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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 #include "portable.h"
  17
  18 #include <stdio.h>
  19
  20 #include <ac/string.h>
  21 #include <ac/socket.h>
  22
  23 #include "slap.h"
  24
  25 #include "../../libraries/liblber/lber-int.h"
  26
  27 static SLAP_CTRL_PARSE_FN parseAssert;
  28 static SLAP_CTRL_PARSE_FN parsePreRead;
  29 static SLAP_CTRL_PARSE_FN parsePostRead;
  30 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  31 #ifdef LDAP_DEVEL
  32 static SLAP_CTRL_PARSE_FN parseDontUseCopy;
  33 static SLAP_CTRL_PARSE_FN parseManageDIT;
  34 #endif
  35 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  36 static SLAP_CTRL_PARSE_FN parseNoOp;
  37 static SLAP_CTRL_PARSE_FN parsePagedResults;
  38 #ifdef LDAP_DEVEL
  39 static SLAP_CTRL_PARSE_FN parseSortedResults;
  40 #endif
  41 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  42 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  43 static SLAP_CTRL_PARSE_FN parseDomainScope;
  44 #ifdef SLAP_CONTROL_X_TREE_DELETE
  45 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  46 #endif
  47 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  48 static SLAP_CTRL_PARSE_FN parseSubentries;
  49
  50 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  51
  52 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  53 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  54
  55 struct slap_control_ids slap_cids;
  56
  57 struct slap_control {
  58         /* Control OID */
  59         char *sc_oid;
  60
  61         /* The controlID for this control */
  62         int sc_cid;
  63
  64         /* Operations supported by control */
  65         slap_mask_t sc_mask;
  66
  67         /* Extended operations supported by control */
  68         char **sc_extendedops;          /* input */
  69         BerVarray sc_extendedopsbv;     /* run-time use */
  70
  71         /* Control parsing callback */
  72         SLAP_CTRL_PARSE_FN *sc_parse;
  73
  74         LDAP_SLIST_ENTRY(slap_control) sc_next;
  75 };
  76
  77 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  78         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  79
  80 /*
  81  * all known request control OIDs should be added to this list
  82  */
  83 /*
  84  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  85  * addresses an undefined control; this allows to safely test for
  86  * well known controls even if they are not registered, e.g. if
  87  * they get moved to modules.  An example is sc_LDAPsync, which
  88  * is implemented in the syncprov overlay and thus, if configured
  89  * as dynamic module, may not be registered.  One side effect is that
  90  * slap_known_controls[0] == NULL, so it should always be used
  91  * starting from 1.
  92  * FIXME: should we define the "undefined control" oid?
  93  */
  94 char *slap_known_controls[SLAP_MAX_CIDS+1];
  95 static int num_known_controls = 1;
  96
  97 static char *proxy_authz_extops[] = {
  98         LDAP_EXOP_MODIFY_PASSWD,
  99         LDAP_EXOP_X_WHO_AM_I,
 100         LDAP_EXOP_REFRESH,
 101         NULL
 102 };
 103
 104 static char *manageDSAit_extops[] = {
 105         LDAP_EXOP_REFRESH,
 106         NULL
 107 };
 108
 109 static struct slap_control control_defs[] = {
 110         {  LDAP_CONTROL_ASSERT,
 111                 (int)offsetof(struct slap_control_ids, sc_assert),
 112                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
 113                         SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
 114                 NULL, NULL,
 115                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 116         { LDAP_CONTROL_PRE_READ,
 117                 (int)offsetof(struct slap_control_ids, sc_preRead),
 118                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 119                 NULL, NULL,
 120                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 121         { LDAP_CONTROL_POST_READ,
 122                 (int)offsetof(struct slap_control_ids, sc_postRead),
 123                 SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 124                 NULL, NULL,
 125                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 126         { LDAP_CONTROL_VALUESRETURNFILTER,
 127                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 128                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH,
 129                 NULL, NULL,
 130                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 131         { LDAP_CONTROL_PAGEDRESULTS,
 132                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 133                 SLAP_CTRL_SEARCH,
 134                 NULL, NULL,
 135                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 136 #ifdef LDAP_DEVEL
 137         { LDAP_CONTROL_SORTREQUEST,
 138                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 139                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 140                 NULL, NULL,
 141                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 142 #endif
 143         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 144                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 145                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 146                 NULL, NULL,
 147                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 148         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 149                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 150                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
 151                 NULL, NULL,
 152                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 153 #ifdef SLAP_CONTROL_X_TREE_DELETE
 154         { LDAP_CONTROL_X_TREE_DELETE,
 155                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 156                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
 157                 NULL, NULL,
 158                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 159 #endif
 160         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 161                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 162                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 163                 NULL, NULL,
 164                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 165         { LDAP_CONTROL_SUBENTRIES,
 166                 (int)offsetof(struct slap_control_ids, sc_subentries),
 167                 SLAP_CTRL_SEARCH,
 168                 NULL, NULL,
 169                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 170         { LDAP_CONTROL_NOOP,
 171                 (int)offsetof(struct slap_control_ids, sc_noOp),
 172                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 173                 NULL, NULL,
 174                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 175 #ifdef LDAP_DEVEL
 176         { LDAP_CONTROL_DONTUSECOPY,
 177                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 178                 SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
 179                 NULL, NULL,
 180                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 181         { LDAP_CONTROL_MANAGEDIT,
 182                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 183                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 184                 NULL, NULL,
 185                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 186 #endif
 187         { LDAP_CONTROL_MANAGEDSAIT,
 188                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 189                 SLAP_CTRL_ACCESS,
 190                 manageDSAit_extops, NULL,
 191                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 192         { LDAP_CONTROL_PROXY_AUTHZ,
 193                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 194                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
 195                 proxy_authz_extops, NULL,
 196                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 197         { NULL, 0, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 198 };
 199
 200 static struct slap_control *
 201 find_ctrl( const char *oid );
 202
 203 /*
 204  * Register a supported control.
 205  *
 206  * This can be called by an OpenLDAP plugin or, indirectly, by a
 207  * SLAPI plugin calling slapi_register_supported_control().
 208  *
 209  * NOTE: if flags == 1 the control is replaced if already registered;
 210  * otherwise registering an already registered control is not allowed.
 211  */
 212 int
 213 register_supported_control2(const char *controloid,
 214         slap_mask_t controlmask,
 215         char **controlexops,
 216         SLAP_CTRL_PARSE_FN *controlparsefn,
 217         unsigned flags,
 218         int *controlcid)
 219 {
 220         struct slap_control *sc = NULL;
 221         int i;
 222         BerVarray extendedopsbv = NULL;
 223
 224         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 225                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 226                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 227                 SLAP_MAX_CIDS, 0, 0 );
 228                 return LDAP_OTHER;
 229         }
 230
 231         if ( controloid == NULL ) {
 232                 return LDAP_PARAM_ERROR;
 233         }
 234
 235         /* check if already registered */
 236         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 237                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 238                         if ( flags == 1 ) {
 239                                 Debug( LDAP_DEBUG_TRACE,
 240                                         "Control %s already registered; replacing.\n",
 241                                         controloid, 0, 0 );
 242                                 /* (find and) replace existing handler */
 243                                 sc = find_ctrl( controloid );
 244                                 assert( sc != NULL );
 245                                 break;
 246                         }
 247
 248                         Debug( LDAP_DEBUG_ANY,
 249                                 "Control %s already registered.\n",
 250                                 controloid, 0, 0 );
 251                         return LDAP_PARAM_ERROR;
 252                 }
 253         }
 254
 255         /* turn compatible extended operations into bervals */
 256         if ( controlexops != NULL ) {
 257                 int i;
 258
 259                 for ( i = 0; controlexops[ i ]; i++ );
 260
 261                 extendedopsbv = ber_memcalloc( i + 1, sizeof( struct berval ) );
 262                 if ( extendedopsbv == NULL ) {
 263                         return LDAP_NO_MEMORY;
 264                 }
 265
 266                 for ( i = 0; controlexops[ i ]; i++ ) {
 267                         ber_str2bv( controlexops[ i ], 0, 1, &extendedopsbv[ i ] );
 268                 }
 269         }
 270
 271         if ( sc == NULL ) {
 272                 sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 273                 if ( sc == NULL ) {
 274                         return LDAP_NO_MEMORY;
 275                 }
 276
 277                 sc->sc_oid = ch_strdup( controloid );
 278                 sc->sc_cid = num_known_controls;
 279
 280                 /* Update slap_known_controls, too. */
 281                 slap_known_controls[num_known_controls - 1] = sc->sc_oid;
 282                 slap_known_controls[num_known_controls++] = NULL;
 283
 284                 LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 285                 LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 286
 287         } else {
 288                 if ( sc->sc_extendedopsbv ) {
 289                         ber_bvarray_free( sc->sc_extendedops );
 290                         sc->sc_extendedops = NULL;
 291                 }
 292         }
 293
 294         sc->sc_extendedopsbv = extendedopsbv;
 295         sc->sc_mask = controlmask;
 296         sc->sc_parse = controlparsefn;
 297         if ( controlcid ) {
 298                 *controlcid = sc->sc_cid;
 299         }
 300
 301         return LDAP_SUCCESS;
 302 }
 303
 304 /*
 305  * One-time initialization of internal controls.
 306  */
 307 int
 308 slap_controls_init( void )
 309 {
 310         int i, rc;
 311
 312         rc = LDAP_SUCCESS;
 313
 314         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 315                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 316                 rc = register_supported_control( control_defs[i].sc_oid,
 317                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 318                         control_defs[i].sc_parse, cid );
 319                 if ( rc != LDAP_SUCCESS ) break;
 320         }
 321
 322         return rc;
 323 }
 324
 325 /*
 326  * Free memory associated with list of supported controls.
 327  */
 328 void
 329 controls_destroy( void )
 330 {
 331         struct slap_control *sc;
 332
 333         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 334                 sc = LDAP_SLIST_FIRST(&controls_list);
 335                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 336
 337                 ch_free( sc->sc_oid );
 338                 if ( sc->sc_extendedopsbv != NULL ) {
 339                         ber_bvarray_free( sc->sc_extendedopsbv );
 340                 }
 341                 ch_free( sc );
 342         }
 343 }
 344
 345 /*
 346  * Format the supportedControl attribute of the root DSE,
 347  * detailing which controls are supported by the directory
 348  * server.
 349  */
 350 int
 351 controls_root_dse_info( Entry *e )
 352 {
 353         AttributeDescription *ad_supportedControl
 354                 = slap_schema.si_ad_supportedControl;
 355         struct berval vals[2];
 356         struct slap_control *sc;
 357
 358         vals[1].bv_val = NULL;
 359         vals[1].bv_len = 0;
 360
 361         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 362                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 363
 364                 vals[0].bv_val = sc->sc_oid;
 365                 vals[0].bv_len = strlen( sc->sc_oid );
 366
 367                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 368                         return -1;
 369                 }
 370         }
 371
 372         return 0;
 373 }
 374
 375 /*
 376  * Return a list of OIDs and operation masks for supported
 377  * controls. Used by SLAPI.
 378  */
 379 int
 380 get_supported_controls(char ***ctrloidsp,
 381         slap_mask_t **ctrlmasks)
 382 {
 383         int n;
 384         char **oids;
 385         slap_mask_t *masks;
 386         struct slap_control *sc;
 387
 388         n = 0;
 389
 390         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 391                 n++;
 392         }
 393
 394         if ( n == 0 ) {
 395                 *ctrloidsp = NULL;
 396                 *ctrlmasks = NULL;
 397                 return LDAP_SUCCESS;
 398         }
 399
 400         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 401         if ( oids == NULL ) {
 402                 return LDAP_NO_MEMORY;
 403         }
 404         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 405         if  ( masks == NULL ) {
 406                 ch_free( oids );
 407                 return LDAP_NO_MEMORY;
 408         }
 409
 410         n = 0;
 411
 412         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 413                 oids[n] = ch_strdup( sc->sc_oid );
 414                 masks[n] = sc->sc_mask;
 415                 n++;
 416         }
 417         oids[n] = NULL;
 418         masks[n] = 0;
 419
 420         *ctrloidsp = oids;
 421         *ctrlmasks = masks;
 422
 423         return LDAP_SUCCESS;
 424 }
 425
 426 /*
 427  * Find a control given its OID.
 428  */
 429 static struct slap_control *
 430 find_ctrl( const char *oid )
 431 {
 432         struct slap_control *sc;
 433
 434         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 435                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 436                         return sc;
 437                 }
 438         }
 439
 440         return NULL;
 441 }
 442
 443 int
 444 slap_find_control_id(
 445         const char *oid,
 446         int *cid )
 447 {
 448         struct slap_control *ctrl = find_ctrl( oid );
 449         if ( ctrl ) {
 450                 if ( cid ) *cid = ctrl->sc_cid;
 451                 return LDAP_SUCCESS;
 452         }
 453         return LDAP_CONTROL_NOT_FOUND;
 454 }
 455
 456 int
 457 slap_global_control( Operation *op, const char *oid, int *cid )
 458 {
 459         struct slap_control *ctrl = find_ctrl( oid );
 460
 461         if ( ctrl == NULL ) {
 462                 /* should not be reachable */
 463                 Debug( LDAP_DEBUG_ANY,
 464                         "slap_global_control: unrecognized control: %s\n",
 465                         oid, 0, 0 );
 466                 return LDAP_CONTROL_NOT_FOUND;
 467         }
 468
 469         if ( cid ) *cid = ctrl->sc_cid;
 470
 471         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 472                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 473                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 474         {
 475                 return LDAP_COMPARE_TRUE;
 476         }
 477
 478         Debug( LDAP_DEBUG_TRACE,
 479                 "slap_global_control: unavailable control: %s\n",
 480                 oid, 0, 0 );
 481
 482         return LDAP_COMPARE_FALSE;
 483 }
 484
 485 void slap_free_ctrls(
 486         Operation *op,
 487         LDAPControl **ctrls )
 488 {
 489         int i;
 490
 491         for (i=0; ctrls[i]; i++) {
 492                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 493         }
 494         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 495 }
 496
 497 int slap_parse_ctrl(
 498         Operation *op,
 499         SlapReply *rs,
 500         LDAPControl *control,
 501         const char **text )
 502 {
 503         struct slap_control *sc;
 504
 505         sc = find_ctrl( control->ldctl_oid );
 506         if( sc != NULL ) {
 507                 /* recognized control */
 508                 slap_mask_t tagmask;
 509                 switch( op->o_tag ) {
 510                 case LDAP_REQ_ADD:
 511                         tagmask = SLAP_CTRL_ADD;
 512                         break;
 513                 case LDAP_REQ_BIND:
 514                         tagmask = SLAP_CTRL_BIND;
 515                         break;
 516                 case LDAP_REQ_COMPARE:
 517                         tagmask = SLAP_CTRL_COMPARE;
 518                         break;
 519                 case LDAP_REQ_DELETE:
 520                         tagmask = SLAP_CTRL_DELETE;
 521                         break;
 522                 case LDAP_REQ_MODIFY:
 523                         tagmask = SLAP_CTRL_MODIFY;
 524                         break;
 525                 case LDAP_REQ_RENAME:
 526                         tagmask = SLAP_CTRL_RENAME;
 527                         break;
 528                 case LDAP_REQ_SEARCH:
 529                         tagmask = SLAP_CTRL_SEARCH;
 530                         break;
 531                 case LDAP_REQ_UNBIND:
 532                         tagmask = SLAP_CTRL_UNBIND;
 533                         break;
 534                 case LDAP_REQ_ABANDON:
 535                         tagmask = SLAP_CTRL_ABANDON;
 536                         break;
 537                 case LDAP_REQ_EXTENDED:
 538                         tagmask=~0L;
 539                         assert( op->ore_reqoid.bv_val != NULL );
 540                         if( sc->sc_extendedopsbv != NULL ) {
 541                                 int i;
 542                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 543                                         if( bvmatch( &op->ore_reqoid,
 544                                                 &sc->sc_extendedopsbv[i] ) )
 545                                         {
 546                                                 tagmask=0L;
 547                                                 break;
 548                                         }
 549                                 }
 550                         }
 551                         break;
 552                 default:
 553                         *text = "controls internal error";
 554                         return LDAP_OTHER;
 555                 }
 556
 557                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 558                         /* available extension */
 559                         int     rc;
 560
 561                         if( !sc->sc_parse ) {
 562                                 *text = "not yet implemented";
 563                                 return LDAP_OTHER;
 564                         }
 565
 566                         rc = sc->sc_parse( op, rs, control );
 567                         if ( rc ) {
 568                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 569                                 return rc;
 570                         }
 571
 572                 } else if( control->ldctl_iscritical ) {
 573                         /* unavailable CRITICAL control */
 574                         *text = "critical extension is unavailable";
 575                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 576                 }
 577         } else if( control->ldctl_iscritical ) {
 578                 /* unrecognized CRITICAL control */
 579                 *text = "critical extension is not recognized";
 580                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 581         }
 582
 583         return LDAP_SUCCESS;
 584 }
 585
 586 int get_ctrls(
 587         Operation *op,
 588         SlapReply *rs,
 589         int sendres )
 590 {
 591         int nctrls = 0;
 592         ber_tag_t tag;
 593         ber_len_t len;
 594         char *opaque;
 595         BerElement *ber = op->o_ber;
 596         struct berval bv;
 597
 598         len = ber_pvt_ber_remaining(ber);
 599
 600         if( len == 0) {
 601                 /* no controls */
 602                 rs->sr_err = LDAP_SUCCESS;
 603                 return rs->sr_err;
 604         }
 605
 606         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 607                 if( tag == LBER_ERROR ) {
 608                         rs->sr_err = SLAPD_DISCONNECT;
 609                         rs->sr_text = "unexpected data in PDU";
 610                 }
 611
 612                 goto return_results;
 613         }
 614
 615         Debug( LDAP_DEBUG_TRACE,
 616                 "=> get_ctrls\n", 0, 0, 0 );
 617
 618         if( op->o_protocol < LDAP_VERSION3 ) {
 619                 rs->sr_err = SLAPD_DISCONNECT;
 620                 rs->sr_text = "controls require LDAPv3";
 621                 goto return_results;
 622         }
 623
 624         /* one for first control, one for termination */
 625         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 626
 627 #if 0
 628         if( op->ctrls == NULL ) {
 629                 rs->sr_err = LDAP_NO_MEMORY;
 630                 rs->sr_text = "no memory";
 631                 goto return_results;
 632         }
 633 #endif
 634
 635         op->o_ctrls[nctrls] = NULL;
 636
 637         /* step through each element */
 638         for( tag = ber_first_element( ber, &len, &opaque );
 639                 tag != LBER_ERROR;
 640                 tag = ber_next_element( ber, &len, opaque ) )
 641         {
 642                 LDAPControl *c;
 643                 LDAPControl **tctrls;
 644
 645                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 646                 memset(c, 0, sizeof(LDAPControl));
 647
 648                 /* allocate pointer space for current controls (nctrls)
 649                  * + this control + extra NULL
 650                  */
 651                 tctrls = op->o_tmprealloc( op->o_ctrls,
 652                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 653
 654 #if 0
 655                 if( tctrls == NULL ) {
 656                         ch_free( c );
 657                         ldap_controls_free(op->o_ctrls);
 658                         op->o_ctrls = NULL;
 659
 660                         rs->sr_err = LDAP_NO_MEMORY;
 661                         rs->sr_text = "no memory";
 662                         goto return_results;
 663                 }
 664 #endif
 665                 op->o_ctrls = tctrls;
 666
 667                 op->o_ctrls[nctrls++] = c;
 668                 op->o_ctrls[nctrls] = NULL;
 669
 670                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 671                 c->ldctl_oid = bv.bv_val;
 672
 673                 if( tag == LBER_ERROR ) {
 674                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 675                                 0, 0, 0 );
 676
 677                         slap_free_ctrls( op, op->o_ctrls );
 678                         op->o_ctrls = NULL;
 679                         rs->sr_err = SLAPD_DISCONNECT;
 680                         rs->sr_text = "decoding controls error";
 681                         goto return_results;
 682
 683                 } else if( c->ldctl_oid == NULL ) {
 684                         Debug( LDAP_DEBUG_TRACE,
 685                                 "get_ctrls: conn %lu got emtpy OID.\n",
 686                                 op->o_connid, 0, 0 );
 687
 688                         slap_free_ctrls( op, op->o_ctrls );
 689                         op->o_ctrls = NULL;
 690                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 691                         rs->sr_text = "OID field is empty";
 692                         goto return_results;
 693                 }
 694
 695                 tag = ber_peek_tag( ber, &len );
 696
 697                 if( tag == LBER_BOOLEAN ) {
 698                         ber_int_t crit;
 699                         tag = ber_scanf( ber, "b", &crit );
 700
 701                         if( tag == LBER_ERROR ) {
 702                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 703                                         0, 0, 0 );
 704                                 slap_free_ctrls( op, op->o_ctrls );
 705                                 op->o_ctrls = NULL;
 706                                 rs->sr_err = SLAPD_DISCONNECT;
 707                                 rs->sr_text = "decoding controls error";
 708                                 goto return_results;
 709                         }
 710
 711                         c->ldctl_iscritical = (crit != 0);
 712                         tag = ber_peek_tag( ber, &len );
 713                 }
 714
 715                 if( tag == LBER_OCTETSTRING ) {
 716                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 717
 718                         if( tag == LBER_ERROR ) {
 719                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 720                                         "%s (%scritical): get value failed.\n",
 721                                         op->o_connid, c->ldctl_oid,
 722                                         c->ldctl_iscritical ? "" : "non" );
 723                                 slap_free_ctrls( op, op->o_ctrls );
 724                                 op->o_ctrls = NULL;
 725                                 rs->sr_err = SLAPD_DISCONNECT;
 726                                 rs->sr_text = "decoding controls error";
 727                                 goto return_results;
 728                         }
 729                 }
 730
 731                 Debug( LDAP_DEBUG_TRACE,
 732                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 733                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 734
 735                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 736                 if ( rs->sr_err != LDAP_SUCCESS ) {
 737                         goto return_results;
 738                 }
 739         }
 740
 741 return_results:
 742         Debug( LDAP_DEBUG_TRACE,
 743                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 744                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 745
 746         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 747                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 748                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 749                         send_ldap_disconnect( op, rs );
 750                         rs->sr_err = SLAPD_DISCONNECT;
 751                 } else {
 752                         send_ldap_result( op, rs );
 753                 }
 754         }
 755
 756         return rs->sr_err;
 757 }
 758
 759 int
 760 slap_remove_control(
 761         Operation       *op,
 762         SlapReply       *rs,
 763         int             ctrl,
 764         BI_chk_controls fnc )
 765 {
 766         int             i, j;
 767
 768         switch ( op->o_ctrlflag[ ctrl ] ) {
 769         case SLAP_CONTROL_NONCRITICAL:
 770                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 771                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 772                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 773                         {
 774                                 j = i;
 775                         }
 776                 }
 777
 778                 if ( j == -1 ) {
 779                         rs->sr_err = LDAP_OTHER;
 780                         break;
 781                 }
 782
 783                 if ( fnc ) {
 784                         (void)fnc( op, rs );
 785                 }
 786
 787                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 788
 789                 if ( i > 1 ) {
 790                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 791                                 ( i - j ) * sizeof( LDAPControl * ) );
 792
 793                 } else {
 794                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 795                         op->o_ctrls = NULL;
 796                 }
 797
 798                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 799
 800                 Debug( LDAP_DEBUG_ANY, "%s: "
 801                         "non-critical control \"%s\" not supported; stripped.\n",
 802                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 803                 /* fall thru */
 804
 805         case SLAP_CONTROL_IGNORED:
 806         case SLAP_CONTROL_NONE:
 807                 rs->sr_err = SLAP_CB_CONTINUE;
 808                 break;
 809
 810         case SLAP_CONTROL_CRITICAL:
 811                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 812                 if ( fnc ) {
 813                         (void)fnc( op, rs );
 814                 }
 815                 Debug( LDAP_DEBUG_ANY, "%s: "
 816                         "critical control \"%s\" not supported.\n",
 817                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 818                 break;
 819
 820         default:
 821                 /* handle all cases! */
 822                 assert( 0 );
 823         }
 824
 825         return rs->sr_err;
 826 }
 827
 828 #ifdef LDAP_DEVEL
 829 static int parseDontUseCopy (
 830         Operation *op,
 831         SlapReply *rs,
 832         LDAPControl *ctrl )
 833 {
 834         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 835                 rs->sr_text = "dontUseCopy control specified multiple times";
 836                 return LDAP_PROTOCOL_ERROR;
 837         }
 838
 839         if ( ctrl->ldctl_value.bv_len ) {
 840                 rs->sr_text = "dontUseCopy control value not empty";
 841                 return LDAP_PROTOCOL_ERROR;
 842         }
 843
 844         if ( ctrl->ldctl_iscritical != SLAP_CONTROL_CRITICAL ) {
 845                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 846                 return LDAP_PROTOCOL_ERROR;
 847         }
 848
 849         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 850         return LDAP_SUCCESS;
 851 }
 852
 853 static int parseManageDIT (
 854         Operation *op,
 855         SlapReply *rs,
 856         LDAPControl *ctrl )
 857 {
 858         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 859                 rs->sr_text = "manageDIT control specified multiple times";
 860                 return LDAP_PROTOCOL_ERROR;
 861         }
 862
 863         if ( ctrl->ldctl_value.bv_len ) {
 864                 rs->sr_text = "manageDIT control value not empty";
 865                 return LDAP_PROTOCOL_ERROR;
 866         }
 867
 868         op->o_managedit = ctrl->ldctl_iscritical
 869                 ? SLAP_CONTROL_CRITICAL
 870                 : SLAP_CONTROL_NONCRITICAL;
 871
 872         return LDAP_SUCCESS;
 873 }
 874 #endif
 875
 876 static int parseManageDSAit (
 877         Operation *op,
 878         SlapReply *rs,
 879         LDAPControl *ctrl )
 880 {
 881         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 882                 rs->sr_text = "manageDSAit control specified multiple times";
 883                 return LDAP_PROTOCOL_ERROR;
 884         }
 885
 886         if ( ctrl->ldctl_value.bv_len ) {
 887                 rs->sr_text = "manageDSAit control value not empty";
 888                 return LDAP_PROTOCOL_ERROR;
 889         }
 890
 891         op->o_managedsait = ctrl->ldctl_iscritical
 892                 ? SLAP_CONTROL_CRITICAL
 893                 : SLAP_CONTROL_NONCRITICAL;
 894
 895         return LDAP_SUCCESS;
 896 }
 897
 898 static int parseProxyAuthz (
 899         Operation *op,
 900         SlapReply *rs,
 901         LDAPControl *ctrl )
 902 {
 903         int             rc;
 904         struct berval   dn = BER_BVNULL;
 905
 906         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 907                 rs->sr_text = "proxy authorization control specified multiple times";
 908                 return LDAP_PROTOCOL_ERROR;
 909         }
 910
 911         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
 912                 && BER_BVISEMPTY( &op->o_ndn ) )
 913         {
 914                 rs->sr_text = "anonymous proxyAuthz not allowed";
 915                 return LDAP_PROXY_AUTHZ_FAILURE;
 916         }
 917
 918         op->o_proxy_authz = ctrl->ldctl_iscritical
 919                 ? SLAP_CONTROL_CRITICAL
 920                 : SLAP_CONTROL_NONCRITICAL;
 921
 922         Debug( LDAP_DEBUG_ARGS,
 923                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 924                 op->o_connid,
 925                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 926                 0 );
 927
 928         if ( ctrl->ldctl_value.bv_len == 0 ) {
 929                 Debug( LDAP_DEBUG_TRACE,
 930                         "parseProxyAuthz: conn=%lu anonymous\n",
 931                         op->o_connid, 0, 0 );
 932
 933                 /* anonymous */
 934                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 935                         op->o_ndn.bv_val[ 0 ] = '\0';
 936                 }
 937                 op->o_ndn.bv_len = 0;
 938
 939                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 940                         op->o_dn.bv_val[ 0 ] = '\0';
 941                 }
 942                 op->o_dn.bv_len = 0;
 943
 944                 return LDAP_SUCCESS;
 945         }
 946
 947         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 948                         NULL, &dn, SLAP_GETDN_AUTHZID );
 949
 950         /* FIXME: empty DN in proxyAuthz control should be legal... */
 951         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 952                 if ( dn.bv_val ) {
 953                         ch_free( dn.bv_val );
 954                 }
 955                 rs->sr_text = "authzId mapping failed";
 956                 return LDAP_PROXY_AUTHZ_FAILURE;
 957         }
 958
 959         Debug( LDAP_DEBUG_TRACE,
 960                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 961                 op->o_connid,
 962                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 963
 964         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 965
 966         if ( rc ) {
 967                 ch_free( dn.bv_val );
 968                 rs->sr_text = "not authorized to assume identity";
 969                 return LDAP_PROXY_AUTHZ_FAILURE;
 970         }
 971
 972         ch_free( op->o_ndn.bv_val );
 973         ch_free( op->o_dn.bv_val );
 974
 975         /*
 976          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 977          * from now on op->o_dn is normalized
 978          */
 979         op->o_ndn = dn;
 980         ber_dupbv( &op->o_dn, &dn );
 981
 982
 983         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 984             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 985
 986         return LDAP_SUCCESS;
 987 }
 988
 989 static int parseNoOp (
 990         Operation *op,
 991         SlapReply *rs,
 992         LDAPControl *ctrl )
 993 {
 994         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 995                 rs->sr_text = "noop control specified multiple times";
 996                 return LDAP_PROTOCOL_ERROR;
 997         }
 998
 999         if ( ctrl->ldctl_value.bv_len ) {
1000                 rs->sr_text = "noop control value not empty";
1001                 return LDAP_PROTOCOL_ERROR;
1002         }
1003
1004         op->o_noop = ctrl->ldctl_iscritical
1005                 ? SLAP_CONTROL_CRITICAL
1006                 : SLAP_CONTROL_NONCRITICAL;
1007
1008         return LDAP_SUCCESS;
1009 }
1010
1011 static int parsePagedResults (
1012         Operation *op,
1013         SlapReply *rs,
1014         LDAPControl *ctrl )
1015 {
1016         int             rc = LDAP_SUCCESS;
1017         ber_tag_t       tag;
1018         ber_int_t       size;
1019         BerElement      *ber;
1020         struct berval   cookie = BER_BVNULL;
1021         PagedResultsState       *ps;
1022
1023         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1024                 rs->sr_text = "paged results control specified multiple times";
1025                 return LDAP_PROTOCOL_ERROR;
1026         }
1027
1028         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1029                 rs->sr_text = "paged results control value is empty (or absent)";
1030                 return LDAP_PROTOCOL_ERROR;
1031         }
1032
1033         /* Parse the control value
1034          *      realSearchControlValue ::= SEQUENCE {
1035          *              size    INTEGER (0..maxInt),
1036          *                              -- requested page size from client
1037          *                              -- result set size estimate from server
1038          *              cookie  OCTET STRING
1039          * }
1040          */
1041         ber = ber_init( &ctrl->ldctl_value );
1042         if ( ber == NULL ) {
1043                 rs->sr_text = "internal error";
1044                 return LDAP_OTHER;
1045         }
1046
1047         tag = ber_scanf( ber, "{im}", &size, &cookie );
1048
1049         if ( tag == LBER_ERROR ) {
1050                 rs->sr_text = "paged results control could not be decoded";
1051                 rc = LDAP_PROTOCOL_ERROR;
1052                 goto done;
1053         }
1054
1055         if ( size < 0 ) {
1056                 rs->sr_text = "paged results control size invalid";
1057                 rc = LDAP_PROTOCOL_ERROR;
1058                 goto done;
1059         }
1060
1061         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1062         *ps = op->o_conn->c_pagedresults_state;
1063         ps->ps_size = size;
1064         op->o_pagedresults_state = ps;
1065
1066         /* NOTE: according to RFC 2696 3.:
1067
1068     If the page size is greater than or equal to the sizeLimit value, the
1069     server should ignore the control as the request can be satisfied in a
1070     single page.
1071
1072          * NOTE: this assumes that the op->ors_slimit be set
1073          * before the controls are parsed.
1074          */
1075
1076         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1077                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1078
1079         } else if ( ctrl->ldctl_iscritical ) {
1080                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1081
1082         } else {
1083                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1084         }
1085
1086 done:;
1087         (void)ber_free( ber, 1 );
1088         return rc;
1089 }
1090
1091 #ifdef LDAP_DEVEL
1092 static int parseSortedResults (
1093         Operation *op,
1094         SlapReply *rs,
1095         LDAPControl *ctrl )
1096 {
1097         int             rc = LDAP_SUCCESS;
1098
1099         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1100                 rs->sr_text = "sorted results control specified multiple times";
1101                 return LDAP_PROTOCOL_ERROR;
1102         }
1103
1104         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1105                 rs->sr_text = "sorted results control value is empty (or absent)";
1106                 return LDAP_PROTOCOL_ERROR;
1107         }
1108
1109         /* blow off parsing the value */
1110
1111         op->o_sortedresults = ctrl->ldctl_iscritical
1112                 ? SLAP_CONTROL_CRITICAL
1113                 : SLAP_CONTROL_NONCRITICAL;
1114
1115         return rc;
1116 }
1117 #endif
1118
1119 static int parseAssert (
1120         Operation *op,
1121         SlapReply *rs,
1122         LDAPControl *ctrl )
1123 {
1124         BerElement      *ber;
1125         struct berval   fstr = BER_BVNULL;
1126
1127         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1128                 rs->sr_text = "assert control specified multiple times";
1129                 return LDAP_PROTOCOL_ERROR;
1130         }
1131
1132         if ( ctrl->ldctl_value.bv_len == 0 ) {
1133                 rs->sr_text = "assert control value is empty (or absent)";
1134                 return LDAP_PROTOCOL_ERROR;
1135         }
1136
1137         ber = ber_init( &(ctrl->ldctl_value) );
1138         if (ber == NULL) {
1139                 rs->sr_text = "assert control: internal error";
1140                 return LDAP_OTHER;
1141         }
1142
1143         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1144                 &rs->sr_text);
1145         if( rs->sr_err != LDAP_SUCCESS ) {
1146                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1147                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1148                         send_ldap_disconnect( op, rs );
1149                         rs->sr_err = SLAPD_DISCONNECT;
1150                 } else {
1151                         send_ldap_result( op, rs );
1152                 }
1153                 if( op->o_assertion != NULL ) {
1154                         filter_free_x( op, op->o_assertion );
1155                 }
1156                 return rs->sr_err;
1157         }
1158
1159 #ifdef LDAP_DEBUG
1160         filter2bv_x( op, op->o_assertion, &fstr );
1161
1162         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1163                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1164         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1165 #endif
1166
1167         op->o_assert = ctrl->ldctl_iscritical
1168                 ? SLAP_CONTROL_CRITICAL
1169                 : SLAP_CONTROL_NONCRITICAL;
1170
1171         rs->sr_err = LDAP_SUCCESS;
1172         return LDAP_SUCCESS;
1173 }
1174
1175 static int parsePreRead (
1176         Operation *op,
1177         SlapReply *rs,
1178         LDAPControl *ctrl )
1179 {
1180         ber_len_t siz, off, i;
1181         AttributeName *an = NULL;
1182         BerElement      *ber;
1183
1184         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1185                 rs->sr_text = "preread control specified multiple times";
1186                 return LDAP_PROTOCOL_ERROR;
1187         }
1188
1189         if ( ctrl->ldctl_value.bv_len == 0 ) {
1190                 rs->sr_text = "preread control value is empty (or absent)";
1191                 return LDAP_PROTOCOL_ERROR;
1192         }
1193
1194         ber = ber_init( &(ctrl->ldctl_value) );
1195         if (ber == NULL) {
1196                 rs->sr_text = "preread control: internal error";
1197                 return LDAP_OTHER;
1198         }
1199
1200         siz = sizeof( AttributeName );
1201         off = offsetof( AttributeName, an_name );
1202         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1203                 rs->sr_text = "preread control: decoding error";
1204                 return LDAP_PROTOCOL_ERROR;
1205         }
1206
1207         for( i=0; i<siz; i++ ) {
1208                 int             rc = LDAP_SUCCESS;
1209                 const char      *dummy = NULL;
1210
1211                 an[i].an_desc = NULL;
1212                 an[i].an_oc = NULL;
1213                 an[i].an_oc_exclude = 0;
1214                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1215                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1216                         rs->sr_text = dummy
1217                                 ? dummy
1218                                 : "postread control: unknown attributeType";
1219                         return rc;
1220                 }
1221         }
1222
1223         op->o_preread = ctrl->ldctl_iscritical
1224                 ? SLAP_CONTROL_CRITICAL
1225                 : SLAP_CONTROL_NONCRITICAL;
1226
1227         op->o_preread_attrs = an;
1228
1229         rs->sr_err = LDAP_SUCCESS;
1230         return LDAP_SUCCESS;
1231 }
1232
1233 static int parsePostRead (
1234         Operation *op,
1235         SlapReply *rs,
1236         LDAPControl *ctrl )
1237 {
1238         ber_len_t siz, off, i;
1239         AttributeName *an = NULL;
1240         BerElement      *ber;
1241
1242         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1243                 rs->sr_text = "postread control specified multiple times";
1244                 return LDAP_PROTOCOL_ERROR;
1245         }
1246
1247         if ( ctrl->ldctl_value.bv_len == 0 ) {
1248                 rs->sr_text = "postread control value is empty (or absent)";
1249                 return LDAP_PROTOCOL_ERROR;
1250         }
1251
1252         ber = ber_init( &(ctrl->ldctl_value) );
1253         if (ber == NULL) {
1254                 rs->sr_text = "postread control: internal error";
1255                 return LDAP_OTHER;
1256         }
1257
1258         siz = sizeof( AttributeName );
1259         off = offsetof( AttributeName, an_name );
1260         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1261                 rs->sr_text = "postread control: decoding error";
1262                 return LDAP_PROTOCOL_ERROR;
1263         }
1264
1265         for( i=0; i<siz; i++ ) {
1266                 int             rc = LDAP_SUCCESS;
1267                 const char      *dummy = NULL;
1268
1269                 an[i].an_desc = NULL;
1270                 an[i].an_oc = NULL;
1271                 an[i].an_oc_exclude = 0;
1272                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1273                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1274                         rs->sr_text = dummy
1275                                 ? dummy
1276                                 : "postread control: unknown attributeType";
1277                         return rc;
1278                 }
1279         }
1280
1281         op->o_postread = ctrl->ldctl_iscritical
1282                 ? SLAP_CONTROL_CRITICAL
1283                 : SLAP_CONTROL_NONCRITICAL;
1284
1285         op->o_postread_attrs = an;
1286
1287         rs->sr_err = LDAP_SUCCESS;
1288         return LDAP_SUCCESS;
1289 }
1290
1291 static int parseValuesReturnFilter (
1292         Operation *op,
1293         SlapReply *rs,
1294         LDAPControl *ctrl )
1295 {
1296         BerElement      *ber;
1297         struct berval   fstr = BER_BVNULL;
1298
1299         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1300                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1301                 return LDAP_PROTOCOL_ERROR;
1302         }
1303
1304         if ( ctrl->ldctl_value.bv_len == 0 ) {
1305                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1306                 return LDAP_PROTOCOL_ERROR;
1307         }
1308
1309         ber = ber_init( &(ctrl->ldctl_value) );
1310         if (ber == NULL) {
1311                 rs->sr_text = "internal error";
1312                 return LDAP_OTHER;
1313         }
1314
1315         rs->sr_err = get_vrFilter( op, ber,
1316                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1317
1318         if( rs->sr_err != LDAP_SUCCESS ) {
1319                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1320                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1321                         send_ldap_disconnect( op, rs );
1322                         rs->sr_err = SLAPD_DISCONNECT;
1323                 } else {
1324                         send_ldap_result( op, rs );
1325                 }
1326                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1327         }
1328 #ifdef LDAP_DEBUG
1329         else {
1330                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1331         }
1332
1333         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1334                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1335         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1336 #endif
1337
1338         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1339                 ? SLAP_CONTROL_CRITICAL
1340                 : SLAP_CONTROL_NONCRITICAL;
1341
1342         rs->sr_err = LDAP_SUCCESS;
1343         return LDAP_SUCCESS;
1344 }
1345
1346 static int parseSubentries (
1347         Operation *op,
1348         SlapReply *rs,
1349         LDAPControl *ctrl )
1350 {
1351         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1352                 rs->sr_text = "subentries control specified multiple times";
1353                 return LDAP_PROTOCOL_ERROR;
1354         }
1355
1356         /* FIXME: should use BER library */
1357         if( ( ctrl->ldctl_value.bv_len != 3 )
1358                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1359                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1360         {
1361                 rs->sr_text = "subentries control value encoding is bogus";
1362                 return LDAP_PROTOCOL_ERROR;
1363         }
1364
1365         op->o_subentries = ctrl->ldctl_iscritical
1366                 ? SLAP_CONTROL_CRITICAL
1367                 : SLAP_CONTROL_NONCRITICAL;
1368
1369         if (ctrl->ldctl_value.bv_val[2]) {
1370                 set_subentries_visibility( op );
1371         }
1372
1373         return LDAP_SUCCESS;
1374 }
1375
1376 static int parsePermissiveModify (
1377         Operation *op,
1378         SlapReply *rs,
1379         LDAPControl *ctrl )
1380 {
1381         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1382                 rs->sr_text = "permissiveModify control specified multiple times";
1383                 return LDAP_PROTOCOL_ERROR;
1384         }
1385
1386         if ( ctrl->ldctl_value.bv_len ) {
1387                 rs->sr_text = "permissiveModify control value not empty";
1388                 return LDAP_PROTOCOL_ERROR;
1389         }
1390
1391         op->o_permissive_modify = ctrl->ldctl_iscritical
1392                 ? SLAP_CONTROL_CRITICAL
1393                 : SLAP_CONTROL_NONCRITICAL;
1394
1395         return LDAP_SUCCESS;
1396 }
1397
1398 static int parseDomainScope (
1399         Operation *op,
1400         SlapReply *rs,
1401         LDAPControl *ctrl )
1402 {
1403         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1404                 rs->sr_text = "domainScope control specified multiple times";
1405                 return LDAP_PROTOCOL_ERROR;
1406         }
1407
1408         if ( ctrl->ldctl_value.bv_len ) {
1409                 rs->sr_text = "domainScope control value not empty";
1410                 return LDAP_PROTOCOL_ERROR;
1411         }
1412
1413         op->o_domain_scope = ctrl->ldctl_iscritical
1414                 ? SLAP_CONTROL_CRITICAL
1415                 : SLAP_CONTROL_NONCRITICAL;
1416
1417         return LDAP_SUCCESS;
1418 }
1419
1420 #ifdef SLAP_CONTROL_X_TREE_DELETE
1421 static int parseTreeDelete (
1422         Operation *op,
1423         SlapReply *rs,
1424         LDAPControl *ctrl )
1425 {
1426         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1427                 rs->sr_text = "treeDelete control specified multiple times";
1428                 return LDAP_PROTOCOL_ERROR;
1429         }
1430
1431         if ( ctrl->ldctl_value.bv_len ) {
1432                 rs->sr_text = "treeDelete control value not empty";
1433                 return LDAP_PROTOCOL_ERROR;
1434         }
1435
1436         op->o_tree_delete = ctrl->ldctl_iscritical
1437                 ? SLAP_CONTROL_CRITICAL
1438                 : SLAP_CONTROL_NONCRITICAL;
1439
1440         return LDAP_SUCCESS;
1441 }
1442 #endif
1443
1444 static int parseSearchOptions (
1445         Operation *op,
1446         SlapReply *rs,
1447         LDAPControl *ctrl )
1448 {
1449         BerElement *ber;
1450         ber_int_t search_flags;
1451         ber_tag_t tag;
1452
1453         if ( ctrl->ldctl_value.bv_len == 0 ) {
1454                 rs->sr_text = "searchOptions control value is empty (or absent)";
1455                 return LDAP_PROTOCOL_ERROR;
1456         }
1457
1458         ber = ber_init( &ctrl->ldctl_value );
1459         if( ber == NULL ) {
1460                 rs->sr_text = "internal error";
1461                 return LDAP_OTHER;
1462         }
1463
1464         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1465                 rs->sr_text = "searchOptions control decoding error";
1466                 return LDAP_PROTOCOL_ERROR;
1467         }
1468
1469         (void) ber_free( ber, 1 );
1470
1471         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1472                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1473                         rs->sr_text = "searchOptions control specified multiple times "
1474                                 "or with domainScope control";
1475                         return LDAP_PROTOCOL_ERROR;
1476                 }
1477
1478                 op->o_domain_scope = ctrl->ldctl_iscritical
1479                         ? SLAP_CONTROL_CRITICAL
1480                         : SLAP_CONTROL_NONCRITICAL;
1481         }
1482
1483         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1484                 /* Other search flags not recognised so far,
1485                  * including:
1486                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1487                  */
1488                 rs->sr_text = "searchOptions contained unrecognized flag";
1489                 return LDAP_UNWILLING_TO_PERFORM;
1490         }
1491
1492         return LDAP_SUCCESS;
1493 }
1494