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_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         { LDAP_CONTROL_PAGEDRESULTS,
 132                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 133                 SLAP_CTRL_SEARCH,
 134                 NULL, NULL,
 135                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 136 #ifdef LDAP_DEVEL
 137         { LDAP_CONTROL_SORTREQUEST,
 138                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 139                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 140                 NULL, NULL,
 141                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 142 #endif
 143         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 144                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 145                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 146                 NULL, NULL,
 147                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 148         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 149                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 150                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
 151                 NULL, NULL,
 152                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 153 #ifdef SLAP_CONTROL_X_TREE_DELETE
 154         { LDAP_CONTROL_X_TREE_DELETE,
 155                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 156                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
 157                 NULL, NULL,
 158                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 159 #endif
 160         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 161                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 162                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 163                 NULL, NULL,
 164                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 165         { LDAP_CONTROL_SUBENTRIES,
 166                 (int)offsetof(struct slap_control_ids, sc_subentries),
 167                 SLAP_CTRL_SEARCH,
 168                 NULL, NULL,
 169                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 170         { LDAP_CONTROL_NOOP,
 171                 (int)offsetof(struct slap_control_ids, sc_noOp),
 172                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 173                 NULL, NULL,
 174                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 175 #ifdef LDAP_DEVEL
 176         { LDAP_CONTROL_DONTUSECOPY,
 177                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 178                 SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
 179                 NULL, NULL,
 180                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 181         { LDAP_CONTROL_MANAGEDIT,
 182                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 183                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 184                 NULL, NULL,
 185                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 186 #endif
 187 #ifdef LDAP_X_TXN
 188         { LDAP_CONTROL_X_TXN_SPEC,
 189                 (int)offsetof(struct slap_control_ids, sc_txnSpec),
 190                 SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 191                 NULL, NULL,
 192                 txn_spec_ctrl, 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                 SLAP_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 #if 0
 496         Debug( LDAP_DEBUG_TRACE,
 497                 "slap_global_control: unavailable control: %s\n",
 498                 oid, 0, 0 );
 499 #endif
 500
 501         return LDAP_COMPARE_FALSE;
 502 }
 503
 504 void slap_free_ctrls(
 505         Operation *op,
 506         LDAPControl **ctrls )
 507 {
 508         int i;
 509
 510         for (i=0; ctrls[i]; i++) {
 511                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 512         }
 513         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 514 }
 515
 516 int slap_parse_ctrl(
 517         Operation *op,
 518         SlapReply *rs,
 519         LDAPControl *control,
 520         const char **text )
 521 {
 522         struct slap_control *sc;
 523
 524         sc = find_ctrl( control->ldctl_oid );
 525         if( sc != NULL ) {
 526                 /* recognized control */
 527                 slap_mask_t tagmask;
 528                 switch( op->o_tag ) {
 529                 case LDAP_REQ_ADD:
 530                         tagmask = SLAP_CTRL_ADD;
 531                         break;
 532                 case LDAP_REQ_BIND:
 533                         tagmask = SLAP_CTRL_BIND;
 534                         break;
 535                 case LDAP_REQ_COMPARE:
 536                         tagmask = SLAP_CTRL_COMPARE;
 537                         break;
 538                 case LDAP_REQ_DELETE:
 539                         tagmask = SLAP_CTRL_DELETE;
 540                         break;
 541                 case LDAP_REQ_MODIFY:
 542                         tagmask = SLAP_CTRL_MODIFY;
 543                         break;
 544                 case LDAP_REQ_RENAME:
 545                         tagmask = SLAP_CTRL_RENAME;
 546                         break;
 547                 case LDAP_REQ_SEARCH:
 548                         tagmask = SLAP_CTRL_SEARCH;
 549                         break;
 550                 case LDAP_REQ_UNBIND:
 551                         tagmask = SLAP_CTRL_UNBIND;
 552                         break;
 553                 case LDAP_REQ_ABANDON:
 554                         tagmask = SLAP_CTRL_ABANDON;
 555                         break;
 556                 case LDAP_REQ_EXTENDED:
 557                         tagmask=~0L;
 558                         assert( op->ore_reqoid.bv_val != NULL );
 559                         if( sc->sc_extendedopsbv != NULL ) {
 560                                 int i;
 561                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 562                                         if( bvmatch( &op->ore_reqoid,
 563                                                 &sc->sc_extendedopsbv[i] ) )
 564                                         {
 565                                                 tagmask=0L;
 566                                                 break;
 567                                         }
 568                                 }
 569                         }
 570                         break;
 571                 default:
 572                         *text = "controls internal error";
 573                         return LDAP_OTHER;
 574                 }
 575
 576                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 577                         /* available extension */
 578                         int     rc;
 579
 580                         if( !sc->sc_parse ) {
 581                                 *text = "not yet implemented";
 582                                 return LDAP_OTHER;
 583                         }
 584
 585                         rc = sc->sc_parse( op, rs, control );
 586                         if ( rc ) {
 587                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 588                                 return rc;
 589                         }
 590
 591                 } else if( control->ldctl_iscritical ) {
 592                         /* unavailable CRITICAL control */
 593                         *text = "critical extension is unavailable";
 594                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 595                 }
 596         } else if( control->ldctl_iscritical ) {
 597                 /* unrecognized CRITICAL control */
 598                 *text = "critical extension is not recognized";
 599                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 600         }
 601
 602         return LDAP_SUCCESS;
 603 }
 604
 605 int get_ctrls(
 606         Operation *op,
 607         SlapReply *rs,
 608         int sendres )
 609 {
 610         int nctrls = 0;
 611         ber_tag_t tag;
 612         ber_len_t len;
 613         char *opaque;
 614         BerElement *ber = op->o_ber;
 615         struct berval bv;
 616
 617         len = ber_pvt_ber_remaining(ber);
 618
 619         if( len == 0) {
 620                 /* no controls */
 621                 rs->sr_err = LDAP_SUCCESS;
 622                 return rs->sr_err;
 623         }
 624
 625         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 626                 if( tag == LBER_ERROR ) {
 627                         rs->sr_err = SLAPD_DISCONNECT;
 628                         rs->sr_text = "unexpected data in PDU";
 629                 }
 630
 631                 goto return_results;
 632         }
 633
 634         Debug( LDAP_DEBUG_TRACE,
 635                 "=> get_ctrls\n", 0, 0, 0 );
 636
 637         if( op->o_protocol < LDAP_VERSION3 ) {
 638                 rs->sr_err = SLAPD_DISCONNECT;
 639                 rs->sr_text = "controls require LDAPv3";
 640                 goto return_results;
 641         }
 642
 643         /* one for first control, one for termination */
 644         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 645
 646 #if 0
 647         if( op->ctrls == NULL ) {
 648                 rs->sr_err = LDAP_NO_MEMORY;
 649                 rs->sr_text = "no memory";
 650                 goto return_results;
 651         }
 652 #endif
 653
 654         op->o_ctrls[nctrls] = NULL;
 655
 656         /* step through each element */
 657         for( tag = ber_first_element( ber, &len, &opaque );
 658                 tag != LBER_ERROR;
 659                 tag = ber_next_element( ber, &len, opaque ) )
 660         {
 661                 LDAPControl *c;
 662                 LDAPControl **tctrls;
 663
 664                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 665                 memset(c, 0, sizeof(LDAPControl));
 666
 667                 /* allocate pointer space for current controls (nctrls)
 668                  * + this control + extra NULL
 669                  */
 670                 tctrls = op->o_tmprealloc( op->o_ctrls,
 671                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 672
 673 #if 0
 674                 if( tctrls == NULL ) {
 675                         ch_free( c );
 676                         ldap_controls_free(op->o_ctrls);
 677                         op->o_ctrls = NULL;
 678
 679                         rs->sr_err = LDAP_NO_MEMORY;
 680                         rs->sr_text = "no memory";
 681                         goto return_results;
 682                 }
 683 #endif
 684                 op->o_ctrls = tctrls;
 685
 686                 op->o_ctrls[nctrls++] = c;
 687                 op->o_ctrls[nctrls] = NULL;
 688
 689                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 690                 c->ldctl_oid = bv.bv_val;
 691
 692                 if( tag == LBER_ERROR ) {
 693                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 694                                 0, 0, 0 );
 695
 696                         slap_free_ctrls( op, op->o_ctrls );
 697                         op->o_ctrls = NULL;
 698                         rs->sr_err = SLAPD_DISCONNECT;
 699                         rs->sr_text = "decoding controls error";
 700                         goto return_results;
 701
 702                 } else if( c->ldctl_oid == NULL ) {
 703                         Debug( LDAP_DEBUG_TRACE,
 704                                 "get_ctrls: conn %lu got emtpy OID.\n",
 705                                 op->o_connid, 0, 0 );
 706
 707                         slap_free_ctrls( op, op->o_ctrls );
 708                         op->o_ctrls = NULL;
 709                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 710                         rs->sr_text = "OID field is empty";
 711                         goto return_results;
 712                 }
 713
 714                 tag = ber_peek_tag( ber, &len );
 715
 716                 if( tag == LBER_BOOLEAN ) {
 717                         ber_int_t crit;
 718                         tag = ber_scanf( ber, "b", &crit );
 719
 720                         if( tag == LBER_ERROR ) {
 721                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 722                                         0, 0, 0 );
 723                                 slap_free_ctrls( op, op->o_ctrls );
 724                                 op->o_ctrls = NULL;
 725                                 rs->sr_err = SLAPD_DISCONNECT;
 726                                 rs->sr_text = "decoding controls error";
 727                                 goto return_results;
 728                         }
 729
 730                         c->ldctl_iscritical = (crit != 0);
 731                         tag = ber_peek_tag( ber, &len );
 732                 }
 733
 734                 if( tag == LBER_OCTETSTRING ) {
 735                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 736
 737                         if( tag == LBER_ERROR ) {
 738                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 739                                         "%s (%scritical): get value failed.\n",
 740                                         op->o_connid, c->ldctl_oid,
 741                                         c->ldctl_iscritical ? "" : "non" );
 742                                 slap_free_ctrls( op, op->o_ctrls );
 743                                 op->o_ctrls = NULL;
 744                                 rs->sr_err = SLAPD_DISCONNECT;
 745                                 rs->sr_text = "decoding controls error";
 746                                 goto return_results;
 747                         }
 748                 }
 749
 750                 Debug( LDAP_DEBUG_TRACE,
 751                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 752                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 753
 754                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 755                 if ( rs->sr_err != LDAP_SUCCESS ) {
 756                         goto return_results;
 757                 }
 758         }
 759
 760 return_results:
 761         Debug( LDAP_DEBUG_TRACE,
 762                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 763                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 764
 765         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 766                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 767                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 768                         send_ldap_disconnect( op, rs );
 769                         rs->sr_err = SLAPD_DISCONNECT;
 770                 } else {
 771                         send_ldap_result( op, rs );
 772                 }
 773         }
 774
 775         return rs->sr_err;
 776 }
 777
 778 int
 779 slap_remove_control(
 780         Operation       *op,
 781         SlapReply       *rs,
 782         int             ctrl,
 783         BI_chk_controls fnc )
 784 {
 785         int             i, j;
 786
 787         switch ( op->o_ctrlflag[ ctrl ] ) {
 788         case SLAP_CONTROL_NONCRITICAL:
 789                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 790                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 791                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 792                         {
 793                                 j = i;
 794                         }
 795                 }
 796
 797                 if ( j == -1 ) {
 798                         rs->sr_err = LDAP_OTHER;
 799                         break;
 800                 }
 801
 802                 if ( fnc ) {
 803                         (void)fnc( op, rs );
 804                 }
 805
 806                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 807
 808                 if ( i > 1 ) {
 809                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 810                                 ( i - j ) * sizeof( LDAPControl * ) );
 811
 812                 } else {
 813                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 814                         op->o_ctrls = NULL;
 815                 }
 816
 817                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 818
 819                 Debug( LDAP_DEBUG_ANY, "%s: "
 820                         "non-critical control \"%s\" not supported; stripped.\n",
 821                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 822                 /* fall thru */
 823
 824         case SLAP_CONTROL_IGNORED:
 825         case SLAP_CONTROL_NONE:
 826                 rs->sr_err = SLAP_CB_CONTINUE;
 827                 break;
 828
 829         case SLAP_CONTROL_CRITICAL:
 830                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 831                 if ( fnc ) {
 832                         (void)fnc( op, rs );
 833                 }
 834                 Debug( LDAP_DEBUG_ANY, "%s: "
 835                         "critical control \"%s\" not supported.\n",
 836                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 837                 break;
 838
 839         default:
 840                 /* handle all cases! */
 841                 assert( 0 );
 842         }
 843
 844         return rs->sr_err;
 845 }
 846
 847 #ifdef LDAP_DEVEL
 848 static int parseDontUseCopy (
 849         Operation *op,
 850         SlapReply *rs,
 851         LDAPControl *ctrl )
 852 {
 853         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 854                 rs->sr_text = "dontUseCopy control specified multiple times";
 855                 return LDAP_PROTOCOL_ERROR;
 856         }
 857
 858         if ( ctrl->ldctl_value.bv_len ) {
 859                 rs->sr_text = "dontUseCopy control value not empty";
 860                 return LDAP_PROTOCOL_ERROR;
 861         }
 862
 863         if ( ctrl->ldctl_iscritical != SLAP_CONTROL_CRITICAL ) {
 864                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 865                 return LDAP_PROTOCOL_ERROR;
 866         }
 867
 868         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 869         return LDAP_SUCCESS;
 870 }
 871
 872 static int parseManageDIT (
 873         Operation *op,
 874         SlapReply *rs,
 875         LDAPControl *ctrl )
 876 {
 877         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 878                 rs->sr_text = "manageDIT control specified multiple times";
 879                 return LDAP_PROTOCOL_ERROR;
 880         }
 881
 882         if ( ctrl->ldctl_value.bv_len ) {
 883                 rs->sr_text = "manageDIT control value not empty";
 884                 return LDAP_PROTOCOL_ERROR;
 885         }
 886
 887         op->o_managedit = ctrl->ldctl_iscritical
 888                 ? SLAP_CONTROL_CRITICAL
 889                 : SLAP_CONTROL_NONCRITICAL;
 890
 891         return LDAP_SUCCESS;
 892 }
 893 #endif
 894
 895 static int parseManageDSAit (
 896         Operation *op,
 897         SlapReply *rs,
 898         LDAPControl *ctrl )
 899 {
 900         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 901                 rs->sr_text = "manageDSAit control specified multiple times";
 902                 return LDAP_PROTOCOL_ERROR;
 903         }
 904
 905         if ( ctrl->ldctl_value.bv_len ) {
 906                 rs->sr_text = "manageDSAit control value not empty";
 907                 return LDAP_PROTOCOL_ERROR;
 908         }
 909
 910         op->o_managedsait = ctrl->ldctl_iscritical
 911                 ? SLAP_CONTROL_CRITICAL
 912                 : SLAP_CONTROL_NONCRITICAL;
 913
 914         return LDAP_SUCCESS;
 915 }
 916
 917 static int parseProxyAuthz (
 918         Operation *op,
 919         SlapReply *rs,
 920         LDAPControl *ctrl )
 921 {
 922         int             rc;
 923         struct berval   dn = BER_BVNULL;
 924
 925         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 926                 rs->sr_text = "proxy authorization control specified multiple times";
 927                 return LDAP_PROTOCOL_ERROR;
 928         }
 929
 930         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
 931                 && BER_BVISEMPTY( &op->o_ndn ) )
 932         {
 933                 rs->sr_text = "anonymous proxied authorization not allowed";
 934                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 935         }
 936
 937         op->o_proxy_authz = ctrl->ldctl_iscritical
 938                 ? SLAP_CONTROL_CRITICAL
 939                 : SLAP_CONTROL_NONCRITICAL;
 940
 941         Debug( LDAP_DEBUG_ARGS,
 942                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 943                 op->o_connid,
 944                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 945                 0 );
 946
 947         if ( ctrl->ldctl_value.bv_len == 0 ) {
 948                 Debug( LDAP_DEBUG_TRACE,
 949                         "parseProxyAuthz: conn=%lu anonymous\n",
 950                         op->o_connid, 0, 0 );
 951
 952                 /* anonymous */
 953                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 954                         op->o_ndn.bv_val[ 0 ] = '\0';
 955                 }
 956                 op->o_ndn.bv_len = 0;
 957
 958                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 959                         op->o_dn.bv_val[ 0 ] = '\0';
 960                 }
 961                 op->o_dn.bv_len = 0;
 962
 963                 return LDAP_SUCCESS;
 964         }
 965
 966         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 967                         NULL, &dn, SLAP_GETDN_AUTHZID );
 968
 969         /* FIXME: empty DN in proxyAuthz control should be legal... */
 970         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 971                 if ( dn.bv_val ) {
 972                         ch_free( dn.bv_val );
 973                 }
 974                 rs->sr_text = "authzId mapping failed";
 975                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 976         }
 977
 978         Debug( LDAP_DEBUG_TRACE,
 979                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 980                 op->o_connid,
 981                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 982
 983         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 984
 985         if ( rc ) {
 986                 ch_free( dn.bv_val );
 987                 rs->sr_text = "not authorized to assume identity";
 988                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 989         }
 990
 991         ch_free( op->o_ndn.bv_val );
 992         ch_free( op->o_dn.bv_val );
 993
 994         /*
 995          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 996          * from now on op->o_dn is normalized
 997          */
 998         op->o_ndn = dn;
 999         ber_dupbv( &op->o_dn, &dn );
1000
1001
1002         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
1003             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
1004
1005         return LDAP_SUCCESS;
1006 }
1007
1008 static int parseNoOp (
1009         Operation *op,
1010         SlapReply *rs,
1011         LDAPControl *ctrl )
1012 {
1013         if ( op->o_noop != SLAP_CONTROL_NONE ) {
1014                 rs->sr_text = "noop control specified multiple times";
1015                 return LDAP_PROTOCOL_ERROR;
1016         }
1017
1018         if ( ctrl->ldctl_value.bv_len ) {
1019                 rs->sr_text = "noop control value not empty";
1020                 return LDAP_PROTOCOL_ERROR;
1021         }
1022
1023         op->o_noop = ctrl->ldctl_iscritical
1024                 ? SLAP_CONTROL_CRITICAL
1025                 : SLAP_CONTROL_NONCRITICAL;
1026
1027         return LDAP_SUCCESS;
1028 }
1029
1030 static int parsePagedResults (
1031         Operation *op,
1032         SlapReply *rs,
1033         LDAPControl *ctrl )
1034 {
1035         int             rc = LDAP_SUCCESS;
1036         ber_tag_t       tag;
1037         ber_int_t       size;
1038         BerElement      *ber;
1039         struct berval   cookie = BER_BVNULL;
1040         PagedResultsState       *ps;
1041
1042         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1043                 rs->sr_text = "paged results control specified multiple times";
1044                 return LDAP_PROTOCOL_ERROR;
1045         }
1046
1047         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1048                 rs->sr_text = "paged results control value is empty (or absent)";
1049                 return LDAP_PROTOCOL_ERROR;
1050         }
1051
1052         /* Parse the control value
1053          *      realSearchControlValue ::= SEQUENCE {
1054          *              size    INTEGER (0..maxInt),
1055          *                              -- requested page size from client
1056          *                              -- result set size estimate from server
1057          *              cookie  OCTET STRING
1058          * }
1059          */
1060         ber = ber_init( &ctrl->ldctl_value );
1061         if ( ber == NULL ) {
1062                 rs->sr_text = "internal error";
1063                 return LDAP_OTHER;
1064         }
1065
1066         tag = ber_scanf( ber, "{im}", &size, &cookie );
1067
1068         if ( tag == LBER_ERROR ) {
1069                 rs->sr_text = "paged results control could not be decoded";
1070                 rc = LDAP_PROTOCOL_ERROR;
1071                 goto done;
1072         }
1073
1074         if ( size < 0 ) {
1075                 rs->sr_text = "paged results control size invalid";
1076                 rc = LDAP_PROTOCOL_ERROR;
1077                 goto done;
1078         }
1079
1080         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1081         *ps = op->o_conn->c_pagedresults_state;
1082         ps->ps_size = size;
1083         op->o_pagedresults_state = ps;
1084
1085         /* NOTE: according to RFC 2696 3.:
1086
1087     If the page size is greater than or equal to the sizeLimit value, the
1088     server should ignore the control as the request can be satisfied in a
1089     single page.
1090
1091          * NOTE: this assumes that the op->ors_slimit be set
1092          * before the controls are parsed.
1093          */
1094
1095         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1096                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1097
1098         } else if ( ctrl->ldctl_iscritical ) {
1099                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1100
1101         } else {
1102                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1103         }
1104
1105 done:;
1106         (void)ber_free( ber, 1 );
1107         return rc;
1108 }
1109
1110 #ifdef LDAP_DEVEL
1111 static int parseSortedResults (
1112         Operation *op,
1113         SlapReply *rs,
1114         LDAPControl *ctrl )
1115 {
1116         int             rc = LDAP_SUCCESS;
1117
1118         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1119                 rs->sr_text = "sorted results control specified multiple times";
1120                 return LDAP_PROTOCOL_ERROR;
1121         }
1122
1123         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1124                 rs->sr_text = "sorted results control value is empty (or absent)";
1125                 return LDAP_PROTOCOL_ERROR;
1126         }
1127
1128         /* blow off parsing the value */
1129
1130         op->o_sortedresults = ctrl->ldctl_iscritical
1131                 ? SLAP_CONTROL_CRITICAL
1132                 : SLAP_CONTROL_NONCRITICAL;
1133
1134         return rc;
1135 }
1136 #endif
1137
1138 static int parseAssert (
1139         Operation *op,
1140         SlapReply *rs,
1141         LDAPControl *ctrl )
1142 {
1143         BerElement      *ber;
1144         struct berval   fstr = BER_BVNULL;
1145
1146         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1147                 rs->sr_text = "assert control specified multiple times";
1148                 return LDAP_PROTOCOL_ERROR;
1149         }
1150
1151         if ( ctrl->ldctl_value.bv_len == 0 ) {
1152                 rs->sr_text = "assert control value is empty (or absent)";
1153                 return LDAP_PROTOCOL_ERROR;
1154         }
1155
1156         ber = ber_init( &(ctrl->ldctl_value) );
1157         if (ber == NULL) {
1158                 rs->sr_text = "assert control: internal error";
1159                 return LDAP_OTHER;
1160         }
1161
1162         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1163                 &rs->sr_text);
1164         (void) ber_free( ber, 1 );
1165         if( rs->sr_err != LDAP_SUCCESS ) {
1166                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1167                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1168                         send_ldap_disconnect( op, rs );
1169                         rs->sr_err = SLAPD_DISCONNECT;
1170                 } else {
1171                         send_ldap_result( op, rs );
1172                 }
1173                 if( op->o_assertion != NULL ) {
1174                         filter_free_x( op, op->o_assertion );
1175                 }
1176                 return rs->sr_err;
1177         }
1178
1179 #ifdef LDAP_DEBUG
1180         filter2bv_x( op, op->o_assertion, &fstr );
1181
1182         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1183                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1184         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1185 #endif
1186
1187         op->o_assert = ctrl->ldctl_iscritical
1188                 ? SLAP_CONTROL_CRITICAL
1189                 : SLAP_CONTROL_NONCRITICAL;
1190
1191         rs->sr_err = LDAP_SUCCESS;
1192         return LDAP_SUCCESS;
1193 }
1194
1195 static int parsePreRead (
1196         Operation *op,
1197         SlapReply *rs,
1198         LDAPControl *ctrl )
1199 {
1200         ber_len_t siz, off, i;
1201         AttributeName *an = NULL;
1202         BerElement      *ber;
1203
1204         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1205                 rs->sr_text = "preread control specified multiple times";
1206                 return LDAP_PROTOCOL_ERROR;
1207         }
1208
1209         if ( ctrl->ldctl_value.bv_len == 0 ) {
1210                 rs->sr_text = "preread control value is empty (or absent)";
1211                 return LDAP_PROTOCOL_ERROR;
1212         }
1213
1214 #ifdef LDAP_X_TXN
1215         if ( op->o_txnSpec ) { /* temporary limitation */
1216                 rs->sr_text = "cannot perform pre-read in transaction";
1217                 return LDAP_UNWILLING_TO_PERFORM;
1218         }
1219 #endif
1220
1221         ber = ber_init( &(ctrl->ldctl_value) );
1222         if (ber == NULL) {
1223                 rs->sr_text = "preread control: internal error";
1224                 return LDAP_OTHER;
1225         }
1226
1227         rs->sr_err = LDAP_SUCCESS;
1228
1229         siz = sizeof( AttributeName );
1230         off = offsetof( AttributeName, an_name );
1231         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1232                 rs->sr_text = "preread control: decoding error";
1233                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1234                 goto done;
1235         }
1236
1237         for( i=0; i<siz; i++ ) {
1238                 const char      *dummy = NULL;
1239
1240                 an[i].an_desc = NULL;
1241                 an[i].an_oc = NULL;
1242                 an[i].an_oc_exclude = 0;
1243                 rs->sr_err = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1244                 if ( rs->sr_err != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1245                         rs->sr_text = dummy
1246                                 ? dummy
1247                                 : "postread control: unknown attributeType";
1248                         goto done;
1249                 }
1250         }
1251
1252         op->o_preread = ctrl->ldctl_iscritical
1253                 ? SLAP_CONTROL_CRITICAL
1254                 : SLAP_CONTROL_NONCRITICAL;
1255
1256         op->o_preread_attrs = an;
1257
1258 done:
1259         (void) ber_free( ber, 1 );
1260         return rs->sr_err;
1261 }
1262
1263 static int parsePostRead (
1264         Operation *op,
1265         SlapReply *rs,
1266         LDAPControl *ctrl )
1267 {
1268         ber_len_t siz, off, i;
1269         AttributeName *an = NULL;
1270         BerElement      *ber;
1271
1272         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1273                 rs->sr_text = "postread control specified multiple times";
1274                 return LDAP_PROTOCOL_ERROR;
1275         }
1276
1277         if ( ctrl->ldctl_value.bv_len == 0 ) {
1278                 rs->sr_text = "postread control value is empty (or absent)";
1279                 return LDAP_PROTOCOL_ERROR;
1280         }
1281
1282 #ifdef LDAP_X_TXN
1283         if ( op->o_txnSpec ) { /* temporary limitation */
1284                 rs->sr_text = "cannot perform post-read in transaction";
1285                 return LDAP_UNWILLING_TO_PERFORM;
1286         }
1287 #endif
1288
1289         ber = ber_init( &(ctrl->ldctl_value) );
1290         if (ber == NULL) {
1291                 rs->sr_text = "postread control: internal error";
1292                 return LDAP_OTHER;
1293         }
1294
1295         rs->sr_err = LDAP_SUCCESS;
1296         siz = sizeof( AttributeName );
1297         off = offsetof( AttributeName, an_name );
1298         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1299                 rs->sr_text = "postread control: decoding error";
1300                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1301                 goto done;
1302         }
1303
1304         for( i=0; i<siz; i++ ) {
1305                 const char      *dummy = NULL;
1306
1307                 an[i].an_desc = NULL;
1308                 an[i].an_oc = NULL;
1309                 an[i].an_oc_exclude = 0;
1310                 rs->sr_err = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1311                 if ( rs->sr_err != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1312                         rs->sr_text = dummy
1313                                 ? dummy
1314                                 : "postread control: unknown attributeType";
1315                         goto done;
1316                 }
1317         }
1318
1319         op->o_postread = ctrl->ldctl_iscritical
1320                 ? SLAP_CONTROL_CRITICAL
1321                 : SLAP_CONTROL_NONCRITICAL;
1322
1323         op->o_postread_attrs = an;
1324
1325 done:
1326         (void) ber_free( ber, 1 );
1327         return rs->sr_err;
1328 }
1329
1330 static int parseValuesReturnFilter (
1331         Operation *op,
1332         SlapReply *rs,
1333         LDAPControl *ctrl )
1334 {
1335         BerElement      *ber;
1336         struct berval   fstr = BER_BVNULL;
1337
1338         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1339                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1340                 return LDAP_PROTOCOL_ERROR;
1341         }
1342
1343         if ( ctrl->ldctl_value.bv_len == 0 ) {
1344                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1345                 return LDAP_PROTOCOL_ERROR;
1346         }
1347
1348         ber = ber_init( &(ctrl->ldctl_value) );
1349         if (ber == NULL) {
1350                 rs->sr_text = "internal error";
1351                 return LDAP_OTHER;
1352         }
1353
1354         rs->sr_err = get_vrFilter( op, ber,
1355                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1356
1357         (void) ber_free( ber, 1 );
1358
1359         if( rs->sr_err != LDAP_SUCCESS ) {
1360                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1361                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1362                         send_ldap_disconnect( op, rs );
1363                         rs->sr_err = SLAPD_DISCONNECT;
1364                 } else {
1365                         send_ldap_result( op, rs );
1366                 }
1367                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1368         }
1369 #ifdef LDAP_DEBUG
1370         else {
1371                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1372         }
1373
1374         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1375                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1376         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1377 #endif
1378
1379         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1380                 ? SLAP_CONTROL_CRITICAL
1381                 : SLAP_CONTROL_NONCRITICAL;
1382
1383         rs->sr_err = LDAP_SUCCESS;
1384         return LDAP_SUCCESS;
1385 }
1386
1387 static int parseSubentries (
1388         Operation *op,
1389         SlapReply *rs,
1390         LDAPControl *ctrl )
1391 {
1392         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1393                 rs->sr_text = "subentries control specified multiple times";
1394                 return LDAP_PROTOCOL_ERROR;
1395         }
1396
1397         /* FIXME: should use BER library */
1398         if( ( ctrl->ldctl_value.bv_len != 3 )
1399                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1400                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1401         {
1402                 rs->sr_text = "subentries control value encoding is bogus";
1403                 return LDAP_PROTOCOL_ERROR;
1404         }
1405
1406         op->o_subentries = ctrl->ldctl_iscritical
1407                 ? SLAP_CONTROL_CRITICAL
1408                 : SLAP_CONTROL_NONCRITICAL;
1409
1410         if (ctrl->ldctl_value.bv_val[2]) {
1411                 set_subentries_visibility( op );
1412         }
1413
1414         return LDAP_SUCCESS;
1415 }
1416
1417 static int parsePermissiveModify (
1418         Operation *op,
1419         SlapReply *rs,
1420         LDAPControl *ctrl )
1421 {
1422         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1423                 rs->sr_text = "permissiveModify control specified multiple times";
1424                 return LDAP_PROTOCOL_ERROR;
1425         }
1426
1427         if ( ctrl->ldctl_value.bv_len ) {
1428                 rs->sr_text = "permissiveModify control value not empty";
1429                 return LDAP_PROTOCOL_ERROR;
1430         }
1431
1432         op->o_permissive_modify = ctrl->ldctl_iscritical
1433                 ? SLAP_CONTROL_CRITICAL
1434                 : SLAP_CONTROL_NONCRITICAL;
1435
1436         return LDAP_SUCCESS;
1437 }
1438
1439 static int parseDomainScope (
1440         Operation *op,
1441         SlapReply *rs,
1442         LDAPControl *ctrl )
1443 {
1444         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1445                 rs->sr_text = "domainScope control specified multiple times";
1446                 return LDAP_PROTOCOL_ERROR;
1447         }
1448
1449         if ( ctrl->ldctl_value.bv_len ) {
1450                 rs->sr_text = "domainScope control value not empty";
1451                 return LDAP_PROTOCOL_ERROR;
1452         }
1453
1454         op->o_domain_scope = ctrl->ldctl_iscritical
1455                 ? SLAP_CONTROL_CRITICAL
1456                 : SLAP_CONTROL_NONCRITICAL;
1457
1458         return LDAP_SUCCESS;
1459 }
1460
1461 #ifdef SLAP_CONTROL_X_TREE_DELETE
1462 static int parseTreeDelete (
1463         Operation *op,
1464         SlapReply *rs,
1465         LDAPControl *ctrl )
1466 {
1467         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1468                 rs->sr_text = "treeDelete control specified multiple times";
1469                 return LDAP_PROTOCOL_ERROR;
1470         }
1471
1472         if ( ctrl->ldctl_value.bv_len ) {
1473                 rs->sr_text = "treeDelete control value not empty";
1474                 return LDAP_PROTOCOL_ERROR;
1475         }
1476
1477         op->o_tree_delete = ctrl->ldctl_iscritical
1478                 ? SLAP_CONTROL_CRITICAL
1479                 : SLAP_CONTROL_NONCRITICAL;
1480
1481         return LDAP_SUCCESS;
1482 }
1483 #endif
1484
1485 static int parseSearchOptions (
1486         Operation *op,
1487         SlapReply *rs,
1488         LDAPControl *ctrl )
1489 {
1490         BerElement *ber;
1491         ber_int_t search_flags;
1492         ber_tag_t tag;
1493
1494         if ( ctrl->ldctl_value.bv_len == 0 ) {
1495                 rs->sr_text = "searchOptions control value is empty (or absent)";
1496                 return LDAP_PROTOCOL_ERROR;
1497         }
1498
1499         ber = ber_init( &ctrl->ldctl_value );
1500         if( ber == NULL ) {
1501                 rs->sr_text = "internal error";
1502                 return LDAP_OTHER;
1503         }
1504
1505         tag = ber_scanf( ber, "{i}", &search_flags );
1506         (void) ber_free( ber, 1 );
1507
1508         if ( tag == LBER_ERROR ) {
1509                 rs->sr_text = "searchOptions control decoding error";
1510                 return LDAP_PROTOCOL_ERROR;
1511         }
1512
1513         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1514                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1515                         rs->sr_text = "searchOptions control specified multiple times "
1516                                 "or with domainScope control";
1517                         return LDAP_PROTOCOL_ERROR;
1518                 }
1519
1520                 op->o_domain_scope = ctrl->ldctl_iscritical
1521                         ? SLAP_CONTROL_CRITICAL
1522                         : SLAP_CONTROL_NONCRITICAL;
1523         }
1524
1525         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1526                 /* Other search flags not recognised so far,
1527                  * including:
1528                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1529                  */
1530                 rs->sr_text = "searchOptions contained unrecognized flag";
1531                 return LDAP_UNWILLING_TO_PERFORM;
1532         }
1533
1534         return LDAP_SUCCESS;
1535 }
1536