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 ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 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
 894         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
 895                 op->o_pagedresults = SLAP_IGNORED_CONTROL;
 896
 897         } else if ( ctrl->ldctl_iscritical ) {
 898                 op->o_pagedresults = SLAP_CRITICAL_CONTROL;
 899
 900         } else {
 901                 op->o_pagedresults = SLAP_NONCRITICAL_CONTROL;
 902         }
 903
 904 done:;
 905         (void)ber_free( ber, 1 );
 906         return rc;
 907 }
 908
 909 static int parseAssert (
 910         Operation *op,
 911         SlapReply *rs,
 912         LDAPControl *ctrl )
 913 {
 914         BerElement      *ber;
 915         struct berval   fstr = BER_BVNULL;
 916         const char *err_msg = "";
 917
 918         if ( op->o_assert != SLAP_NO_CONTROL ) {
 919                 rs->sr_text = "assert control specified multiple times";
 920                 return LDAP_PROTOCOL_ERROR;
 921         }
 922
 923         if ( ctrl->ldctl_value.bv_len == 0 ) {
 924                 rs->sr_text = "assert control value is empty (or absent)";
 925                 return LDAP_PROTOCOL_ERROR;
 926         }
 927
 928         ber = ber_init( &(ctrl->ldctl_value) );
 929         if (ber == NULL) {
 930                 rs->sr_text = "assert control: internal error";
 931                 return LDAP_OTHER;
 932         }
 933
 934         rs->sr_err = get_filter( op, ber, &(op->o_assertion), &rs->sr_text);
 935
 936         if( rs->sr_err != LDAP_SUCCESS ) {
 937                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 938                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 939                         send_ldap_disconnect( op, rs );
 940                         rs->sr_err = SLAPD_DISCONNECT;
 941                 } else {
 942                         send_ldap_result( op, rs );
 943                 }
 944                 if( op->o_assertion != NULL ) {
 945                         filter_free_x( op, op->o_assertion );
 946                 }
 947                 return rs->sr_err;
 948         }
 949
 950 #ifdef LDAP_DEBUG
 951         filter2bv_x( op, op->o_assertion, &fstr );
 952
 953         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
 954                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
 955         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
 956 #endif
 957
 958         op->o_assert = ctrl->ldctl_iscritical
 959                 ? SLAP_CRITICAL_CONTROL
 960                 : SLAP_NONCRITICAL_CONTROL;
 961
 962         rs->sr_err = LDAP_SUCCESS;
 963         return LDAP_SUCCESS;
 964 }
 965
 966 static int parsePreRead (
 967         Operation *op,
 968         SlapReply *rs,
 969         LDAPControl *ctrl )
 970 {
 971         ber_len_t siz, off, i;
 972         AttributeName *an = NULL;
 973         BerElement      *ber;
 974
 975         if ( op->o_preread != SLAP_NO_CONTROL ) {
 976                 rs->sr_text = "preread control specified multiple times";
 977                 return LDAP_PROTOCOL_ERROR;
 978         }
 979
 980         if ( ctrl->ldctl_value.bv_len == 0 ) {
 981                 rs->sr_text = "preread control value is empty (or absent)";
 982                 return LDAP_PROTOCOL_ERROR;
 983         }
 984
 985         ber = ber_init( &(ctrl->ldctl_value) );
 986         if (ber == NULL) {
 987                 rs->sr_text = "preread control: internal error";
 988                 return LDAP_OTHER;
 989         }
 990
 991         siz = sizeof( AttributeName );
 992         off = offsetof( AttributeName, an_name );
 993         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
 994                 rs->sr_text = "preread control: decoding error";
 995                 return LDAP_PROTOCOL_ERROR;
 996         }
 997
 998         for( i=0; i<siz; i++ ) {
 999                 int             rc = LDAP_SUCCESS;
1000                 const char      *dummy = NULL;
1001
1002                 an[i].an_desc = NULL;
1003                 an[i].an_oc = NULL;
1004                 an[i].an_oc_exclude = 0;
1005                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1006                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1007                         rs->sr_text = dummy ? dummy : "postread control: unknown attributeType";
1008                         return rc;
1009                 }
1010         }
1011
1012         op->o_preread = ctrl->ldctl_iscritical
1013                 ? SLAP_CRITICAL_CONTROL
1014                 : SLAP_NONCRITICAL_CONTROL;
1015
1016         op->o_preread_attrs = an;
1017
1018         rs->sr_err = LDAP_SUCCESS;
1019         return LDAP_SUCCESS;
1020 }
1021
1022 static int parsePostRead (
1023         Operation *op,
1024         SlapReply *rs,
1025         LDAPControl *ctrl )
1026 {
1027         ber_len_t siz, off, i;
1028         AttributeName *an = NULL;
1029         BerElement      *ber;
1030
1031         if ( op->o_postread != SLAP_NO_CONTROL ) {
1032                 rs->sr_text = "postread control specified multiple times";
1033                 return LDAP_PROTOCOL_ERROR;
1034         }
1035
1036         if ( ctrl->ldctl_value.bv_len == 0 ) {
1037                 rs->sr_text = "postread control value is empty (or absent)";
1038                 return LDAP_PROTOCOL_ERROR;
1039         }
1040
1041         ber = ber_init( &(ctrl->ldctl_value) );
1042         if (ber == NULL) {
1043                 rs->sr_text = "postread control: internal error";
1044                 return LDAP_OTHER;
1045         }
1046
1047         siz = sizeof( AttributeName );
1048         off = offsetof( AttributeName, an_name );
1049         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1050                 rs->sr_text = "postread control: decoding error";
1051                 return LDAP_PROTOCOL_ERROR;
1052         }
1053
1054         for( i=0; i<siz; i++ ) {
1055                 int             rc = LDAP_SUCCESS;
1056                 const char      *dummy = NULL;
1057
1058                 an[i].an_desc = NULL;
1059                 an[i].an_oc = NULL;
1060                 an[i].an_oc_exclude = 0;
1061                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1062                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1063                         rs->sr_text = dummy ? dummy : "postread control: unknown attributeType";
1064                         return rc;
1065                 }
1066         }
1067
1068         op->o_postread = ctrl->ldctl_iscritical
1069                 ? SLAP_CRITICAL_CONTROL
1070                 : SLAP_NONCRITICAL_CONTROL;
1071
1072         op->o_postread_attrs = an;
1073
1074         rs->sr_err = LDAP_SUCCESS;
1075         return LDAP_SUCCESS;
1076 }
1077
1078 int parseValuesReturnFilter (
1079         Operation *op,
1080         SlapReply *rs,
1081         LDAPControl *ctrl )
1082 {
1083         BerElement      *ber;
1084         struct berval   fstr = BER_BVNULL;
1085         const char *err_msg = "";
1086
1087         if ( op->o_valuesreturnfilter != SLAP_NO_CONTROL ) {
1088                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1089                 return LDAP_PROTOCOL_ERROR;
1090         }
1091
1092         if ( ctrl->ldctl_value.bv_len == 0 ) {
1093                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1094                 return LDAP_PROTOCOL_ERROR;
1095         }
1096
1097         ber = ber_init( &(ctrl->ldctl_value) );
1098         if (ber == NULL) {
1099                 rs->sr_text = "internal error";
1100                 return LDAP_OTHER;
1101         }
1102
1103         rs->sr_err = get_vrFilter( op, ber, &(op->o_vrFilter), &rs->sr_text);
1104
1105         if( rs->sr_err != LDAP_SUCCESS ) {
1106                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1107                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1108                         send_ldap_disconnect( op, rs );
1109                         rs->sr_err = SLAPD_DISCONNECT;
1110                 } else {
1111                         send_ldap_result( op, rs );
1112                 }
1113                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1114         }
1115 #ifdef LDAP_DEBUG
1116         else {
1117                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1118         }
1119
1120         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1121                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1122         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1123 #endif
1124
1125         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1126                 ? SLAP_CRITICAL_CONTROL
1127                 : SLAP_NONCRITICAL_CONTROL;
1128
1129         rs->sr_err = LDAP_SUCCESS;
1130         return LDAP_SUCCESS;
1131 }
1132
1133 #ifdef LDAP_CONTROL_SUBENTRIES
1134 static int parseSubentries (
1135         Operation *op,
1136         SlapReply *rs,
1137         LDAPControl *ctrl )
1138 {
1139         if ( op->o_subentries != SLAP_NO_CONTROL ) {
1140                 rs->sr_text = "subentries control specified multiple times";
1141                 return LDAP_PROTOCOL_ERROR;
1142         }
1143
1144         /* FIXME: should use BER library */
1145         if( ( ctrl->ldctl_value.bv_len != 3 )
1146                 && ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1147                 && ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1148         {
1149                 rs->sr_text = "subentries control value encoding is bogus";
1150                 return LDAP_PROTOCOL_ERROR;
1151         }
1152
1153         op->o_subentries = ctrl->ldctl_iscritical
1154                 ? SLAP_CRITICAL_CONTROL
1155                 : SLAP_NONCRITICAL_CONTROL;
1156
1157         op->o_subentries_visibility = (ctrl->ldctl_value.bv_val[2] != 0x00);
1158
1159         return LDAP_SUCCESS;
1160 }
1161 #endif
1162
1163 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1164 static int parsePermissiveModify (
1165         Operation *op,
1166         SlapReply *rs,
1167         LDAPControl *ctrl )
1168 {
1169         if ( op->o_permissive_modify != SLAP_NO_CONTROL ) {
1170                 rs->sr_text = "permissiveModify control specified multiple times";
1171                 return LDAP_PROTOCOL_ERROR;
1172         }
1173
1174         if ( ctrl->ldctl_value.bv_len ) {
1175                 rs->sr_text = "permissiveModify control value not empty";
1176                 return LDAP_PROTOCOL_ERROR;
1177         }
1178
1179         op->o_permissive_modify = ctrl->ldctl_iscritical
1180                 ? SLAP_CRITICAL_CONTROL
1181                 : SLAP_NONCRITICAL_CONTROL;
1182
1183         return LDAP_SUCCESS;
1184 }
1185 #endif
1186
1187 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1188 static int parseDomainScope (
1189         Operation *op,
1190         SlapReply *rs,
1191         LDAPControl *ctrl )
1192 {
1193         if ( op->o_domain_scope != SLAP_NO_CONTROL ) {
1194                 rs->sr_text = "domainScope control specified multiple times";
1195                 return LDAP_PROTOCOL_ERROR;
1196         }
1197
1198         if ( ctrl->ldctl_value.bv_len ) {
1199                 rs->sr_text = "domainScope control value not empty";
1200                 return LDAP_PROTOCOL_ERROR;
1201         }
1202
1203         op->o_domain_scope = ctrl->ldctl_iscritical
1204                 ? SLAP_CRITICAL_CONTROL
1205                 : SLAP_NONCRITICAL_CONTROL;
1206
1207         return LDAP_SUCCESS;
1208 }
1209 #endif
1210
1211 #ifdef LDAP_CONTROL_X_TREE_DELETE
1212 static int parseTreeDelete (
1213         Operation *op,
1214         SlapReply *rs,
1215         LDAPControl *ctrl )
1216 {
1217         if ( op->o_tree_delete != SLAP_NO_CONTROL ) {
1218                 rs->sr_text = "treeDelete control specified multiple times";
1219                 return LDAP_PROTOCOL_ERROR;
1220         }
1221
1222         if ( ctrl->ldctl_value.bv_len ) {
1223                 rs->sr_text = "treeDelete control value not empty";
1224                 return LDAP_PROTOCOL_ERROR;
1225         }
1226
1227         op->o_tree_delete = ctrl->ldctl_iscritical
1228                 ? SLAP_CRITICAL_CONTROL
1229                 : SLAP_NONCRITICAL_CONTROL;
1230
1231         return LDAP_SUCCESS;
1232 }
1233 #endif
1234
1235 #ifdef LDAP_CONTORL_X_SEARCH_OPTIONS
1236 static int parseSearchOptions (
1237         Operation *op,
1238         SlapReply *rs,
1239         LDAPControl *ctrl )
1240 {
1241         BerElement *ber;
1242         ber_int_t search_flags;
1243
1244         if ( ctrl->ldctl_value.bv_len == 0 ) {
1245                 rs->sr_text = "searchOptions control value not empty";
1246                 return LDAP_PROTOCOL_ERROR;
1247         }
1248
1249         ber = ber_init( &ctrl->ldctl_value );
1250         if( ber == NULL ) {
1251                 rs->sr_text = "internal error";
1252                 return LDAP_OTHER;
1253         }
1254
1255         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1256                 rs->sr_text = "searchOptions control decoding error";
1257                 return LDAP_PROTOCOL_ERROR;
1258         }
1259
1260         (void) ber_free( ber, 1 );
1261
1262         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1263                 if ( op->o_domain_scope != SLAP_NO_CONTROL ) {
1264                         rs->sr_text = "searchOptions control specified multiple times "
1265                                 "or with domainScope control";
1266                         return LDAP_PROTOCOL_ERROR;
1267                 }
1268
1269                 op->o_domain_scope = ctrl->ldctl_iscritical
1270                         ? SLAP_CRITICAL_CONTROL
1271                         : SLAP_NONCRITICAL_CONTROL;
1272         }
1273
1274         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1275                 /* Other search flags not recognised so far */
1276                 rs->sr_text = "searchOptions contained unrecongized flag";
1277                 return LDAP_UNWILLING_TO_PERFORM;
1278         }
1279
1280         return LDAP_SUCCESS;
1281 }
1282 #endif
1283
1284 static int parseLDAPsync (
1285         Operation *op,
1286         SlapReply *rs,
1287         LDAPControl *ctrl )
1288 {
1289         ber_tag_t tag;
1290         BerElement *ber;
1291         ber_int_t mode;
1292         ber_len_t len;
1293         struct slap_session_entry *se;
1294
1295         if ( op->o_sync != SLAP_NO_CONTROL ) {
1296                 rs->sr_text = "Sync control specified multiple times";
1297                 return LDAP_PROTOCOL_ERROR;
1298         }
1299
1300         if ( op->o_pagedresults != SLAP_NO_CONTROL ) {
1301                 rs->sr_text = "Sync control specified with pagedResults control";
1302                 return LDAP_PROTOCOL_ERROR;
1303         }
1304
1305
1306         if ( ctrl->ldctl_value.bv_len == 0 ) {
1307                 rs->sr_text = "Sync control value is empty (or absent)";
1308                 return LDAP_PROTOCOL_ERROR;
1309         }
1310
1311         /* Parse the control value
1312          *      syncRequestValue ::= SEQUENCE {
1313          *              mode   ENUMERATED {
1314          *                      -- 0 unused
1315          *                      refreshOnly             (1),
1316          *                      -- 2 reserved
1317          *                      refreshAndPersist       (3)
1318          *              },
1319          *              cookie  syncCookie OPTIONAL
1320          *      }
1321          */
1322
1323         ber = ber_init( &ctrl->ldctl_value );
1324         if( ber == NULL ) {
1325                 rs->sr_text = "internal error";
1326                 return LDAP_OTHER;
1327         }
1328
1329         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
1330                 rs->sr_text = "Sync control : mode decoding error";
1331                 return LDAP_PROTOCOL_ERROR;
1332         }
1333
1334         switch( mode ) {
1335         case LDAP_SYNC_REFRESH_ONLY:
1336                 mode = SLAP_SYNC_REFRESH;
1337                 break;
1338         case LDAP_SYNC_REFRESH_AND_PERSIST:
1339                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
1340                 break;
1341         default:
1342                 rs->sr_text = "Sync control : unknown update mode";
1343                 return LDAP_PROTOCOL_ERROR;
1344         }
1345
1346         tag = ber_peek_tag( ber, &len );
1347
1348         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
1349                 struct berval tmp_bv;
1350                 if (( ber_scanf( ber, /*{*/ "o", &tmp_bv )) == LBER_ERROR ) {
1351                         rs->sr_text = "Sync control : cookie decoding error";
1352                         return LDAP_PROTOCOL_ERROR;
1353                 }
1354                 ber_bvarray_add( &op->o_sync_state.octet_str, &tmp_bv );
1355                 slap_parse_sync_cookie( &op->o_sync_state );
1356         }
1357         if ( tag == LDAP_TAG_RELOAD_HINT ) {
1358                 if (( ber_scanf( ber, /*{*/ "b", &op->o_sync_rhint )) == LBER_ERROR ) {
1359                         rs->sr_text = "Sync control : rhint decoding error";
1360                         return LDAP_PROTOCOL_ERROR;
1361                 }
1362         }
1363         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
1364                         rs->sr_text = "Sync control : decoding error";
1365                         return LDAP_PROTOCOL_ERROR;
1366         }
1367
1368         (void) ber_free( ber, 1 );
1369
1370         op->o_sync_mode = (char) mode;
1371
1372         op->o_sync = ctrl->ldctl_iscritical
1373                 ? SLAP_CRITICAL_CONTROL
1374                 : SLAP_NONCRITICAL_CONTROL;
1375
1376         return LDAP_SUCCESS;
1377 }