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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1999-2003 The OpenLDAP Foundation.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms are permitted only
   7  * as authorized by the OpenLDAP Public License.  A copy of this
   8  * license is available at http://www.OpenLDAP.org/license.html or
   9  * in file LICENSE in the top-level directory of the distribution.
  10  */
  11 #include "portable.h"
  12
  13 #include <stdio.h>
  14
  15 #include <ac/string.h>
  16 #include <ac/socket.h>
  17
  18 #include "slap.h"
  19
  20 #include "../../libraries/liblber/lber-int.h"
  21
  22 static SLAP_CTRL_PARSE_FN parseAssert;
  23 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  24 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  25 static SLAP_CTRL_PARSE_FN parseNoOp;
  26 static SLAP_CTRL_PARSE_FN parsePagedResults;
  27 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  28 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  29 static SLAP_CTRL_PARSE_FN parseDomainScope;
  30
  31 #ifdef LDAP_CONTROL_SUBENTRIES
  32 static SLAP_CTRL_PARSE_FN parseSubentries;
  33 #endif
  34 #ifdef LDAP_CLIENT_UPDATE
  35 static SLAP_CTRL_PARSE_FN parseClientUpdate;
  36 #endif
  37 #ifdef LDAP_SYNC
  38 static SLAP_CTRL_PARSE_FN parseLdupSync;
  39 #endif
  40
  41 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  42
  43 struct slap_control {
  44         /* Control OID */
  45         char *sc_oid;
  46
  47         /* Operations supported by control */
  48         slap_mask_t sc_mask;
  49
  50         /* Extended operations supported by control */
  51         char **sc_extendedops;
  52
  53         /* Control parsing callback */
  54         SLAP_CTRL_PARSE_FN *sc_parse;
  55
  56         LDAP_SLIST_ENTRY(slap_control) sc_next;
  57 };
  58
  59 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  60         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  61
  62 /*
  63  * all known request control OIDs should be added to this list
  64  */
  65 char **slap_known_controls = NULL;
  66
  67 static char *proxy_authz_extops[] = {
  68         LDAP_EXOP_MODIFY_PASSWD,
  69         LDAP_EXOP_X_WHO_AM_I,
  70         NULL
  71 };
  72
  73 static struct slap_control control_defs[] = {
  74         { LDAP_CONTROL_ASSERT,
  75                 SLAP_CTRL_ACCESS, NULL,
  76                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  77         { LDAP_CONTROL_VALUESRETURNFILTER,
  78                 SLAP_CTRL_SEARCH, NULL,
  79                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  80 #ifdef LDAP_CONTROL_PAGEDRESULTS
  81         { LDAP_CONTROL_PAGEDRESULTS,
  82                 SLAP_CTRL_SEARCH, NULL,
  83                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  84 #endif
  85 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
  86         { LDAP_CONTROL_X_DOMAIN_SCOPE,
  87                 SLAP_CTRL_FRONTEND|SLAP_CTRL_SEARCH, NULL,
  88                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  89 #endif
  90 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
  91         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
  92                 SLAP_CTRL_MODIFY, NULL,
  93                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  94 #endif
  95 #ifdef LDAP_CONTROL_SUBENTRIES
  96         { LDAP_CONTROL_SUBENTRIES,
  97                 SLAP_CTRL_SEARCH, NULL,
  98                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
  99 #endif
 100         { LDAP_CONTROL_NOOP,
 101                 SLAP_CTRL_ACCESS, NULL,
 102                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 103 #ifdef LDAP_CLIENT_UPDATE
 104         { LDAP_CONTROL_CLIENT_UPDATE,
 105                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
 106                 parseClientUpdate, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 107 #endif
 108 #ifdef LDAP_SYNC
 109         { LDAP_CONTROL_SYNC,
 110                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
 111                 parseLdupSync, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 112 #endif
 113         { LDAP_CONTROL_MANAGEDSAIT,
 114                 SLAP_CTRL_ACCESS, NULL,
 115                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 116         { LDAP_CONTROL_PROXY_AUTHZ,
 117                 SLAP_CTRL_FRONTEND|SLAP_CTRL_ACCESS, proxy_authz_extops,
 118                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 119         { NULL, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 120 };
 121
 122 /*
 123  * Register a supported control.
 124  *
 125  * This can be called by an OpenLDAP plugin or, indirectly, by a
 126  * SLAPI plugin calling slapi_register_supported_control().
 127  */
 128 int
 129 register_supported_control(const char *controloid,
 130         slap_mask_t controlmask,
 131         char **controlexops,
 132         SLAP_CTRL_PARSE_FN *controlparsefn)
 133 {
 134         struct slap_control *sc;
 135         int i;
 136
 137         if ( controloid == NULL ) {
 138                 return LDAP_PARAM_ERROR;
 139         }
 140
 141         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 142         if ( sc == NULL ) {
 143                 return LDAP_NO_MEMORY;
 144         }
 145         sc->sc_oid = ch_strdup( controloid );
 146         sc->sc_mask = controlmask;
 147         if ( controlexops != NULL ) {
 148                 sc->sc_extendedops = ldap_charray_dup( controlexops );
 149                 if ( sc->sc_extendedops == NULL ) {
 150                         ch_free( sc );
 151                         return LDAP_NO_MEMORY;
 152                 }
 153         } else {
 154                 sc->sc_extendedops = NULL;
 155         }
 156         sc->sc_parse = controlparsefn;
 157
 158         /* Update slap_known_controls, too. */
 159         if ( slap_known_controls == NULL ) {
 160                 slap_known_controls = (char **)SLAP_MALLOC( 2 * sizeof(char *) );
 161                 if ( slap_known_controls == NULL ) {
 162                         if ( sc->sc_extendedops != NULL ) ldap_charray_free( sc->sc_extendedops );
 163                         ch_free( sc );
 164                         return LDAP_NO_MEMORY;
 165                 }
 166                 slap_known_controls[0] = ch_strdup( sc->sc_oid );
 167                 slap_known_controls[1] = NULL;
 168         } else {
 169                 for ( i = 0; slap_known_controls[i] != NULL; i++ )
 170                         ;
 171                 slap_known_controls = (char **)SLAP_REALLOC( slap_known_controls, (i + 2) * sizeof(char *) );
 172                 if ( slap_known_controls == NULL ) {
 173                         if ( sc->sc_extendedops != NULL ) ldap_charray_free( sc->sc_extendedops );
 174                         ch_free( sc );
 175                         return LDAP_NO_MEMORY;
 176                 }
 177                 slap_known_controls[i++] = ch_strdup( sc->sc_oid );
 178                 slap_known_controls[i] = NULL;
 179         }
 180
 181         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 182         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 183
 184         return LDAP_SUCCESS;
 185 }
 186
 187 /*
 188  * One-time initialization of internal controls.
 189  */
 190 int
 191 slap_controls_init( void )
 192 {
 193         int i, rc;
 194         struct slap_control *sc;
 195
 196         rc = LDAP_SUCCESS;
 197
 198         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 199                 rc = register_supported_control( control_defs[i].sc_oid,
 200                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 201                         control_defs[i].sc_parse );
 202                 if ( rc != LDAP_SUCCESS )
 203                         break;
 204         }
 205
 206         return rc;
 207 }
 208
 209 /*
 210  * Free memory associated with list of supported controls.
 211  */
 212 void
 213 controls_destroy( void )
 214 {
 215         struct slap_control *sc;
 216
 217         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 218                 sc = LDAP_SLIST_FIRST(&controls_list);
 219                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 220
 221                 ch_free( sc->sc_oid );
 222                 if ( sc->sc_extendedops != NULL ) {
 223                         ldap_charray_free( sc->sc_extendedops );
 224                 }
 225                 ch_free( sc );
 226         }
 227         ldap_charray_free( slap_known_controls );
 228 }
 229
 230 /*
 231  * Format the supportedControl attribute of the root DSE,
 232  * detailing which controls are supported by the directory
 233  * server.
 234  */
 235 int
 236 controls_root_dse_info( Entry *e )
 237 {
 238         AttributeDescription *ad_supportedControl
 239                 = slap_schema.si_ad_supportedControl;
 240         struct berval vals[2];
 241         struct slap_control *sc;
 242
 243         vals[1].bv_val = NULL;
 244         vals[1].bv_len = 0;
 245
 246         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 247                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 248
 249                 vals[0].bv_val = sc->sc_oid;
 250                 vals[0].bv_len = strlen( sc->sc_oid );
 251
 252                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 253                         return -1;
 254                 }
 255         }
 256
 257         return 0;
 258 }
 259
 260 /*
 261  * Return a list of OIDs and operation masks for supported
 262  * controls. Used by SLAPI.
 263  */
 264 int
 265 get_supported_controls(char ***ctrloidsp,
 266         slap_mask_t **ctrlmasks)
 267 {
 268         int i, n;
 269         char **oids;
 270         slap_mask_t *masks;
 271         int rc;
 272         struct slap_control *sc;
 273
 274         n = 0;
 275
 276         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 277                 n++;
 278         }
 279
 280         if ( n == 0 ) {
 281                 *ctrloidsp = NULL;
 282                 *ctrlmasks = NULL;
 283                 return LDAP_SUCCESS;
 284         }
 285
 286         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 287         if ( oids == NULL ) {
 288                 return LDAP_NO_MEMORY;
 289         }
 290         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 291         if  ( masks == NULL ) {
 292                 ch_free( oids );
 293                 return LDAP_NO_MEMORY;
 294         }
 295
 296         n = 0;
 297
 298         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 299                 oids[n] = ch_strdup( sc->sc_oid );
 300                 masks[n] = sc->sc_mask;
 301                 n++;
 302         }
 303         oids[n] = NULL;
 304         masks[n] = 0;
 305
 306         *ctrloidsp = oids;
 307         *ctrlmasks = masks;
 308
 309         return LDAP_SUCCESS;
 310 }
 311
 312 /*
 313  * Find a control given its OID.
 314  */
 315 static struct slap_control *
 316 find_ctrl( const char *oid )
 317 {
 318         struct slap_control *sc;
 319
 320         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 321                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 322                         return sc;
 323                 }
 324         }
 325
 326         return NULL;
 327 }
 328
 329 void slap_free_ctrls(
 330         Operation *op,
 331         LDAPControl **ctrls
 332 )
 333 {
 334         int i;
 335
 336         for (i=0; ctrls[i]; i++) {
 337                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 338         }
 339         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 340 }
 341
 342 int get_ctrls(
 343         Operation *op,
 344         SlapReply *rs,
 345         int sendres )
 346 {
 347         int nctrls = 0;
 348         ber_tag_t tag;
 349         ber_len_t len;
 350         char *opaque;
 351         BerElement *ber = op->o_ber;
 352         struct slap_control *sc;
 353         struct berval bv;
 354
 355         len = ber_pvt_ber_remaining(ber);
 356
 357         if( len == 0) {
 358                 /* no controls */
 359                 rs->sr_err = LDAP_SUCCESS;
 360                 return rs->sr_err;
 361         }
 362
 363         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 364                 if( tag == LBER_ERROR ) {
 365                         rs->sr_err = SLAPD_DISCONNECT;
 366                         rs->sr_text = "unexpected data in PDU";
 367                 }
 368
 369                 goto return_results;
 370         }
 371
 372 #ifdef NEW_LOGGING
 373         LDAP_LOG( OPERATION, ENTRY,
 374                 "get_ctrls: conn %lu\n", op->o_connid, 0, 0 );
 375 #else
 376         Debug( LDAP_DEBUG_TRACE,
 377                 "=> get_ctrls\n", 0, 0, 0 );
 378 #endif
 379
 380         if( op->o_protocol < LDAP_VERSION3 ) {
 381                 rs->sr_err = SLAPD_DISCONNECT;
 382                 rs->sr_text = "controls require LDAPv3";
 383                 goto return_results;
 384         }
 385
 386         /* one for first control, one for termination */
 387         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 388
 389 #if 0
 390         if( op->ctrls == NULL ) {
 391                 rs->sr_err = LDAP_NO_MEMORY;
 392                 rs->sr_text = "no memory";
 393                 goto return_results;
 394         }
 395 #endif
 396
 397         op->o_ctrls[nctrls] = NULL;
 398
 399         /* step through each element */
 400         for( tag = ber_first_element( ber, &len, &opaque );
 401                 tag != LBER_ERROR;
 402                 tag = ber_next_element( ber, &len, opaque ) )
 403         {
 404                 LDAPControl *c;
 405                 LDAPControl **tctrls;
 406
 407                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 408                 memset(c, 0, sizeof(LDAPControl));
 409
 410                 /* allocate pointer space for current controls (nctrls)
 411                  * + this control + extra NULL
 412                  */
 413                 tctrls = op->o_tmprealloc( op->o_ctrls,
 414                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 415
 416 #if 0
 417                 if( tctrls == NULL ) {
 418                         ch_free( c );
 419                         ldap_controls_free(op->o_ctrls);
 420                         op->o_ctrls = NULL;
 421
 422                         rs->sr_err = LDAP_NO_MEMORY;
 423                         rs->sr_text = "no memory";
 424                         goto return_results;
 425                 }
 426 #endif
 427                 op->o_ctrls = tctrls;
 428
 429                 op->o_ctrls[nctrls++] = c;
 430                 op->o_ctrls[nctrls] = NULL;
 431
 432                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 433                 c->ldctl_oid = bv.bv_val;
 434
 435                 if( tag == LBER_ERROR ) {
 436 #ifdef NEW_LOGGING
 437                         LDAP_LOG( OPERATION, INFO, "get_ctrls: conn %lu get OID failed.\n",
 438                                 op->o_connid, 0, 0 );
 439 #else
 440                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 441                                 0, 0, 0 );
 442 #endif
 443
 444                         slap_free_ctrls( op, op->o_ctrls );
 445                         op->o_ctrls = NULL;
 446                         rs->sr_err = SLAPD_DISCONNECT;
 447                         rs->sr_text = "decoding controls error";
 448                         goto return_results;
 449
 450                 } else if( c->ldctl_oid == NULL ) {
 451 #ifdef NEW_LOGGING
 452                         LDAP_LOG( OPERATION, INFO,
 453                                 "get_ctrls: conn %lu got emtpy OID.\n",
 454                                 op->o_connid, 0, 0 );
 455 #else
 456                         Debug( LDAP_DEBUG_TRACE,
 457                                 "get_ctrls: conn %lu got emtpy OID.\n",
 458                                 op->o_connid, 0, 0 );
 459 #endif
 460
 461                         slap_free_ctrls( op, op->o_ctrls );
 462                         op->o_ctrls = NULL;
 463                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 464                         rs->sr_text = "OID field is empty";
 465                         goto return_results;
 466                 }
 467
 468                 tag = ber_peek_tag( ber, &len );
 469
 470                 if( tag == LBER_BOOLEAN ) {
 471                         ber_int_t crit;
 472                         tag = ber_scanf( ber, "b", &crit );
 473
 474                         if( tag == LBER_ERROR ) {
 475 #ifdef NEW_LOGGING
 476                                 LDAP_LOG( OPERATION, INFO,
 477                                         "get_ctrls: conn %lu get crit failed.\n",
 478                                         op->o_connid, 0, 0 );
 479 #else
 480                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 481                                         0, 0, 0 );
 482 #endif
 483                                 slap_free_ctrls( op, op->o_ctrls );
 484                                 op->o_ctrls = NULL;
 485                                 rs->sr_err = SLAPD_DISCONNECT;
 486                                 rs->sr_text = "decoding controls error";
 487                                 goto return_results;
 488                         }
 489
 490                         c->ldctl_iscritical = (crit != 0);
 491                         tag = ber_peek_tag( ber, &len );
 492                 }
 493
 494                 if( tag == LBER_OCTETSTRING ) {
 495                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 496
 497                         if( tag == LBER_ERROR ) {
 498 #ifdef NEW_LOGGING
 499                                 LDAP_LOG( OPERATION, INFO, "get_ctrls: conn %lu: "
 500                                         "%s (%scritical): get value failed.\n",
 501                                         op->o_connid, c->ldctl_oid,
 502                                         c->ldctl_iscritical ? "" : "non" );
 503 #else
 504                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 505                                         "%s (%scritical): get value failed.\n",
 506                                         op->o_connid, c->ldctl_oid,
 507                                         c->ldctl_iscritical ? "" : "non" );
 508 #endif
 509                                 slap_free_ctrls( op, op->o_ctrls );
 510                                 op->o_ctrls = NULL;
 511                                 rs->sr_err = SLAPD_DISCONNECT;
 512                                 rs->sr_text = "decoding controls error";
 513                                 goto return_results;
 514                         }
 515                 }
 516
 517 #ifdef NEW_LOGGING
 518                 LDAP_LOG( OPERATION, INFO,
 519                         "get_ctrls: conn %lu oid=\"%s\" (%scritical)\n",
 520                         op->o_connid, c->ldctl_oid, c->ldctl_iscritical ? "" : "non" );
 521 #else
 522                 Debug( LDAP_DEBUG_TRACE,
 523                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 524                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 525 #endif
 526
 527                 sc = find_ctrl( c->ldctl_oid );
 528                 if( sc != NULL ) {
 529                         /* recognized control */
 530                         slap_mask_t tagmask;
 531                         switch( op->o_tag ) {
 532                         case LDAP_REQ_ADD:
 533                                 tagmask = SLAP_CTRL_ADD;
 534                                 break;
 535                         case LDAP_REQ_BIND:
 536                                 tagmask = SLAP_CTRL_BIND;
 537                                 break;
 538                         case LDAP_REQ_COMPARE:
 539                                 tagmask = SLAP_CTRL_COMPARE;
 540                                 break;
 541                         case LDAP_REQ_DELETE:
 542                                 tagmask = SLAP_CTRL_DELETE;
 543                                 break;
 544                         case LDAP_REQ_MODIFY:
 545                                 tagmask = SLAP_CTRL_MODIFY;
 546                                 break;
 547                         case LDAP_REQ_RENAME:
 548                                 tagmask = SLAP_CTRL_RENAME;
 549                                 break;
 550                         case LDAP_REQ_SEARCH:
 551                                 tagmask = SLAP_CTRL_SEARCH;
 552                                 break;
 553                         case LDAP_REQ_UNBIND:
 554                                 tagmask = SLAP_CTRL_UNBIND;
 555                                 break;
 556                         case LDAP_REQ_ABANDON:
 557                                 tagmask = SLAP_CTRL_ABANDON;
 558                                 break;
 559                         case LDAP_REQ_EXTENDED:
 560                                 tagmask=~0L;
 561                                 assert( op->ore_reqoid.bv_val != NULL );
 562                                 if( sc->sc_extendedops != NULL ) {
 563                                         int i;
 564                                         for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 565                                                 if( strcmp( op->ore_reqoid.bv_val, sc->sc_extendedops[i] )
 566                                                         == 0 )
 567                                                 {
 568                                                         tagmask=0L;
 569                                                         break;
 570                                                 }
 571                                         }
 572                                 }
 573                                 break;
 574                         default:
 575                                 rs->sr_err = LDAP_OTHER;
 576                                 rs->sr_text = "controls internal error";
 577                                 goto return_results;
 578                         }
 579
 580                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 581                                 /* available extension */
 582
 583                                 if( !sc->sc_parse ) {
 584                                         rs->sr_err = LDAP_OTHER;
 585                                         rs->sr_text = "not yet implemented";
 586                                         goto return_results;
 587                                 }
 588
 589                                 rs->sr_err = sc->sc_parse( op, rs, c );
 590
 591                                 if( rs->sr_err != LDAP_SUCCESS ) goto return_results;
 592
 593                                 if ( sc->sc_mask & SLAP_CTRL_FRONTEND ) {
 594                                         /* kludge to disable backend_control() check */
 595                                         c->ldctl_iscritical = 0;
 596
 597                                 } else if ( tagmask == SLAP_CTRL_SEARCH &&
 598                                         sc->sc_mask & SLAP_CTRL_FRONTEND_SEARCH )
 599                                 {
 600                                         /* kludge to disable backend_control() check */
 601                                         c->ldctl_iscritical = 0;
 602                                 }
 603
 604                         } else if( c->ldctl_iscritical ) {
 605                                 /* unavailable CRITICAL control */
 606                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 607                                 rs->sr_text = "critical extension is unavailable";
 608                                 goto return_results;
 609                         }
 610
 611                 } else if( c->ldctl_iscritical ) {
 612                         /* unrecognized CRITICAL control */
 613                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 614                         rs->sr_text = "critical extension is not recognized";
 615                         goto return_results;
 616                 }
 617         }
 618
 619 return_results:
 620 #ifdef NEW_LOGGING
 621         LDAP_LOG( OPERATION, RESULTS,
 622                 "get_ctrls: n=%d rc=%d err=\"%s\"\n",
 623                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "" );
 624 #else
 625         Debug( LDAP_DEBUG_TRACE,
 626                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 627                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 628 #endif
 629
 630         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 631                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 632                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 633                         send_ldap_disconnect( op, rs );
 634                         rs->sr_err = SLAPD_DISCONNECT;
 635                 } else {
 636                         send_ldap_result( op, rs );
 637                 }
 638         }
 639
 640         return rs->sr_err;
 641 }
 642
 643 static int parseManageDSAit (
 644         Operation *op,
 645         SlapReply *rs,
 646         LDAPControl *ctrl )
 647 {
 648         if ( op->o_managedsait != SLAP_NO_CONTROL ) {
 649                 rs->sr_text = "manageDSAit control specified multiple times";
 650                 return LDAP_PROTOCOL_ERROR;
 651         }
 652
 653         if ( ctrl->ldctl_value.bv_len ) {
 654                 rs->sr_text = "manageDSAit control value not empty";
 655                 return LDAP_PROTOCOL_ERROR;
 656         }
 657
 658         op->o_managedsait = ctrl->ldctl_iscritical
 659                 ? SLAP_CRITICAL_CONTROL
 660                 : SLAP_NONCRITICAL_CONTROL;
 661
 662         return LDAP_SUCCESS;
 663 }
 664
 665 static int parseProxyAuthz (
 666         Operation *op,
 667         SlapReply *rs,
 668         LDAPControl *ctrl )
 669 {
 670         int rc;
 671         struct berval dn = { 0, NULL };
 672
 673         if ( op->o_proxy_authz != SLAP_NO_CONTROL ) {
 674                 rs->sr_text = "proxy authorization control specified multiple times";
 675                 return LDAP_PROTOCOL_ERROR;
 676         }
 677
 678         op->o_proxy_authz = ctrl->ldctl_iscritical
 679                 ? SLAP_CRITICAL_CONTROL
 680                 : SLAP_NONCRITICAL_CONTROL;
 681
 682 #ifdef NEW_LOGGING
 683         LDAP_LOG( OPERATION, ARGS,
 684                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 685                 op->o_connid,
 686                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 687                 0 );
 688 #else
 689         Debug( LDAP_DEBUG_ARGS,
 690                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 691                 op->o_connid,
 692                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 693                 0 );
 694 #endif
 695
 696         if( ctrl->ldctl_value.bv_len == 0 ) {
 697 #ifdef NEW_LOGGING
 698                 LDAP_LOG( OPERATION, RESULTS,
 699                         "parseProxyAuthz: conn=%lu anonymous\n",
 700                         op->o_connid, 0, 0 );
 701 #else
 702                 Debug( LDAP_DEBUG_TRACE,
 703                         "parseProxyAuthz: conn=%lu anonymous\n",
 704                         op->o_connid, 0, 0 );
 705 #endif
 706
 707                 /* anonymous */
 708                 free( op->o_dn.bv_val );
 709                 op->o_dn.bv_len = 0;
 710                 op->o_dn.bv_val = ch_strdup( "" );
 711
 712                 free( op->o_ndn.bv_val );
 713                 op->o_ndn.bv_len = 0;
 714                 op->o_ndn.bv_val = ch_strdup( "" );
 715
 716                 return LDAP_SUCCESS;
 717         }
 718
 719         rc = slap_sasl_getdn( op->o_conn, op,
 720                 ctrl->ldctl_value.bv_val, ctrl->ldctl_value.bv_len,
 721                 NULL, &dn, SLAP_GETDN_AUTHZID );
 722
 723         if( rc != LDAP_SUCCESS || !dn.bv_len ) {
 724                 if ( dn.bv_val ) {
 725                         ch_free( dn.bv_val );
 726                 }
 727                 rs->sr_text = "authzId mapping failed";
 728                 return LDAP_PROXY_AUTHZ_FAILURE;
 729         }
 730
 731 #ifdef NEW_LOGGING
 732         LDAP_LOG( OPERATION, RESULTS,
 733                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 734                 op->o_connid,
 735                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 736 #else
 737         Debug( LDAP_DEBUG_TRACE,
 738                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 739                 op->o_connid,
 740                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 741 #endif
 742
 743         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 744
 745         if( rc ) {
 746                 ch_free( dn.bv_val );
 747                 rs->sr_text = "not authorized to assume identity";
 748                 return LDAP_PROXY_AUTHZ_FAILURE;
 749         }
 750
 751         ch_free( op->o_dn.bv_val );
 752         ch_free( op->o_ndn.bv_val );
 753
 754         op->o_dn.bv_val = NULL;
 755         op->o_ndn = dn;
 756
 757         /*
 758          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 759          * from now on op->o_dn is normalized
 760          */
 761         ber_dupbv( &op->o_dn, &dn );
 762
 763         return LDAP_SUCCESS;
 764 }
 765
 766 static int parseNoOp (
 767         Operation *op,
 768         SlapReply *rs,
 769         LDAPControl *ctrl )
 770 {
 771         if ( op->o_noop != SLAP_NO_CONTROL ) {
 772                 rs->sr_text = "noop control specified multiple times";
 773                 return LDAP_PROTOCOL_ERROR;
 774         }
 775
 776         if ( ctrl->ldctl_value.bv_len ) {
 777                 rs->sr_text = "noop control value not empty";
 778                 return LDAP_PROTOCOL_ERROR;
 779         }
 780
 781         op->o_noop = ctrl->ldctl_iscritical
 782                 ? SLAP_CRITICAL_CONTROL
 783                 : SLAP_NONCRITICAL_CONTROL;
 784
 785         return LDAP_SUCCESS;
 786 }
 787
 788 #ifdef LDAP_CONTROL_PAGEDRESULTS
 789 static int parsePagedResults (
 790         Operation *op,
 791         SlapReply *rs,
 792         LDAPControl *ctrl )
 793 {
 794         ber_tag_t tag;
 795         ber_int_t size;
 796         BerElement *ber;
 797         struct berval cookie = { 0, NULL };
 798
 799         if ( op->o_pagedresults != SLAP_NO_CONTROL ) {
 800                 rs->sr_text = "paged results control specified multiple times";
 801                 return LDAP_PROTOCOL_ERROR;
 802         }
 803
 804         if ( ctrl->ldctl_value.bv_len == 0 ) {
 805                 rs->sr_text = "paged results control value is empty (or absent)";
 806                 return LDAP_PROTOCOL_ERROR;
 807         }
 808
 809         /* Parse the control value
 810          *      realSearchControlValue ::= SEQUENCE {
 811          *              size    INTEGER (0..maxInt),
 812          *                              -- requested page size from client
 813          *                              -- result set size estimate from server
 814          *              cookie  OCTET STRING
 815          * }
 816          */
 817         ber = ber_init( &ctrl->ldctl_value );
 818         if( ber == NULL ) {
 819                 rs->sr_text = "internal error";
 820                 return LDAP_OTHER;
 821         }
 822
 823         tag = ber_scanf( ber, "{im}", &size, &cookie );
 824         (void) ber_free( ber, 1 );
 825
 826         if( tag == LBER_ERROR ) {
 827                 rs->sr_text = "paged results control could not be decoded";
 828                 return LDAP_PROTOCOL_ERROR;
 829         }
 830
 831         if( size < 0 ) {
 832                 rs->sr_text = "paged results control size invalid";
 833                 return LDAP_PROTOCOL_ERROR;
 834         }
 835
 836         if( cookie.bv_len ) {
 837                 PagedResultsCookie reqcookie;
 838                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 839                         /* bad cookie */
 840                         rs->sr_text = "paged results cookie is invalid";
 841                         return LDAP_PROTOCOL_ERROR;
 842                 }
 843
 844                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 845
 846                 if( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 847                         /* bad cookie */
 848                         rs->sr_text = "paged results cookie is invalid";
 849                         return LDAP_PROTOCOL_ERROR;
 850
 851                 } else if( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 852                         rs->sr_text = "paged results cookie is invalid or old";
 853                         return LDAP_UNWILLING_TO_PERFORM;
 854                 }
 855         } else {
 856                 /* Initial request.  Initialize state. */
 857                 op->o_pagedresults_state.ps_cookie = 0;
 858                 op->o_pagedresults_state.ps_id = NOID;
 859         }
 860
 861         op->o_pagedresults_size = size;
 862
 863         op->o_pagedresults = ctrl->ldctl_iscritical
 864                 ? SLAP_CRITICAL_CONTROL
 865                 : SLAP_NONCRITICAL_CONTROL;
 866
 867         return LDAP_SUCCESS;
 868 }
 869 #endif
 870
 871 static int parseAssert (
 872         Operation *op,
 873         SlapReply *rs,
 874         LDAPControl *ctrl )
 875 {
 876         BerElement      *ber;
 877         struct berval   fstr = { 0, NULL };
 878         const char *err_msg = "";
 879
 880         if ( op->o_assert != SLAP_NO_CONTROL ) {
 881                 rs->sr_text = "assert control specified multiple times";
 882                 return LDAP_PROTOCOL_ERROR;
 883         }
 884
 885         if ( ctrl->ldctl_value.bv_len == 0 ) {
 886                 rs->sr_text = "assert control value is empty (or absent)";
 887                 return LDAP_PROTOCOL_ERROR;
 888         }
 889
 890         ber = ber_init( &(ctrl->ldctl_value) );
 891         if (ber == NULL) {
 892                 rs->sr_text = "internal error";
 893                 return LDAP_OTHER;
 894         }
 895
 896         rs->sr_err = get_filter( op, ber, &(op->o_assertion), &rs->sr_text);
 897
 898         if( rs->sr_err != LDAP_SUCCESS ) {
 899                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 900                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 901                         send_ldap_disconnect( op, rs );
 902                         rs->sr_err = SLAPD_DISCONNECT;
 903                 } else {
 904                         send_ldap_result( op, rs );
 905                 }
 906                 if( op->o_assertion != NULL) {
 907                         filter_free_x( op, op->o_assertion );
 908                 }
 909         }
 910 #ifdef LDAP_DEBUG
 911         else {
 912                 filter2bv_x( op, op->o_assertion, &fstr );
 913         }
 914
 915 #ifdef NEW_LOGGING
 916         LDAP_LOG( OPERATION, ARGS,
 917                 "parseAssert: conn %ld assert: %s\n",
 918                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
 919 #else
 920         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
 921                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
 922 #endif
 923         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
 924 #endif
 925
 926         op->o_assert = ctrl->ldctl_iscritical
 927                 ? SLAP_CRITICAL_CONTROL
 928                 : SLAP_NONCRITICAL_CONTROL;
 929
 930         rs->sr_err = LDAP_SUCCESS;
 931         return LDAP_SUCCESS;
 932 }
 933
 934 int parseValuesReturnFilter (
 935         Operation *op,
 936         SlapReply *rs,
 937         LDAPControl *ctrl )
 938 {
 939         BerElement      *ber;
 940         struct berval   fstr = { 0, NULL };
 941         const char *err_msg = "";
 942
 943         if ( op->o_valuesreturnfilter != SLAP_NO_CONTROL ) {
 944                 rs->sr_text = "valuesReturnFilter control specified multiple times";
 945                 return LDAP_PROTOCOL_ERROR;
 946         }
 947
 948         if ( ctrl->ldctl_value.bv_len == 0 ) {
 949                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
 950                 return LDAP_PROTOCOL_ERROR;
 951         }
 952
 953         ber = ber_init( &(ctrl->ldctl_value) );
 954         if (ber == NULL) {
 955                 rs->sr_text = "internal error";
 956                 return LDAP_OTHER;
 957         }
 958
 959         rs->sr_err = get_vrFilter( op, ber, &(op->o_vrFilter), &rs->sr_text);
 960
 961         if( rs->sr_err != LDAP_SUCCESS ) {
 962                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 963                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 964                         send_ldap_disconnect( op, rs );
 965                         rs->sr_err = SLAPD_DISCONNECT;
 966                 } else {
 967                         send_ldap_result( op, rs );
 968                 }
 969                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
 970
 971         }
 972 #ifdef LDAP_DEBUG
 973         else {
 974                 vrFilter2bv( op, op->o_vrFilter, &fstr );
 975         }
 976
 977 #ifdef NEW_LOGGING
 978         LDAP_LOG( OPERATION, ARGS,
 979                 "parseValuesReturnFilter: conn %d       vrFilter: %s\n",
 980                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
 981 #else
 982         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
 983                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
 984 #endif
 985         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
 986 #endif
 987
 988         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
 989                 ? SLAP_CRITICAL_CONTROL
 990                 : SLAP_NONCRITICAL_CONTROL;
 991
 992         rs->sr_err = LDAP_SUCCESS;
 993         return LDAP_SUCCESS;
 994 }
 995
 996 #ifdef LDAP_CONTROL_SUBENTRIES
 997 static int parseSubentries (
 998         Operation *op,
 999         SlapReply *rs,
1000         LDAPControl *ctrl )
1001 {
1002         if ( op->o_subentries != SLAP_NO_CONTROL ) {
1003                 rs->sr_text = "subentries control specified multiple times";
1004                 return LDAP_PROTOCOL_ERROR;
1005         }
1006
1007         /* FIXME: should use BER library */
1008         if( ( ctrl->ldctl_value.bv_len != 3 )
1009                 && ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1010                 && ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1011         {
1012                 rs->sr_text = "subentries control value encoding is bogus";
1013                 return LDAP_PROTOCOL_ERROR;
1014         }
1015
1016         op->o_subentries = ctrl->ldctl_iscritical
1017                 ? SLAP_CRITICAL_CONTROL
1018                 : SLAP_NONCRITICAL_CONTROL;
1019
1020         op->o_subentries_visibility = (ctrl->ldctl_value.bv_val[2] != 0x00);
1021
1022         return LDAP_SUCCESS;
1023 }
1024 #endif
1025
1026 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1027 static int parsePermissiveModify (
1028         Operation *op,
1029         SlapReply *rs,
1030         LDAPControl *ctrl )
1031 {
1032         if ( op->o_permissive_modify != SLAP_NO_CONTROL ) {
1033                 rs->sr_text = "permissiveModify control specified multiple times";
1034                 return LDAP_PROTOCOL_ERROR;
1035         }
1036
1037         if ( ctrl->ldctl_value.bv_len ) {
1038                 rs->sr_text = "permissiveModify control value not empty";
1039                 return LDAP_PROTOCOL_ERROR;
1040         }
1041
1042         op->o_permissive_modify = ctrl->ldctl_iscritical
1043                 ? SLAP_CRITICAL_CONTROL
1044                 : SLAP_NONCRITICAL_CONTROL;
1045
1046         return LDAP_SUCCESS;
1047 }
1048 #endif
1049
1050 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1051 static int parseDomainScope (
1052         Operation *op,
1053         SlapReply *rs,
1054         LDAPControl *ctrl )
1055 {
1056         if ( op->o_domain_scope != SLAP_NO_CONTROL ) {
1057                 rs->sr_text = "domainScope control specified multiple times";
1058                 return LDAP_PROTOCOL_ERROR;
1059         }
1060
1061         if ( ctrl->ldctl_value.bv_len ) {
1062                 rs->sr_text = "domainScope control value not empty";
1063                 return LDAP_PROTOCOL_ERROR;
1064         }
1065
1066         op->o_domain_scope = ctrl->ldctl_iscritical
1067                 ? SLAP_CRITICAL_CONTROL
1068                 : SLAP_NONCRITICAL_CONTROL;
1069
1070         return LDAP_SUCCESS;
1071 }
1072 #endif
1073
1074 #ifdef LDAP_CLIENT_UPDATE
1075 static int parseClientUpdate (
1076         Operation *op,
1077         SlapReply *rs,
1078         LDAPControl *ctrl )
1079 {
1080         ber_tag_t tag;
1081         BerElement *ber;
1082         ber_int_t type;
1083         ber_int_t interval;
1084         ber_len_t len;
1085         struct berval scheme = { 0, NULL };
1086         struct berval cookie = { 0, NULL };
1087
1088         if ( op->o_clientupdate != SLAP_NO_CONTROL ) {
1089                 rs->sr_text = "LCUP client update control specified multiple times";
1090                 return LDAP_PROTOCOL_ERROR;
1091         }
1092
1093 #ifdef LDAP_SYNC
1094         if ( op->o_sync != SLAP_NO_CONTROL ) {
1095                 rs->sr_text = "LDAP Client Update and Sync controls used together";
1096                 return LDAP_PROTOCOL_ERROR;
1097         }
1098 #endif
1099
1100         if ( ctrl->ldctl_value.bv_len == 0 ) {
1101                 rs->sr_text = "LCUP client update control value is empty (or absent)";
1102                 return LDAP_PROTOCOL_ERROR;
1103         }
1104
1105         /* Parse the control value
1106          *      ClientUpdateControlValue ::= SEQUENCE {
1107          *              updateType      ENUMERATED {
1108          *                                      synchronizeOnly {0},
1109          *                                      synchronizeAndPersist {1},
1110          *                                      persistOnly {2} },
1111          *              sendCookieInterval INTEGER OPTIONAL,
1112          *              cookie          LCUPCookie OPTIONAL
1113          *      }
1114          */
1115
1116         ber = ber_init( &ctrl->ldctl_value );
1117         if( ber == NULL ) {
1118                 rs->sr_text = "internal error";
1119                 return LDAP_OTHER;
1120         }
1121
1122         if ( (tag = ber_scanf( ber, "{i" /*}*/, &type )) == LBER_ERROR ) {
1123                 rs->sr_text = "LCUP client update control : decoding error";
1124                 return LDAP_PROTOCOL_ERROR;
1125         }
1126
1127         switch( type ) {
1128         case LDAP_CUP_SYNC_ONLY:
1129                 type = SLAP_LCUP_SYNC;
1130                 break;
1131         case LDAP_CUP_SYNC_AND_PERSIST:
1132                 type = SLAP_LCUP_SYNC_AND_PERSIST;
1133                 break;
1134         case LDAP_CUP_PERSIST_ONLY:
1135                 type = SLAP_LCUP_PERSIST;
1136                 break;
1137         default:
1138                 rs->sr_text = "LCUP client update control : unknown update type";
1139                 return LDAP_PROTOCOL_ERROR;
1140         }
1141
1142         if ( (tag = ber_peek_tag( ber, &len )) == LBER_DEFAULT ) {
1143                 rs->sr_text = "LCUP client update control : decoding error";
1144                 return LDAP_PROTOCOL_ERROR;
1145         }
1146
1147         if ( tag == LDAP_CUP_TAG_INTERVAL ) {
1148                 if ( (tag = ber_scanf( ber, "i", &interval )) == LBER_ERROR ) {
1149                         rs->sr_text = "LCUP client update control : decoding error";
1150                         return LDAP_PROTOCOL_ERROR;
1151                 }
1152
1153                 if ( interval <= 0 ) {
1154                         /* server chooses interval */
1155                         interval = LDAP_CUP_DEFAULT_SEND_COOKIE_INTERVAL;
1156                 }
1157
1158         } else {
1159                 /* server chooses interval */
1160                 interval = LDAP_CUP_DEFAULT_SEND_COOKIE_INTERVAL;
1161         }
1162
1163         if ( (tag = ber_peek_tag( ber, &len )) == LBER_DEFAULT ) {
1164                 rs->sr_text = "LCUP client update control : decoding error";
1165                 return LDAP_PROTOCOL_ERROR;
1166         }
1167
1168         if ( tag == LDAP_CUP_TAG_COOKIE ) {
1169                 if ( (tag = ber_scanf( ber, /*{*/ "{mm}}",
1170                         &scheme, &cookie )) == LBER_ERROR )
1171                 {
1172                         rs->sr_text = "LCUP client update control : decoding error";
1173                         return LDAP_PROTOCOL_ERROR;
1174                 }
1175         }
1176
1177         /* TODO : Cookie Scheme Validation */
1178 #if 0
1179         if ( lcup_cookie_scheme_validate(scheme) != LDAP_SUCCESS ) {
1180                 rs->sr_text = "Unsupported LCUP cookie scheme";
1181                 return LCUP_UNSUPPORTED_SCHEME;
1182         }
1183
1184         if ( lcup_cookie_validate(scheme, cookie) != LDAP_SUCCESS ) {
1185                 rs->sr_text = "Invalid LCUP cookie";
1186                 return LCUP_INVALID_COOKIE;
1187         }
1188 #endif
1189
1190         ber_dupbv( &op->o_clientupdate_state, &cookie );
1191
1192         (void) ber_free( ber, 1 );
1193
1194         op->o_clientupdate_type = (char) type;
1195         op->o_clientupdate_interval = interval;
1196
1197         op->o_clientupdate = ctrl->ldctl_iscritical
1198                 ? SLAP_CRITICAL_CONTROL
1199                 : SLAP_NONCRITICAL_CONTROL;
1200
1201         return LDAP_SUCCESS;
1202 }
1203 #endif
1204
1205 #ifdef LDAP_SYNC
1206 static int parseLdupSync (
1207         Operation *op,
1208         SlapReply *rs,
1209         LDAPControl *ctrl )
1210 {
1211         ber_tag_t tag;
1212         BerElement *ber;
1213         ber_int_t mode;
1214         ber_len_t len;
1215         struct berval cookie = { 0, NULL };
1216
1217         if ( op->o_sync != SLAP_NO_CONTROL ) {
1218                 rs->sr_text = "LDAP Sync control specified multiple times";
1219                 return LDAP_PROTOCOL_ERROR;
1220         }
1221
1222 #ifdef LDAP_CLIENT_UPDATE
1223         if ( op->o_clientupdate != SLAP_NO_CONTROL ) {
1224                 rs->sr_text = "LDAP Sync and LDAP Client Update controls used together";
1225                 return LDAP_PROTOCOL_ERROR;
1226         }
1227 #endif
1228
1229         if ( ctrl->ldctl_value.bv_len == 0 ) {
1230                 rs->sr_text = "LDAP Sync control value is empty (or absent)";
1231                 return LDAP_PROTOCOL_ERROR;
1232         }
1233
1234         /* Parse the control value
1235          *      syncRequestValue ::= SEQUENCE {
1236          *              mode   ENUMERATED {
1237          *                      -- 0 unused
1238          *                      refreshOnly             (1),
1239          *                      -- 2 reserved
1240          *                      refreshAndPersist       (3)
1241          *              },
1242          *              cookie  syncCookie OPTIONAL
1243          *      }
1244          */
1245
1246         ber = ber_init( &ctrl->ldctl_value );
1247         if( ber == NULL ) {
1248                 rs->sr_text = "internal error";
1249                 return LDAP_OTHER;
1250         }
1251
1252         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
1253                 rs->sr_text = "LDAP Sync control : mode decoding error";
1254                 return LDAP_PROTOCOL_ERROR;
1255         }
1256
1257         switch( mode ) {
1258         case LDAP_SYNC_REFRESH_ONLY:
1259                 mode = SLAP_SYNC_REFRESH;
1260                 break;
1261         case LDAP_SYNC_REFRESH_AND_PERSIST:
1262                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
1263                 break;
1264         default:
1265                 rs->sr_text = "LDAP Sync control : unknown update mode";
1266                 return LDAP_PROTOCOL_ERROR;
1267         }
1268
1269         tag = ber_peek_tag( ber, &len );
1270
1271         if ( tag == LDAP_SYNC_TAG_COOKIE ) {
1272                 if (( ber_scanf( ber, /*{*/ "m}",
1273                                         &cookie )) == LBER_ERROR ) {
1274                         rs->sr_text = "LDAP Sync control : cookie decoding error";
1275                         return LDAP_PROTOCOL_ERROR;
1276                 }
1277         } else {
1278                 if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
1279                         rs->sr_text = "LDAP Sync control : decoding error";
1280                         return LDAP_PROTOCOL_ERROR;
1281                 }
1282                 cookie.bv_len = 0;
1283                 cookie.bv_val = NULL;
1284         }
1285
1286         /* TODO : Cookie Scheme Validation */
1287 #if 0
1288         if ( lcup_cookie_scheme_validate(scheme) != LDAP_SUCCESS ) {
1289                 rs->sr_text = "Unsupported LCUP cookie scheme";
1290                 return LCUP_UNSUPPORTED_SCHEME;
1291         }
1292
1293         if ( lcup_cookie_validate(scheme, cookie) != LDAP_SUCCESS ) {
1294                 rs->sr_text = "Invalid LCUP cookie";
1295                 return LCUP_INVALID_COOKIE;
1296         }
1297 #endif
1298
1299         ber_dupbv( &op->o_sync_state, &cookie );
1300
1301         (void) ber_free( ber, 1 );
1302
1303         op->o_sync_mode = (char) mode;
1304
1305         op->o_sync = ctrl->ldctl_iscritical
1306                 ? SLAP_CRITICAL_CONTROL
1307                 : SLAP_NONCRITICAL_CONTROL;
1308
1309         return LDAP_SUCCESS;
1310 }
1311 #endif