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 parseDomainScope;
  29 static SLAP_CTRL_PARSE_FN parseDontUseCopy;
  30 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  31 static SLAP_CTRL_PARSE_FN parseNoOp;
  32 static SLAP_CTRL_PARSE_FN parsePagedResults;
  33 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  34 static SLAP_CTRL_PARSE_FN parsePreRead, parsePostRead;
  35 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  36 static SLAP_CTRL_PARSE_FN parseRelax;
  37 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  38 #ifdef SLAP_SORTEDRESULTS
  39 static SLAP_CTRL_PARSE_FN parseSortedResults;
  40 #endif
  41 static SLAP_CTRL_PARSE_FN parseSubentries;
  42 #ifdef SLAP_CONTROL_X_TREE_DELETE
  43 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  44 #endif
  45 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  46
  47 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  48
  49 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  50 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  51
  52 struct slap_control_ids slap_cids;
  53
  54 struct slap_control {
  55         /* Control OID */
  56         char *sc_oid;
  57
  58         /* The controlID for this control */
  59         int sc_cid;
  60
  61         /* Operations supported by control */
  62         slap_mask_t sc_mask;
  63
  64         /* Extended operations supported by control */
  65         char **sc_extendedops;          /* input */
  66         BerVarray sc_extendedopsbv;     /* run-time use */
  67
  68         /* Control parsing callback */
  69         SLAP_CTRL_PARSE_FN *sc_parse;
  70
  71         LDAP_SLIST_ENTRY(slap_control) sc_next;
  72 };
  73
  74 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  75         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  76
  77 /*
  78  * all known request control OIDs should be added to this list
  79  */
  80 /*
  81  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  82  * addresses an undefined control; this allows to safely test for
  83  * well known controls even if they are not registered, e.g. if
  84  * they get moved to modules.  An example is sc_LDAPsync, which
  85  * is implemented in the syncprov overlay and thus, if configured
  86  * as dynamic module, may not be registered.  One side effect is that
  87  * slap_known_controls[0] == NULL, so it should always be used
  88  * starting from 1.
  89  * FIXME: should we define the "undefined control" oid?
  90  */
  91 char *slap_known_controls[SLAP_MAX_CIDS+1];
  92 static int num_known_controls = 1;
  93
  94 static char *proxy_authz_extops[] = {
  95         LDAP_EXOP_MODIFY_PASSWD,
  96         LDAP_EXOP_WHO_AM_I,
  97         LDAP_EXOP_REFRESH,
  98         NULL
  99 };
 100
 101 static char *manageDSAit_extops[] = {
 102         LDAP_EXOP_REFRESH,
 103         NULL
 104 };
 105
 106 static struct slap_control control_defs[] = {
 107         {  LDAP_CONTROL_ASSERT,
 108                 (int)offsetof(struct slap_control_ids, sc_assert),
 109                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
 110                         SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
 111                 NULL, NULL,
 112                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 113         { LDAP_CONTROL_PRE_READ,
 114                 (int)offsetof(struct slap_control_ids, sc_preRead),
 115                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 116                 NULL, NULL,
 117                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 118         { LDAP_CONTROL_POST_READ,
 119                 (int)offsetof(struct slap_control_ids, sc_postRead),
 120                 SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 121                 NULL, NULL,
 122                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 123         { LDAP_CONTROL_VALUESRETURNFILTER,
 124                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 125                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH,
 126                 NULL, NULL,
 127                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 128         { LDAP_CONTROL_PAGEDRESULTS,
 129                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 130                 SLAP_CTRL_SEARCH,
 131                 NULL, NULL,
 132                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 133 #ifdef SLAP_SORTEDRESULTS
 134         { LDAP_CONTROL_SORTREQUEST,
 135                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 136                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 137                 NULL, NULL,
 138                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 139 #endif
 140         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 141                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 142                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 143                 NULL, NULL,
 144                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 145         { LDAP_CONTROL_DONTUSECOPY,
 146                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 147                 SLAP_CTRL_GLOBAL|SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
 148                 NULL, NULL,
 149                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 150         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 151                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 152                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
 153                 NULL, NULL,
 154                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 155 #ifdef SLAP_CONTROL_X_TREE_DELETE
 156         { LDAP_CONTROL_X_TREE_DELETE,
 157                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 158                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
 159                 NULL, NULL,
 160                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 161 #endif
 162         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 163                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 164                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 165                 NULL, NULL,
 166                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 167         { LDAP_CONTROL_SUBENTRIES,
 168                 (int)offsetof(struct slap_control_ids, sc_subentries),
 169                 SLAP_CTRL_SEARCH,
 170                 NULL, NULL,
 171                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 172         { LDAP_CONTROL_NOOP,
 173                 (int)offsetof(struct slap_control_ids, sc_noOp),
 174                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 175                 NULL, NULL,
 176                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 177         { LDAP_CONTROL_RELAX,
 178                 (int)offsetof(struct slap_control_ids, sc_relax),
 179                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 180                 NULL, NULL,
 181                 parseRelax, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 182 #ifdef LDAP_X_TXN
 183         { LDAP_CONTROL_X_TXN_SPEC,
 184                 (int)offsetof(struct slap_control_ids, sc_txnSpec),
 185                 SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 186                 NULL, NULL,
 187                 txn_spec_ctrl, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 188 #endif
 189         { LDAP_CONTROL_MANAGEDSAIT,
 190                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 191                 SLAP_CTRL_ACCESS,
 192                 manageDSAit_extops, NULL,
 193                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 194         { LDAP_CONTROL_PROXY_AUTHZ,
 195                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 196                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
 197                 proxy_authz_extops, NULL,
 198                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 199         { NULL, 0, 0, NULL, 0, NULL, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 200 };
 201
 202 static struct slap_control *
 203 find_ctrl( const char *oid );
 204
 205 /*
 206  * Register a supported control.
 207  *
 208  * This can be called by an OpenLDAP plugin or, indirectly, by a
 209  * SLAPI plugin calling slapi_register_supported_control().
 210  *
 211  * NOTE: if flags == 1 the control is replaced if already registered;
 212  * otherwise registering an already registered control is not allowed.
 213  */
 214 int
 215 register_supported_control2(const char *controloid,
 216         slap_mask_t controlmask,
 217         char **controlexops,
 218         SLAP_CTRL_PARSE_FN *controlparsefn,
 219         unsigned flags,
 220         int *controlcid)
 221 {
 222         struct slap_control *sc = NULL;
 223         int i;
 224         BerVarray extendedopsbv = NULL;
 225
 226         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 227                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 228                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 229                 SLAP_MAX_CIDS, 0, 0 );
 230                 return LDAP_OTHER;
 231         }
 232
 233         if ( controloid == NULL ) {
 234                 return LDAP_PARAM_ERROR;
 235         }
 236
 237         /* check if already registered */
 238         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 239                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 240                         if ( flags == 1 ) {
 241                                 Debug( LDAP_DEBUG_TRACE,
 242                                         "Control %s already registered; replacing.\n",
 243                                         controloid, 0, 0 );
 244                                 /* (find and) replace existing handler */
 245                                 sc = find_ctrl( controloid );
 246                                 assert( sc != NULL );
 247                                 break;
 248                         }
 249
 250                         Debug( LDAP_DEBUG_ANY,
 251                                 "Control %s already registered.\n",
 252                                 controloid, 0, 0 );
 253                         return LDAP_PARAM_ERROR;
 254                 }
 255         }
 256
 257         /* turn compatible extended operations into bervals */
 258         if ( controlexops != NULL ) {
 259                 int i;
 260
 261                 for ( i = 0; controlexops[ i ]; i++ );
 262
 263                 extendedopsbv = ber_memcalloc( i + 1, sizeof( struct berval ) );
 264                 if ( extendedopsbv == NULL ) {
 265                         return LDAP_NO_MEMORY;
 266                 }
 267
 268                 for ( i = 0; controlexops[ i ]; i++ ) {
 269                         ber_str2bv( controlexops[ i ], 0, 1, &extendedopsbv[ i ] );
 270                 }
 271         }
 272
 273         if ( sc == NULL ) {
 274                 sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 275                 if ( sc == NULL ) {
 276                         return LDAP_NO_MEMORY;
 277                 }
 278
 279                 sc->sc_oid = ch_strdup( controloid );
 280                 sc->sc_cid = num_known_controls;
 281
 282                 /* Update slap_known_controls, too. */
 283                 slap_known_controls[num_known_controls - 1] = sc->sc_oid;
 284                 slap_known_controls[num_known_controls++] = NULL;
 285
 286                 LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 287                 LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 288
 289         } else {
 290                 if ( sc->sc_extendedopsbv ) {
 291                         /* FIXME: in principle, we should rather merge
 292                          * existing extops with those supported by the
 293                          * new control handling implementation.
 294                          * In fact, whether a control is compatible with
 295                          * an extop should not be a matter of implementation.
 296                          * We likely also need a means for a newly
 297                          * registered extop to declare that it is
 298                          * comptible with an already registered control.
 299                          */
 300                         ber_bvarray_free( sc->sc_extendedopsbv );
 301                         sc->sc_extendedopsbv = NULL;
 302                         sc->sc_extendedops = NULL;
 303                 }
 304         }
 305
 306         sc->sc_extendedopsbv = extendedopsbv;
 307         sc->sc_mask = controlmask;
 308         sc->sc_parse = controlparsefn;
 309         if ( controlcid ) {
 310                 *controlcid = sc->sc_cid;
 311         }
 312
 313         return LDAP_SUCCESS;
 314 }
 315
 316 /*
 317  * One-time initialization of internal controls.
 318  */
 319 int
 320 slap_controls_init( void )
 321 {
 322         int i, rc;
 323
 324         rc = LDAP_SUCCESS;
 325
 326         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 327                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 328                 rc = register_supported_control( control_defs[i].sc_oid,
 329                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 330                         control_defs[i].sc_parse, cid );
 331                 if ( rc != LDAP_SUCCESS ) break;
 332         }
 333
 334         return rc;
 335 }
 336
 337 /*
 338  * Free memory associated with list of supported controls.
 339  */
 340 void
 341 controls_destroy( void )
 342 {
 343         struct slap_control *sc;
 344
 345         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 346                 sc = LDAP_SLIST_FIRST(&controls_list);
 347                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 348
 349                 ch_free( sc->sc_oid );
 350                 if ( sc->sc_extendedopsbv != NULL ) {
 351                         ber_bvarray_free( sc->sc_extendedopsbv );
 352                 }
 353                 ch_free( sc );
 354         }
 355 }
 356
 357 /*
 358  * Format the supportedControl attribute of the root DSE,
 359  * detailing which controls are supported by the directory
 360  * server.
 361  */
 362 int
 363 controls_root_dse_info( Entry *e )
 364 {
 365         AttributeDescription *ad_supportedControl
 366                 = slap_schema.si_ad_supportedControl;
 367         struct berval vals[2];
 368         struct slap_control *sc;
 369
 370         vals[1].bv_val = NULL;
 371         vals[1].bv_len = 0;
 372
 373         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 374                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 375
 376                 vals[0].bv_val = sc->sc_oid;
 377                 vals[0].bv_len = strlen( sc->sc_oid );
 378
 379                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 380                         return -1;
 381                 }
 382         }
 383
 384         return 0;
 385 }
 386
 387 /*
 388  * Return a list of OIDs and operation masks for supported
 389  * controls. Used by SLAPI.
 390  */
 391 int
 392 get_supported_controls(char ***ctrloidsp,
 393         slap_mask_t **ctrlmasks)
 394 {
 395         int n;
 396         char **oids;
 397         slap_mask_t *masks;
 398         struct slap_control *sc;
 399
 400         n = 0;
 401
 402         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 403                 n++;
 404         }
 405
 406         if ( n == 0 ) {
 407                 *ctrloidsp = NULL;
 408                 *ctrlmasks = NULL;
 409                 return LDAP_SUCCESS;
 410         }
 411
 412         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 413         if ( oids == NULL ) {
 414                 return LDAP_NO_MEMORY;
 415         }
 416         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 417         if  ( masks == NULL ) {
 418                 SLAP_FREE( oids );
 419                 return LDAP_NO_MEMORY;
 420         }
 421
 422         n = 0;
 423
 424         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 425                 oids[n] = ch_strdup( sc->sc_oid );
 426                 masks[n] = sc->sc_mask;
 427                 n++;
 428         }
 429         oids[n] = NULL;
 430         masks[n] = 0;
 431
 432         *ctrloidsp = oids;
 433         *ctrlmasks = masks;
 434
 435         return LDAP_SUCCESS;
 436 }
 437
 438 /*
 439  * Find a control given its OID.
 440  */
 441 static struct slap_control *
 442 find_ctrl( const char *oid )
 443 {
 444         struct slap_control *sc;
 445
 446         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 447                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 448                         return sc;
 449                 }
 450         }
 451
 452         return NULL;
 453 }
 454
 455 int
 456 slap_find_control_id(
 457         const char *oid,
 458         int *cid )
 459 {
 460         struct slap_control *ctrl = find_ctrl( oid );
 461         if ( ctrl ) {
 462                 if ( cid ) *cid = ctrl->sc_cid;
 463                 return LDAP_SUCCESS;
 464         }
 465         return LDAP_CONTROL_NOT_FOUND;
 466 }
 467
 468 int
 469 slap_global_control( Operation *op, const char *oid, int *cid )
 470 {
 471         struct slap_control *ctrl = find_ctrl( oid );
 472
 473         if ( ctrl == NULL ) {
 474                 /* should not be reachable */
 475                 Debug( LDAP_DEBUG_ANY,
 476                         "slap_global_control: unrecognized control: %s\n",
 477                         oid, 0, 0 );
 478                 return LDAP_CONTROL_NOT_FOUND;
 479         }
 480
 481         if ( cid ) *cid = ctrl->sc_cid;
 482
 483         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 484                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 485                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 486         {
 487                 return LDAP_COMPARE_TRUE;
 488         }
 489
 490 #if 0
 491         Debug( LDAP_DEBUG_TRACE,
 492                 "slap_global_control: unavailable control: %s\n",
 493                 oid, 0, 0 );
 494 #endif
 495
 496         return LDAP_COMPARE_FALSE;
 497 }
 498
 499 void slap_free_ctrls(
 500         Operation *op,
 501         LDAPControl **ctrls )
 502 {
 503         int i;
 504
 505         for (i=0; ctrls[i]; i++) {
 506                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 507         }
 508         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 509 }
 510
 511 int slap_parse_ctrl(
 512         Operation *op,
 513         SlapReply *rs,
 514         LDAPControl *control,
 515         const char **text )
 516 {
 517         struct slap_control *sc;
 518
 519         sc = find_ctrl( control->ldctl_oid );
 520         if( sc != NULL ) {
 521                 /* recognized control */
 522                 slap_mask_t tagmask;
 523                 switch( op->o_tag ) {
 524                 case LDAP_REQ_ADD:
 525                         tagmask = SLAP_CTRL_ADD;
 526                         break;
 527                 case LDAP_REQ_BIND:
 528                         tagmask = SLAP_CTRL_BIND;
 529                         break;
 530                 case LDAP_REQ_COMPARE:
 531                         tagmask = SLAP_CTRL_COMPARE;
 532                         break;
 533                 case LDAP_REQ_DELETE:
 534                         tagmask = SLAP_CTRL_DELETE;
 535                         break;
 536                 case LDAP_REQ_MODIFY:
 537                         tagmask = SLAP_CTRL_MODIFY;
 538                         break;
 539                 case LDAP_REQ_RENAME:
 540                         tagmask = SLAP_CTRL_RENAME;
 541                         break;
 542                 case LDAP_REQ_SEARCH:
 543                         tagmask = SLAP_CTRL_SEARCH;
 544                         break;
 545                 case LDAP_REQ_UNBIND:
 546                         tagmask = SLAP_CTRL_UNBIND;
 547                         break;
 548                 case LDAP_REQ_ABANDON:
 549                         tagmask = SLAP_CTRL_ABANDON;
 550                         break;
 551                 case LDAP_REQ_EXTENDED:
 552                         tagmask=~0L;
 553                         assert( op->ore_reqoid.bv_val != NULL );
 554                         if( sc->sc_extendedopsbv != NULL ) {
 555                                 int i;
 556                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 557                                         if( bvmatch( &op->ore_reqoid,
 558                                                 &sc->sc_extendedopsbv[i] ) )
 559                                         {
 560                                                 tagmask=0L;
 561                                                 break;
 562                                         }
 563                                 }
 564                         }
 565                         break;
 566                 default:
 567                         *text = "controls internal error";
 568                         return LDAP_OTHER;
 569                 }
 570
 571                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 572                         /* available extension */
 573                         int     rc;
 574
 575                         if( !sc->sc_parse ) {
 576                                 *text = "not yet implemented";
 577                                 return LDAP_OTHER;
 578                         }
 579
 580                         rc = sc->sc_parse( op, rs, control );
 581                         if ( rc ) {
 582                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 583                                 return rc;
 584                         }
 585
 586                 } else if( control->ldctl_iscritical ) {
 587                         /* unavailable CRITICAL control */
 588                         *text = "critical extension is unavailable";
 589                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 590                 }
 591         } else if( control->ldctl_iscritical ) {
 592                 /* unrecognized CRITICAL control */
 593                 *text = "critical extension is not recognized";
 594                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 595         }
 596
 597         return LDAP_SUCCESS;
 598 }
 599
 600 int get_ctrls(
 601         Operation *op,
 602         SlapReply *rs,
 603         int sendres )
 604 {
 605         int nctrls = 0;
 606         ber_tag_t tag;
 607         ber_len_t len;
 608         char *opaque;
 609         BerElement *ber = op->o_ber;
 610         struct berval bv;
 611
 612         len = ber_pvt_ber_remaining(ber);
 613
 614         if( len == 0) {
 615                 /* no controls */
 616                 rs->sr_err = LDAP_SUCCESS;
 617                 return rs->sr_err;
 618         }
 619
 620         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 621                 if( tag == LBER_ERROR ) {
 622                         rs->sr_err = SLAPD_DISCONNECT;
 623                         rs->sr_text = "unexpected data in PDU";
 624                 }
 625
 626                 goto return_results;
 627         }
 628
 629         Debug( LDAP_DEBUG_TRACE,
 630                 "=> get_ctrls\n", 0, 0, 0 );
 631
 632         if( op->o_protocol < LDAP_VERSION3 ) {
 633                 rs->sr_err = SLAPD_DISCONNECT;
 634                 rs->sr_text = "controls require LDAPv3";
 635                 goto return_results;
 636         }
 637
 638         /* one for first control, one for termination */
 639         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 640
 641 #if 0
 642         if( op->ctrls == NULL ) {
 643                 rs->sr_err = LDAP_NO_MEMORY;
 644                 rs->sr_text = "no memory";
 645                 goto return_results;
 646         }
 647 #endif
 648
 649         op->o_ctrls[nctrls] = NULL;
 650
 651         /* step through each element */
 652         for( tag = ber_first_element( ber, &len, &opaque );
 653                 tag != LBER_ERROR;
 654                 tag = ber_next_element( ber, &len, opaque ) )
 655         {
 656                 LDAPControl *c;
 657                 LDAPControl **tctrls;
 658
 659                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 660                 memset(c, 0, sizeof(LDAPControl));
 661
 662                 /* allocate pointer space for current controls (nctrls)
 663                  * + this control + extra NULL
 664                  */
 665                 tctrls = op->o_tmprealloc( op->o_ctrls,
 666                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 667
 668 #if 0
 669                 if( tctrls == NULL ) {
 670                         ch_free( c );
 671                         ldap_controls_free(op->o_ctrls);
 672                         op->o_ctrls = NULL;
 673
 674                         rs->sr_err = LDAP_NO_MEMORY;
 675                         rs->sr_text = "no memory";
 676                         goto return_results;
 677                 }
 678 #endif
 679                 op->o_ctrls = tctrls;
 680
 681                 op->o_ctrls[nctrls++] = c;
 682                 op->o_ctrls[nctrls] = NULL;
 683
 684                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 685                 c->ldctl_oid = bv.bv_val;
 686
 687                 if( tag == LBER_ERROR ) {
 688                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 689                                 0, 0, 0 );
 690
 691                         slap_free_ctrls( op, op->o_ctrls );
 692                         op->o_ctrls = NULL;
 693                         rs->sr_err = SLAPD_DISCONNECT;
 694                         rs->sr_text = "decoding controls error";
 695                         goto return_results;
 696
 697                 } else if( c->ldctl_oid == NULL ) {
 698                         Debug( LDAP_DEBUG_TRACE,
 699                                 "get_ctrls: conn %lu got emtpy OID.\n",
 700                                 op->o_connid, 0, 0 );
 701
 702                         slap_free_ctrls( op, op->o_ctrls );
 703                         op->o_ctrls = NULL;
 704                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 705                         rs->sr_text = "OID field is empty";
 706                         goto return_results;
 707                 }
 708
 709                 tag = ber_peek_tag( ber, &len );
 710
 711                 if( tag == LBER_BOOLEAN ) {
 712                         ber_int_t crit;
 713                         tag = ber_scanf( ber, "b", &crit );
 714
 715                         if( tag == LBER_ERROR ) {
 716                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 717                                         0, 0, 0 );
 718                                 slap_free_ctrls( op, op->o_ctrls );
 719                                 op->o_ctrls = NULL;
 720                                 rs->sr_err = SLAPD_DISCONNECT;
 721                                 rs->sr_text = "decoding controls error";
 722                                 goto return_results;
 723                         }
 724
 725                         c->ldctl_iscritical = (crit != 0);
 726                         tag = ber_peek_tag( ber, &len );
 727                 }
 728
 729                 if( tag == LBER_OCTETSTRING ) {
 730                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 731
 732                         if( tag == LBER_ERROR ) {
 733                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 734                                         "%s (%scritical): get value failed.\n",
 735                                         op->o_connid, c->ldctl_oid,
 736                                         c->ldctl_iscritical ? "" : "non" );
 737                                 slap_free_ctrls( op, op->o_ctrls );
 738                                 op->o_ctrls = NULL;
 739                                 rs->sr_err = SLAPD_DISCONNECT;
 740                                 rs->sr_text = "decoding controls error";
 741                                 goto return_results;
 742                         }
 743                 }
 744
 745                 Debug( LDAP_DEBUG_TRACE,
 746                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 747                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 748
 749                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 750                 if ( rs->sr_err != LDAP_SUCCESS ) {
 751                         goto return_results;
 752                 }
 753         }
 754
 755 return_results:
 756         Debug( LDAP_DEBUG_TRACE,
 757                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 758                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 759
 760         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 761                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 762                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 763                         send_ldap_disconnect( op, rs );
 764                         rs->sr_err = SLAPD_DISCONNECT;
 765                 } else {
 766                         send_ldap_result( op, rs );
 767                 }
 768         }
 769
 770         return rs->sr_err;
 771 }
 772
 773 int
 774 slap_remove_control(
 775         Operation       *op,
 776         SlapReply       *rs,
 777         int             ctrl,
 778         BI_chk_controls fnc )
 779 {
 780         int             i, j;
 781
 782         switch ( op->o_ctrlflag[ ctrl ] ) {
 783         case SLAP_CONTROL_NONCRITICAL:
 784                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 785                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 786                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 787                         {
 788                                 j = i;
 789                         }
 790                 }
 791
 792                 if ( j == -1 ) {
 793                         rs->sr_err = LDAP_OTHER;
 794                         break;
 795                 }
 796
 797                 if ( fnc ) {
 798                         (void)fnc( op, rs );
 799                 }
 800
 801                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 802
 803                 if ( i > 1 ) {
 804                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 805                                 ( i - j ) * sizeof( LDAPControl * ) );
 806
 807                 } else {
 808                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 809                         op->o_ctrls = NULL;
 810                 }
 811
 812                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 813
 814                 Debug( LDAP_DEBUG_ANY, "%s: "
 815                         "non-critical control \"%s\" not supported; stripped.\n",
 816                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 817                 /* fall thru */
 818
 819         case SLAP_CONTROL_IGNORED:
 820         case SLAP_CONTROL_NONE:
 821                 rs->sr_err = SLAP_CB_CONTINUE;
 822                 break;
 823
 824         case SLAP_CONTROL_CRITICAL:
 825                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 826                 if ( fnc ) {
 827                         (void)fnc( op, rs );
 828                 }
 829                 Debug( LDAP_DEBUG_ANY, "%s: "
 830                         "critical control \"%s\" not supported.\n",
 831                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 832                 break;
 833
 834         default:
 835                 /* handle all cases! */
 836                 assert( 0 );
 837         }
 838
 839         return rs->sr_err;
 840 }
 841
 842 static int parseDontUseCopy (
 843         Operation *op,
 844         SlapReply *rs,
 845         LDAPControl *ctrl )
 846 {
 847         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 848                 rs->sr_text = "dontUseCopy control specified multiple times";
 849                 return LDAP_PROTOCOL_ERROR;
 850         }
 851
 852         if ( ctrl->ldctl_value.bv_len ) {
 853                 rs->sr_text = "dontUseCopy control value not empty";
 854                 return LDAP_PROTOCOL_ERROR;
 855         }
 856
 857         if ( !ctrl->ldctl_iscritical ) {
 858                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 859                 return LDAP_PROTOCOL_ERROR;
 860         }
 861
 862         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 863         return LDAP_SUCCESS;
 864 }
 865
 866 static int parseRelax (
 867         Operation *op,
 868         SlapReply *rs,
 869         LDAPControl *ctrl )
 870 {
 871         if ( op->o_relax != SLAP_CONTROL_NONE ) {
 872                 rs->sr_text = "relax control specified multiple times";
 873                 return LDAP_PROTOCOL_ERROR;
 874         }
 875
 876         if ( ctrl->ldctl_value.bv_len ) {
 877                 rs->sr_text = "relax control value not empty";
 878                 return LDAP_PROTOCOL_ERROR;
 879         }
 880
 881         op->o_relax = ctrl->ldctl_iscritical
 882                 ? SLAP_CONTROL_CRITICAL
 883                 : SLAP_CONTROL_NONCRITICAL;
 884
 885         return LDAP_SUCCESS;
 886 }
 887
 888 static int parseManageDSAit (
 889         Operation *op,
 890         SlapReply *rs,
 891         LDAPControl *ctrl )
 892 {
 893         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 894                 rs->sr_text = "manageDSAit control specified multiple times";
 895                 return LDAP_PROTOCOL_ERROR;
 896         }
 897
 898         if ( ctrl->ldctl_value.bv_len ) {
 899                 rs->sr_text = "manageDSAit control value not empty";
 900                 return LDAP_PROTOCOL_ERROR;
 901         }
 902
 903         op->o_managedsait = ctrl->ldctl_iscritical
 904                 ? SLAP_CONTROL_CRITICAL
 905                 : SLAP_CONTROL_NONCRITICAL;
 906
 907         return LDAP_SUCCESS;
 908 }
 909
 910 static int parseProxyAuthz (
 911         Operation *op,
 912         SlapReply *rs,
 913         LDAPControl *ctrl )
 914 {
 915         int             rc;
 916         struct berval   dn = BER_BVNULL;
 917
 918         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 919                 rs->sr_text = "proxy authorization control specified multiple times";
 920                 return LDAP_PROTOCOL_ERROR;
 921         }
 922
 923         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
 924                 && BER_BVISEMPTY( &op->o_ndn ) )
 925         {
 926                 rs->sr_text = "anonymous proxied authorization not allowed";
 927                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 928         }
 929
 930         op->o_proxy_authz = ctrl->ldctl_iscritical
 931                 ? SLAP_CONTROL_CRITICAL
 932                 : SLAP_CONTROL_NONCRITICAL;
 933
 934         Debug( LDAP_DEBUG_ARGS,
 935                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 936                 op->o_connid,
 937                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 938                 0 );
 939
 940         if ( ctrl->ldctl_value.bv_len == 0 ) {
 941                 Debug( LDAP_DEBUG_TRACE,
 942                         "parseProxyAuthz: conn=%lu anonymous\n",
 943                         op->o_connid, 0, 0 );
 944
 945                 /* anonymous */
 946                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 947                         op->o_ndn.bv_val[ 0 ] = '\0';
 948                 }
 949                 op->o_ndn.bv_len = 0;
 950
 951                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 952                         op->o_dn.bv_val[ 0 ] = '\0';
 953                 }
 954                 op->o_dn.bv_len = 0;
 955
 956                 return LDAP_SUCCESS;
 957         }
 958
 959         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 960                         NULL, &dn, SLAP_GETDN_AUTHZID );
 961
 962         /* FIXME: empty DN in proxyAuthz control should be legal... */
 963         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 964                 if ( dn.bv_val ) {
 965                         ch_free( dn.bv_val );
 966                 }
 967                 rs->sr_text = "authzId mapping failed";
 968                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 969         }
 970
 971         Debug( LDAP_DEBUG_TRACE,
 972                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 973                 op->o_connid,
 974                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 975
 976         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 977
 978         if ( rc ) {
 979                 ch_free( dn.bv_val );
 980                 rs->sr_text = "not authorized to assume identity";
 981                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 982         }
 983
 984         ch_free( op->o_ndn.bv_val );
 985         ch_free( op->o_dn.bv_val );
 986
 987         /*
 988          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 989          * from now on op->o_dn is normalized
 990          */
 991         op->o_ndn = dn;
 992         ber_dupbv( &op->o_dn, &dn );
 993
 994         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 995             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 996
 997         return LDAP_SUCCESS;
 998 }
 999
1000 static int parseNoOp (
1001         Operation *op,
1002         SlapReply *rs,
1003         LDAPControl *ctrl )
1004 {
1005         if ( op->o_noop != SLAP_CONTROL_NONE ) {
1006                 rs->sr_text = "noop control specified multiple times";
1007                 return LDAP_PROTOCOL_ERROR;
1008         }
1009
1010         if ( ctrl->ldctl_value.bv_len ) {
1011                 rs->sr_text = "noop control value not empty";
1012                 return LDAP_PROTOCOL_ERROR;
1013         }
1014
1015         op->o_noop = ctrl->ldctl_iscritical
1016                 ? SLAP_CONTROL_CRITICAL
1017                 : SLAP_CONTROL_NONCRITICAL;
1018
1019         return LDAP_SUCCESS;
1020 }
1021
1022 static int parsePagedResults (
1023         Operation *op,
1024         SlapReply *rs,
1025         LDAPControl *ctrl )
1026 {
1027         int             rc = LDAP_SUCCESS;
1028         ber_tag_t       tag;
1029         ber_int_t       size;
1030         BerElement      *ber;
1031         struct berval   cookie = BER_BVNULL;
1032         PagedResultsState       *ps;
1033
1034         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1035                 rs->sr_text = "paged results control specified multiple times";
1036                 return LDAP_PROTOCOL_ERROR;
1037         }
1038
1039         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1040                 rs->sr_text = "paged results control value is empty (or absent)";
1041                 return LDAP_PROTOCOL_ERROR;
1042         }
1043
1044         /* Parse the control value
1045          *      realSearchControlValue ::= SEQUENCE {
1046          *              size    INTEGER (0..maxInt),
1047          *                              -- requested page size from client
1048          *                              -- result set size estimate from server
1049          *              cookie  OCTET STRING
1050          * }
1051          */
1052         ber = ber_init( &ctrl->ldctl_value );
1053         if ( ber == NULL ) {
1054                 rs->sr_text = "internal error";
1055                 return LDAP_OTHER;
1056         }
1057
1058         tag = ber_scanf( ber, "{im}", &size, &cookie );
1059
1060         if ( tag == LBER_ERROR ) {
1061                 rs->sr_text = "paged results control could not be decoded";
1062                 rc = LDAP_PROTOCOL_ERROR;
1063                 goto done;
1064         }
1065
1066         if ( size < 0 ) {
1067                 rs->sr_text = "paged results control size invalid";
1068                 rc = LDAP_PROTOCOL_ERROR;
1069                 goto done;
1070         }
1071
1072         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1073         *ps = op->o_conn->c_pagedresults_state;
1074         ps->ps_size = size;
1075         op->o_pagedresults_state = ps;
1076
1077         /* NOTE: according to RFC 2696 3.:
1078
1079     If the page size is greater than or equal to the sizeLimit value, the
1080     server should ignore the control as the request can be satisfied in a
1081     single page.
1082
1083          * NOTE: this assumes that the op->ors_slimit be set
1084          * before the controls are parsed.
1085          */
1086
1087         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1088                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1089
1090         } else if ( ctrl->ldctl_iscritical ) {
1091                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1092
1093         } else {
1094                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1095         }
1096
1097 done:;
1098         (void)ber_free( ber, 1 );
1099         return rc;
1100 }
1101
1102 #ifdef SLAP_SORTEDRESULTS
1103 static int parseSortedResults (
1104         Operation *op,
1105         SlapReply *rs,
1106         LDAPControl *ctrl )
1107 {
1108         int             rc = LDAP_SUCCESS;
1109
1110         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1111                 rs->sr_text = "sorted results control specified multiple times";
1112                 return LDAP_PROTOCOL_ERROR;
1113         }
1114
1115         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1116                 rs->sr_text = "sorted results control value is empty (or absent)";
1117                 return LDAP_PROTOCOL_ERROR;
1118         }
1119
1120         /* blow off parsing the value */
1121
1122         op->o_sortedresults = ctrl->ldctl_iscritical
1123                 ? SLAP_CONTROL_CRITICAL
1124                 : SLAP_CONTROL_NONCRITICAL;
1125
1126         return rc;
1127 }
1128 #endif
1129
1130 static int parseAssert (
1131         Operation *op,
1132         SlapReply *rs,
1133         LDAPControl *ctrl )
1134 {
1135         BerElement      *ber;
1136         struct berval   fstr = BER_BVNULL;
1137
1138         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1139                 rs->sr_text = "assert control specified multiple times";
1140                 return LDAP_PROTOCOL_ERROR;
1141         }
1142
1143         if ( ctrl->ldctl_value.bv_len == 0 ) {
1144                 rs->sr_text = "assert control value is empty (or absent)";
1145                 return LDAP_PROTOCOL_ERROR;
1146         }
1147
1148         ber = ber_init( &(ctrl->ldctl_value) );
1149         if (ber == NULL) {
1150                 rs->sr_text = "assert control: internal error";
1151                 return LDAP_OTHER;
1152         }
1153
1154         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1155                 &rs->sr_text);
1156         (void) ber_free( ber, 1 );
1157         if( rs->sr_err != LDAP_SUCCESS ) {
1158                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1159                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1160                         send_ldap_disconnect( op, rs );
1161                         rs->sr_err = SLAPD_DISCONNECT;
1162                 } else {
1163                         send_ldap_result( op, rs );
1164                 }
1165                 if( op->o_assertion != NULL ) {
1166                         filter_free_x( op, op->o_assertion );
1167                 }
1168                 return rs->sr_err;
1169         }
1170
1171 #ifdef LDAP_DEBUG
1172         filter2bv_x( op, op->o_assertion, &fstr );
1173
1174         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1175                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1176         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1177 #endif
1178
1179         op->o_assert = ctrl->ldctl_iscritical
1180                 ? SLAP_CONTROL_CRITICAL
1181                 : SLAP_CONTROL_NONCRITICAL;
1182
1183         rs->sr_err = LDAP_SUCCESS;
1184         return LDAP_SUCCESS;
1185 }
1186
1187 static int parsePreRead (
1188         Operation *op,
1189         SlapReply *rs,
1190         LDAPControl *ctrl )
1191 {
1192         ber_len_t siz, off, i;
1193         AttributeName *an = NULL;
1194         BerElement      *ber;
1195
1196         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1197                 rs->sr_text = "preread control specified multiple times";
1198                 return LDAP_PROTOCOL_ERROR;
1199         }
1200
1201         if ( ctrl->ldctl_value.bv_len == 0 ) {
1202                 rs->sr_text = "preread control value is empty (or absent)";
1203                 return LDAP_PROTOCOL_ERROR;
1204         }
1205
1206 #ifdef LDAP_X_TXN
1207         if ( op->o_txnSpec ) { /* temporary limitation */
1208                 rs->sr_text = "cannot perform pre-read in transaction";
1209                 return LDAP_UNWILLING_TO_PERFORM;
1210         }
1211 #endif
1212
1213         ber = ber_init( &(ctrl->ldctl_value) );
1214         if (ber == NULL) {
1215                 rs->sr_text = "preread control: internal error";
1216                 return LDAP_OTHER;
1217         }
1218
1219         rs->sr_err = LDAP_SUCCESS;
1220
1221         siz = sizeof( AttributeName );
1222         off = offsetof( AttributeName, an_name );
1223         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1224                 rs->sr_text = "preread control: decoding error";
1225                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1226                 goto done;
1227         }
1228
1229         for( i=0; i<siz; i++ ) {
1230                 const char      *dummy = NULL;
1231
1232                 an[i].an_desc = NULL;
1233                 an[i].an_oc = NULL;
1234                 an[i].an_oc_exclude = 0;
1235                 rs->sr_err = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1236                 if ( rs->sr_err != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1237                         rs->sr_text = dummy
1238                                 ? dummy
1239                                 : "postread control: unknown attributeType";
1240                         goto done;
1241                 }
1242         }
1243
1244         op->o_preread = ctrl->ldctl_iscritical
1245                 ? SLAP_CONTROL_CRITICAL
1246                 : SLAP_CONTROL_NONCRITICAL;
1247
1248         op->o_preread_attrs = an;
1249
1250 done:
1251         (void) ber_free( ber, 1 );
1252         return rs->sr_err;
1253 }
1254
1255 static int parsePostRead (
1256         Operation *op,
1257         SlapReply *rs,
1258         LDAPControl *ctrl )
1259 {
1260         ber_len_t siz, off, i;
1261         AttributeName *an = NULL;
1262         BerElement      *ber;
1263
1264         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1265                 rs->sr_text = "postread control specified multiple times";
1266                 return LDAP_PROTOCOL_ERROR;
1267         }
1268
1269         if ( ctrl->ldctl_value.bv_len == 0 ) {
1270                 rs->sr_text = "postread control value is empty (or absent)";
1271                 return LDAP_PROTOCOL_ERROR;
1272         }
1273
1274 #ifdef LDAP_X_TXN
1275         if ( op->o_txnSpec ) { /* temporary limitation */
1276                 rs->sr_text = "cannot perform post-read in transaction";
1277                 return LDAP_UNWILLING_TO_PERFORM;
1278         }
1279 #endif
1280
1281         ber = ber_init( &(ctrl->ldctl_value) );
1282         if (ber == NULL) {
1283                 rs->sr_text = "postread control: internal error";
1284                 return LDAP_OTHER;
1285         }
1286
1287         rs->sr_err = LDAP_SUCCESS;
1288         siz = sizeof( AttributeName );
1289         off = offsetof( AttributeName, an_name );
1290         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1291                 rs->sr_text = "postread control: decoding error";
1292                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1293                 goto done;
1294         }
1295
1296         for ( i = 0; i < siz; i++ ) {
1297                 const char      *dummy = NULL;
1298                 int             rc;
1299
1300                 an[i].an_desc = NULL;
1301                 an[i].an_oc = NULL;
1302                 an[i].an_oc_exclude = 0;
1303                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1304                 if ( rc != LDAP_SUCCESS ) {
1305                         int                     i;
1306                         static struct berval    special_attrs[] = {
1307                                 BER_BVC( LDAP_NO_ATTRS ),
1308                                 BER_BVC( LDAP_ALL_USER_ATTRIBUTES ),
1309                                 BER_BVC( LDAP_ALL_OPERATIONAL_ATTRIBUTES ),
1310                                 BER_BVNULL
1311                         };
1312
1313                         /* deal with special attribute types */
1314                         for ( i = 0; !BER_BVISNULL( &special_attrs[ i ] ); i++ ) {
1315                                 if ( bvmatch( &an[i].an_name, &special_attrs[ i ] ) ) {
1316                                         break;
1317                                 }
1318                         }
1319
1320                         if ( BER_BVISNULL( &special_attrs[ i ] ) && ctrl->ldctl_iscritical ) {
1321                                 rs->sr_err = rc;
1322                                 rs->sr_text = dummy
1323                                         ? dummy
1324                                         : "postread control: unknown attributeType";
1325                                 goto done;
1326                         }
1327                 }
1328         }
1329
1330         op->o_postread = ctrl->ldctl_iscritical
1331                 ? SLAP_CONTROL_CRITICAL
1332                 : SLAP_CONTROL_NONCRITICAL;
1333
1334         op->o_postread_attrs = an;
1335
1336 done:
1337         (void) ber_free( ber, 1 );
1338         return rs->sr_err;
1339 }
1340
1341 static int parseValuesReturnFilter (
1342         Operation *op,
1343         SlapReply *rs,
1344         LDAPControl *ctrl )
1345 {
1346         BerElement      *ber;
1347         struct berval   fstr = BER_BVNULL;
1348
1349         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1350                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1351                 return LDAP_PROTOCOL_ERROR;
1352         }
1353
1354         if ( ctrl->ldctl_value.bv_len == 0 ) {
1355                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1356                 return LDAP_PROTOCOL_ERROR;
1357         }
1358
1359         ber = ber_init( &(ctrl->ldctl_value) );
1360         if (ber == NULL) {
1361                 rs->sr_text = "internal error";
1362                 return LDAP_OTHER;
1363         }
1364
1365         rs->sr_err = get_vrFilter( op, ber,
1366                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1367
1368         (void) ber_free( ber, 1 );
1369
1370         if( rs->sr_err != LDAP_SUCCESS ) {
1371                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1372                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1373                         send_ldap_disconnect( op, rs );
1374                         rs->sr_err = SLAPD_DISCONNECT;
1375                 } else {
1376                         send_ldap_result( op, rs );
1377                 }
1378                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1379         }
1380 #ifdef LDAP_DEBUG
1381         else {
1382                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1383         }
1384
1385         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1386                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1387         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1388 #endif
1389
1390         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1391                 ? SLAP_CONTROL_CRITICAL
1392                 : SLAP_CONTROL_NONCRITICAL;
1393
1394         rs->sr_err = LDAP_SUCCESS;
1395         return LDAP_SUCCESS;
1396 }
1397
1398 static int parseSubentries (
1399         Operation *op,
1400         SlapReply *rs,
1401         LDAPControl *ctrl )
1402 {
1403         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1404                 rs->sr_text = "subentries control specified multiple times";
1405                 return LDAP_PROTOCOL_ERROR;
1406         }
1407
1408         /* FIXME: should use BER library */
1409         if( ( ctrl->ldctl_value.bv_len != 3 )
1410                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1411                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1412         {
1413                 rs->sr_text = "subentries control value encoding is bogus";
1414                 return LDAP_PROTOCOL_ERROR;
1415         }
1416
1417         op->o_subentries = ctrl->ldctl_iscritical
1418                 ? SLAP_CONTROL_CRITICAL
1419                 : SLAP_CONTROL_NONCRITICAL;
1420
1421         if (ctrl->ldctl_value.bv_val[2]) {
1422                 set_subentries_visibility( op );
1423         }
1424
1425         return LDAP_SUCCESS;
1426 }
1427
1428 static int parsePermissiveModify (
1429         Operation *op,
1430         SlapReply *rs,
1431         LDAPControl *ctrl )
1432 {
1433         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1434                 rs->sr_text = "permissiveModify control specified multiple times";
1435                 return LDAP_PROTOCOL_ERROR;
1436         }
1437
1438         if ( ctrl->ldctl_value.bv_len ) {
1439                 rs->sr_text = "permissiveModify control value not empty";
1440                 return LDAP_PROTOCOL_ERROR;
1441         }
1442
1443         op->o_permissive_modify = ctrl->ldctl_iscritical
1444                 ? SLAP_CONTROL_CRITICAL
1445                 : SLAP_CONTROL_NONCRITICAL;
1446
1447         return LDAP_SUCCESS;
1448 }
1449
1450 static int parseDomainScope (
1451         Operation *op,
1452         SlapReply *rs,
1453         LDAPControl *ctrl )
1454 {
1455         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1456                 rs->sr_text = "domainScope control specified multiple times";
1457                 return LDAP_PROTOCOL_ERROR;
1458         }
1459
1460         if ( ctrl->ldctl_value.bv_len ) {
1461                 rs->sr_text = "domainScope control value not empty";
1462                 return LDAP_PROTOCOL_ERROR;
1463         }
1464
1465         op->o_domain_scope = ctrl->ldctl_iscritical
1466                 ? SLAP_CONTROL_CRITICAL
1467                 : SLAP_CONTROL_NONCRITICAL;
1468
1469         return LDAP_SUCCESS;
1470 }
1471
1472 #ifdef SLAP_CONTROL_X_TREE_DELETE
1473 static int parseTreeDelete (
1474         Operation *op,
1475         SlapReply *rs,
1476         LDAPControl *ctrl )
1477 {
1478         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1479                 rs->sr_text = "treeDelete control specified multiple times";
1480                 return LDAP_PROTOCOL_ERROR;
1481         }
1482
1483         if ( ctrl->ldctl_value.bv_len ) {
1484                 rs->sr_text = "treeDelete control value not empty";
1485                 return LDAP_PROTOCOL_ERROR;
1486         }
1487
1488         op->o_tree_delete = ctrl->ldctl_iscritical
1489                 ? SLAP_CONTROL_CRITICAL
1490                 : SLAP_CONTROL_NONCRITICAL;
1491
1492         return LDAP_SUCCESS;
1493 }
1494 #endif
1495
1496 static int parseSearchOptions (
1497         Operation *op,
1498         SlapReply *rs,
1499         LDAPControl *ctrl )
1500 {
1501         BerElement *ber;
1502         ber_int_t search_flags;
1503         ber_tag_t tag;
1504
1505         if ( ctrl->ldctl_value.bv_len == 0 ) {
1506                 rs->sr_text = "searchOptions control value is empty (or absent)";
1507                 return LDAP_PROTOCOL_ERROR;
1508         }
1509
1510         ber = ber_init( &ctrl->ldctl_value );
1511         if( ber == NULL ) {
1512                 rs->sr_text = "internal error";
1513                 return LDAP_OTHER;
1514         }
1515
1516         tag = ber_scanf( ber, "{i}", &search_flags );
1517         (void) ber_free( ber, 1 );
1518
1519         if ( tag == LBER_ERROR ) {
1520                 rs->sr_text = "searchOptions control decoding error";
1521                 return LDAP_PROTOCOL_ERROR;
1522         }
1523
1524         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1525                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1526                         rs->sr_text = "searchOptions control specified multiple times "
1527                                 "or with domainScope control";
1528                         return LDAP_PROTOCOL_ERROR;
1529                 }
1530
1531                 op->o_domain_scope = ctrl->ldctl_iscritical
1532                         ? SLAP_CONTROL_CRITICAL
1533                         : SLAP_CONTROL_NONCRITICAL;
1534         }
1535
1536         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1537                 /* Other search flags not recognised so far,
1538                  * including:
1539                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1540                  */
1541                 rs->sr_text = "searchOptions contained unrecognized flag";
1542                 return LDAP_UNWILLING_TO_PERFORM;
1543         }
1544
1545         return LDAP_SUCCESS;
1546 }
1547