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 1998-2004 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
  41 #ifdef LDAP_CONTROL_SUBENTRIES
  42 static SLAP_CTRL_PARSE_FN parseSubentries;
  43 #endif
  44 static SLAP_CTRL_PARSE_FN parseLDAPsync;
  45
  46 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  47
  48 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  49 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  50
  51 struct slap_control {
  52         /* Control OID */
  53         char *sc_oid;
  54
  55         /* Operations supported by control */
  56         slap_mask_t sc_mask;
  57
  58         /* Extended operations supported by control */
  59         char **sc_extendedops;
  60
  61         /* Control parsing callback */
  62         SLAP_CTRL_PARSE_FN *sc_parse;
  63
  64         LDAP_SLIST_ENTRY(slap_control) sc_next;
  65 };
  66
  67 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  68         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  69
  70 /*
  71  * all known request control OIDs should be added to this list
  72  */
  73 char **slap_known_controls = NULL;
  74
  75 static char *proxy_authz_extops[] = {
  76         LDAP_EXOP_MODIFY_PASSWD,
  77         LDAP_EXOP_X_WHO_AM_I,
  78         NULL
  79 };
  80
  81 static struct slap_control control_defs[] = {
  82         { LDAP_CONTROL_ASSERT,
  83                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
  84                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  85         { LDAP_CONTROL_PRE_READ,
  86                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
  87                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  88         { LDAP_CONTROL_POST_READ,
  89                 SLAP_CTRL_HIDE|SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
  90                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  91         { LDAP_CONTROL_VALUESRETURNFILTER,
  92                 SLAP_CTRL_SEARCH, NULL,
  93                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  94         { LDAP_CONTROL_PAGEDRESULTS,
  95                 SLAP_CTRL_SEARCH, NULL,
  96                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  97 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
  98         { LDAP_CONTROL_X_DOMAIN_SCOPE,
  99                 SLAP_CTRL_FRONTEND|SLAP_CTRL_SEARCH, NULL,
 100                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 101 #endif
 102 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 103         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 104                 SLAP_CTRL_MODIFY, NULL,
 105                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 106 #endif
 107 #ifdef LDAP_CONTROL_X_TREE_DELETE
 108         { LDAP_CONTROL_X_TREE_DELETE,
 109                 SLAP_CTRL_DELETE, NULL,
 110                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 111 #endif
 112 #ifdef LDAP_CONTORL_X_SEARCH_OPTIONS
 113         { LDAP_CONTORL_X_SEARCH_OPTIONS,
 114                 SLAP_CTRL_FRONTEND|SLAP_CTRL_SEARCH, NULL,
 115                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 116 #endif
 117 #ifdef LDAP_CONTROL_SUBENTRIES
 118         { LDAP_CONTROL_SUBENTRIES,
 119                 SLAP_CTRL_SEARCH, NULL,
 120                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 121 #endif
 122         { LDAP_CONTROL_NOOP,
 123                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 124                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 125         { LDAP_CONTROL_SYNC,
 126                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
 127                 parseLDAPsync, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 128 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
 129         { LDAP_CONTROL_MODIFY_INCREMENT,
 130                 SLAP_CTRL_HIDE|SLAP_CTRL_MODIFY, NULL,
 131                 parseModifyIncrement, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 132 #endif
 133         { LDAP_CONTROL_MANAGEDSAIT,
 134                 SLAP_CTRL_ACCESS, NULL,
 135                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 136         { LDAP_CONTROL_PROXY_AUTHZ,
 137                 SLAP_CTRL_FRONTEND|SLAP_CTRL_ACCESS, proxy_authz_extops,
 138                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 139         { NULL, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 140 };
 141
 142 /*
 143  * Register a supported control.
 144  *
 145  * This can be called by an OpenLDAP plugin or, indirectly, by a
 146  * SLAPI plugin calling slapi_register_supported_control().
 147  */
 148 int
 149 register_supported_control(const char *controloid,
 150         slap_mask_t controlmask,
 151         char **controlexops,
 152         SLAP_CTRL_PARSE_FN *controlparsefn)
 153 {
 154         struct slap_control *sc;
 155         int i;
 156
 157         if ( controloid == NULL ) return LDAP_PARAM_ERROR;
 158
 159         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 160         if ( sc == NULL ) return LDAP_NO_MEMORY;
 161
 162         sc->sc_oid = ch_strdup( controloid );
 163         sc->sc_mask = controlmask;
 164         if ( controlexops != NULL ) {
 165                 sc->sc_extendedops = ldap_charray_dup( controlexops );
 166                 if ( sc->sc_extendedops == NULL ) {
 167                         ch_free( sc );
 168                         return LDAP_NO_MEMORY;
 169                 }
 170         } else {
 171                 sc->sc_extendedops = NULL;
 172         }
 173         sc->sc_parse = controlparsefn;
 174
 175         /* Update slap_known_controls, too. */
 176         if ( slap_known_controls == NULL ) {
 177                 slap_known_controls = (char **)SLAP_MALLOC( 2 * sizeof(char *) );
 178                 if ( slap_known_controls == NULL ) {
 179                         if ( sc->sc_extendedops != NULL ) {
 180                                 ldap_charray_free( sc->sc_extendedops );
 181                         }
 182                         ch_free( sc );
 183                         return LDAP_NO_MEMORY;
 184                 }
 185                 slap_known_controls[0] = ch_strdup( sc->sc_oid );
 186                 slap_known_controls[1] = NULL;
 187
 188         } else {
 189                 char **new_known_controls;
 190
 191                 for ( i = 0; slap_known_controls[i] != NULL; i++ ) {
 192                         /* EMPTY */ ;
 193                 }
 194
 195                 new_known_controls = (char **)SLAP_REALLOC(
 196                         slap_known_controls, (i + 2) * sizeof(char *) );
 197
 198                 if ( new_known_controls == NULL ) {
 199                         if ( sc->sc_extendedops != NULL ) {
 200                                 ldap_charray_free( sc->sc_extendedops );
 201                         }
 202                         ch_free( sc );
 203                         return LDAP_NO_MEMORY;
 204                 }
 205                 slap_known_controls = new_known_controls;
 206                 slap_known_controls[i++] = ch_strdup( sc->sc_oid );
 207                 slap_known_controls[i] = NULL;
 208         }
 209
 210         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 211         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 212         return LDAP_SUCCESS;
 213 }
 214
 215 /*
 216  * One-time initialization of internal controls.
 217  */
 218 int
 219 slap_controls_init( void )
 220 {
 221         int i, rc;
 222         struct slap_control *sc;
 223
 224         rc = LDAP_SUCCESS;
 225
 226         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 227                 rc = register_supported_control( control_defs[i].sc_oid,
 228                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 229                         control_defs[i].sc_parse );
 230                 if ( rc != LDAP_SUCCESS ) break;
 231         }
 232
 233         return rc;
 234 }
 235
 236 /*
 237  * Free memory associated with list of supported controls.
 238  */
 239 void
 240 controls_destroy( void )
 241 {
 242         struct slap_control *sc;
 243
 244         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 245                 sc = LDAP_SLIST_FIRST(&controls_list);
 246                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 247
 248                 ch_free( sc->sc_oid );
 249                 if ( sc->sc_extendedops != NULL ) {
 250                         ldap_charray_free( sc->sc_extendedops );
 251                 }
 252                 ch_free( sc );
 253         }
 254         ldap_charray_free( slap_known_controls );
 255 }
 256
 257 /*
 258  * Format the supportedControl attribute of the root DSE,
 259  * detailing which controls are supported by the directory
 260  * server.
 261  */
 262 int
 263 controls_root_dse_info( Entry *e )
 264 {
 265         AttributeDescription *ad_supportedControl
 266                 = slap_schema.si_ad_supportedControl;
 267         struct berval vals[2];
 268         struct slap_control *sc;
 269
 270         vals[1].bv_val = NULL;
 271         vals[1].bv_len = 0;
 272
 273         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 274                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 275
 276                 vals[0].bv_val = sc->sc_oid;
 277                 vals[0].bv_len = strlen( sc->sc_oid );
 278
 279                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 280                         return -1;
 281                 }
 282         }
 283
 284         return 0;
 285 }
 286
 287 /*
 288  * Return a list of OIDs and operation masks for supported
 289  * controls. Used by SLAPI.
 290  */
 291 int
 292 get_supported_controls(char ***ctrloidsp,
 293         slap_mask_t **ctrlmasks)
 294 {
 295         int i, n;
 296         char **oids;
 297         slap_mask_t *masks;
 298         int rc;
 299         struct slap_control *sc;
 300
 301         n = 0;
 302
 303         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 304                 n++;
 305         }
 306
 307         if ( n == 0 ) {
 308                 *ctrloidsp = NULL;
 309                 *ctrlmasks = NULL;
 310                 return LDAP_SUCCESS;
 311         }
 312
 313         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 314         if ( oids == NULL ) {
 315                 return LDAP_NO_MEMORY;
 316         }
 317         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 318         if  ( masks == NULL ) {
 319                 ch_free( oids );
 320                 return LDAP_NO_MEMORY;
 321         }
 322
 323         n = 0;
 324
 325         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 326                 oids[n] = ch_strdup( sc->sc_oid );
 327                 masks[n] = sc->sc_mask;
 328                 n++;
 329         }
 330         oids[n] = NULL;
 331         masks[n] = 0;
 332
 333         *ctrloidsp = oids;
 334         *ctrlmasks = masks;
 335
 336         return LDAP_SUCCESS;
 337 }
 338
 339 /*
 340  * Find a control given its OID.
 341  */
 342 static struct slap_control *
 343 find_ctrl( const char *oid )
 344 {
 345         struct slap_control *sc;
 346
 347         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 348                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 349                         return sc;
 350                 }
 351         }
 352
 353         return NULL;
 354 }
 355
 356 void slap_free_ctrls(
 357         Operation *op,
 358         LDAPControl **ctrls )
 359 {
 360         int i;
 361
 362         for (i=0; ctrls[i]; i++) {
 363                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 364         }
 365         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 366 }
 367
 368 int get_ctrls(
 369         Operation *op,
 370         SlapReply *rs,
 371         int sendres )
 372 {
 373         int nctrls = 0;
 374         ber_tag_t tag;
 375         ber_len_t len;
 376         char *opaque;
 377         BerElement *ber = op->o_ber;
 378         struct slap_control *sc;
 379         struct berval bv;
 380
 381         len = ber_pvt_ber_remaining(ber);
 382
 383         if( len == 0) {
 384                 /* no controls */
 385                 rs->sr_err = LDAP_SUCCESS;
 386                 return rs->sr_err;
 387         }
 388
 389         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 390                 if( tag == LBER_ERROR ) {
 391                         rs->sr_err = SLAPD_DISCONNECT;
 392                         rs->sr_text = "unexpected data in PDU";
 393                 }
 394
 395                 goto return_results;
 396         }
 397
 398         Debug( LDAP_DEBUG_TRACE,
 399                 "=> get_ctrls\n", 0, 0, 0 );
 400
 401         if( op->o_protocol < LDAP_VERSION3 ) {
 402                 rs->sr_err = SLAPD_DISCONNECT;
 403                 rs->sr_text = "controls require LDAPv3";
 404                 goto return_results;
 405         }
 406
 407         /* one for first control, one for termination */
 408         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 409
 410 #if 0
 411         if( op->ctrls == NULL ) {
 412                 rs->sr_err = LDAP_NO_MEMORY;
 413                 rs->sr_text = "no memory";
 414                 goto return_results;
 415         }
 416 #endif
 417
 418         op->o_ctrls[nctrls] = NULL;
 419
 420         /* step through each element */
 421         for( tag = ber_first_element( ber, &len, &opaque );
 422                 tag != LBER_ERROR;
 423                 tag = ber_next_element( ber, &len, opaque ) )
 424         {
 425                 LDAPControl *c;
 426                 LDAPControl **tctrls;
 427
 428                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 429                 memset(c, 0, sizeof(LDAPControl));
 430
 431                 /* allocate pointer space for current controls (nctrls)
 432                  * + this control + extra NULL
 433                  */
 434                 tctrls = op->o_tmprealloc( op->o_ctrls,
 435                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 436
 437 #if 0
 438                 if( tctrls == NULL ) {
 439                         ch_free( c );
 440                         ldap_controls_free(op->o_ctrls);
 441                         op->o_ctrls = NULL;
 442
 443                         rs->sr_err = LDAP_NO_MEMORY;
 444                         rs->sr_text = "no memory";
 445                         goto return_results;
 446                 }
 447 #endif
 448                 op->o_ctrls = tctrls;
 449
 450                 op->o_ctrls[nctrls++] = c;
 451                 op->o_ctrls[nctrls] = NULL;
 452
 453                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 454                 c->ldctl_oid = bv.bv_val;
 455
 456                 if( tag == LBER_ERROR ) {
 457                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 458                                 0, 0, 0 );
 459
 460                         slap_free_ctrls( op, op->o_ctrls );
 461                         op->o_ctrls = NULL;
 462                         rs->sr_err = SLAPD_DISCONNECT;
 463                         rs->sr_text = "decoding controls error";
 464                         goto return_results;
 465
 466                 } else if( c->ldctl_oid == NULL ) {
 467                         Debug( LDAP_DEBUG_TRACE,
 468                                 "get_ctrls: conn %lu got emtpy OID.\n",
 469                                 op->o_connid, 0, 0 );
 470
 471                         slap_free_ctrls( op, op->o_ctrls );
 472                         op->o_ctrls = NULL;
 473                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 474                         rs->sr_text = "OID field is empty";
 475                         goto return_results;
 476                 }
 477
 478                 tag = ber_peek_tag( ber, &len );
 479
 480                 if( tag == LBER_BOOLEAN ) {
 481                         ber_int_t crit;
 482                         tag = ber_scanf( ber, "b", &crit );
 483
 484                         if( tag == LBER_ERROR ) {
 485                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 486                                         0, 0, 0 );
 487                                 slap_free_ctrls( op, op->o_ctrls );
 488                                 op->o_ctrls = NULL;
 489                                 rs->sr_err = SLAPD_DISCONNECT;
 490                                 rs->sr_text = "decoding controls error";
 491                                 goto return_results;
 492                         }
 493
 494                         c->ldctl_iscritical = (crit != 0);
 495                         tag = ber_peek_tag( ber, &len );
 496                 }
 497
 498                 if( tag == LBER_OCTETSTRING ) {
 499                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 500
 501                         if( tag == LBER_ERROR ) {
 502                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 503                                         "%s (%scritical): get value failed.\n",
 504                                         op->o_connid, c->ldctl_oid,
 505                                         c->ldctl_iscritical ? "" : "non" );
 506                                 slap_free_ctrls( op, op->o_ctrls );
 507                                 op->o_ctrls = NULL;
 508                                 rs->sr_err = SLAPD_DISCONNECT;
 509                                 rs->sr_text = "decoding controls error";
 510                                 goto return_results;
 511                         }
 512                 }
 513
 514                 Debug( LDAP_DEBUG_TRACE,
 515                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 516                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 517
 518                 sc = find_ctrl( c->ldctl_oid );
 519                 if( sc != NULL ) {
 520                         /* recognized control */
 521                         slap_mask_t tagmask;
 522                         switch( op->o_tag ) {
 523                         case LDAP_REQ_ADD:
 524                                 tagmask = SLAP_CTRL_ADD;
 525                                 break;
 526                         case LDAP_REQ_BIND:
 527                                 tagmask = SLAP_CTRL_BIND;
 528                                 break;
 529                         case LDAP_REQ_COMPARE:
 530                                 tagmask = SLAP_CTRL_COMPARE;
 531                                 break;
 532                         case LDAP_REQ_DELETE:
 533                                 tagmask = SLAP_CTRL_DELETE;
 534                                 break;
 535                         case LDAP_REQ_MODIFY:
 536                                 tagmask = SLAP_CTRL_MODIFY;
 537                                 break;
 538                         case LDAP_REQ_RENAME:
 539                                 tagmask = SLAP_CTRL_RENAME;
 540                                 break;
 541                         case LDAP_REQ_SEARCH:
 542                                 tagmask = SLAP_CTRL_SEARCH;
 543                                 break;
 544                         case LDAP_REQ_UNBIND:
 545                                 tagmask = SLAP_CTRL_UNBIND;
 546                                 break;
 547                         case LDAP_REQ_ABANDON:
 548                                 tagmask = SLAP_CTRL_ABANDON;
 549                                 break;
 550                         case LDAP_REQ_EXTENDED:
 551                                 tagmask=~0L;
 552                                 assert( op->ore_reqoid.bv_val != NULL );
 553                                 if( sc->sc_extendedops != NULL ) {
 554                                         int i;
 555                                         for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 556                                                 if( strcmp( op->ore_reqoid.bv_val,
 557                                                         sc->sc_extendedops[i] ) == 0 )
 558                                                 {
 559                                                         tagmask=0L;
 560                                                         break;
 561                                                 }
 562                                         }
 563                                 }
 564                                 break;
 565                         default:
 566                                 rs->sr_err = LDAP_OTHER;
 567                                 rs->sr_text = "controls internal error";
 568                                 goto return_results;
 569                         }
 570
 571                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 572                                 /* available extension */
 573                                 int     rc;
 574
 575                                 if( !sc->sc_parse ) {
 576                                         rs->sr_err = LDAP_OTHER;
 577                                         rs->sr_text = "not yet implemented";
 578                                         goto return_results;
 579                                 }
 580
 581                                 rc = sc->sc_parse( op, rs, c );
 582                                 if ( rc ) {
 583                                         assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 584                                         rs->sr_err = rc;
 585                                         goto return_results;
 586                                 }
 587
 588                                 if ( sc->sc_mask & SLAP_CTRL_FRONTEND ) {
 589                                         /* kludge to disable backend_control() check */
 590                                         c->ldctl_iscritical = 0;
 591
 592                                 } else if ( tagmask == SLAP_CTRL_SEARCH &&
 593                                         sc->sc_mask & SLAP_CTRL_FRONTEND_SEARCH )
 594                                 {
 595                                         /* kludge to disable backend_control() check */
 596                                         c->ldctl_iscritical = 0;
 597                                 }
 598
 599                         } else if( c->ldctl_iscritical ) {
 600                                 /* unavailable CRITICAL control */
 601                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 602                                 rs->sr_text = "critical extension is unavailable";
 603                                 goto return_results;
 604                         }
 605
 606                 } else if( c->ldctl_iscritical ) {
 607                         /* unrecognized CRITICAL control */
 608                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 609                         rs->sr_text = "critical extension is not recognized";
 610                         goto return_results;
 611                 }
 612 next_ctrl:;
 613         }
 614
 615 return_results:
 616         Debug( LDAP_DEBUG_TRACE,
 617                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 618                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 619
 620         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 621                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 622                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 623                         send_ldap_disconnect( op, rs );
 624                         rs->sr_err = SLAPD_DISCONNECT;
 625                 } else {
 626                         send_ldap_result( op, rs );
 627                 }
 628         }
 629
 630         return rs->sr_err;
 631 }
 632
 633 static int parseModifyIncrement (
 634         Operation *op,
 635         SlapReply *rs,
 636         LDAPControl *ctrl )
 637 {
 638 #if 0
 639         if ( op->o_modifyIncrement != SLAP_NO_CONTROL ) {
 640                 rs->sr_text = "modifyIncrement control specified multiple times";
 641                 return LDAP_PROTOCOL_ERROR;
 642         }
 643 #endif
 644
 645         if ( ctrl->ldctl_value.bv_len ) {
 646                 rs->sr_text = "modifyIncrement control value not empty";
 647                 return LDAP_PROTOCOL_ERROR;
 648         }
 649
 650 #if 0
 651         op->o_modifyIncrement = ctrl->ldctl_iscritical
 652                 ? SLAP_CRITICAL_CONTROL
 653                 : SLAP_NONCRITICAL_CONTROL;
 654 #endif
 655
 656         return LDAP_SUCCESS;
 657 }
 658
 659 static int parseManageDSAit (
 660         Operation *op,
 661         SlapReply *rs,
 662         LDAPControl *ctrl )
 663 {
 664         if ( op->o_managedsait != SLAP_NO_CONTROL ) {
 665                 rs->sr_text = "manageDSAit control specified multiple times";
 666                 return LDAP_PROTOCOL_ERROR;
 667         }
 668
 669         if ( ctrl->ldctl_value.bv_len ) {
 670                 rs->sr_text = "manageDSAit control value not empty";
 671                 return LDAP_PROTOCOL_ERROR;
 672         }
 673
 674         op->o_managedsait = ctrl->ldctl_iscritical
 675                 ? SLAP_CRITICAL_CONTROL
 676                 : SLAP_NONCRITICAL_CONTROL;
 677
 678         return LDAP_SUCCESS;
 679 }
 680
 681 static int parseProxyAuthz (
 682         Operation *op,
 683         SlapReply *rs,
 684         LDAPControl *ctrl )
 685 {
 686         int             rc;
 687         struct berval   dn = BER_BVNULL;
 688
 689         if ( op->o_proxy_authz != SLAP_NO_CONTROL ) {
 690                 rs->sr_text = "proxy authorization control specified multiple times";
 691                 return LDAP_PROTOCOL_ERROR;
 692         }
 693
 694         op->o_proxy_authz = ctrl->ldctl_iscritical
 695                 ? SLAP_CRITICAL_CONTROL
 696                 : SLAP_NONCRITICAL_CONTROL;
 697
 698         Debug( LDAP_DEBUG_ARGS,
 699                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 700                 op->o_connid,
 701                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 702                 0 );
 703
 704         if( ctrl->ldctl_value.bv_len == 0 ) {
 705                 Debug( LDAP_DEBUG_TRACE,
 706                         "parseProxyAuthz: conn=%lu anonymous\n",
 707                         op->o_connid, 0, 0 );
 708
 709                 /* anonymous */
 710                 free( op->o_dn.bv_val );
 711                 op->o_dn.bv_len = 0;
 712                 op->o_dn.bv_val = ch_strdup( "" );
 713
 714                 free( op->o_ndn.bv_val );
 715                 op->o_ndn.bv_len = 0;
 716                 op->o_ndn.bv_val = ch_strdup( "" );
 717
 718                 return LDAP_SUCCESS;
 719         }
 720
 721         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 722                         NULL, &dn, SLAP_GETDN_AUTHZID );
 723
 724         /* FIXME: empty DN in proxyAuthz control should be legal... */
 725         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 726                 if ( dn.bv_val ) {
 727                         ch_free( dn.bv_val );
 728                 }
 729                 rs->sr_text = "authzId mapping failed";
 730                 return LDAP_PROXY_AUTHZ_FAILURE;
 731         }
 732
 733         Debug( LDAP_DEBUG_TRACE,
 734                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 735                 op->o_connid,
 736                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 737
 738         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 739
 740         if( rc ) {
 741                 ch_free( dn.bv_val );
 742                 rs->sr_text = "not authorized to assume identity";
 743                 return LDAP_PROXY_AUTHZ_FAILURE;
 744         }
 745
 746         ch_free( op->o_dn.bv_val );
 747         ch_free( op->o_ndn.bv_val );
 748
 749         op->o_dn.bv_val = NULL;
 750         op->o_ndn = dn;
 751
 752         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 753             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 754
 755         /*
 756          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 757          * from now on op->o_dn is normalized
 758          */
 759         ber_dupbv( &op->o_dn, &dn );
 760
 761         return LDAP_SUCCESS;
 762 }
 763
 764 static int parseNoOp (
 765         Operation *op,
 766         SlapReply *rs,
 767         LDAPControl *ctrl )
 768 {
 769         if ( op->o_noop != SLAP_NO_CONTROL ) {
 770                 rs->sr_text = "noop control specified multiple times";
 771                 return LDAP_PROTOCOL_ERROR;
 772         }
 773
 774         if ( ctrl->ldctl_value.bv_len ) {
 775                 rs->sr_text = "noop control value not empty";
 776                 return LDAP_PROTOCOL_ERROR;
 777         }
 778
 779         op->o_noop = ctrl->ldctl_iscritical
 780                 ? SLAP_CRITICAL_CONTROL
 781                 : SLAP_NONCRITICAL_CONTROL;
 782
 783         return LDAP_SUCCESS;
 784 }
 785
 786 static int parsePagedResults (
 787         Operation *op,
 788         SlapReply *rs,
 789         LDAPControl *ctrl )
 790 {
 791         int             rc = LDAP_SUCCESS;
 792         ber_tag_t       tag;
 793         ber_int_t       size;
 794         BerElement      *ber;
 795         struct berval   cookie = BER_BVNULL;
 796
 797         if ( op->o_pagedresults != SLAP_NO_CONTROL ) {
 798                 rs->sr_text = "paged results control specified multiple times";
 799                 return LDAP_PROTOCOL_ERROR;
 800         }
 801
 802         if ( op->o_sync != SLAP_NO_CONTROL ) {
 803                 rs->sr_text = "paged results control specified with sync control";
 804                 return LDAP_PROTOCOL_ERROR;
 805         }
 806
 807         if ( ctrl->ldctl_value.bv_len == 0 ) {
 808                 rs->sr_text = "paged results control value is empty (or absent)";
 809                 return LDAP_PROTOCOL_ERROR;
 810         }
 811
 812         /* Parse the control value
 813          *      realSearchControlValue ::= SEQUENCE {
 814          *              size    INTEGER (0..maxInt),
 815          *                              -- requested page size from client
 816          *                              -- result set size estimate from server
 817          *              cookie  OCTET STRING
 818          * }
 819          */
 820         ber = ber_init( &ctrl->ldctl_value );
 821         if ( ber == NULL ) {
 822                 rs->sr_text = "internal error";
 823                 return LDAP_OTHER;
 824         }
 825
 826         tag = ber_scanf( ber, "{im}", &size, &cookie );
 827
 828         if ( tag == LBER_ERROR ) {
 829                 rs->sr_text = "paged results control could not be decoded";
 830                 rc = LDAP_PROTOCOL_ERROR;
 831                 goto done;
 832         }
 833
 834         if ( size < 0 ) {
 835                 rs->sr_text = "paged results control size invalid";
 836                 rc = LDAP_PROTOCOL_ERROR;
 837                 goto done;
 838         }
 839
 840 #if 0
 841         /* defer cookie decoding/checks to backend... */
 842         if ( cookie.bv_len ) {
 843                 PagedResultsCookie reqcookie;
 844                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 845                         /* bad cookie */
 846                         rs->sr_text = "paged results cookie is invalid";
 847                         rc = LDAP_PROTOCOL_ERROR;
 848                         goto done;
 849                 }
 850
 851                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 852
 853                 if ( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 854                         /* bad cookie */
 855                         rs->sr_text = "paged results cookie is invalid";
 856                         rc = LDAP_PROTOCOL_ERROR;
 857                         goto done;
 858
 859                 } else if ( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 860                         rs->sr_text = "paged results cookie is invalid or old";
 861                         rc = LDAP_UNWILLING_TO_PERFORM;
 862                         goto done;
 863                 }
 864
 865         } else {
 866                 /* Initial request.  Initialize state. */
 867 #if 0
 868                 if ( op->o_conn->c_pagedresults_state.ps_cookie != 0 ) {
 869                         /* There's another pagedResults control on the
 870                          * same connection; reject new pagedResults controls
 871                          * (allowed by RFC2696) */
 872                         rs->sr_text = "paged results cookie unavailable; try later";
 873                         rc = LDAP_UNWILLING_TO_PERFORM;
 874                         goto done;
 875                 }
 876 #endif
 877                 op->o_pagedresults_state.ps_cookie = 0;
 878                 op->o_pagedresults_state.ps_count = 0;
 879         }
 880 #endif
 881
 882         op->o_pagedresults_size = size;
 883
 884         /* NOTE: according to RFC 2696 3.:
 885
 886     If the page size is greater than or equal to the sizeLimit value, the
 887     server should ignore the control as the request can be satisfied in a
 888     single page.
 889
 890          * NOTE: this assumes that the op->ors_slimit be set
 891          * before the controls are parsed.
 892          */
 893         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
 894                 op->o_pagedresults = SLAP_IGNORED_CONTROL;
 895
 896         } else if ( ctrl->ldctl_iscritical ) {
 897                 op->o_pagedresults = SLAP_CRITICAL_CONTROL;
 898
 899         } else {
 900                 op->o_pagedresults = SLAP_NONCRITICAL_CONTROL;
 901         }
 902
 903 done:;
 904         (void)ber_free( ber, 1 );
 905         return rc;
 906 }
 907
 908 static int parseAssert (
 909         Operation *op,
 910         SlapReply *rs,
 911         LDAPControl *ctrl )
 912 {
 913         BerElement      *ber;
 914         struct berval   fstr = BER_BVNULL;
 915         const char *err_msg = "";
 916
 917         if ( op->o_assert != SLAP_NO_CONTROL ) {
 918                 rs->sr_text = "assert control specified multiple times";
 919                 return LDAP_PROTOCOL_ERROR;
 920         }
 921
 922         if ( ctrl->ldctl_value.bv_len == 0 ) {
 923                 rs->sr_text = "assert control value is empty (or absent)";
 924                 return LDAP_PROTOCOL_ERROR;
 925         }
 926
 927         ber = ber_init( &(ctrl->ldctl_value) );
 928         if (ber == NULL) {
 929                 rs->sr_text = "assert control: internal error";
 930                 return LDAP_OTHER;
 931         }
 932
 933         rs->sr_err = get_filter( op, ber, &(op->o_assertion), &rs->sr_text);
 934
 935         if( rs->sr_err != LDAP_SUCCESS ) {
 936                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 937                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 938                         send_ldap_disconnect( op, rs );
 939                         rs->sr_err = SLAPD_DISCONNECT;
 940                 } else {
 941                         send_ldap_result( op, rs );
 942                 }
 943                 if( op->o_assertion != NULL ) {
 944                         filter_free_x( op, op->o_assertion );
 945                 }
 946                 return rs->sr_err;
 947         }
 948
 949 #ifdef LDAP_DEBUG
 950         filter2bv_x( op, op->o_assertion, &fstr );
 951
 952         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
 953                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
 954         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
 955 #endif
 956
 957         op->o_assert = ctrl->ldctl_iscritical
 958                 ? SLAP_CRITICAL_CONTROL
 959                 : SLAP_NONCRITICAL_CONTROL;
 960
 961         rs->sr_err = LDAP_SUCCESS;
 962         return LDAP_SUCCESS;
 963 }
 964
 965 static int parsePreRead (
 966         Operation *op,
 967         SlapReply *rs,
 968         LDAPControl *ctrl )
 969 {
 970         ber_len_t siz, off, i;
 971         AttributeName *an = NULL;
 972         BerElement      *ber;
 973
 974         if ( op->o_preread != SLAP_NO_CONTROL ) {
 975                 rs->sr_text = "preread control specified multiple times";
 976                 return LDAP_PROTOCOL_ERROR;
 977         }
 978
 979         if ( ctrl->ldctl_value.bv_len == 0 ) {
 980                 rs->sr_text = "preread control value is empty (or absent)";
 981                 return LDAP_PROTOCOL_ERROR;
 982         }
 983
 984         ber = ber_init( &(ctrl->ldctl_value) );
 985         if (ber == NULL) {
 986                 rs->sr_text = "preread control: internal error";
 987                 return LDAP_OTHER;
 988         }
 989
 990         siz = sizeof( AttributeName );
 991         off = offsetof( AttributeName, an_name );
 992         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
 993                 rs->sr_text = "preread control: decoding error";
 994                 return LDAP_PROTOCOL_ERROR;
 995         }
 996
 997         for( i=0; i<siz; i++ ) {
 998                 int             rc = LDAP_SUCCESS;
 999                 const char      *dummy = NULL;
1000
1001                 an[i].an_desc = NULL;
1002                 an[i].an_oc = NULL;
1003                 an[i].an_oc_exclude = 0;
1004                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1005                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1006                         rs->sr_text = dummy ? dummy : "postread control: unknown attributeType";
1007                         return rc;
1008                 }
1009         }
1010
1011         op->o_preread = ctrl->ldctl_iscritical
1012                 ? SLAP_CRITICAL_CONTROL
1013                 : SLAP_NONCRITICAL_CONTROL;
1014
1015         op->o_preread_attrs = an;
1016
1017         rs->sr_err = LDAP_SUCCESS;
1018         return LDAP_SUCCESS;
1019 }
1020
1021 static int parsePostRead (
1022         Operation *op,
1023         SlapReply *rs,
1024         LDAPControl *ctrl )
1025 {
1026         ber_len_t siz, off, i;
1027         AttributeName *an = NULL;
1028         BerElement      *ber;
1029
1030         if ( op->o_postread != SLAP_NO_CONTROL ) {
1031                 rs->sr_text = "postread control specified multiple times";
1032                 return LDAP_PROTOCOL_ERROR;
1033         }
1034
1035         if ( ctrl->ldctl_value.bv_len == 0 ) {
1036                 rs->sr_text = "postread control value is empty (or absent)";
1037                 return LDAP_PROTOCOL_ERROR;
1038         }
1039
1040         ber = ber_init( &(ctrl->ldctl_value) );
1041         if (ber == NULL) {
1042                 rs->sr_text = "postread control: internal error";
1043                 return LDAP_OTHER;
1044         }
1045
1046         siz = sizeof( AttributeName );
1047         off = offsetof( AttributeName, an_name );
1048         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1049                 rs->sr_text = "postread control: decoding error";
1050                 return LDAP_PROTOCOL_ERROR;
1051         }
1052
1053         for( i=0; i<siz; i++ ) {
1054                 int             rc = LDAP_SUCCESS;
1055                 const char      *dummy = NULL;
1056
1057                 an[i].an_desc = NULL;
1058                 an[i].an_oc = NULL;
1059                 an[i].an_oc_exclude = 0;
1060                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1061                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1062                         rs->sr_text = dummy ? dummy : "postread control: unknown attributeType";
1063                         return rc;
1064                 }
1065         }
1066
1067         op->o_postread = ctrl->ldctl_iscritical
1068                 ? SLAP_CRITICAL_CONTROL
1069                 : SLAP_NONCRITICAL_CONTROL;
1070
1071         op->o_postread_attrs = an;
1072
1073         rs->sr_err = LDAP_SUCCESS;
1074         return LDAP_SUCCESS;
1075 }
1076
1077 int parseValuesReturnFilter (
1078         Operation *op,
1079         SlapReply *rs,
1080         LDAPControl *ctrl )
1081 {
1082         BerElement      *ber;
1083         struct berval   fstr = BER_BVNULL;
1084         const char *err_msg = "";
1085
1086         if ( op->o_valuesreturnfilter != SLAP_NO_CONTROL ) {
1087                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1088                 return LDAP_PROTOCOL_ERROR;
1089         }
1090
1091         if ( ctrl->ldctl_value.bv_len == 0 ) {
1092                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1093                 return LDAP_PROTOCOL_ERROR;
1094         }
1095
1096         ber = ber_init( &(ctrl->ldctl_value) );
1097         if (ber == NULL) {
1098                 rs->sr_text = "internal error";
1099                 return LDAP_OTHER;
1100         }
1101
1102         rs->sr_err = get_vrFilter( op, ber, &(op->o_vrFilter), &rs->sr_text);
1103
1104         if( rs->sr_err != LDAP_SUCCESS ) {
1105                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1106                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1107                         send_ldap_disconnect( op, rs );
1108                         rs->sr_err = SLAPD_DISCONNECT;
1109                 } else {
1110                         send_ldap_result( op, rs );
1111                 }
1112                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1113         }
1114 #ifdef LDAP_DEBUG
1115         else {
1116                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1117         }
1118
1119         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1120                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1121         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1122 #endif
1123
1124         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1125                 ? SLAP_CRITICAL_CONTROL
1126                 : SLAP_NONCRITICAL_CONTROL;
1127
1128         rs->sr_err = LDAP_SUCCESS;
1129         return LDAP_SUCCESS;
1130 }
1131
1132 #ifdef LDAP_CONTROL_SUBENTRIES
1133 static int parseSubentries (
1134         Operation *op,
1135         SlapReply *rs,
1136         LDAPControl *ctrl )
1137 {
1138         if ( op->o_subentries != SLAP_NO_CONTROL ) {
1139                 rs->sr_text = "subentries control specified multiple times";
1140                 return LDAP_PROTOCOL_ERROR;
1141         }
1142
1143         /* FIXME: should use BER library */
1144         if( ( ctrl->ldctl_value.bv_len != 3 )
1145                 && ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1146                 && ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1147         {
1148                 rs->sr_text = "subentries control value encoding is bogus";
1149                 return LDAP_PROTOCOL_ERROR;
1150         }
1151
1152         op->o_subentries = ctrl->ldctl_iscritical
1153                 ? SLAP_CRITICAL_CONTROL
1154                 : SLAP_NONCRITICAL_CONTROL;
1155
1156         op->o_subentries_visibility = (ctrl->ldctl_value.bv_val[2] != 0x00);
1157
1158         return LDAP_SUCCESS;
1159 }
1160 #endif
1161
1162 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1163 static int parsePermissiveModify (
1164         Operation *op,
1165         SlapReply *rs,
1166         LDAPControl *ctrl )
1167 {
1168         if ( op->o_permissive_modify != SLAP_NO_CONTROL ) {
1169                 rs->sr_text = "permissiveModify control specified multiple times";
1170                 return LDAP_PROTOCOL_ERROR;
1171         }
1172
1173         if ( ctrl->ldctl_value.bv_len ) {
1174                 rs->sr_text = "permissiveModify control value not empty";
1175                 return LDAP_PROTOCOL_ERROR;
1176         }
1177
1178         op->o_permissive_modify = ctrl->ldctl_iscritical
1179                 ? SLAP_CRITICAL_CONTROL
1180                 : SLAP_NONCRITICAL_CONTROL;
1181
1182         return LDAP_SUCCESS;
1183 }
1184 #endif
1185
1186 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1187 static int parseDomainScope (
1188         Operation *op,
1189         SlapReply *rs,
1190         LDAPControl *ctrl )
1191 {
1192         if ( op->o_domain_scope != SLAP_NO_CONTROL ) {
1193                 rs->sr_text = "domainScope control specified multiple times";
1194                 return LDAP_PROTOCOL_ERROR;
1195         }
1196
1197         if ( ctrl->ldctl_value.bv_len ) {
1198                 rs->sr_text = "domainScope control value not empty";
1199                 return LDAP_PROTOCOL_ERROR;
1200         }
1201
1202         op->o_domain_scope = ctrl->ldctl_iscritical
1203                 ? SLAP_CRITICAL_CONTROL
1204                 : SLAP_NONCRITICAL_CONTROL;
1205
1206         return LDAP_SUCCESS;
1207 }
1208 #endif
1209
1210 #ifdef LDAP_CONTROL_X_TREE_DELETE
1211 static int parseTreeDelete (
1212         Operation *op,
1213         SlapReply *rs,
1214         LDAPControl *ctrl )
1215 {
1216         if ( op->o_tree_delete != SLAP_NO_CONTROL ) {
1217                 rs->sr_text = "treeDelete control specified multiple times";
1218                 return LDAP_PROTOCOL_ERROR;
1219         }
1220
1221         if ( ctrl->ldctl_value.bv_len ) {
1222                 rs->sr_text = "treeDelete control value not empty";
1223                 return LDAP_PROTOCOL_ERROR;
1224         }
1225
1226         op->o_tree_delete = ctrl->ldctl_iscritical
1227                 ? SLAP_CRITICAL_CONTROL
1228                 : SLAP_NONCRITICAL_CONTROL;
1229
1230         return LDAP_SUCCESS;
1231 }
1232 #endif
1233
1234 #ifdef LDAP_CONTORL_X_SEARCH_OPTIONS
1235 static int parseSearchOptions (
1236         Operation *op,
1237         SlapReply *rs,
1238         LDAPControl *ctrl )
1239 {
1240         BerElement *ber;
1241         ber_int_t search_flags;
1242
1243         if ( ctrl->ldctl_value.bv_len == 0 ) {
1244                 rs->sr_text = "searchOptions control value not empty";
1245                 return LDAP_PROTOCOL_ERROR;
1246         }
1247
1248         ber = ber_init( &ctrl->ldctl_value );
1249         if( ber == NULL ) {
1250                 rs->sr_text = "internal error";
1251                 return LDAP_OTHER;
1252         }
1253
1254         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1255                 rs->sr_text = "searchOptions control decoding error";
1256                 return LDAP_PROTOCOL_ERROR;
1257         }
1258
1259         (void) ber_free( ber, 1 );
1260
1261         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1262                 if ( op->o_domain_scope != SLAP_NO_CONTROL ) {
1263                         rs->sr_text = "searchOptions control specified multiple times "
1264                                 "or with domainScope control";
1265                         return LDAP_PROTOCOL_ERROR;
1266                 }
1267
1268                 op->o_domain_scope = ctrl->ldctl_iscritical
1269                         ? SLAP_CRITICAL_CONTROL
1270                         : SLAP_NONCRITICAL_CONTROL;
1271         }
1272
1273         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1274                 /* Other search flags not recognised so far */
1275                 rs->sr_text = "searchOptions contained unrecongized flag";
1276                 return LDAP_UNWILLING_TO_PERFORM;
1277         }
1278
1279         return LDAP_SUCCESS;
1280 }
1281 #endif
1282
1283 static int parseLDAPsync (
1284         Operation *op,
1285         SlapReply *rs,
1286         LDAPControl *ctrl )
1287 {
1288         ber_tag_t tag;
1289         BerElement *ber;
1290         ber_int_t mode;
1291         ber_len_t len;
1292         struct slap_session_entry *se;
1293
1294         if ( op->o_sync != SLAP_NO_CONTROL ) {
1295                 rs->sr_text = "Sync control specified multiple times";
1296                 return LDAP_PROTOCOL_ERROR;
1297         }
1298
1299         if ( op->o_pagedresults != SLAP_NO_CONTROL ) {
1300                 rs->sr_text = "Sync control specified with pagedResults control";
1301                 return LDAP_PROTOCOL_ERROR;
1302         }
1303
1304
1305         if ( ctrl->ldctl_value.bv_len == 0 ) {
1306                 rs->sr_text = "Sync control value is empty (or absent)";
1307                 return LDAP_PROTOCOL_ERROR;
1308         }
1309
1310         /* Parse the control value
1311          *      syncRequestValue ::= SEQUENCE {
1312          *              mode   ENUMERATED {
1313          *                      -- 0 unused
1314          *                      refreshOnly             (1),
1315          *                      -- 2 reserved
1316          *                      refreshAndPersist       (3)
1317          *              },
1318          *              cookie  syncCookie OPTIONAL
1319          *      }
1320          */
1321
1322         ber = ber_init( &ctrl->ldctl_value );
1323         if( ber == NULL ) {
1324                 rs->sr_text = "internal error";
1325                 return LDAP_OTHER;
1326         }
1327
1328         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
1329                 rs->sr_text = "Sync control : mode decoding error";
1330                 return LDAP_PROTOCOL_ERROR;
1331         }
1332
1333         switch( mode ) {
1334         case LDAP_SYNC_REFRESH_ONLY:
1335                 mode = SLAP_SYNC_REFRESH;
1336                 break;
1337         case LDAP_SYNC_REFRESH_AND_PERSIST:
1338                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
1339                 break;
1340         default:
1341                 rs->sr_text = "Sync control : unknown update mode";
1342                 return LDAP_PROTOCOL_ERROR;
1343         }
1344
1345         tag = ber_peek_tag( ber, &len );
1346
1347         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
1348                 struct berval tmp_bv;
1349                 if (( ber_scanf( ber, /*{*/ "o", &tmp_bv )) == LBER_ERROR ) {
1350                         rs->sr_text = "Sync control : cookie decoding error";
1351                         return LDAP_PROTOCOL_ERROR;
1352                 }
1353                 ber_bvarray_add( &op->o_sync_state.octet_str, &tmp_bv );
1354                 slap_parse_sync_cookie( &op->o_sync_state );
1355         }
1356         if ( tag == LDAP_TAG_RELOAD_HINT ) {
1357                 if (( ber_scanf( ber, /*{*/ "b", &op->o_sync_rhint )) == LBER_ERROR ) {
1358                         rs->sr_text = "Sync control : rhint decoding error";
1359                         return LDAP_PROTOCOL_ERROR;
1360                 }
1361         }
1362         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
1363                         rs->sr_text = "Sync control : decoding error";
1364                         return LDAP_PROTOCOL_ERROR;
1365         }
1366
1367         (void) ber_free( ber, 1 );
1368
1369         op->o_sync_mode = (char) mode;
1370
1371         op->o_sync = ctrl->ldctl_iscritical
1372                 ? SLAP_CRITICAL_CONTROL
1373                 : SLAP_NONCRITICAL_CONTROL;
1374
1375         return LDAP_SUCCESS;
1376 }