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 1998-2007 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 ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 853                 rs->sr_text = "dontUseCopy control value not absent";
 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 ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 877                 rs->sr_text = "relax control value not absent";
 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 ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 899                 rs->sr_text = "manageDSAit control value not absent";
 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 ( BER_BVISNULL( &ctrl->ldctl_value )) {
 924                 rs->sr_text = "proxy authorization control value absent";
 925                 return LDAP_PROTOCOL_ERROR;
 926         }
 927
 928         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
 929                 && BER_BVISEMPTY( &op->o_ndn ) )
 930         {
 931                 rs->sr_text = "anonymous proxied authorization not allowed";
 932                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 933         }
 934
 935         op->o_proxy_authz = ctrl->ldctl_iscritical
 936                 ? SLAP_CONTROL_CRITICAL
 937                 : SLAP_CONTROL_NONCRITICAL;
 938
 939         Debug( LDAP_DEBUG_ARGS,
 940                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 941                 op->o_connid,
 942                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 943                 0 );
 944
 945         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
 946                 Debug( LDAP_DEBUG_TRACE,
 947                         "parseProxyAuthz: conn=%lu anonymous\n",
 948                         op->o_connid, 0, 0 );
 949
 950                 /* anonymous */
 951                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 952                         op->o_ndn.bv_val[ 0 ] = '\0';
 953                 }
 954                 op->o_ndn.bv_len = 0;
 955
 956                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 957                         op->o_dn.bv_val[ 0 ] = '\0';
 958                 }
 959                 op->o_dn.bv_len = 0;
 960
 961                 return LDAP_SUCCESS;
 962         }
 963
 964         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 965                         NULL, &dn, SLAP_GETDN_AUTHZID );
 966
 967         /* FIXME: empty DN in proxyAuthz control should be legal... */
 968         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 969                 if ( dn.bv_val ) {
 970                         ch_free( dn.bv_val );
 971                 }
 972                 rs->sr_text = "authzId mapping failed";
 973                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 974         }
 975
 976         Debug( LDAP_DEBUG_TRACE,
 977                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 978                 op->o_connid,
 979                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 980
 981         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 982
 983         if ( rc ) {
 984                 ch_free( dn.bv_val );
 985                 rs->sr_text = "not authorized to assume identity";
 986                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 987         }
 988
 989         ch_free( op->o_ndn.bv_val );
 990         ch_free( op->o_dn.bv_val );
 991
 992         /*
 993          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 994          * from now on op->o_dn is normalized
 995          */
 996         op->o_ndn = dn;
 997         ber_dupbv( &op->o_dn, &dn );
 998
 999         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
1000             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
1001
1002         return LDAP_SUCCESS;
1003 }
1004
1005 static int parseNoOp (
1006         Operation *op,
1007         SlapReply *rs,
1008         LDAPControl *ctrl )
1009 {
1010         if ( op->o_noop != SLAP_CONTROL_NONE ) {
1011                 rs->sr_text = "noop control specified multiple times";
1012                 return LDAP_PROTOCOL_ERROR;
1013         }
1014
1015         if ( ctrl->ldctl_value.bv_len ) {
1016                 rs->sr_text = "noop control value not empty";
1017                 return LDAP_PROTOCOL_ERROR;
1018         }
1019
1020         op->o_noop = ctrl->ldctl_iscritical
1021                 ? SLAP_CONTROL_CRITICAL
1022                 : SLAP_CONTROL_NONCRITICAL;
1023
1024         return LDAP_SUCCESS;
1025 }
1026
1027 static int parsePagedResults (
1028         Operation *op,
1029         SlapReply *rs,
1030         LDAPControl *ctrl )
1031 {
1032         int             rc = LDAP_SUCCESS;
1033         ber_tag_t       tag;
1034         ber_int_t       size;
1035         BerElement      *ber;
1036         struct berval   cookie = BER_BVNULL;
1037         PagedResultsState       *ps;
1038
1039         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1040                 rs->sr_text = "paged results control specified multiple times";
1041                 return LDAP_PROTOCOL_ERROR;
1042         }
1043
1044         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1045                 rs->sr_text = "paged results control value is absent";
1046                 return LDAP_PROTOCOL_ERROR;
1047         }
1048
1049         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1050                 rs->sr_text = "paged results control value is empty";
1051                 return LDAP_PROTOCOL_ERROR;
1052         }
1053
1054         /* Parse the control value
1055          *      realSearchControlValue ::= SEQUENCE {
1056          *              size    INTEGER (0..maxInt),
1057          *                              -- requested page size from client
1058          *                              -- result set size estimate from server
1059          *              cookie  OCTET STRING
1060          * }
1061          */
1062         ber = ber_init( &ctrl->ldctl_value );
1063         if ( ber == NULL ) {
1064                 rs->sr_text = "internal error";
1065                 return LDAP_OTHER;
1066         }
1067
1068         tag = ber_scanf( ber, "{im}", &size, &cookie );
1069
1070         if ( tag == LBER_ERROR ) {
1071                 rs->sr_text = "paged results control could not be decoded";
1072                 rc = LDAP_PROTOCOL_ERROR;
1073                 goto done;
1074         }
1075
1076         if ( size < 0 ) {
1077                 rs->sr_text = "paged results control size invalid";
1078                 rc = LDAP_PROTOCOL_ERROR;
1079                 goto done;
1080         }
1081
1082         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1083         *ps = op->o_conn->c_pagedresults_state;
1084         ps->ps_size = size;
1085         op->o_pagedresults_state = ps;
1086
1087         /* NOTE: according to RFC 2696 3.:
1088
1089     If the page size is greater than or equal to the sizeLimit value, the
1090     server should ignore the control as the request can be satisfied in a
1091     single page.
1092
1093          * NOTE: this assumes that the op->ors_slimit be set
1094          * before the controls are parsed.
1095          */
1096
1097         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1098                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1099
1100         } else if ( ctrl->ldctl_iscritical ) {
1101                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1102
1103         } else {
1104                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1105         }
1106
1107 done:;
1108         (void)ber_free( ber, 1 );
1109         return rc;
1110 }
1111
1112 #ifdef SLAP_SORTEDRESULTS
1113 static int parseSortedResults (
1114         Operation *op,
1115         SlapReply *rs,
1116         LDAPControl *ctrl )
1117 {
1118         int             rc = LDAP_SUCCESS;
1119
1120         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1121                 rs->sr_text = "sorted results control specified multiple times";
1122                 return LDAP_PROTOCOL_ERROR;
1123         }
1124
1125         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1126                 rs->sr_text = "sorted results control value is absent";
1127                 return LDAP_PROTOCOL_ERROR;
1128         }
1129
1130         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1131                 rs->sr_text = "sorted results control value is empty";
1132                 return LDAP_PROTOCOL_ERROR;
1133         }
1134
1135         /* blow off parsing the value */
1136
1137         op->o_sortedresults = ctrl->ldctl_iscritical
1138                 ? SLAP_CONTROL_CRITICAL
1139                 : SLAP_CONTROL_NONCRITICAL;
1140
1141         return rc;
1142 }
1143 #endif
1144
1145 static int parseAssert (
1146         Operation *op,
1147         SlapReply *rs,
1148         LDAPControl *ctrl )
1149 {
1150         BerElement      *ber;
1151         struct berval   fstr = BER_BVNULL;
1152
1153         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1154                 rs->sr_text = "assert control specified multiple times";
1155                 return LDAP_PROTOCOL_ERROR;
1156         }
1157
1158         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1159                 rs->sr_text = "assert control value is absent";
1160                 return LDAP_PROTOCOL_ERROR;
1161         }
1162
1163         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1164                 rs->sr_text = "assert control value is empty";
1165                 return LDAP_PROTOCOL_ERROR;
1166         }
1167
1168         ber = ber_init( &(ctrl->ldctl_value) );
1169         if (ber == NULL) {
1170                 rs->sr_text = "assert control: internal error";
1171                 return LDAP_OTHER;
1172         }
1173
1174         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1175                 &rs->sr_text);
1176         (void) ber_free( ber, 1 );
1177         if( rs->sr_err != LDAP_SUCCESS ) {
1178                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1179                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1180                         send_ldap_disconnect( op, rs );
1181                         rs->sr_err = SLAPD_DISCONNECT;
1182                 } else {
1183                         send_ldap_result( op, rs );
1184                 }
1185                 if( op->o_assertion != NULL ) {
1186                         filter_free_x( op, op->o_assertion );
1187                 }
1188                 return rs->sr_err;
1189         }
1190
1191 #ifdef LDAP_DEBUG
1192         filter2bv_x( op, op->o_assertion, &fstr );
1193
1194         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1195                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1196         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1197 #endif
1198
1199         op->o_assert = ctrl->ldctl_iscritical
1200                 ? SLAP_CONTROL_CRITICAL
1201                 : SLAP_CONTROL_NONCRITICAL;
1202
1203         rs->sr_err = LDAP_SUCCESS;
1204         return LDAP_SUCCESS;
1205 }
1206
1207 static int parsePreRead (
1208         Operation *op,
1209         SlapReply *rs,
1210         LDAPControl *ctrl )
1211 {
1212         ber_len_t siz, off, i;
1213         AttributeName *an = NULL;
1214         BerElement      *ber;
1215
1216         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1217                 rs->sr_text = "preread control specified multiple times";
1218                 return LDAP_PROTOCOL_ERROR;
1219         }
1220
1221         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1222                 rs->sr_text = "preread control value is absent";
1223                 return LDAP_PROTOCOL_ERROR;
1224         }
1225
1226         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1227                 rs->sr_text = "preread control value is empty";
1228                 return LDAP_PROTOCOL_ERROR;
1229         }
1230
1231 #ifdef LDAP_X_TXN
1232         if ( op->o_txnSpec ) { /* temporary limitation */
1233                 rs->sr_text = "cannot perform pre-read in transaction";
1234                 return LDAP_UNWILLING_TO_PERFORM;
1235         }
1236 #endif
1237
1238         ber = ber_init( &(ctrl->ldctl_value) );
1239         if (ber == NULL) {
1240                 rs->sr_text = "preread control: internal error";
1241                 return LDAP_OTHER;
1242         }
1243
1244         rs->sr_err = LDAP_SUCCESS;
1245
1246         siz = sizeof( AttributeName );
1247         off = offsetof( AttributeName, an_name );
1248         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1249                 rs->sr_text = "preread control: decoding error";
1250                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1251                 goto done;
1252         }
1253
1254         for( i=0; i<siz; i++ ) {
1255                 const char      *dummy = NULL;
1256
1257                 an[i].an_desc = NULL;
1258                 an[i].an_oc = NULL;
1259                 an[i].an_oc_exclude = 0;
1260                 rs->sr_err = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1261                 if ( rs->sr_err != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1262                         rs->sr_text = dummy
1263                                 ? dummy
1264                                 : "postread control: unknown attributeType";
1265                         goto done;
1266                 }
1267         }
1268
1269         op->o_preread = ctrl->ldctl_iscritical
1270                 ? SLAP_CONTROL_CRITICAL
1271                 : SLAP_CONTROL_NONCRITICAL;
1272
1273         op->o_preread_attrs = an;
1274
1275 done:
1276         (void) ber_free( ber, 1 );
1277         return rs->sr_err;
1278 }
1279
1280 static int parsePostRead (
1281         Operation *op,
1282         SlapReply *rs,
1283         LDAPControl *ctrl )
1284 {
1285         ber_len_t siz, off, i;
1286         AttributeName *an = NULL;
1287         BerElement      *ber;
1288
1289         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1290                 rs->sr_text = "postread control specified multiple times";
1291                 return LDAP_PROTOCOL_ERROR;
1292         }
1293
1294         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1295                 rs->sr_text = "postread control value is absent";
1296                 return LDAP_PROTOCOL_ERROR;
1297         }
1298
1299         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1300                 rs->sr_text = "postread control value is empty";
1301                 return LDAP_PROTOCOL_ERROR;
1302         }
1303
1304 #ifdef LDAP_X_TXN
1305         if ( op->o_txnSpec ) { /* temporary limitation */
1306                 rs->sr_text = "cannot perform post-read in transaction";
1307                 return LDAP_UNWILLING_TO_PERFORM;
1308         }
1309 #endif
1310
1311         ber = ber_init( &(ctrl->ldctl_value) );
1312         if (ber == NULL) {
1313                 rs->sr_text = "postread control: internal error";
1314                 return LDAP_OTHER;
1315         }
1316
1317         rs->sr_err = LDAP_SUCCESS;
1318         siz = sizeof( AttributeName );
1319         off = offsetof( AttributeName, an_name );
1320         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1321                 rs->sr_text = "postread control: decoding error";
1322                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1323                 goto done;
1324         }
1325
1326         for ( i = 0; i < siz; i++ ) {
1327                 const char      *dummy = NULL;
1328                 int             rc;
1329
1330                 an[i].an_desc = NULL;
1331                 an[i].an_oc = NULL;
1332                 an[i].an_oc_exclude = 0;
1333                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1334                 if ( rc != LDAP_SUCCESS ) {
1335                         int                     i;
1336                         static struct berval    special_attrs[] = {
1337                                 BER_BVC( LDAP_NO_ATTRS ),
1338                                 BER_BVC( LDAP_ALL_USER_ATTRIBUTES ),
1339                                 BER_BVC( LDAP_ALL_OPERATIONAL_ATTRIBUTES ),
1340                                 BER_BVNULL
1341                         };
1342
1343                         /* deal with special attribute types */
1344                         for ( i = 0; !BER_BVISNULL( &special_attrs[ i ] ); i++ ) {
1345                                 if ( bvmatch( &an[i].an_name, &special_attrs[ i ] ) ) {
1346                                         break;
1347                                 }
1348                         }
1349
1350                         if ( BER_BVISNULL( &special_attrs[ i ] ) && ctrl->ldctl_iscritical ) {
1351                                 rs->sr_err = rc;
1352                                 rs->sr_text = dummy
1353                                         ? dummy
1354                                         : "postread control: unknown attributeType";
1355                                 goto done;
1356                         }
1357                 }
1358         }
1359
1360         op->o_postread = ctrl->ldctl_iscritical
1361                 ? SLAP_CONTROL_CRITICAL
1362                 : SLAP_CONTROL_NONCRITICAL;
1363
1364         op->o_postread_attrs = an;
1365
1366 done:
1367         (void) ber_free( ber, 1 );
1368         return rs->sr_err;
1369 }
1370
1371 static int parseValuesReturnFilter (
1372         Operation *op,
1373         SlapReply *rs,
1374         LDAPControl *ctrl )
1375 {
1376         BerElement      *ber;
1377         struct berval   fstr = BER_BVNULL;
1378
1379         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1380                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1381                 return LDAP_PROTOCOL_ERROR;
1382         }
1383
1384         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1385                 rs->sr_text = "valuesReturnFilter control value is absent";
1386                 return LDAP_PROTOCOL_ERROR;
1387         }
1388
1389         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1390                 rs->sr_text = "valuesReturnFilter control value is empty";
1391                 return LDAP_PROTOCOL_ERROR;
1392         }
1393
1394         ber = ber_init( &(ctrl->ldctl_value) );
1395         if (ber == NULL) {
1396                 rs->sr_text = "internal error";
1397                 return LDAP_OTHER;
1398         }
1399
1400         rs->sr_err = get_vrFilter( op, ber,
1401                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1402
1403         (void) ber_free( ber, 1 );
1404
1405         if( rs->sr_err != LDAP_SUCCESS ) {
1406                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1407                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1408                         send_ldap_disconnect( op, rs );
1409                         rs->sr_err = SLAPD_DISCONNECT;
1410                 } else {
1411                         send_ldap_result( op, rs );
1412                 }
1413                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1414         }
1415 #ifdef LDAP_DEBUG
1416         else {
1417                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1418         }
1419
1420         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1421                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1422         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1423 #endif
1424
1425         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1426                 ? SLAP_CONTROL_CRITICAL
1427                 : SLAP_CONTROL_NONCRITICAL;
1428
1429         rs->sr_err = LDAP_SUCCESS;
1430         return LDAP_SUCCESS;
1431 }
1432
1433 static int parseSubentries (
1434         Operation *op,
1435         SlapReply *rs,
1436         LDAPControl *ctrl )
1437 {
1438         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1439                 rs->sr_text = "subentries control specified multiple times";
1440                 return LDAP_PROTOCOL_ERROR;
1441         }
1442
1443         /* FIXME: should use BER library */
1444         if( ( ctrl->ldctl_value.bv_len != 3 )
1445                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1446                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1447         {
1448                 rs->sr_text = "subentries control value encoding is bogus";
1449                 return LDAP_PROTOCOL_ERROR;
1450         }
1451
1452         op->o_subentries = ctrl->ldctl_iscritical
1453                 ? SLAP_CONTROL_CRITICAL
1454                 : SLAP_CONTROL_NONCRITICAL;
1455
1456         if (ctrl->ldctl_value.bv_val[2]) {
1457                 set_subentries_visibility( op );
1458         }
1459
1460         return LDAP_SUCCESS;
1461 }
1462
1463 static int parsePermissiveModify (
1464         Operation *op,
1465         SlapReply *rs,
1466         LDAPControl *ctrl )
1467 {
1468         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1469                 rs->sr_text = "permissiveModify control specified multiple times";
1470                 return LDAP_PROTOCOL_ERROR;
1471         }
1472
1473         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1474                 rs->sr_text = "permissiveModify control value not absent";
1475                 return LDAP_PROTOCOL_ERROR;
1476         }
1477
1478         op->o_permissive_modify = ctrl->ldctl_iscritical
1479                 ? SLAP_CONTROL_CRITICAL
1480                 : SLAP_CONTROL_NONCRITICAL;
1481
1482         return LDAP_SUCCESS;
1483 }
1484
1485 static int parseDomainScope (
1486         Operation *op,
1487         SlapReply *rs,
1488         LDAPControl *ctrl )
1489 {
1490         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1491                 rs->sr_text = "domainScope control specified multiple times";
1492                 return LDAP_PROTOCOL_ERROR;
1493         }
1494
1495         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1496                 rs->sr_text = "domainScope control value not empty";
1497                 return LDAP_PROTOCOL_ERROR;
1498         }
1499
1500         op->o_domain_scope = ctrl->ldctl_iscritical
1501                 ? SLAP_CONTROL_CRITICAL
1502                 : SLAP_CONTROL_NONCRITICAL;
1503
1504         return LDAP_SUCCESS;
1505 }
1506
1507 #ifdef SLAP_CONTROL_X_TREE_DELETE
1508 static int parseTreeDelete (
1509         Operation *op,
1510         SlapReply *rs,
1511         LDAPControl *ctrl )
1512 {
1513         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1514                 rs->sr_text = "treeDelete control specified multiple times";
1515                 return LDAP_PROTOCOL_ERROR;
1516         }
1517
1518         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1519                 rs->sr_text = "treeDelete control value not absent";
1520                 return LDAP_PROTOCOL_ERROR;
1521         }
1522
1523         op->o_tree_delete = ctrl->ldctl_iscritical
1524                 ? SLAP_CONTROL_CRITICAL
1525                 : SLAP_CONTROL_NONCRITICAL;
1526
1527         return LDAP_SUCCESS;
1528 }
1529 #endif
1530
1531 static int parseSearchOptions (
1532         Operation *op,
1533         SlapReply *rs,
1534         LDAPControl *ctrl )
1535 {
1536         BerElement *ber;
1537         ber_int_t search_flags;
1538         ber_tag_t tag;
1539
1540         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1541                 rs->sr_text = "searchOptions control value is absent";
1542                 return LDAP_PROTOCOL_ERROR;
1543         }
1544
1545         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1546                 rs->sr_text = "searchOptions control value is empty";
1547                 return LDAP_PROTOCOL_ERROR;
1548         }
1549
1550         ber = ber_init( &ctrl->ldctl_value );
1551         if( ber == NULL ) {
1552                 rs->sr_text = "internal error";
1553                 return LDAP_OTHER;
1554         }
1555
1556         tag = ber_scanf( ber, "{i}", &search_flags );
1557         (void) ber_free( ber, 1 );
1558
1559         if ( tag == LBER_ERROR ) {
1560                 rs->sr_text = "searchOptions control decoding error";
1561                 return LDAP_PROTOCOL_ERROR;
1562         }
1563
1564         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1565                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1566                         rs->sr_text = "searchOptions control specified multiple times "
1567                                 "or with domainScope control";
1568                         return LDAP_PROTOCOL_ERROR;
1569                 }
1570
1571                 op->o_domain_scope = ctrl->ldctl_iscritical
1572                         ? SLAP_CONTROL_CRITICAL
1573                         : SLAP_CONTROL_NONCRITICAL;
1574         }
1575
1576         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1577                 /* Other search flags not recognised so far,
1578                  * including:
1579                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1580                  */
1581                 rs->sr_text = "searchOptions contained unrecognized flag";
1582                 return LDAP_UNWILLING_TO_PERFORM;
1583         }
1584
1585         return LDAP_SUCCESS;
1586 }
1587