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 1998-2005 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 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  32 static SLAP_CTRL_PARSE_FN parseModifyIncrement;
  33 static SLAP_CTRL_PARSE_FN parseNoOp;
  34 static SLAP_CTRL_PARSE_FN parsePagedResults;
  35 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  36 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  37 static SLAP_CTRL_PARSE_FN parseDomainScope;
  38 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  39 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  40 static SLAP_CTRL_PARSE_FN parseSubentries;
  41
  42 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  43
  44 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  45 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  46
  47 struct slap_control_ids slap_cids;
  48
  49 struct slap_control {
  50         /* Control OID */
  51         char *sc_oid;
  52
  53         /* The controlID for this control */
  54         int sc_cid;
  55
  56         /* Operations supported by control */
  57         slap_mask_t sc_mask;
  58
  59         /* Extended operations supported by control */
  60         char **sc_extendedops;
  61
  62         /* Control parsing callback */
  63         SLAP_CTRL_PARSE_FN *sc_parse;
  64
  65         LDAP_SLIST_ENTRY(slap_control) sc_next;
  66 };
  67
  68 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  69         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  70
  71 /*
  72  * all known request control OIDs should be added to this list
  73  */
  74 /*
  75  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  76  * addresses an undefined control; this allows to safely test for
  77  * well known controls even if they are not registered, e.g. if
  78  * they get moved to modules.  An example is sc_LDAPsync, which
  79  * is implemented in the syncprov overlay and thus, if configured
  80  * as dynamic module, may not be registered.  One side effect is that
  81  * slap_known_controls[0] == NULL, so it should always be used
  82  * starting from 1.
  83  * FIXME: should we define the "undefined control" oid?
  84  */
  85 char *slap_known_controls[SLAP_MAX_CIDS+1];
  86 static int num_known_controls = 1;
  87
  88 static char *proxy_authz_extops[] = {
  89         LDAP_EXOP_MODIFY_PASSWD,
  90         LDAP_EXOP_X_WHO_AM_I,
  91         NULL
  92 };
  93
  94 static struct slap_control control_defs[] = {
  95         {  LDAP_CONTROL_ASSERT,
  96                 (int)offsetof(struct slap_control_ids, sc_assert),
  97                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
  98                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  99         { LDAP_CONTROL_PRE_READ,
 100                 (int)offsetof(struct slap_control_ids, sc_preRead),
 101                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 102                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 103         { LDAP_CONTROL_POST_READ,
 104                 (int)offsetof(struct slap_control_ids, sc_postRead),
 105                 SLAP_CTRL_HIDE|SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 106                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 107         { LDAP_CONTROL_VALUESRETURNFILTER,
 108                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 109                 SLAP_CTRL_SEARCH, NULL,
 110                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 111         { LDAP_CONTROL_PAGEDRESULTS,
 112                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 113                 SLAP_CTRL_SEARCH, NULL,
 114                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 115 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
 116         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 117                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 118                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 119                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 120 #endif
 121 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 122         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 123                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 124                 SLAP_CTRL_MODIFY, NULL,
 125                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 126 #endif
 127 #ifdef SLAP_CONTROL_X_TREE_DELETE
 128         { LDAP_CONTROL_X_TREE_DELETE,
 129                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 130                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE, NULL,
 131                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 132 #endif
 133 #ifdef LDAP_CONTORL_X_SEARCH_OPTIONS
 134         { LDAP_CONTORL_X_SEARCH_OPTIONS,
 135                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 136                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 137                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 138 #endif
 139 #ifdef LDAP_CONTROL_SUBENTRIES
 140         { LDAP_CONTROL_SUBENTRIES,
 141                 (int)offsetof(struct slap_control_ids, sc_subentries),
 142                 SLAP_CTRL_SEARCH, NULL,
 143                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 144 #endif
 145         { LDAP_CONTROL_NOOP,
 146                 (int)offsetof(struct slap_control_ids, sc_noOp),
 147                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 148                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 149 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
 150         { LDAP_CONTROL_MODIFY_INCREMENT,
 151                 (int)offsetof(struct slap_control_ids, sc_modifyIncrement),
 152                 SLAP_CTRL_HIDE|SLAP_CTRL_MODIFY, NULL,
 153                 parseModifyIncrement, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 154 #endif
 155         { LDAP_CONTROL_MANAGEDSAIT,
 156                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 157                 SLAP_CTRL_ACCESS, NULL,
 158                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 159         { LDAP_CONTROL_PROXY_AUTHZ,
 160                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 161                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS, proxy_authz_extops,
 162                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 163         { NULL, 0, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 164 };
 165
 166 /*
 167  * Register a supported control.
 168  *
 169  * This can be called by an OpenLDAP plugin or, indirectly, by a
 170  * SLAPI plugin calling slapi_register_supported_control().
 171  */
 172 int
 173 register_supported_control(const char *controloid,
 174         slap_mask_t controlmask,
 175         char **controlexops,
 176         SLAP_CTRL_PARSE_FN *controlparsefn,
 177         int *controlcid)
 178 {
 179         struct slap_control *sc;
 180         int i;
 181
 182         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 183                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 184                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 185                 SLAP_MAX_CIDS, 0, 0 );
 186                 return LDAP_OTHER;
 187         }
 188
 189         if ( controloid == NULL ) return LDAP_PARAM_ERROR;
 190
 191         /* sanity check - should never happen */
 192         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 193                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 194                         Debug( LDAP_DEBUG_ANY,
 195                                 "Control %s already registered.\n",
 196                                 controloid, 0, 0 );
 197                         return LDAP_PARAM_ERROR;
 198                 }
 199         }
 200
 201         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 202         if ( sc == NULL ) return LDAP_NO_MEMORY;
 203
 204         sc->sc_oid = ch_strdup( controloid );
 205         sc->sc_mask = controlmask;
 206         if ( controlexops != NULL ) {
 207                 sc->sc_extendedops = ldap_charray_dup( controlexops );
 208                 if ( sc->sc_extendedops == NULL ) {
 209                         ch_free( sc );
 210                         return LDAP_NO_MEMORY;
 211                 }
 212         } else {
 213                 sc->sc_extendedops = NULL;
 214         }
 215         sc->sc_parse = controlparsefn;
 216
 217         if ( controlcid ) *controlcid = num_known_controls;
 218         sc->sc_cid = num_known_controls;
 219
 220         /* Update slap_known_controls, too. */
 221         slap_known_controls[num_known_controls-1] = sc->sc_oid;
 222         slap_known_controls[num_known_controls++] = NULL;
 223
 224         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 225         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 226         return LDAP_SUCCESS;
 227 }
 228
 229 /*
 230  * One-time initialization of internal controls.
 231  */
 232 int
 233 slap_controls_init( void )
 234 {
 235         int i, rc;
 236         struct slap_control *sc;
 237
 238         rc = LDAP_SUCCESS;
 239
 240         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 241                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 242                 rc = register_supported_control( control_defs[i].sc_oid,
 243                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 244                         control_defs[i].sc_parse, cid );
 245                 if ( rc != LDAP_SUCCESS ) break;
 246         }
 247
 248         return rc;
 249 }
 250
 251 /*
 252  * Free memory associated with list of supported controls.
 253  */
 254 void
 255 controls_destroy( void )
 256 {
 257         struct slap_control *sc;
 258
 259         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 260                 sc = LDAP_SLIST_FIRST(&controls_list);
 261                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 262
 263                 ch_free( sc->sc_oid );
 264                 if ( sc->sc_extendedops != NULL ) {
 265                         ldap_charray_free( sc->sc_extendedops );
 266                 }
 267                 ch_free( sc );
 268         }
 269 }
 270
 271 /*
 272  * Format the supportedControl attribute of the root DSE,
 273  * detailing which controls are supported by the directory
 274  * server.
 275  */
 276 int
 277 controls_root_dse_info( Entry *e )
 278 {
 279         AttributeDescription *ad_supportedControl
 280                 = slap_schema.si_ad_supportedControl;
 281         struct berval vals[2];
 282         struct slap_control *sc;
 283
 284         vals[1].bv_val = NULL;
 285         vals[1].bv_len = 0;
 286
 287         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 288                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 289
 290                 vals[0].bv_val = sc->sc_oid;
 291                 vals[0].bv_len = strlen( sc->sc_oid );
 292
 293                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 294                         return -1;
 295                 }
 296         }
 297
 298         return 0;
 299 }
 300
 301 /*
 302  * Return a list of OIDs and operation masks for supported
 303  * controls. Used by SLAPI.
 304  */
 305 int
 306 get_supported_controls(char ***ctrloidsp,
 307         slap_mask_t **ctrlmasks)
 308 {
 309         int i, n;
 310         char **oids;
 311         slap_mask_t *masks;
 312         int rc;
 313         struct slap_control *sc;
 314
 315         n = 0;
 316
 317         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 318                 n++;
 319         }
 320
 321         if ( n == 0 ) {
 322                 *ctrloidsp = NULL;
 323                 *ctrlmasks = NULL;
 324                 return LDAP_SUCCESS;
 325         }
 326
 327         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 328         if ( oids == NULL ) {
 329                 return LDAP_NO_MEMORY;
 330         }
 331         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 332         if  ( masks == NULL ) {
 333                 ch_free( oids );
 334                 return LDAP_NO_MEMORY;
 335         }
 336
 337         n = 0;
 338
 339         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 340                 oids[n] = ch_strdup( sc->sc_oid );
 341                 masks[n] = sc->sc_mask;
 342                 n++;
 343         }
 344         oids[n] = NULL;
 345         masks[n] = 0;
 346
 347         *ctrloidsp = oids;
 348         *ctrlmasks = masks;
 349
 350         return LDAP_SUCCESS;
 351 }
 352
 353 /*
 354  * Find a control given its OID.
 355  */
 356 static struct slap_control *
 357 find_ctrl( const char *oid )
 358 {
 359         struct slap_control *sc;
 360
 361         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 362                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 363                         return sc;
 364                 }
 365         }
 366
 367         return NULL;
 368 }
 369
 370 int
 371 slap_find_control_id(
 372         const char *oid,
 373         int *cid )
 374 {
 375         struct slap_control *ctrl = find_ctrl( oid );
 376         if ( ctrl ) {
 377                 if ( cid ) *cid = ctrl->sc_cid;
 378                 return LDAP_SUCCESS;
 379         }
 380         return LDAP_CONTROL_NOT_FOUND;
 381 }
 382
 383 int
 384 slap_global_control( Operation *op, const char *oid )
 385 {
 386         struct slap_control *ctrl = find_ctrl( oid );
 387
 388         if ( ctrl == NULL ) {
 389                 /* should not be reachable */
 390                 Debug( LDAP_DEBUG_ANY,
 391                         "slap_global_control: unrecognized control: %s\n",
 392                         oid, 0, 0 );
 393                 assert( 0 );
 394                 return 0;
 395         }
 396
 397         if ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) return 1;
 398
 399         if (( op->o_tag & LDAP_REQ_SEARCH ) &&
 400                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ))
 401         {
 402                 return 1;
 403         }
 404
 405         Debug( LDAP_DEBUG_ANY,
 406                 "slap_global_control: unavailable control: %s\n",
 407                 oid, 0, 0 );
 408         return 0;
 409 }
 410
 411 void slap_free_ctrls(
 412         Operation *op,
 413         LDAPControl **ctrls )
 414 {
 415         int i;
 416
 417         for (i=0; ctrls[i]; i++) {
 418                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 419         }
 420         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 421 }
 422
 423 int get_ctrls(
 424         Operation *op,
 425         SlapReply *rs,
 426         int sendres )
 427 {
 428         int nctrls = 0;
 429         ber_tag_t tag;
 430         ber_len_t len;
 431         char *opaque;
 432         BerElement *ber = op->o_ber;
 433         struct slap_control *sc;
 434         struct berval bv;
 435
 436         len = ber_pvt_ber_remaining(ber);
 437
 438         if( len == 0) {
 439                 /* no controls */
 440                 rs->sr_err = LDAP_SUCCESS;
 441                 return rs->sr_err;
 442         }
 443
 444         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 445                 if( tag == LBER_ERROR ) {
 446                         rs->sr_err = SLAPD_DISCONNECT;
 447                         rs->sr_text = "unexpected data in PDU";
 448                 }
 449
 450                 goto return_results;
 451         }
 452
 453         Debug( LDAP_DEBUG_TRACE,
 454                 "=> get_ctrls\n", 0, 0, 0 );
 455
 456         if( op->o_protocol < LDAP_VERSION3 ) {
 457                 rs->sr_err = SLAPD_DISCONNECT;
 458                 rs->sr_text = "controls require LDAPv3";
 459                 goto return_results;
 460         }
 461
 462         /* one for first control, one for termination */
 463         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 464
 465 #if 0
 466         if( op->ctrls == NULL ) {
 467                 rs->sr_err = LDAP_NO_MEMORY;
 468                 rs->sr_text = "no memory";
 469                 goto return_results;
 470         }
 471 #endif
 472
 473         op->o_ctrls[nctrls] = NULL;
 474
 475         /* step through each element */
 476         for( tag = ber_first_element( ber, &len, &opaque );
 477                 tag != LBER_ERROR;
 478                 tag = ber_next_element( ber, &len, opaque ) )
 479         {
 480                 LDAPControl *c;
 481                 LDAPControl **tctrls;
 482
 483                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 484                 memset(c, 0, sizeof(LDAPControl));
 485
 486                 /* allocate pointer space for current controls (nctrls)
 487                  * + this control + extra NULL
 488                  */
 489                 tctrls = op->o_tmprealloc( op->o_ctrls,
 490                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 491
 492 #if 0
 493                 if( tctrls == NULL ) {
 494                         ch_free( c );
 495                         ldap_controls_free(op->o_ctrls);
 496                         op->o_ctrls = NULL;
 497
 498                         rs->sr_err = LDAP_NO_MEMORY;
 499                         rs->sr_text = "no memory";
 500                         goto return_results;
 501                 }
 502 #endif
 503                 op->o_ctrls = tctrls;
 504
 505                 op->o_ctrls[nctrls++] = c;
 506                 op->o_ctrls[nctrls] = NULL;
 507
 508                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 509                 c->ldctl_oid = bv.bv_val;
 510
 511                 if( tag == LBER_ERROR ) {
 512                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 513                                 0, 0, 0 );
 514
 515                         slap_free_ctrls( op, op->o_ctrls );
 516                         op->o_ctrls = NULL;
 517                         rs->sr_err = SLAPD_DISCONNECT;
 518                         rs->sr_text = "decoding controls error";
 519                         goto return_results;
 520
 521                 } else if( c->ldctl_oid == NULL ) {
 522                         Debug( LDAP_DEBUG_TRACE,
 523                                 "get_ctrls: conn %lu got emtpy OID.\n",
 524                                 op->o_connid, 0, 0 );
 525
 526                         slap_free_ctrls( op, op->o_ctrls );
 527                         op->o_ctrls = NULL;
 528                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 529                         rs->sr_text = "OID field is empty";
 530                         goto return_results;
 531                 }
 532
 533                 tag = ber_peek_tag( ber, &len );
 534
 535                 if( tag == LBER_BOOLEAN ) {
 536                         ber_int_t crit;
 537                         tag = ber_scanf( ber, "b", &crit );
 538
 539                         if( tag == LBER_ERROR ) {
 540                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 541                                         0, 0, 0 );
 542                                 slap_free_ctrls( op, op->o_ctrls );
 543                                 op->o_ctrls = NULL;
 544                                 rs->sr_err = SLAPD_DISCONNECT;
 545                                 rs->sr_text = "decoding controls error";
 546                                 goto return_results;
 547                         }
 548
 549                         c->ldctl_iscritical = (crit != 0);
 550                         tag = ber_peek_tag( ber, &len );
 551                 }
 552
 553                 if( tag == LBER_OCTETSTRING ) {
 554                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 555
 556                         if( tag == LBER_ERROR ) {
 557                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 558                                         "%s (%scritical): get value failed.\n",
 559                                         op->o_connid, c->ldctl_oid,
 560                                         c->ldctl_iscritical ? "" : "non" );
 561                                 slap_free_ctrls( op, op->o_ctrls );
 562                                 op->o_ctrls = NULL;
 563                                 rs->sr_err = SLAPD_DISCONNECT;
 564                                 rs->sr_text = "decoding controls error";
 565                                 goto return_results;
 566                         }
 567                 }
 568
 569                 Debug( LDAP_DEBUG_TRACE,
 570                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 571                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 572
 573                 sc = find_ctrl( c->ldctl_oid );
 574                 if( sc != NULL ) {
 575                         /* recognized control */
 576                         slap_mask_t tagmask;
 577                         switch( op->o_tag ) {
 578                         case LDAP_REQ_ADD:
 579                                 tagmask = SLAP_CTRL_ADD;
 580                                 break;
 581                         case LDAP_REQ_BIND:
 582                                 tagmask = SLAP_CTRL_BIND;
 583                                 break;
 584                         case LDAP_REQ_COMPARE:
 585                                 tagmask = SLAP_CTRL_COMPARE;
 586                                 break;
 587                         case LDAP_REQ_DELETE:
 588                                 tagmask = SLAP_CTRL_DELETE;
 589                                 break;
 590                         case LDAP_REQ_MODIFY:
 591                                 tagmask = SLAP_CTRL_MODIFY;
 592                                 break;
 593                         case LDAP_REQ_RENAME:
 594                                 tagmask = SLAP_CTRL_RENAME;
 595                                 break;
 596                         case LDAP_REQ_SEARCH:
 597                                 tagmask = SLAP_CTRL_SEARCH;
 598                                 break;
 599                         case LDAP_REQ_UNBIND:
 600                                 tagmask = SLAP_CTRL_UNBIND;
 601                                 break;
 602                         case LDAP_REQ_ABANDON:
 603                                 tagmask = SLAP_CTRL_ABANDON;
 604                                 break;
 605                         case LDAP_REQ_EXTENDED:
 606                                 tagmask=~0L;
 607                                 assert( op->ore_reqoid.bv_val != NULL );
 608                                 if( sc->sc_extendedops != NULL ) {
 609                                         int i;
 610                                         for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 611                                                 if( strcmp( op->ore_reqoid.bv_val,
 612                                                         sc->sc_extendedops[i] ) == 0 )
 613                                                 {
 614                                                         tagmask=0L;
 615                                                         break;
 616                                                 }
 617                                         }
 618                                 }
 619                                 break;
 620                         default:
 621                                 rs->sr_err = LDAP_OTHER;
 622                                 rs->sr_text = "controls internal error";
 623                                 goto return_results;
 624                         }
 625
 626                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 627                                 /* available extension */
 628                                 int     rc;
 629
 630                                 if( !sc->sc_parse ) {
 631                                         rs->sr_err = LDAP_OTHER;
 632                                         rs->sr_text = "not yet implemented";
 633                                         goto return_results;
 634                                 }
 635
 636                                 rc = sc->sc_parse( op, rs, c );
 637                                 if ( rc ) {
 638                                         assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 639                                         rs->sr_err = rc;
 640                                         goto return_results;
 641                                 }
 642
 643 #ifdef SLAP_CONTROL_AVAILABILITY_KLUDGE
 644                                 /* backend_check_controls() kludge */
 645                                 if ( sc->sc_mask & SLAP_CTRL_GLOBAL ) {
 646                                         /* KLUDGE: disable backend_control() check */
 647                                         c->ldctl_iscritical = 0;
 648
 649                                 } else if ( tagmask == SLAP_CTRL_SEARCH &&
 650                                         sc->sc_mask & SLAP_CTRL_GLOBAL_SEARCH )
 651                                 {
 652                                         /* KLUDGE: disable backend_control() check */
 653                                         c->ldctl_iscritical = 0;
 654
 655                                 } else {
 656                                         /* KLUDGE: enable backend_control() check */
 657                                         c->ldctl_iscritical = 1;
 658                                 }
 659 #endif
 660
 661                         } else if( c->ldctl_iscritical ) {
 662                                 /* unavailable CRITICAL control */
 663                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 664                                 rs->sr_text = "critical extension is unavailable";
 665                                 goto return_results;
 666                         }
 667
 668                 } else if( c->ldctl_iscritical ) {
 669                         /* unrecognized CRITICAL control */
 670                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 671                         rs->sr_text = "critical extension is not recognized";
 672                         goto return_results;
 673                 }
 674 next_ctrl:;
 675         }
 676
 677 return_results:
 678         Debug( LDAP_DEBUG_TRACE,
 679                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 680                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 681
 682         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 683                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 684                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 685                         send_ldap_disconnect( op, rs );
 686                         rs->sr_err = SLAPD_DISCONNECT;
 687                 } else {
 688                         send_ldap_result( op, rs );
 689                 }
 690         }
 691
 692         return rs->sr_err;
 693 }
 694
 695 static int parseModifyIncrement (
 696         Operation *op,
 697         SlapReply *rs,
 698         LDAPControl *ctrl )
 699 {
 700 #if 0
 701         if ( op->o_modifyIncrement != SLAP_CONTROL_NONE ) {
 702                 rs->sr_text = "modifyIncrement control specified multiple times";
 703                 return LDAP_PROTOCOL_ERROR;
 704         }
 705 #endif
 706
 707         if ( ctrl->ldctl_value.bv_len ) {
 708                 rs->sr_text = "modifyIncrement control value not empty";
 709                 return LDAP_PROTOCOL_ERROR;
 710         }
 711
 712 #if 0
 713         op->o_modifyIncrement = ctrl->ldctl_iscritical
 714                 ? SLAP_CONTROL_CRITICAL
 715                 : SLAP_CONTROL_NONCRITICAL;
 716 #endif
 717
 718         return LDAP_SUCCESS;
 719 }
 720
 721 static int parseManageDSAit (
 722         Operation *op,
 723         SlapReply *rs,
 724         LDAPControl *ctrl )
 725 {
 726         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 727                 rs->sr_text = "manageDSAit control specified multiple times";
 728                 return LDAP_PROTOCOL_ERROR;
 729         }
 730
 731         if ( ctrl->ldctl_value.bv_len ) {
 732                 rs->sr_text = "manageDSAit control value not empty";
 733                 return LDAP_PROTOCOL_ERROR;
 734         }
 735
 736         op->o_managedsait = ctrl->ldctl_iscritical
 737                 ? SLAP_CONTROL_CRITICAL
 738                 : SLAP_CONTROL_NONCRITICAL;
 739
 740         return LDAP_SUCCESS;
 741 }
 742
 743 static int parseProxyAuthz (
 744         Operation *op,
 745         SlapReply *rs,
 746         LDAPControl *ctrl )
 747 {
 748         int             rc;
 749         struct berval   dn = BER_BVNULL;
 750
 751         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 752                 rs->sr_text = "proxy authorization control specified multiple times";
 753                 return LDAP_PROTOCOL_ERROR;
 754         }
 755
 756         op->o_proxy_authz = ctrl->ldctl_iscritical
 757                 ? SLAP_CONTROL_CRITICAL
 758                 : SLAP_CONTROL_NONCRITICAL;
 759
 760         Debug( LDAP_DEBUG_ARGS,
 761                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 762                 op->o_connid,
 763                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 764                 0 );
 765
 766         if( ctrl->ldctl_value.bv_len == 0 ) {
 767                 Debug( LDAP_DEBUG_TRACE,
 768                         "parseProxyAuthz: conn=%lu anonymous\n",
 769                         op->o_connid, 0, 0 );
 770
 771                 /* anonymous */
 772                 free( op->o_dn.bv_val );
 773                 op->o_dn.bv_len = 0;
 774                 op->o_dn.bv_val = ch_strdup( "" );
 775
 776                 free( op->o_ndn.bv_val );
 777                 op->o_ndn.bv_len = 0;
 778                 op->o_ndn.bv_val = ch_strdup( "" );
 779
 780                 return LDAP_SUCCESS;
 781         }
 782
 783         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 784                         NULL, &dn, SLAP_GETDN_AUTHZID );
 785
 786         /* FIXME: empty DN in proxyAuthz control should be legal... */
 787         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 788                 if ( dn.bv_val ) {
 789                         ch_free( dn.bv_val );
 790                 }
 791                 rs->sr_text = "authzId mapping failed";
 792                 return LDAP_PROXY_AUTHZ_FAILURE;
 793         }
 794
 795         Debug( LDAP_DEBUG_TRACE,
 796                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 797                 op->o_connid,
 798                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 799
 800         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 801
 802         if( rc ) {
 803                 ch_free( dn.bv_val );
 804                 rs->sr_text = "not authorized to assume identity";
 805                 return LDAP_PROXY_AUTHZ_FAILURE;
 806         }
 807
 808         ch_free( op->o_dn.bv_val );
 809         ch_free( op->o_ndn.bv_val );
 810
 811         op->o_dn.bv_val = NULL;
 812         op->o_ndn = dn;
 813
 814         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 815             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 816
 817         /*
 818          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 819          * from now on op->o_dn is normalized
 820          */
 821         ber_dupbv( &op->o_dn, &dn );
 822
 823         return LDAP_SUCCESS;
 824 }
 825
 826 static int parseNoOp (
 827         Operation *op,
 828         SlapReply *rs,
 829         LDAPControl *ctrl )
 830 {
 831         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 832                 rs->sr_text = "noop control specified multiple times";
 833                 return LDAP_PROTOCOL_ERROR;
 834         }
 835
 836         if ( ctrl->ldctl_value.bv_len ) {
 837                 rs->sr_text = "noop control value not empty";
 838                 return LDAP_PROTOCOL_ERROR;
 839         }
 840
 841         op->o_noop = ctrl->ldctl_iscritical
 842                 ? SLAP_CONTROL_CRITICAL
 843                 : SLAP_CONTROL_NONCRITICAL;
 844
 845         return LDAP_SUCCESS;
 846 }
 847
 848 static int parsePagedResults (
 849         Operation *op,
 850         SlapReply *rs,
 851         LDAPControl *ctrl )
 852 {
 853         int             rc = LDAP_SUCCESS;
 854         ber_tag_t       tag;
 855         ber_int_t       size;
 856         BerElement      *ber;
 857         struct berval   cookie = BER_BVNULL;
 858         PagedResultsState       *ps;
 859
 860         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
 861                 rs->sr_text = "paged results control specified multiple times";
 862                 return LDAP_PROTOCOL_ERROR;
 863         }
 864
 865         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 866                 rs->sr_text = "paged results control value is empty (or absent)";
 867                 return LDAP_PROTOCOL_ERROR;
 868         }
 869
 870         /* Parse the control value
 871          *      realSearchControlValue ::= SEQUENCE {
 872          *              size    INTEGER (0..maxInt),
 873          *                              -- requested page size from client
 874          *                              -- result set size estimate from server
 875          *              cookie  OCTET STRING
 876          * }
 877          */
 878         ber = ber_init( &ctrl->ldctl_value );
 879         if ( ber == NULL ) {
 880                 rs->sr_text = "internal error";
 881                 return LDAP_OTHER;
 882         }
 883
 884         tag = ber_scanf( ber, "{im}", &size, &cookie );
 885
 886         if ( tag == LBER_ERROR ) {
 887                 rs->sr_text = "paged results control could not be decoded";
 888                 rc = LDAP_PROTOCOL_ERROR;
 889                 goto done;
 890         }
 891
 892         if ( size < 0 ) {
 893                 rs->sr_text = "paged results control size invalid";
 894                 rc = LDAP_PROTOCOL_ERROR;
 895                 goto done;
 896         }
 897
 898 #if 0
 899         /* defer cookie decoding/checks to backend... */
 900         if ( cookie.bv_len ) {
 901                 PagedResultsCookie reqcookie;
 902                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 903                         /* bad cookie */
 904                         rs->sr_text = "paged results cookie is invalid";
 905                         rc = LDAP_PROTOCOL_ERROR;
 906                         goto done;
 907                 }
 908
 909                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 910
 911                 if ( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 912                         /* bad cookie */
 913                         rs->sr_text = "paged results cookie is invalid";
 914                         rc = LDAP_PROTOCOL_ERROR;
 915                         goto done;
 916
 917                 } else if ( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 918                         rs->sr_text = "paged results cookie is invalid or old";
 919                         rc = LDAP_UNWILLING_TO_PERFORM;
 920                         goto done;
 921                 }
 922
 923         } else {
 924                 /* Initial request.  Initialize state. */
 925 #if 0
 926                 if ( op->o_conn->c_pagedresults_state.ps_cookie != 0 ) {
 927                         /* There's another pagedResults control on the
 928                          * same connection; reject new pagedResults controls
 929                          * (allowed by RFC2696) */
 930                         rs->sr_text = "paged results cookie unavailable; try later";
 931                         rc = LDAP_UNWILLING_TO_PERFORM;
 932                         goto done;
 933                 }
 934 #endif
 935                 op->o_pagedresults_state.ps_cookie = 0;
 936                 op->o_pagedresults_state.ps_count = 0;
 937         }
 938 #endif
 939
 940         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
 941         *ps = op->o_conn->c_pagedresults_state;
 942         ps->ps_size = size;
 943         op->o_pagedresults_state = ps;
 944
 945         /* NOTE: according to RFC 2696 3.:
 946
 947     If the page size is greater than or equal to the sizeLimit value, the
 948     server should ignore the control as the request can be satisfied in a
 949     single page.
 950
 951          * NOTE: this assumes that the op->ors_slimit be set
 952          * before the controls are parsed.
 953          */
 954
 955         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
 956                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
 957
 958         } else if ( ctrl->ldctl_iscritical ) {
 959                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
 960
 961         } else {
 962                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
 963         }
 964
 965 done:;
 966         (void)ber_free( ber, 1 );
 967         return rc;
 968 }
 969
 970 static int parseAssert (
 971         Operation *op,
 972         SlapReply *rs,
 973         LDAPControl *ctrl )
 974 {
 975         BerElement      *ber;
 976         struct berval   fstr = BER_BVNULL;
 977         const char *err_msg = "";
 978
 979         if ( op->o_assert != SLAP_CONTROL_NONE ) {
 980                 rs->sr_text = "assert control specified multiple times";
 981                 return LDAP_PROTOCOL_ERROR;
 982         }
 983
 984         if ( ctrl->ldctl_value.bv_len == 0 ) {
 985                 rs->sr_text = "assert control value is empty (or absent)";
 986                 return LDAP_PROTOCOL_ERROR;
 987         }
 988
 989         ber = ber_init( &(ctrl->ldctl_value) );
 990         if (ber == NULL) {
 991                 rs->sr_text = "assert control: internal error";
 992                 return LDAP_OTHER;
 993         }
 994
 995         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion), &rs->sr_text);
 996
 997         if( rs->sr_err != LDAP_SUCCESS ) {
 998                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 999                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1000                         send_ldap_disconnect( op, rs );
1001                         rs->sr_err = SLAPD_DISCONNECT;
1002                 } else {
1003                         send_ldap_result( op, rs );
1004                 }
1005                 if( op->o_assertion != NULL ) {
1006                         filter_free_x( op, op->o_assertion );
1007                 }
1008                 return rs->sr_err;
1009         }
1010
1011 #ifdef LDAP_DEBUG
1012         filter2bv_x( op, op->o_assertion, &fstr );
1013
1014         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1015                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1016         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1017 #endif
1018
1019         op->o_assert = ctrl->ldctl_iscritical
1020                 ? SLAP_CONTROL_CRITICAL
1021                 : SLAP_CONTROL_NONCRITICAL;
1022
1023         rs->sr_err = LDAP_SUCCESS;
1024         return LDAP_SUCCESS;
1025 }
1026
1027 static int parsePreRead (
1028         Operation *op,
1029         SlapReply *rs,
1030         LDAPControl *ctrl )
1031 {
1032         ber_len_t siz, off, i;
1033         AttributeName *an = NULL;
1034         BerElement      *ber;
1035
1036         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1037                 rs->sr_text = "preread control specified multiple times";
1038                 return LDAP_PROTOCOL_ERROR;
1039         }
1040
1041         if ( ctrl->ldctl_value.bv_len == 0 ) {
1042                 rs->sr_text = "preread control value is empty (or absent)";
1043                 return LDAP_PROTOCOL_ERROR;
1044         }
1045
1046         ber = ber_init( &(ctrl->ldctl_value) );
1047         if (ber == NULL) {
1048                 rs->sr_text = "preread control: internal error";
1049                 return LDAP_OTHER;
1050         }
1051
1052         siz = sizeof( AttributeName );
1053         off = offsetof( AttributeName, an_name );
1054         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1055                 rs->sr_text = "preread control: decoding error";
1056                 return LDAP_PROTOCOL_ERROR;
1057         }
1058
1059         for( i=0; i<siz; i++ ) {
1060                 int             rc = LDAP_SUCCESS;
1061                 const char      *dummy = NULL;
1062
1063                 an[i].an_desc = NULL;
1064                 an[i].an_oc = NULL;
1065                 an[i].an_oc_exclude = 0;
1066                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1067                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1068                         rs->sr_text = dummy
1069                                 ? dummy
1070                                 : "postread control: unknown attributeType";
1071                         return rc;
1072                 }
1073         }
1074
1075         op->o_preread = ctrl->ldctl_iscritical
1076                 ? SLAP_CONTROL_CRITICAL
1077                 : SLAP_CONTROL_NONCRITICAL;
1078
1079         op->o_preread_attrs = an;
1080
1081         rs->sr_err = LDAP_SUCCESS;
1082         return LDAP_SUCCESS;
1083 }
1084
1085 static int parsePostRead (
1086         Operation *op,
1087         SlapReply *rs,
1088         LDAPControl *ctrl )
1089 {
1090         ber_len_t siz, off, i;
1091         AttributeName *an = NULL;
1092         BerElement      *ber;
1093
1094         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1095                 rs->sr_text = "postread control specified multiple times";
1096                 return LDAP_PROTOCOL_ERROR;
1097         }
1098
1099         if ( ctrl->ldctl_value.bv_len == 0 ) {
1100                 rs->sr_text = "postread control value is empty (or absent)";
1101                 return LDAP_PROTOCOL_ERROR;
1102         }
1103
1104         ber = ber_init( &(ctrl->ldctl_value) );
1105         if (ber == NULL) {
1106                 rs->sr_text = "postread control: internal error";
1107                 return LDAP_OTHER;
1108         }
1109
1110         siz = sizeof( AttributeName );
1111         off = offsetof( AttributeName, an_name );
1112         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1113                 rs->sr_text = "postread control: decoding error";
1114                 return LDAP_PROTOCOL_ERROR;
1115         }
1116
1117         for( i=0; i<siz; i++ ) {
1118                 int             rc = LDAP_SUCCESS;
1119                 const char      *dummy = NULL;
1120
1121                 an[i].an_desc = NULL;
1122                 an[i].an_oc = NULL;
1123                 an[i].an_oc_exclude = 0;
1124                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1125                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1126                         rs->sr_text = dummy
1127                                 ? dummy
1128                                 : "postread control: unknown attributeType";
1129                         return rc;
1130                 }
1131         }
1132
1133         op->o_postread = ctrl->ldctl_iscritical
1134                 ? SLAP_CONTROL_CRITICAL
1135                 : SLAP_CONTROL_NONCRITICAL;
1136
1137         op->o_postread_attrs = an;
1138
1139         rs->sr_err = LDAP_SUCCESS;
1140         return LDAP_SUCCESS;
1141 }
1142
1143 int parseValuesReturnFilter (
1144         Operation *op,
1145         SlapReply *rs,
1146         LDAPControl *ctrl )
1147 {
1148         BerElement      *ber;
1149         struct berval   fstr = BER_BVNULL;
1150         const char *err_msg = "";
1151
1152         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1153                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1154                 return LDAP_PROTOCOL_ERROR;
1155         }
1156
1157         if ( ctrl->ldctl_value.bv_len == 0 ) {
1158                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1159                 return LDAP_PROTOCOL_ERROR;
1160         }
1161
1162         ber = ber_init( &(ctrl->ldctl_value) );
1163         if (ber == NULL) {
1164                 rs->sr_text = "internal error";
1165                 return LDAP_OTHER;
1166         }
1167
1168         rs->sr_err = get_vrFilter( op, ber, (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1169
1170         if( rs->sr_err != LDAP_SUCCESS ) {
1171                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1172                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1173                         send_ldap_disconnect( op, rs );
1174                         rs->sr_err = SLAPD_DISCONNECT;
1175                 } else {
1176                         send_ldap_result( op, rs );
1177                 }
1178                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1179         }
1180 #ifdef LDAP_DEBUG
1181         else {
1182                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1183         }
1184
1185         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1186                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1187         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1188 #endif
1189
1190         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1191                 ? SLAP_CONTROL_CRITICAL
1192                 : SLAP_CONTROL_NONCRITICAL;
1193
1194         rs->sr_err = LDAP_SUCCESS;
1195         return LDAP_SUCCESS;
1196 }
1197
1198 #ifdef LDAP_CONTROL_SUBENTRIES
1199 static int parseSubentries (
1200         Operation *op,
1201         SlapReply *rs,
1202         LDAPControl *ctrl )
1203 {
1204         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1205                 rs->sr_text = "subentries control specified multiple times";
1206                 return LDAP_PROTOCOL_ERROR;
1207         }
1208
1209         /* FIXME: should use BER library */
1210         if( ( ctrl->ldctl_value.bv_len != 3 )
1211                 && ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1212                 && ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1213         {
1214                 rs->sr_text = "subentries control value encoding is bogus";
1215                 return LDAP_PROTOCOL_ERROR;
1216         }
1217
1218         op->o_subentries = ctrl->ldctl_iscritical
1219                 ? SLAP_CONTROL_CRITICAL
1220                 : SLAP_CONTROL_NONCRITICAL;
1221
1222         if ( (void *)(ctrl->ldctl_value.bv_val[2] != 0x00))
1223                 set_subentries_visibility( op );
1224
1225         return LDAP_SUCCESS;
1226 }
1227 #endif
1228
1229 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1230 static int parsePermissiveModify (
1231         Operation *op,
1232         SlapReply *rs,
1233         LDAPControl *ctrl )
1234 {
1235         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1236                 rs->sr_text = "permissiveModify control specified multiple times";
1237                 return LDAP_PROTOCOL_ERROR;
1238         }
1239
1240         if ( ctrl->ldctl_value.bv_len ) {
1241                 rs->sr_text = "permissiveModify control value not empty";
1242                 return LDAP_PROTOCOL_ERROR;
1243         }
1244
1245         op->o_permissive_modify = ctrl->ldctl_iscritical
1246                 ? SLAP_CONTROL_CRITICAL
1247                 : SLAP_CONTROL_NONCRITICAL;
1248
1249         return LDAP_SUCCESS;
1250 }
1251 #endif
1252
1253 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1254 static int parseDomainScope (
1255         Operation *op,
1256         SlapReply *rs,
1257         LDAPControl *ctrl )
1258 {
1259         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1260                 rs->sr_text = "domainScope control specified multiple times";
1261                 return LDAP_PROTOCOL_ERROR;
1262         }
1263
1264         if ( ctrl->ldctl_value.bv_len ) {
1265                 rs->sr_text = "domainScope control value not empty";
1266                 return LDAP_PROTOCOL_ERROR;
1267         }
1268
1269         op->o_domain_scope = ctrl->ldctl_iscritical
1270                 ? SLAP_CONTROL_CRITICAL
1271                 : SLAP_CONTROL_NONCRITICAL;
1272
1273         return LDAP_SUCCESS;
1274 }
1275 #endif
1276
1277 #ifdef LDAP_CONTROL_X_TREE_DELETE
1278 static int parseTreeDelete (
1279         Operation *op,
1280         SlapReply *rs,
1281         LDAPControl *ctrl )
1282 {
1283         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1284                 rs->sr_text = "treeDelete control specified multiple times";
1285                 return LDAP_PROTOCOL_ERROR;
1286         }
1287
1288         if ( ctrl->ldctl_value.bv_len ) {
1289                 rs->sr_text = "treeDelete control value not empty";
1290                 return LDAP_PROTOCOL_ERROR;
1291         }
1292
1293         op->o_tree_delete = ctrl->ldctl_iscritical
1294                 ? SLAP_CONTROL_CRITICAL
1295                 : SLAP_CONTROL_NONCRITICAL;
1296
1297         return LDAP_SUCCESS;
1298 }
1299 #endif
1300
1301 #ifdef LDAP_CONTORL_X_SEARCH_OPTIONS
1302 static int parseSearchOptions (
1303         Operation *op,
1304         SlapReply *rs,
1305         LDAPControl *ctrl )
1306 {
1307         BerElement *ber;
1308         ber_int_t search_flags;
1309
1310         if ( ctrl->ldctl_value.bv_len == 0 ) {
1311                 rs->sr_text = "searchOptions control value not empty";
1312                 return LDAP_PROTOCOL_ERROR;
1313         }
1314
1315         ber = ber_init( &ctrl->ldctl_value );
1316         if( ber == NULL ) {
1317                 rs->sr_text = "internal error";
1318                 return LDAP_OTHER;
1319         }
1320
1321         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1322                 rs->sr_text = "searchOptions control decoding error";
1323                 return LDAP_PROTOCOL_ERROR;
1324         }
1325
1326         (void) ber_free( ber, 1 );
1327
1328         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1329                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1330                         rs->sr_text = "searchOptions control specified multiple times "
1331                                 "or with domainScope control";
1332                         return LDAP_PROTOCOL_ERROR;
1333                 }
1334
1335                 op->o_domain_scope = ctrl->ldctl_iscritical
1336                         ? SLAP_CONTROL_CRITICAL
1337                         : SLAP_CONTROL_NONCRITICAL;
1338         }
1339
1340         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1341                 /* Other search flags not recognised so far,
1342                  * including:
1343                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1344                  */
1345                 rs->sr_text = "searchOptions contained unrecongized flag";
1346                 return LDAP_UNWILLING_TO_PERFORM;
1347         }
1348
1349         return LDAP_SUCCESS;
1350 }
1351 #endif
1352