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, NULL, 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_extendedopsbv );
 290                         sc->sc_extendedopsbv = NULL;
 291                         sc->sc_extendedops = NULL;
 292                 }
 293         }
 294
 295         sc->sc_extendedopsbv = extendedopsbv;
 296         sc->sc_mask = controlmask;
 297         sc->sc_parse = controlparsefn;
 298         if ( controlcid ) {
 299                 *controlcid = sc->sc_cid;
 300         }
 301
 302         return LDAP_SUCCESS;
 303 }
 304
 305 /*
 306  * One-time initialization of internal controls.
 307  */
 308 int
 309 slap_controls_init( void )
 310 {
 311         int i, rc;
 312
 313         rc = LDAP_SUCCESS;
 314
 315         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 316                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 317                 rc = register_supported_control( control_defs[i].sc_oid,
 318                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 319                         control_defs[i].sc_parse, cid );
 320                 if ( rc != LDAP_SUCCESS ) break;
 321         }
 322
 323         return rc;
 324 }
 325
 326 /*
 327  * Free memory associated with list of supported controls.
 328  */
 329 void
 330 controls_destroy( void )
 331 {
 332         struct slap_control *sc;
 333
 334         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 335                 sc = LDAP_SLIST_FIRST(&controls_list);
 336                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 337
 338                 ch_free( sc->sc_oid );
 339                 if ( sc->sc_extendedopsbv != NULL ) {
 340                         ber_bvarray_free( sc->sc_extendedopsbv );
 341                 }
 342                 ch_free( sc );
 343         }
 344 }
 345
 346 /*
 347  * Format the supportedControl attribute of the root DSE,
 348  * detailing which controls are supported by the directory
 349  * server.
 350  */
 351 int
 352 controls_root_dse_info( Entry *e )
 353 {
 354         AttributeDescription *ad_supportedControl
 355                 = slap_schema.si_ad_supportedControl;
 356         struct berval vals[2];
 357         struct slap_control *sc;
 358
 359         vals[1].bv_val = NULL;
 360         vals[1].bv_len = 0;
 361
 362         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 363                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 364
 365                 vals[0].bv_val = sc->sc_oid;
 366                 vals[0].bv_len = strlen( sc->sc_oid );
 367
 368                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 369                         return -1;
 370                 }
 371         }
 372
 373         return 0;
 374 }
 375
 376 /*
 377  * Return a list of OIDs and operation masks for supported
 378  * controls. Used by SLAPI.
 379  */
 380 int
 381 get_supported_controls(char ***ctrloidsp,
 382         slap_mask_t **ctrlmasks)
 383 {
 384         int n;
 385         char **oids;
 386         slap_mask_t *masks;
 387         struct slap_control *sc;
 388
 389         n = 0;
 390
 391         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 392                 n++;
 393         }
 394
 395         if ( n == 0 ) {
 396                 *ctrloidsp = NULL;
 397                 *ctrlmasks = NULL;
 398                 return LDAP_SUCCESS;
 399         }
 400
 401         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 402         if ( oids == NULL ) {
 403                 return LDAP_NO_MEMORY;
 404         }
 405         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 406         if  ( masks == NULL ) {
 407                 ch_free( oids );
 408                 return LDAP_NO_MEMORY;
 409         }
 410
 411         n = 0;
 412
 413         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 414                 oids[n] = ch_strdup( sc->sc_oid );
 415                 masks[n] = sc->sc_mask;
 416                 n++;
 417         }
 418         oids[n] = NULL;
 419         masks[n] = 0;
 420
 421         *ctrloidsp = oids;
 422         *ctrlmasks = masks;
 423
 424         return LDAP_SUCCESS;
 425 }
 426
 427 /*
 428  * Find a control given its OID.
 429  */
 430 static struct slap_control *
 431 find_ctrl( const char *oid )
 432 {
 433         struct slap_control *sc;
 434
 435         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 436                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 437                         return sc;
 438                 }
 439         }
 440
 441         return NULL;
 442 }
 443
 444 int
 445 slap_find_control_id(
 446         const char *oid,
 447         int *cid )
 448 {
 449         struct slap_control *ctrl = find_ctrl( oid );
 450         if ( ctrl ) {
 451                 if ( cid ) *cid = ctrl->sc_cid;
 452                 return LDAP_SUCCESS;
 453         }
 454         return LDAP_CONTROL_NOT_FOUND;
 455 }
 456
 457 int
 458 slap_global_control( Operation *op, const char *oid, int *cid )
 459 {
 460         struct slap_control *ctrl = find_ctrl( oid );
 461
 462         if ( ctrl == NULL ) {
 463                 /* should not be reachable */
 464                 Debug( LDAP_DEBUG_ANY,
 465                         "slap_global_control: unrecognized control: %s\n",
 466                         oid, 0, 0 );
 467                 return LDAP_CONTROL_NOT_FOUND;
 468         }
 469
 470         if ( cid ) *cid = ctrl->sc_cid;
 471
 472         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 473                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 474                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 475         {
 476                 return LDAP_COMPARE_TRUE;
 477         }
 478
 479         Debug( LDAP_DEBUG_TRACE,
 480                 "slap_global_control: unavailable control: %s\n",
 481                 oid, 0, 0 );
 482
 483         return LDAP_COMPARE_FALSE;
 484 }
 485
 486 void slap_free_ctrls(
 487         Operation *op,
 488         LDAPControl **ctrls )
 489 {
 490         int i;
 491
 492         for (i=0; ctrls[i]; i++) {
 493                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 494         }
 495         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 496 }
 497
 498 int slap_parse_ctrl(
 499         Operation *op,
 500         SlapReply *rs,
 501         LDAPControl *control,
 502         const char **text )
 503 {
 504         struct slap_control *sc;
 505
 506         sc = find_ctrl( control->ldctl_oid );
 507         if( sc != NULL ) {
 508                 /* recognized control */
 509                 slap_mask_t tagmask;
 510                 switch( op->o_tag ) {
 511                 case LDAP_REQ_ADD:
 512                         tagmask = SLAP_CTRL_ADD;
 513                         break;
 514                 case LDAP_REQ_BIND:
 515                         tagmask = SLAP_CTRL_BIND;
 516                         break;
 517                 case LDAP_REQ_COMPARE:
 518                         tagmask = SLAP_CTRL_COMPARE;
 519                         break;
 520                 case LDAP_REQ_DELETE:
 521                         tagmask = SLAP_CTRL_DELETE;
 522                         break;
 523                 case LDAP_REQ_MODIFY:
 524                         tagmask = SLAP_CTRL_MODIFY;
 525                         break;
 526                 case LDAP_REQ_RENAME:
 527                         tagmask = SLAP_CTRL_RENAME;
 528                         break;
 529                 case LDAP_REQ_SEARCH:
 530                         tagmask = SLAP_CTRL_SEARCH;
 531                         break;
 532                 case LDAP_REQ_UNBIND:
 533                         tagmask = SLAP_CTRL_UNBIND;
 534                         break;
 535                 case LDAP_REQ_ABANDON:
 536                         tagmask = SLAP_CTRL_ABANDON;
 537                         break;
 538                 case LDAP_REQ_EXTENDED:
 539                         tagmask=~0L;
 540                         assert( op->ore_reqoid.bv_val != NULL );
 541                         if( sc->sc_extendedopsbv != NULL ) {
 542                                 int i;
 543                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 544                                         if( bvmatch( &op->ore_reqoid,
 545                                                 &sc->sc_extendedopsbv[i] ) )
 546                                         {
 547                                                 tagmask=0L;
 548                                                 break;
 549                                         }
 550                                 }
 551                         }
 552                         break;
 553                 default:
 554                         *text = "controls internal error";
 555                         return LDAP_OTHER;
 556                 }
 557
 558                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 559                         /* available extension */
 560                         int     rc;
 561
 562                         if( !sc->sc_parse ) {
 563                                 *text = "not yet implemented";
 564                                 return LDAP_OTHER;
 565                         }
 566
 567                         rc = sc->sc_parse( op, rs, control );
 568                         if ( rc ) {
 569                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 570                                 return rc;
 571                         }
 572
 573                 } else if( control->ldctl_iscritical ) {
 574                         /* unavailable CRITICAL control */
 575                         *text = "critical extension is unavailable";
 576                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 577                 }
 578         } else if( control->ldctl_iscritical ) {
 579                 /* unrecognized CRITICAL control */
 580                 *text = "critical extension is not recognized";
 581                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 582         }
 583
 584         return LDAP_SUCCESS;
 585 }
 586
 587 int get_ctrls(
 588         Operation *op,
 589         SlapReply *rs,
 590         int sendres )
 591 {
 592         int nctrls = 0;
 593         ber_tag_t tag;
 594         ber_len_t len;
 595         char *opaque;
 596         BerElement *ber = op->o_ber;
 597         struct berval bv;
 598
 599         len = ber_pvt_ber_remaining(ber);
 600
 601         if( len == 0) {
 602                 /* no controls */
 603                 rs->sr_err = LDAP_SUCCESS;
 604                 return rs->sr_err;
 605         }
 606
 607         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 608                 if( tag == LBER_ERROR ) {
 609                         rs->sr_err = SLAPD_DISCONNECT;
 610                         rs->sr_text = "unexpected data in PDU";
 611                 }
 612
 613                 goto return_results;
 614         }
 615
 616         Debug( LDAP_DEBUG_TRACE,
 617                 "=> get_ctrls\n", 0, 0, 0 );
 618
 619         if( op->o_protocol < LDAP_VERSION3 ) {
 620                 rs->sr_err = SLAPD_DISCONNECT;
 621                 rs->sr_text = "controls require LDAPv3";
 622                 goto return_results;
 623         }
 624
 625         /* one for first control, one for termination */
 626         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 627
 628 #if 0
 629         if( op->ctrls == NULL ) {
 630                 rs->sr_err = LDAP_NO_MEMORY;
 631                 rs->sr_text = "no memory";
 632                 goto return_results;
 633         }
 634 #endif
 635
 636         op->o_ctrls[nctrls] = NULL;
 637
 638         /* step through each element */
 639         for( tag = ber_first_element( ber, &len, &opaque );
 640                 tag != LBER_ERROR;
 641                 tag = ber_next_element( ber, &len, opaque ) )
 642         {
 643                 LDAPControl *c;
 644                 LDAPControl **tctrls;
 645
 646                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 647                 memset(c, 0, sizeof(LDAPControl));
 648
 649                 /* allocate pointer space for current controls (nctrls)
 650                  * + this control + extra NULL
 651                  */
 652                 tctrls = op->o_tmprealloc( op->o_ctrls,
 653                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 654
 655 #if 0
 656                 if( tctrls == NULL ) {
 657                         ch_free( c );
 658                         ldap_controls_free(op->o_ctrls);
 659                         op->o_ctrls = NULL;
 660
 661                         rs->sr_err = LDAP_NO_MEMORY;
 662                         rs->sr_text = "no memory";
 663                         goto return_results;
 664                 }
 665 #endif
 666                 op->o_ctrls = tctrls;
 667
 668                 op->o_ctrls[nctrls++] = c;
 669                 op->o_ctrls[nctrls] = NULL;
 670
 671                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 672                 c->ldctl_oid = bv.bv_val;
 673
 674                 if( tag == LBER_ERROR ) {
 675                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 676                                 0, 0, 0 );
 677
 678                         slap_free_ctrls( op, op->o_ctrls );
 679                         op->o_ctrls = NULL;
 680                         rs->sr_err = SLAPD_DISCONNECT;
 681                         rs->sr_text = "decoding controls error";
 682                         goto return_results;
 683
 684                 } else if( c->ldctl_oid == NULL ) {
 685                         Debug( LDAP_DEBUG_TRACE,
 686                                 "get_ctrls: conn %lu got emtpy OID.\n",
 687                                 op->o_connid, 0, 0 );
 688
 689                         slap_free_ctrls( op, op->o_ctrls );
 690                         op->o_ctrls = NULL;
 691                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 692                         rs->sr_text = "OID field is empty";
 693                         goto return_results;
 694                 }
 695
 696                 tag = ber_peek_tag( ber, &len );
 697
 698                 if( tag == LBER_BOOLEAN ) {
 699                         ber_int_t crit;
 700                         tag = ber_scanf( ber, "b", &crit );
 701
 702                         if( tag == LBER_ERROR ) {
 703                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 704                                         0, 0, 0 );
 705                                 slap_free_ctrls( op, op->o_ctrls );
 706                                 op->o_ctrls = NULL;
 707                                 rs->sr_err = SLAPD_DISCONNECT;
 708                                 rs->sr_text = "decoding controls error";
 709                                 goto return_results;
 710                         }
 711
 712                         c->ldctl_iscritical = (crit != 0);
 713                         tag = ber_peek_tag( ber, &len );
 714                 }
 715
 716                 if( tag == LBER_OCTETSTRING ) {
 717                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 718
 719                         if( tag == LBER_ERROR ) {
 720                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 721                                         "%s (%scritical): get value failed.\n",
 722                                         op->o_connid, c->ldctl_oid,
 723                                         c->ldctl_iscritical ? "" : "non" );
 724                                 slap_free_ctrls( op, op->o_ctrls );
 725                                 op->o_ctrls = NULL;
 726                                 rs->sr_err = SLAPD_DISCONNECT;
 727                                 rs->sr_text = "decoding controls error";
 728                                 goto return_results;
 729                         }
 730                 }
 731
 732                 Debug( LDAP_DEBUG_TRACE,
 733                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 734                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 735
 736                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 737                 if ( rs->sr_err != LDAP_SUCCESS ) {
 738                         goto return_results;
 739                 }
 740         }
 741
 742 return_results:
 743         Debug( LDAP_DEBUG_TRACE,
 744                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 745                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 746
 747         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 748                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 749                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 750                         send_ldap_disconnect( op, rs );
 751                         rs->sr_err = SLAPD_DISCONNECT;
 752                 } else {
 753                         send_ldap_result( op, rs );
 754                 }
 755         }
 756
 757         return rs->sr_err;
 758 }
 759
 760 int
 761 slap_remove_control(
 762         Operation       *op,
 763         SlapReply       *rs,
 764         int             ctrl,
 765         BI_chk_controls fnc )
 766 {
 767         int             i, j;
 768
 769         switch ( op->o_ctrlflag[ ctrl ] ) {
 770         case SLAP_CONTROL_NONCRITICAL:
 771                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 772                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 773                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 774                         {
 775                                 j = i;
 776                         }
 777                 }
 778
 779                 if ( j == -1 ) {
 780                         rs->sr_err = LDAP_OTHER;
 781                         break;
 782                 }
 783
 784                 if ( fnc ) {
 785                         (void)fnc( op, rs );
 786                 }
 787
 788                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 789
 790                 if ( i > 1 ) {
 791                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 792                                 ( i - j ) * sizeof( LDAPControl * ) );
 793
 794                 } else {
 795                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 796                         op->o_ctrls = NULL;
 797                 }
 798
 799                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 800
 801                 Debug( LDAP_DEBUG_ANY, "%s: "
 802                         "non-critical control \"%s\" not supported; stripped.\n",
 803                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 804                 /* fall thru */
 805
 806         case SLAP_CONTROL_IGNORED:
 807         case SLAP_CONTROL_NONE:
 808                 rs->sr_err = SLAP_CB_CONTINUE;
 809                 break;
 810
 811         case SLAP_CONTROL_CRITICAL:
 812                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 813                 if ( fnc ) {
 814                         (void)fnc( op, rs );
 815                 }
 816                 Debug( LDAP_DEBUG_ANY, "%s: "
 817                         "critical control \"%s\" not supported.\n",
 818                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 819                 break;
 820
 821         default:
 822                 /* handle all cases! */
 823                 assert( 0 );
 824         }
 825
 826         return rs->sr_err;
 827 }
 828
 829 #ifdef LDAP_DEVEL
 830 static int parseDontUseCopy (
 831         Operation *op,
 832         SlapReply *rs,
 833         LDAPControl *ctrl )
 834 {
 835         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 836                 rs->sr_text = "dontUseCopy control specified multiple times";
 837                 return LDAP_PROTOCOL_ERROR;
 838         }
 839
 840         if ( ctrl->ldctl_value.bv_len ) {
 841                 rs->sr_text = "dontUseCopy control value not empty";
 842                 return LDAP_PROTOCOL_ERROR;
 843         }
 844
 845         if ( ctrl->ldctl_iscritical != SLAP_CONTROL_CRITICAL ) {
 846                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 847                 return LDAP_PROTOCOL_ERROR;
 848         }
 849
 850         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 851         return LDAP_SUCCESS;
 852 }
 853
 854 static int parseManageDIT (
 855         Operation *op,
 856         SlapReply *rs,
 857         LDAPControl *ctrl )
 858 {
 859         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 860                 rs->sr_text = "manageDIT control specified multiple times";
 861                 return LDAP_PROTOCOL_ERROR;
 862         }
 863
 864         if ( ctrl->ldctl_value.bv_len ) {
 865                 rs->sr_text = "manageDIT control value not empty";
 866                 return LDAP_PROTOCOL_ERROR;
 867         }
 868
 869         op->o_managedit = ctrl->ldctl_iscritical
 870                 ? SLAP_CONTROL_CRITICAL
 871                 : SLAP_CONTROL_NONCRITICAL;
 872
 873         return LDAP_SUCCESS;
 874 }
 875 #endif
 876
 877 static int parseManageDSAit (
 878         Operation *op,
 879         SlapReply *rs,
 880         LDAPControl *ctrl )
 881 {
 882         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 883                 rs->sr_text = "manageDSAit control specified multiple times";
 884                 return LDAP_PROTOCOL_ERROR;
 885         }
 886
 887         if ( ctrl->ldctl_value.bv_len ) {
 888                 rs->sr_text = "manageDSAit control value not empty";
 889                 return LDAP_PROTOCOL_ERROR;
 890         }
 891
 892         op->o_managedsait = ctrl->ldctl_iscritical
 893                 ? SLAP_CONTROL_CRITICAL
 894                 : SLAP_CONTROL_NONCRITICAL;
 895
 896         return LDAP_SUCCESS;
 897 }
 898
 899 static int parseProxyAuthz (
 900         Operation *op,
 901         SlapReply *rs,
 902         LDAPControl *ctrl )
 903 {
 904         int             rc;
 905         struct berval   dn = BER_BVNULL;
 906
 907         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 908                 rs->sr_text = "proxy authorization control specified multiple times";
 909                 return LDAP_PROTOCOL_ERROR;
 910         }
 911
 912         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
 913                 && BER_BVISEMPTY( &op->o_ndn ) )
 914         {
 915                 rs->sr_text = "anonymous proxyAuthz not allowed";
 916                 return LDAP_PROXY_AUTHZ_FAILURE;
 917         }
 918
 919         op->o_proxy_authz = ctrl->ldctl_iscritical
 920                 ? SLAP_CONTROL_CRITICAL
 921                 : SLAP_CONTROL_NONCRITICAL;
 922
 923         Debug( LDAP_DEBUG_ARGS,
 924                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 925                 op->o_connid,
 926                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 927                 0 );
 928
 929         if ( ctrl->ldctl_value.bv_len == 0 ) {
 930                 Debug( LDAP_DEBUG_TRACE,
 931                         "parseProxyAuthz: conn=%lu anonymous\n",
 932                         op->o_connid, 0, 0 );
 933
 934                 /* anonymous */
 935                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 936                         op->o_ndn.bv_val[ 0 ] = '\0';
 937                 }
 938                 op->o_ndn.bv_len = 0;
 939
 940                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 941                         op->o_dn.bv_val[ 0 ] = '\0';
 942                 }
 943                 op->o_dn.bv_len = 0;
 944
 945                 return LDAP_SUCCESS;
 946         }
 947
 948         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 949                         NULL, &dn, SLAP_GETDN_AUTHZID );
 950
 951         /* FIXME: empty DN in proxyAuthz control should be legal... */
 952         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 953                 if ( dn.bv_val ) {
 954                         ch_free( dn.bv_val );
 955                 }
 956                 rs->sr_text = "authzId mapping failed";
 957                 return LDAP_PROXY_AUTHZ_FAILURE;
 958         }
 959
 960         Debug( LDAP_DEBUG_TRACE,
 961                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 962                 op->o_connid,
 963                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 964
 965         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 966
 967         if ( rc ) {
 968                 ch_free( dn.bv_val );
 969                 rs->sr_text = "not authorized to assume identity";
 970                 return LDAP_PROXY_AUTHZ_FAILURE;
 971         }
 972
 973         ch_free( op->o_ndn.bv_val );
 974         ch_free( op->o_dn.bv_val );
 975
 976         /*
 977          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 978          * from now on op->o_dn is normalized
 979          */
 980         op->o_ndn = dn;
 981         ber_dupbv( &op->o_dn, &dn );
 982
 983
 984         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 985             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 986
 987         return LDAP_SUCCESS;
 988 }
 989
 990 static int parseNoOp (
 991         Operation *op,
 992         SlapReply *rs,
 993         LDAPControl *ctrl )
 994 {
 995         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 996                 rs->sr_text = "noop control specified multiple times";
 997                 return LDAP_PROTOCOL_ERROR;
 998         }
 999
1000         if ( ctrl->ldctl_value.bv_len ) {
1001                 rs->sr_text = "noop control value not empty";
1002                 return LDAP_PROTOCOL_ERROR;
1003         }
1004
1005         op->o_noop = ctrl->ldctl_iscritical
1006                 ? SLAP_CONTROL_CRITICAL
1007                 : SLAP_CONTROL_NONCRITICAL;
1008
1009         return LDAP_SUCCESS;
1010 }
1011
1012 static int parsePagedResults (
1013         Operation *op,
1014         SlapReply *rs,
1015         LDAPControl *ctrl )
1016 {
1017         int             rc = LDAP_SUCCESS;
1018         ber_tag_t       tag;
1019         ber_int_t       size;
1020         BerElement      *ber;
1021         struct berval   cookie = BER_BVNULL;
1022         PagedResultsState       *ps;
1023
1024         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1025                 rs->sr_text = "paged results control specified multiple times";
1026                 return LDAP_PROTOCOL_ERROR;
1027         }
1028
1029         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1030                 rs->sr_text = "paged results control value is empty (or absent)";
1031                 return LDAP_PROTOCOL_ERROR;
1032         }
1033
1034         /* Parse the control value
1035          *      realSearchControlValue ::= SEQUENCE {
1036          *              size    INTEGER (0..maxInt),
1037          *                              -- requested page size from client
1038          *                              -- result set size estimate from server
1039          *              cookie  OCTET STRING
1040          * }
1041          */
1042         ber = ber_init( &ctrl->ldctl_value );
1043         if ( ber == NULL ) {
1044                 rs->sr_text = "internal error";
1045                 return LDAP_OTHER;
1046         }
1047
1048         tag = ber_scanf( ber, "{im}", &size, &cookie );
1049
1050         if ( tag == LBER_ERROR ) {
1051                 rs->sr_text = "paged results control could not be decoded";
1052                 rc = LDAP_PROTOCOL_ERROR;
1053                 goto done;
1054         }
1055
1056         if ( size < 0 ) {
1057                 rs->sr_text = "paged results control size invalid";
1058                 rc = LDAP_PROTOCOL_ERROR;
1059                 goto done;
1060         }
1061
1062         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1063         *ps = op->o_conn->c_pagedresults_state;
1064         ps->ps_size = size;
1065         op->o_pagedresults_state = ps;
1066
1067         /* NOTE: according to RFC 2696 3.:
1068
1069     If the page size is greater than or equal to the sizeLimit value, the
1070     server should ignore the control as the request can be satisfied in a
1071     single page.
1072
1073          * NOTE: this assumes that the op->ors_slimit be set
1074          * before the controls are parsed.
1075          */
1076
1077         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1078                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1079
1080         } else if ( ctrl->ldctl_iscritical ) {
1081                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1082
1083         } else {
1084                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1085         }
1086
1087 done:;
1088         (void)ber_free( ber, 1 );
1089         return rc;
1090 }
1091
1092 #ifdef LDAP_DEVEL
1093 static int parseSortedResults (
1094         Operation *op,
1095         SlapReply *rs,
1096         LDAPControl *ctrl )
1097 {
1098         int             rc = LDAP_SUCCESS;
1099
1100         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1101                 rs->sr_text = "sorted results control specified multiple times";
1102                 return LDAP_PROTOCOL_ERROR;
1103         }
1104
1105         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1106                 rs->sr_text = "sorted results control value is empty (or absent)";
1107                 return LDAP_PROTOCOL_ERROR;
1108         }
1109
1110         /* blow off parsing the value */
1111
1112         op->o_sortedresults = ctrl->ldctl_iscritical
1113                 ? SLAP_CONTROL_CRITICAL
1114                 : SLAP_CONTROL_NONCRITICAL;
1115
1116         return rc;
1117 }
1118 #endif
1119
1120 static int parseAssert (
1121         Operation *op,
1122         SlapReply *rs,
1123         LDAPControl *ctrl )
1124 {
1125         BerElement      *ber;
1126         struct berval   fstr = BER_BVNULL;
1127
1128         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1129                 rs->sr_text = "assert control specified multiple times";
1130                 return LDAP_PROTOCOL_ERROR;
1131         }
1132
1133         if ( ctrl->ldctl_value.bv_len == 0 ) {
1134                 rs->sr_text = "assert control value is empty (or absent)";
1135                 return LDAP_PROTOCOL_ERROR;
1136         }
1137
1138         ber = ber_init( &(ctrl->ldctl_value) );
1139         if (ber == NULL) {
1140                 rs->sr_text = "assert control: internal error";
1141                 return LDAP_OTHER;
1142         }
1143
1144         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1145                 &rs->sr_text);
1146         if( rs->sr_err != LDAP_SUCCESS ) {
1147                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1148                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1149                         send_ldap_disconnect( op, rs );
1150                         rs->sr_err = SLAPD_DISCONNECT;
1151                 } else {
1152                         send_ldap_result( op, rs );
1153                 }
1154                 if( op->o_assertion != NULL ) {
1155                         filter_free_x( op, op->o_assertion );
1156                 }
1157                 return rs->sr_err;
1158         }
1159
1160 #ifdef LDAP_DEBUG
1161         filter2bv_x( op, op->o_assertion, &fstr );
1162
1163         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1164                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1165         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1166 #endif
1167
1168         op->o_assert = ctrl->ldctl_iscritical
1169                 ? SLAP_CONTROL_CRITICAL
1170                 : SLAP_CONTROL_NONCRITICAL;
1171
1172         rs->sr_err = LDAP_SUCCESS;
1173         return LDAP_SUCCESS;
1174 }
1175
1176 static int parsePreRead (
1177         Operation *op,
1178         SlapReply *rs,
1179         LDAPControl *ctrl )
1180 {
1181         ber_len_t siz, off, i;
1182         AttributeName *an = NULL;
1183         BerElement      *ber;
1184
1185         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1186                 rs->sr_text = "preread control specified multiple times";
1187                 return LDAP_PROTOCOL_ERROR;
1188         }
1189
1190         if ( ctrl->ldctl_value.bv_len == 0 ) {
1191                 rs->sr_text = "preread control value is empty (or absent)";
1192                 return LDAP_PROTOCOL_ERROR;
1193         }
1194
1195         ber = ber_init( &(ctrl->ldctl_value) );
1196         if (ber == NULL) {
1197                 rs->sr_text = "preread control: internal error";
1198                 return LDAP_OTHER;
1199         }
1200
1201         siz = sizeof( AttributeName );
1202         off = offsetof( AttributeName, an_name );
1203         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1204                 rs->sr_text = "preread control: decoding error";
1205                 return LDAP_PROTOCOL_ERROR;
1206         }
1207
1208         for( i=0; i<siz; i++ ) {
1209                 int             rc = LDAP_SUCCESS;
1210                 const char      *dummy = NULL;
1211
1212                 an[i].an_desc = NULL;
1213                 an[i].an_oc = NULL;
1214                 an[i].an_oc_exclude = 0;
1215                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1216                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1217                         rs->sr_text = dummy
1218                                 ? dummy
1219                                 : "postread control: unknown attributeType";
1220                         return rc;
1221                 }
1222         }
1223
1224         op->o_preread = ctrl->ldctl_iscritical
1225                 ? SLAP_CONTROL_CRITICAL
1226                 : SLAP_CONTROL_NONCRITICAL;
1227
1228         op->o_preread_attrs = an;
1229
1230         rs->sr_err = LDAP_SUCCESS;
1231         return LDAP_SUCCESS;
1232 }
1233
1234 static int parsePostRead (
1235         Operation *op,
1236         SlapReply *rs,
1237         LDAPControl *ctrl )
1238 {
1239         ber_len_t siz, off, i;
1240         AttributeName *an = NULL;
1241         BerElement      *ber;
1242
1243         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1244                 rs->sr_text = "postread control specified multiple times";
1245                 return LDAP_PROTOCOL_ERROR;
1246         }
1247
1248         if ( ctrl->ldctl_value.bv_len == 0 ) {
1249                 rs->sr_text = "postread control value is empty (or absent)";
1250                 return LDAP_PROTOCOL_ERROR;
1251         }
1252
1253         ber = ber_init( &(ctrl->ldctl_value) );
1254         if (ber == NULL) {
1255                 rs->sr_text = "postread control: internal error";
1256                 return LDAP_OTHER;
1257         }
1258
1259         siz = sizeof( AttributeName );
1260         off = offsetof( AttributeName, an_name );
1261         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1262                 rs->sr_text = "postread control: decoding error";
1263                 return LDAP_PROTOCOL_ERROR;
1264         }
1265
1266         for( i=0; i<siz; i++ ) {
1267                 int             rc = LDAP_SUCCESS;
1268                 const char      *dummy = NULL;
1269
1270                 an[i].an_desc = NULL;
1271                 an[i].an_oc = NULL;
1272                 an[i].an_oc_exclude = 0;
1273                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1274                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1275                         rs->sr_text = dummy
1276                                 ? dummy
1277                                 : "postread control: unknown attributeType";
1278                         return rc;
1279                 }
1280         }
1281
1282         op->o_postread = ctrl->ldctl_iscritical
1283                 ? SLAP_CONTROL_CRITICAL
1284                 : SLAP_CONTROL_NONCRITICAL;
1285
1286         op->o_postread_attrs = an;
1287
1288         rs->sr_err = LDAP_SUCCESS;
1289         return LDAP_SUCCESS;
1290 }
1291
1292 static int parseValuesReturnFilter (
1293         Operation *op,
1294         SlapReply *rs,
1295         LDAPControl *ctrl )
1296 {
1297         BerElement      *ber;
1298         struct berval   fstr = BER_BVNULL;
1299
1300         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1301                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1302                 return LDAP_PROTOCOL_ERROR;
1303         }
1304
1305         if ( ctrl->ldctl_value.bv_len == 0 ) {
1306                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1307                 return LDAP_PROTOCOL_ERROR;
1308         }
1309
1310         ber = ber_init( &(ctrl->ldctl_value) );
1311         if (ber == NULL) {
1312                 rs->sr_text = "internal error";
1313                 return LDAP_OTHER;
1314         }
1315
1316         rs->sr_err = get_vrFilter( op, ber,
1317                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1318
1319         if( rs->sr_err != LDAP_SUCCESS ) {
1320                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1321                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1322                         send_ldap_disconnect( op, rs );
1323                         rs->sr_err = SLAPD_DISCONNECT;
1324                 } else {
1325                         send_ldap_result( op, rs );
1326                 }
1327                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1328         }
1329 #ifdef LDAP_DEBUG
1330         else {
1331                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1332         }
1333
1334         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1335                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1336         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1337 #endif
1338
1339         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1340                 ? SLAP_CONTROL_CRITICAL
1341                 : SLAP_CONTROL_NONCRITICAL;
1342
1343         rs->sr_err = LDAP_SUCCESS;
1344         return LDAP_SUCCESS;
1345 }
1346
1347 static int parseSubentries (
1348         Operation *op,
1349         SlapReply *rs,
1350         LDAPControl *ctrl )
1351 {
1352         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1353                 rs->sr_text = "subentries control specified multiple times";
1354                 return LDAP_PROTOCOL_ERROR;
1355         }
1356
1357         /* FIXME: should use BER library */
1358         if( ( ctrl->ldctl_value.bv_len != 3 )
1359                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1360                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1361         {
1362                 rs->sr_text = "subentries control value encoding is bogus";
1363                 return LDAP_PROTOCOL_ERROR;
1364         }
1365
1366         op->o_subentries = ctrl->ldctl_iscritical
1367                 ? SLAP_CONTROL_CRITICAL
1368                 : SLAP_CONTROL_NONCRITICAL;
1369
1370         if (ctrl->ldctl_value.bv_val[2]) {
1371                 set_subentries_visibility( op );
1372         }
1373
1374         return LDAP_SUCCESS;
1375 }
1376
1377 static int parsePermissiveModify (
1378         Operation *op,
1379         SlapReply *rs,
1380         LDAPControl *ctrl )
1381 {
1382         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1383                 rs->sr_text = "permissiveModify control specified multiple times";
1384                 return LDAP_PROTOCOL_ERROR;
1385         }
1386
1387         if ( ctrl->ldctl_value.bv_len ) {
1388                 rs->sr_text = "permissiveModify control value not empty";
1389                 return LDAP_PROTOCOL_ERROR;
1390         }
1391
1392         op->o_permissive_modify = ctrl->ldctl_iscritical
1393                 ? SLAP_CONTROL_CRITICAL
1394                 : SLAP_CONTROL_NONCRITICAL;
1395
1396         return LDAP_SUCCESS;
1397 }
1398
1399 static int parseDomainScope (
1400         Operation *op,
1401         SlapReply *rs,
1402         LDAPControl *ctrl )
1403 {
1404         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1405                 rs->sr_text = "domainScope control specified multiple times";
1406                 return LDAP_PROTOCOL_ERROR;
1407         }
1408
1409         if ( ctrl->ldctl_value.bv_len ) {
1410                 rs->sr_text = "domainScope control value not empty";
1411                 return LDAP_PROTOCOL_ERROR;
1412         }
1413
1414         op->o_domain_scope = ctrl->ldctl_iscritical
1415                 ? SLAP_CONTROL_CRITICAL
1416                 : SLAP_CONTROL_NONCRITICAL;
1417
1418         return LDAP_SUCCESS;
1419 }
1420
1421 #ifdef SLAP_CONTROL_X_TREE_DELETE
1422 static int parseTreeDelete (
1423         Operation *op,
1424         SlapReply *rs,
1425         LDAPControl *ctrl )
1426 {
1427         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1428                 rs->sr_text = "treeDelete control specified multiple times";
1429                 return LDAP_PROTOCOL_ERROR;
1430         }
1431
1432         if ( ctrl->ldctl_value.bv_len ) {
1433                 rs->sr_text = "treeDelete control value not empty";
1434                 return LDAP_PROTOCOL_ERROR;
1435         }
1436
1437         op->o_tree_delete = ctrl->ldctl_iscritical
1438                 ? SLAP_CONTROL_CRITICAL
1439                 : SLAP_CONTROL_NONCRITICAL;
1440
1441         return LDAP_SUCCESS;
1442 }
1443 #endif
1444
1445 static int parseSearchOptions (
1446         Operation *op,
1447         SlapReply *rs,
1448         LDAPControl *ctrl )
1449 {
1450         BerElement *ber;
1451         ber_int_t search_flags;
1452         ber_tag_t tag;
1453
1454         if ( ctrl->ldctl_value.bv_len == 0 ) {
1455                 rs->sr_text = "searchOptions control value is empty (or absent)";
1456                 return LDAP_PROTOCOL_ERROR;
1457         }
1458
1459         ber = ber_init( &ctrl->ldctl_value );
1460         if( ber == NULL ) {
1461                 rs->sr_text = "internal error";
1462                 return LDAP_OTHER;
1463         }
1464
1465         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1466                 rs->sr_text = "searchOptions control decoding error";
1467                 return LDAP_PROTOCOL_ERROR;
1468         }
1469
1470         (void) ber_free( ber, 1 );
1471
1472         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1473                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1474                         rs->sr_text = "searchOptions control specified multiple times "
1475                                 "or with domainScope control";
1476                         return LDAP_PROTOCOL_ERROR;
1477                 }
1478
1479                 op->o_domain_scope = ctrl->ldctl_iscritical
1480                         ? SLAP_CONTROL_CRITICAL
1481                         : SLAP_CONTROL_NONCRITICAL;
1482         }
1483
1484         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1485                 /* Other search flags not recognised so far,
1486                  * including:
1487                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1488                  */
1489                 rs->sr_text = "searchOptions contained unrecognized flag";
1490                 return LDAP_UNWILLING_TO_PERFORM;
1491         }
1492
1493         return LDAP_SUCCESS;
1494 }
1495