Operation *op,
1395         SlapReply *rs,
1396         LDAPControl *ctrl )
1397 {
1398         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1399                 rs->sr_text = "permissiveModify control specified multiple times";
1400                 return LDAP_PROTOCOL_ERROR;
1401         }
1402
1403         if ( ctrl->ldctl_value.bv_len ) {
1404                 rs->sr_text = "permissiveModify control value not empty";
1405                 return LDAP_PROTOCOL_ERROR;
1406         }
1407
1408         op->o_permissive_modify = ctrl->ldctl_iscritical
1409                 ? SLAP_CONTROL_CRITICAL
1410                 : SLAP_CONTROL_NONCRITICAL;
1411
1412         return LDAP_SUCCESS;
1413 }
1414
1415 static int parseDomainScope (
1416         Operation *op,
1417         SlapReply *rs,
1418         LDAPControl *ctrl )
1419 {
1420         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1421                 rs->sr_text = "domainScope control specified multiple times";
1422                 return LDAP_PROTOCOL_ERROR;
1423         }
1424
1425         if ( ctrl->ldctl_value.bv_len ) {
1426                 rs->sr_text = "domainScope control value not empty";
1427                 return LDAP_PROTOCOL_ERROR;
1428         }
1429
1430         op->o_domain_scope = ctrl->ldctl_iscritical
1431                 ? SLAP_CONTROL_CRITICAL
1432                 : SLAP_CONTROL_NONCRITICAL;
1433
1434         return LDAP_SUCCESS;
1435 }
1436
1437 #ifdef SLAP_CONTROL_X_TREE_DELETE
1438 static int parseTreeDelete (
1439         Operation *op,
1440         SlapReply *rs,
1441         LDAPControl *ctrl )
1442 {
1443         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1444                 rs->sr_text = "treeDelete control specified multiple times";
1445                 return LDAP_PROTOCOL_ERROR;
1446         }
1447
1448         if ( ctrl->ldctl_value.bv_len ) {
1449                 rs->sr_text = "treeDelete control value not empty";
1450                 return LDAP_PROTOCOL_ERROR;
1451         }
1452
1453         op->o_tree_delete = ctrl->ldctl_iscritical
1454                 ? SLAP_CONTROL_CRITICAL
1455                 : SLAP_CONTROL_NONCRITICAL;
1456
1457         return LDAP_SUCCESS;
1458 }
1459 #endif
1460
1461 static int parseSearchOptions (
1462         Operation *op,
1463         SlapReply *rs,
1464         LDAPControl *ctrl )
1465 {
1466         BerElement *ber;
1467         ber_int_t search_flags;
1468         ber_tag_t tag;
1469
1470         if ( ctrl->ldctl_value.bv_len == 0 ) {
1471                 rs->sr_text = "searchOptions control value is empty (or absent)";
1472                 return LDAP_PROTOCOL_ERROR;
1473         }
1474
1475         ber = ber_init( &ctrl->ldctl_value );
1476         if( ber == NULL ) {
1477                 rs->sr_text = "internal error";
1478                 return LDAP_OTHER;
1479         }
1480
1481         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1482                 rs->sr_text = "searchOptions control decoding error";
1483                 return LDAP_PROTOCOL_ERROR;
1484         }
1485
1486         (void) ber_free( ber, 1 );
1487
1488         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1489                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1490                         rs->sr_text = "searchOptions control specified multiple times "
1491                                 "or with domainScope control";
1492                         return LDAP_PROTOCOL_ERROR;
1493                 }
1494
1495                 op->o_domain_scope = ctrl->ldctl_iscritical
1496                         ? SLAP_CONTROL_CRITICAL
1497                         : SLAP_CONTROL_NONCRITICAL;
1498         }
1499
1500         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1501                 /* Other search flags not recognised so far,
1502                  * including:
1503                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1504                  */
1505                 rs->sr_text = "searchOptions contained unrecognized flag";
1506                 return LDAP_UNWILLING_TO_PERFORM;
1507         }
1508
1509         return LDAP_SUCCESS;
1510 }
1511