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 1998-2008 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 #include "ldif.h"
  25 #include "lutil.h"
  26
  27 #include "../../libraries/liblber/lber-int.h"
  28
  29 static SLAP_CTRL_PARSE_FN parseAssert;
  30 static SLAP_CTRL_PARSE_FN parseDomainScope;
  31 static SLAP_CTRL_PARSE_FN parseDontUseCopy;
  32 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  33 static SLAP_CTRL_PARSE_FN parseNoOp;
  34 static SLAP_CTRL_PARSE_FN parsePagedResults;
  35 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  36 static SLAP_CTRL_PARSE_FN parsePreRead, parsePostRead;
  37 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  38 static SLAP_CTRL_PARSE_FN parseRelax;
  39 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  40 #ifdef SLAP_CONTROL_X_SORTEDRESULTS
  41 static SLAP_CTRL_PARSE_FN parseSortedResults;
  42 #endif
  43 static SLAP_CTRL_PARSE_FN parseSubentries;
  44 #ifdef SLAP_CONTROL_X_TREE_DELETE
  45 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  46 #endif
  47 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  48 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
  49 static SLAP_CTRL_PARSE_FN parseSessionTracking;
  50 #endif
  51
  52 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  53
  54 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  55 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  56
  57 struct slap_control_ids slap_cids;
  58
  59 struct slap_control {
  60         /* Control OID */
  61         char *sc_oid;
  62
  63         /* The controlID for this control */
  64         int sc_cid;
  65
  66         /* Operations supported by control */
  67         slap_mask_t sc_mask;
  68
  69         /* Extended operations supported by control */
  70         char **sc_extendedops;          /* input */
  71         BerVarray sc_extendedopsbv;     /* run-time use */
  72
  73         /* Control parsing callback */
  74         SLAP_CTRL_PARSE_FN *sc_parse;
  75
  76         LDAP_SLIST_ENTRY(slap_control) sc_next;
  77 };
  78
  79 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  80         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  81
  82 /*
  83  * all known request control OIDs should be added to this list
  84  */
  85 /*
  86  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  87  * addresses an undefined control; this allows to safely test for
  88  * well known controls even if they are not registered, e.g. if
  89  * they get moved to modules.  An example is sc_LDAPsync, which
  90  * is implemented in the syncprov overlay and thus, if configured
  91  * as dynamic module, may not be registered.  One side effect is that
  92  * slap_known_controls[0] == NULL, so it should always be used
  93  * starting from 1.
  94  * FIXME: should we define the "undefined control" oid?
  95  */
  96 char *slap_known_controls[SLAP_MAX_CIDS+1];
  97 static int num_known_controls = 1;
  98
  99 static char *proxy_authz_extops[] = {
 100         LDAP_EXOP_MODIFY_PASSWD,
 101         LDAP_EXOP_WHO_AM_I,
 102         LDAP_EXOP_REFRESH,
 103         NULL
 104 };
 105
 106 static char *manageDSAit_extops[] = {
 107         LDAP_EXOP_REFRESH,
 108         NULL
 109 };
 110
 111 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
 112 static char *session_tracking_extops[] = {
 113         LDAP_EXOP_MODIFY_PASSWD,
 114         LDAP_EXOP_WHO_AM_I,
 115         LDAP_EXOP_REFRESH,
 116         NULL
 117 };
 118 #endif
 119
 120 static struct slap_control control_defs[] = {
 121         {  LDAP_CONTROL_ASSERT,
 122                 (int)offsetof(struct slap_control_ids, sc_assert),
 123                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
 124                         SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
 125                 NULL, NULL,
 126                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 127         { LDAP_CONTROL_PRE_READ,
 128                 (int)offsetof(struct slap_control_ids, sc_preRead),
 129                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 130                 NULL, NULL,
 131                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 132         { LDAP_CONTROL_POST_READ,
 133                 (int)offsetof(struct slap_control_ids, sc_postRead),
 134                 SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 135                 NULL, NULL,
 136                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 137         { LDAP_CONTROL_VALUESRETURNFILTER,
 138                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 139                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH,
 140                 NULL, NULL,
 141                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 142         { LDAP_CONTROL_PAGEDRESULTS,
 143                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 144                 SLAP_CTRL_SEARCH,
 145                 NULL, NULL,
 146                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 147 #ifdef SLAP_CONTROL_X_SORTEDRESULTS
 148         { LDAP_CONTROL_SORTREQUEST,
 149                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 150                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 151                 NULL, NULL,
 152                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 153 #endif
 154         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 155                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 156                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 157                 NULL, NULL,
 158                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 159         { LDAP_CONTROL_DONTUSECOPY,
 160                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 161                 SLAP_CTRL_GLOBAL|SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
 162                 NULL, NULL,
 163                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 164         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 165                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 166                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
 167                 NULL, NULL,
 168                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 169 #ifdef SLAP_CONTROL_X_TREE_DELETE
 170         { LDAP_CONTROL_X_TREE_DELETE,
 171                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 172                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
 173                 NULL, NULL,
 174                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 175 #endif
 176         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 177                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 178                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 179                 NULL, NULL,
 180                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 181         { LDAP_CONTROL_SUBENTRIES,
 182                 (int)offsetof(struct slap_control_ids, sc_subentries),
 183                 SLAP_CTRL_SEARCH,
 184                 NULL, NULL,
 185                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 186         { LDAP_CONTROL_NOOP,
 187                 (int)offsetof(struct slap_control_ids, sc_noOp),
 188                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 189                 NULL, NULL,
 190                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 191         { LDAP_CONTROL_RELAX,
 192                 (int)offsetof(struct slap_control_ids, sc_relax),
 193                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 194                 NULL, NULL,
 195                 parseRelax, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 196 #ifdef LDAP_X_TXN
 197         { LDAP_CONTROL_X_TXN_SPEC,
 198                 (int)offsetof(struct slap_control_ids, sc_txnSpec),
 199                 SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 200                 NULL, NULL,
 201                 txn_spec_ctrl, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 202 #endif
 203         { LDAP_CONTROL_MANAGEDSAIT,
 204                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 205                 SLAP_CTRL_ACCESS,
 206                 manageDSAit_extops, NULL,
 207                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 208         { LDAP_CONTROL_PROXY_AUTHZ,
 209                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 210                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
 211                 proxy_authz_extops, NULL,
 212                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 213 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
 214         { LDAP_CONTROL_X_SESSION_TRACKING,
 215                 (int)offsetof(struct slap_control_ids, sc_sessionTracking),
 216                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS|SLAP_CTRL_BIND|SLAP_CTRL_HIDE,
 217                 session_tracking_extops, NULL,
 218                 parseSessionTracking, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 219 #endif
 220         { NULL, 0, 0, NULL, 0, NULL, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 221 };
 222
 223 static struct slap_control *
 224 find_ctrl( const char *oid );
 225
 226 /*
 227  * Register a supported control.
 228  *
 229  * This can be called by an OpenLDAP plugin or, indirectly, by a
 230  * SLAPI plugin calling slapi_register_supported_control().
 231  *
 232  * NOTE: if flags == 1 the control is replaced if already registered;
 233  * otherwise registering an already registered control is not allowed.
 234  */
 235 int
 236 register_supported_control2(const char *controloid,
 237         slap_mask_t controlmask,
 238         char **controlexops,
 239         SLAP_CTRL_PARSE_FN *controlparsefn,
 240         unsigned flags,
 241         int *controlcid)
 242 {
 243         struct slap_control *sc = NULL;
 244         int i;
 245         BerVarray extendedopsbv = NULL;
 246
 247         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 248                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 249                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 250                 SLAP_MAX_CIDS, 0, 0 );
 251                 return LDAP_OTHER;
 252         }
 253
 254         if ( controloid == NULL ) {
 255                 return LDAP_PARAM_ERROR;
 256         }
 257
 258         /* check if already registered */
 259         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 260                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 261                         if ( flags == 1 ) {
 262                                 Debug( LDAP_DEBUG_TRACE,
 263                                         "Control %s already registered; replacing.\n",
 264                                         controloid, 0, 0 );
 265                                 /* (find and) replace existing handler */
 266                                 sc = find_ctrl( controloid );
 267                                 assert( sc != NULL );
 268                                 break;
 269                         }
 270
 271                         Debug( LDAP_DEBUG_ANY,
 272                                 "Control %s already registered.\n",
 273                                 controloid, 0, 0 );
 274                         return LDAP_PARAM_ERROR;
 275                 }
 276         }
 277
 278         /* turn compatible extended operations into bervals */
 279         if ( controlexops != NULL ) {
 280                 int i;
 281
 282                 for ( i = 0; controlexops[ i ]; i++ );
 283
 284                 extendedopsbv = ber_memcalloc( i + 1, sizeof( struct berval ) );
 285                 if ( extendedopsbv == NULL ) {
 286                         return LDAP_NO_MEMORY;
 287                 }
 288
 289                 for ( i = 0; controlexops[ i ]; i++ ) {
 290                         ber_str2bv( controlexops[ i ], 0, 1, &extendedopsbv[ i ] );
 291                 }
 292         }
 293
 294         if ( sc == NULL ) {
 295                 sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 296                 if ( sc == NULL ) {
 297                         return LDAP_NO_MEMORY;
 298                 }
 299
 300                 sc->sc_oid = ch_strdup( controloid );
 301                 sc->sc_cid = num_known_controls;
 302
 303                 /* Update slap_known_controls, too. */
 304                 slap_known_controls[num_known_controls - 1] = sc->sc_oid;
 305                 slap_known_controls[num_known_controls++] = NULL;
 306
 307                 LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 308                 LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 309
 310         } else {
 311                 if ( sc->sc_extendedopsbv ) {
 312                         /* FIXME: in principle, we should rather merge
 313                          * existing extops with those supported by the
 314                          * new control handling implementation.
 315                          * In fact, whether a control is compatible with
 316                          * an extop should not be a matter of implementation.
 317                          * We likely also need a means for a newly
 318                          * registered extop to declare that it is
 319                          * comptible with an already registered control.
 320                          */
 321                         ber_bvarray_free( sc->sc_extendedopsbv );
 322                         sc->sc_extendedopsbv = NULL;
 323                         sc->sc_extendedops = NULL;
 324                 }
 325         }
 326
 327         sc->sc_extendedopsbv = extendedopsbv;
 328         sc->sc_mask = controlmask;
 329         sc->sc_parse = controlparsefn;
 330         if ( controlcid ) {
 331                 *controlcid = sc->sc_cid;
 332         }
 333
 334         return LDAP_SUCCESS;
 335 }
 336
 337 /*
 338  * One-time initialization of internal controls.
 339  */
 340 int
 341 slap_controls_init( void )
 342 {
 343         int i, rc;
 344
 345         rc = LDAP_SUCCESS;
 346
 347         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 348                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 349                 rc = register_supported_control( control_defs[i].sc_oid,
 350                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 351                         control_defs[i].sc_parse, cid );
 352                 if ( rc != LDAP_SUCCESS ) break;
 353         }
 354
 355         return rc;
 356 }
 357
 358 /*
 359  * Free memory associated with list of supported controls.
 360  */
 361 void
 362 controls_destroy( void )
 363 {
 364         struct slap_control *sc;
 365
 366         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 367                 sc = LDAP_SLIST_FIRST(&controls_list);
 368                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 369
 370                 ch_free( sc->sc_oid );
 371                 if ( sc->sc_extendedopsbv != NULL ) {
 372                         ber_bvarray_free( sc->sc_extendedopsbv );
 373                 }
 374                 ch_free( sc );
 375         }
 376 }
 377
 378 /*
 379  * Format the supportedControl attribute of the root DSE,
 380  * detailing which controls are supported by the directory
 381  * server.
 382  */
 383 int
 384 controls_root_dse_info( Entry *e )
 385 {
 386         AttributeDescription *ad_supportedControl
 387                 = slap_schema.si_ad_supportedControl;
 388         struct berval vals[2];
 389         struct slap_control *sc;
 390
 391         vals[1].bv_val = NULL;
 392         vals[1].bv_len = 0;
 393
 394         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 395                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 396
 397                 vals[0].bv_val = sc->sc_oid;
 398                 vals[0].bv_len = strlen( sc->sc_oid );
 399
 400                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 401                         return -1;
 402                 }
 403         }
 404
 405         return 0;
 406 }
 407
 408 /*
 409  * Return a list of OIDs and operation masks for supported
 410  * controls. Used by SLAPI.
 411  */
 412 int
 413 get_supported_controls(char ***ctrloidsp,
 414         slap_mask_t **ctrlmasks)
 415 {
 416         int n;
 417         char **oids;
 418         slap_mask_t *masks;
 419         struct slap_control *sc;
 420
 421         n = 0;
 422
 423         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 424                 n++;
 425         }
 426
 427         if ( n == 0 ) {
 428                 *ctrloidsp = NULL;
 429                 *ctrlmasks = NULL;
 430                 return LDAP_SUCCESS;
 431         }
 432
 433         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 434         if ( oids == NULL ) {
 435                 return LDAP_NO_MEMORY;
 436         }
 437         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 438         if  ( masks == NULL ) {
 439                 SLAP_FREE( oids );
 440                 return LDAP_NO_MEMORY;
 441         }
 442
 443         n = 0;
 444
 445         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 446                 oids[n] = ch_strdup( sc->sc_oid );
 447                 masks[n] = sc->sc_mask;
 448                 n++;
 449         }
 450         oids[n] = NULL;
 451         masks[n] = 0;
 452
 453         *ctrloidsp = oids;
 454         *ctrlmasks = masks;
 455
 456         return LDAP_SUCCESS;
 457 }
 458
 459 /*
 460  * Find a control given its OID.
 461  */
 462 static struct slap_control *
 463 find_ctrl( const char *oid )
 464 {
 465         struct slap_control *sc;
 466
 467         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 468                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 469                         return sc;
 470                 }
 471         }
 472
 473         return NULL;
 474 }
 475
 476 int
 477 slap_find_control_id(
 478         const char *oid,
 479         int *cid )
 480 {
 481         struct slap_control *ctrl = find_ctrl( oid );
 482         if ( ctrl ) {
 483                 if ( cid ) *cid = ctrl->sc_cid;
 484                 return LDAP_SUCCESS;
 485         }
 486         return LDAP_CONTROL_NOT_FOUND;
 487 }
 488
 489 int
 490 slap_global_control( Operation *op, const char *oid, int *cid )
 491 {
 492         struct slap_control *ctrl = find_ctrl( oid );
 493
 494         if ( ctrl == NULL ) {
 495                 /* should not be reachable */
 496                 Debug( LDAP_DEBUG_ANY,
 497                         "slap_global_control: unrecognized control: %s\n",
 498                         oid, 0, 0 );
 499                 return LDAP_CONTROL_NOT_FOUND;
 500         }
 501
 502         if ( cid ) *cid = ctrl->sc_cid;
 503
 504         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 505                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 506                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 507         {
 508                 return LDAP_COMPARE_TRUE;
 509         }
 510
 511 #if 0
 512         Debug( LDAP_DEBUG_TRACE,
 513                 "slap_global_control: unavailable control: %s\n",
 514                 oid, 0, 0 );
 515 #endif
 516
 517         return LDAP_COMPARE_FALSE;
 518 }
 519
 520 void slap_free_ctrls(
 521         Operation *op,
 522         LDAPControl **ctrls )
 523 {
 524         int i;
 525
 526         for (i=0; ctrls[i]; i++) {
 527                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 528         }
 529         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 530 }
 531
 532 int slap_parse_ctrl(
 533         Operation *op,
 534         SlapReply *rs,
 535         LDAPControl *control,
 536         const char **text )
 537 {
 538         struct slap_control *sc;
 539
 540         sc = find_ctrl( control->ldctl_oid );
 541         if( sc != NULL ) {
 542                 /* recognized control */
 543                 slap_mask_t tagmask;
 544                 switch( op->o_tag ) {
 545                 case LDAP_REQ_ADD:
 546                         tagmask = SLAP_CTRL_ADD;
 547                         break;
 548                 case LDAP_REQ_BIND:
 549                         tagmask = SLAP_CTRL_BIND;
 550                         break;
 551                 case LDAP_REQ_COMPARE:
 552                         tagmask = SLAP_CTRL_COMPARE;
 553                         break;
 554                 case LDAP_REQ_DELETE:
 555                         tagmask = SLAP_CTRL_DELETE;
 556                         break;
 557                 case LDAP_REQ_MODIFY:
 558                         tagmask = SLAP_CTRL_MODIFY;
 559                         break;
 560                 case LDAP_REQ_RENAME:
 561                         tagmask = SLAP_CTRL_RENAME;
 562                         break;
 563                 case LDAP_REQ_SEARCH:
 564                         tagmask = SLAP_CTRL_SEARCH;
 565                         break;
 566                 case LDAP_REQ_UNBIND:
 567                         tagmask = SLAP_CTRL_UNBIND;
 568                         break;
 569                 case LDAP_REQ_ABANDON:
 570                         tagmask = SLAP_CTRL_ABANDON;
 571                         break;
 572                 case LDAP_REQ_EXTENDED:
 573                         tagmask=~0L;
 574                         assert( op->ore_reqoid.bv_val != NULL );
 575                         if( sc->sc_extendedopsbv != NULL ) {
 576                                 int i;
 577                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 578                                         if( bvmatch( &op->ore_reqoid,
 579                                                 &sc->sc_extendedopsbv[i] ) )
 580                                         {
 581                                                 tagmask=0L;
 582                                                 break;
 583                                         }
 584                                 }
 585                         }
 586                         break;
 587                 default:
 588                         *text = "controls internal error";
 589                         return LDAP_OTHER;
 590                 }
 591
 592                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 593                         /* available extension */
 594                         int     rc;
 595
 596                         if( !sc->sc_parse ) {
 597                                 *text = "not yet implemented";
 598                                 return LDAP_OTHER;
 599                         }
 600
 601                         rc = sc->sc_parse( op, rs, control );
 602                         if ( rc ) {
 603                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 604                                 return rc;
 605                         }
 606
 607                 } else if( control->ldctl_iscritical ) {
 608                         /* unavailable CRITICAL control */
 609                         *text = "critical extension is unavailable";
 610                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 611                 }
 612         } else if( control->ldctl_iscritical ) {
 613                 /* unrecognized CRITICAL control */
 614                 *text = "critical extension is not recognized";
 615                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 616         }
 617
 618         return LDAP_SUCCESS;
 619 }
 620
 621 int get_ctrls(
 622         Operation *op,
 623         SlapReply *rs,
 624         int sendres )
 625 {
 626         int nctrls = 0;
 627         ber_tag_t tag;
 628         ber_len_t len;
 629         char *opaque;
 630         BerElement *ber = op->o_ber;
 631         struct berval bv;
 632
 633         len = ber_pvt_ber_remaining(ber);
 634
 635         if( len == 0) {
 636                 /* no controls */
 637                 rs->sr_err = LDAP_SUCCESS;
 638                 return rs->sr_err;
 639         }
 640
 641         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 642                 if( tag == LBER_ERROR ) {
 643                         rs->sr_err = SLAPD_DISCONNECT;
 644                         rs->sr_text = "unexpected data in PDU";
 645                 }
 646
 647                 goto return_results;
 648         }
 649
 650         Debug( LDAP_DEBUG_TRACE,
 651                 "=> get_ctrls\n", 0, 0, 0 );
 652
 653         if( op->o_protocol < LDAP_VERSION3 ) {
 654                 rs->sr_err = SLAPD_DISCONNECT;
 655                 rs->sr_text = "controls require LDAPv3";
 656                 goto return_results;
 657         }
 658
 659         /* one for first control, one for termination */
 660         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 661
 662 #if 0
 663         if( op->ctrls == NULL ) {
 664                 rs->sr_err = LDAP_NO_MEMORY;
 665                 rs->sr_text = "no memory";
 666                 goto return_results;
 667         }
 668 #endif
 669
 670         op->o_ctrls[nctrls] = NULL;
 671
 672         /* step through each element */
 673         for( tag = ber_first_element( ber, &len, &opaque );
 674                 tag != LBER_ERROR;
 675                 tag = ber_next_element( ber, &len, opaque ) )
 676         {
 677                 LDAPControl *c;
 678                 LDAPControl **tctrls;
 679
 680                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 681                 memset(c, 0, sizeof(LDAPControl));
 682
 683                 /* allocate pointer space for current controls (nctrls)
 684                  * + this control + extra NULL
 685                  */
 686                 tctrls = op->o_tmprealloc( op->o_ctrls,
 687                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 688
 689 #if 0
 690                 if( tctrls == NULL ) {
 691                         ch_free( c );
 692                         ldap_controls_free(op->o_ctrls);
 693                         op->o_ctrls = NULL;
 694
 695                         rs->sr_err = LDAP_NO_MEMORY;
 696                         rs->sr_text = "no memory";
 697                         goto return_results;
 698                 }
 699 #endif
 700                 op->o_ctrls = tctrls;
 701
 702                 op->o_ctrls[nctrls++] = c;
 703                 op->o_ctrls[nctrls] = NULL;
 704
 705                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 706                 c->ldctl_oid = bv.bv_val;
 707
 708                 if( tag == LBER_ERROR ) {
 709                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 710                                 0, 0, 0 );
 711
 712                         slap_free_ctrls( op, op->o_ctrls );
 713                         op->o_ctrls = NULL;
 714                         rs->sr_err = SLAPD_DISCONNECT;
 715                         rs->sr_text = "decoding controls error";
 716                         goto return_results;
 717
 718                 } else if( c->ldctl_oid == NULL ) {
 719                         Debug( LDAP_DEBUG_TRACE,
 720                                 "get_ctrls: conn %lu got emtpy OID.\n",
 721                                 op->o_connid, 0, 0 );
 722
 723                         slap_free_ctrls( op, op->o_ctrls );
 724                         op->o_ctrls = NULL;
 725                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 726                         rs->sr_text = "OID field is empty";
 727                         goto return_results;
 728                 }
 729
 730                 tag = ber_peek_tag( ber, &len );
 731
 732                 if( tag == LBER_BOOLEAN ) {
 733                         ber_int_t crit;
 734                         tag = ber_scanf( ber, "b", &crit );
 735
 736                         if( tag == LBER_ERROR ) {
 737                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 738                                         0, 0, 0 );
 739                                 slap_free_ctrls( op, op->o_ctrls );
 740                                 op->o_ctrls = NULL;
 741                                 rs->sr_err = SLAPD_DISCONNECT;
 742                                 rs->sr_text = "decoding controls error";
 743                                 goto return_results;
 744                         }
 745
 746                         c->ldctl_iscritical = (crit != 0);
 747                         tag = ber_peek_tag( ber, &len );
 748                 }
 749
 750                 if( tag == LBER_OCTETSTRING ) {
 751                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 752
 753                         if( tag == LBER_ERROR ) {
 754                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 755                                         "%s (%scritical): get value failed.\n",
 756                                         op->o_connid, c->ldctl_oid,
 757                                         c->ldctl_iscritical ? "" : "non" );
 758                                 slap_free_ctrls( op, op->o_ctrls );
 759                                 op->o_ctrls = NULL;
 760                                 rs->sr_err = SLAPD_DISCONNECT;
 761                                 rs->sr_text = "decoding controls error";
 762                                 goto return_results;
 763                         }
 764                 }
 765
 766                 Debug( LDAP_DEBUG_TRACE,
 767                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 768                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 769
 770                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 771                 if ( rs->sr_err != LDAP_SUCCESS ) {
 772                         goto return_results;
 773                 }
 774         }
 775
 776 return_results:
 777         Debug( LDAP_DEBUG_TRACE,
 778                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 779                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 780
 781         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 782                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 783                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 784                         send_ldap_disconnect( op, rs );
 785                         rs->sr_err = SLAPD_DISCONNECT;
 786                 } else {
 787                         send_ldap_result( op, rs );
 788                 }
 789         }
 790
 791         return rs->sr_err;
 792 }
 793
 794 int
 795 slap_remove_control(
 796         Operation       *op,
 797         SlapReply       *rs,
 798         int             ctrl,
 799         BI_chk_controls fnc )
 800 {
 801         int             i, j;
 802
 803         switch ( op->o_ctrlflag[ ctrl ] ) {
 804         case SLAP_CONTROL_NONCRITICAL:
 805                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 806                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 807                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 808                         {
 809                                 j = i;
 810                         }
 811                 }
 812
 813                 if ( j == -1 ) {
 814                         rs->sr_err = LDAP_OTHER;
 815                         break;
 816                 }
 817
 818                 if ( fnc ) {
 819                         (void)fnc( op, rs );
 820                 }
 821
 822                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 823
 824                 if ( i > 1 ) {
 825                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 826                                 ( i - j ) * sizeof( LDAPControl * ) );
 827
 828                 } else {
 829                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 830                         op->o_ctrls = NULL;
 831                 }
 832
 833                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 834
 835                 Debug( LDAP_DEBUG_ANY, "%s: "
 836                         "non-critical control \"%s\" not supported; stripped.\n",
 837                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 838                 /* fall thru */
 839
 840         case SLAP_CONTROL_IGNORED:
 841         case SLAP_CONTROL_NONE:
 842                 rs->sr_err = SLAP_CB_CONTINUE;
 843                 break;
 844
 845         case SLAP_CONTROL_CRITICAL:
 846                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 847                 if ( fnc ) {
 848                         (void)fnc( op, rs );
 849                 }
 850                 Debug( LDAP_DEBUG_ANY, "%s: "
 851                         "critical control \"%s\" not supported.\n",
 852                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 853                 break;
 854
 855         default:
 856                 /* handle all cases! */
 857                 assert( 0 );
 858         }
 859
 860         return rs->sr_err;
 861 }
 862
 863 static int parseDontUseCopy (
 864         Operation *op,
 865         SlapReply *rs,
 866         LDAPControl *ctrl )
 867 {
 868         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 869                 rs->sr_text = "dontUseCopy control specified multiple times";
 870                 return LDAP_PROTOCOL_ERROR;
 871         }
 872
 873         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 874                 rs->sr_text = "dontUseCopy control value not absent";
 875                 return LDAP_PROTOCOL_ERROR;
 876         }
 877
 878         if ( !ctrl->ldctl_iscritical ) {
 879                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 880                 return LDAP_PROTOCOL_ERROR;
 881         }
 882
 883         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 884         return LDAP_SUCCESS;
 885 }
 886
 887 static int parseRelax (
 888         Operation *op,
 889         SlapReply *rs,
 890         LDAPControl *ctrl )
 891 {
 892         if ( op->o_relax != SLAP_CONTROL_NONE ) {
 893                 rs->sr_text = "relax control specified multiple times";
 894                 return LDAP_PROTOCOL_ERROR;
 895         }
 896
 897         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 898                 rs->sr_text = "relax control value not absent";
 899                 return LDAP_PROTOCOL_ERROR;
 900         }
 901
 902         op->o_relax = ctrl->ldctl_iscritical
 903                 ? SLAP_CONTROL_CRITICAL
 904                 : SLAP_CONTROL_NONCRITICAL;
 905
 906         return LDAP_SUCCESS;
 907 }
 908
 909 static int parseManageDSAit (
 910         Operation *op,
 911         SlapReply *rs,
 912         LDAPControl *ctrl )
 913 {
 914         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 915                 rs->sr_text = "manageDSAit control specified multiple times";
 916                 return LDAP_PROTOCOL_ERROR;
 917         }
 918
 919         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 920                 rs->sr_text = "manageDSAit control value not absent";
 921                 return LDAP_PROTOCOL_ERROR;
 922         }
 923
 924         op->o_managedsait = ctrl->ldctl_iscritical
 925                 ? SLAP_CONTROL_CRITICAL
 926                 : SLAP_CONTROL_NONCRITICAL;
 927
 928         return LDAP_SUCCESS;
 929 }
 930
 931 static int parseProxyAuthz (
 932         Operation *op,
 933         SlapReply *rs,
 934         LDAPControl *ctrl )
 935 {
 936         int             rc;
 937         struct berval   dn = BER_BVNULL;
 938
 939         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 940                 rs->sr_text = "proxy authorization control specified multiple times";
 941                 return LDAP_PROTOCOL_ERROR;
 942         }
 943
 944         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
 945                 rs->sr_text = "proxy authorization control value absent";
 946                 return LDAP_PROTOCOL_ERROR;
 947         }
 948
 949         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
 950                 && BER_BVISEMPTY( &op->o_ndn ) )
 951         {
 952                 rs->sr_text = "anonymous proxied authorization not allowed";
 953                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 954         }
 955
 956         op->o_proxy_authz = ctrl->ldctl_iscritical
 957                 ? SLAP_CONTROL_CRITICAL
 958                 : SLAP_CONTROL_NONCRITICAL;
 959
 960         Debug( LDAP_DEBUG_ARGS,
 961                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 962                 op->o_connid,
 963                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 964                 0 );
 965
 966         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
 967                 Debug( LDAP_DEBUG_TRACE,
 968                         "parseProxyAuthz: conn=%lu anonymous\n",
 969                         op->o_connid, 0, 0 );
 970
 971                 /* anonymous */
 972                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
 973                         op->o_ndn.bv_val[ 0 ] = '\0';
 974                 }
 975                 op->o_ndn.bv_len = 0;
 976
 977                 if ( !BER_BVISNULL( &op->o_dn ) ) {
 978                         op->o_dn.bv_val[ 0 ] = '\0';
 979                 }
 980                 op->o_dn.bv_len = 0;
 981
 982                 return LDAP_SUCCESS;
 983         }
 984
 985         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 986                         NULL, &dn, SLAP_GETDN_AUTHZID );
 987
 988         /* FIXME: empty DN in proxyAuthz control should be legal... */
 989         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 990                 if ( dn.bv_val ) {
 991                         ch_free( dn.bv_val );
 992                 }
 993                 rs->sr_text = "authzId mapping failed";
 994                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
 995         }
 996
 997         Debug( LDAP_DEBUG_TRACE,
 998                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 999                 op->o_connid,
1000                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
1001
1002         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
1003
1004         if ( rc ) {
1005                 ch_free( dn.bv_val );
1006                 rs->sr_text = "not authorized to assume identity";
1007                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
1008         }
1009
1010         ch_free( op->o_ndn.bv_val );
1011         ch_free( op->o_dn.bv_val );
1012
1013         /*
1014          * NOTE: since slap_sasl_getdn() returns a normalized dn,
1015          * from now on op->o_dn is normalized
1016          */
1017         op->o_ndn = dn;
1018         ber_dupbv( &op->o_dn, &dn );
1019
1020         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
1021             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
1022
1023         return LDAP_SUCCESS;
1024 }
1025
1026 static int parseNoOp (
1027         Operation *op,
1028         SlapReply *rs,
1029         LDAPControl *ctrl )
1030 {
1031         if ( op->o_noop != SLAP_CONTROL_NONE ) {
1032                 rs->sr_text = "noop control specified multiple times";
1033                 return LDAP_PROTOCOL_ERROR;
1034         }
1035
1036         if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
1037                 rs->sr_text = "noop control value not empty";
1038                 return LDAP_PROTOCOL_ERROR;
1039         }
1040
1041         if ( !ctrl->ldctl_iscritical ) {
1042                 rs->sr_text = "noop control not critical";
1043                 return LDAP_PROTOCOL_ERROR;
1044         }
1045
1046         switch ( op->o_tag ) {
1047         case LDAP_REQ_ADD:
1048         case LDAP_REQ_MODIFY:
1049         case LDAP_REQ_RENAME:
1050         case LDAP_REQ_DELETE:
1051         /* NOTE: only selected extended operations should be eligible;
1052          * checking is delegated to the appropriate handlers */
1053         case LDAP_REQ_EXTENDED:
1054                 break;
1055
1056         default:
1057                 rs->sr_text = "noop control on non-allowed operation";
1058                 return LDAP_PROTOCOL_ERROR;
1059         }
1060
1061         op->o_noop = ctrl->ldctl_iscritical
1062                 ? SLAP_CONTROL_CRITICAL
1063                 : SLAP_CONTROL_NONCRITICAL;
1064
1065         return LDAP_SUCCESS;
1066 }
1067
1068 static int parsePagedResults (
1069         Operation *op,
1070         SlapReply *rs,
1071         LDAPControl *ctrl )
1072 {
1073         BerElementBuffer berbuf;
1074         BerElement      *ber = (BerElement *)&berbuf;
1075         struct berval   cookie;
1076         PagedResultsState       *ps;
1077         int             rc = LDAP_SUCCESS;
1078         ber_tag_t       tag;
1079         ber_int_t       size;
1080
1081         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1082                 rs->sr_text = "paged results control specified multiple times";
1083                 return LDAP_PROTOCOL_ERROR;
1084         }
1085
1086         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1087                 rs->sr_text = "paged results control value is absent";
1088                 return LDAP_PROTOCOL_ERROR;
1089         }
1090
1091         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1092                 rs->sr_text = "paged results control value is empty";
1093                 return LDAP_PROTOCOL_ERROR;
1094         }
1095
1096         /* Parse the control value
1097          *      realSearchControlValue ::= SEQUENCE {
1098          *              size    INTEGER (0..maxInt),
1099          *                              -- requested page size from client
1100          *                              -- result set size estimate from server
1101          *              cookie  OCTET STRING
1102          * }
1103          */
1104         ber_init2( ber, &ctrl->ldctl_value, LBER_USE_DER );
1105
1106         tag = ber_scanf( ber, "{im}", &size, &cookie );
1107
1108         if ( tag == LBER_ERROR ) {
1109                 rs->sr_text = "paged results control could not be decoded";
1110                 rc = LDAP_PROTOCOL_ERROR;
1111                 goto done;
1112         }
1113
1114         if ( size < 0 ) {
1115                 rs->sr_text = "paged results control size invalid";
1116                 rc = LDAP_PROTOCOL_ERROR;
1117                 goto done;
1118         }
1119
1120         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1121         *ps = op->o_conn->c_pagedresults_state;
1122         ps->ps_size = size;
1123         ps->ps_cookieval = cookie;
1124         op->o_pagedresults_state = ps;
1125         if ( !cookie.bv_len ) {
1126                 ps->ps_count = 0;
1127                 ps->ps_cookie = 0;
1128         }
1129
1130         /* NOTE: according to RFC 2696 3.:
1131
1132     If the page size is greater than or equal to the sizeLimit value, the
1133     server should ignore the control as the request can be satisfied in a
1134     single page.
1135
1136          * NOTE: this assumes that the op->ors_slimit be set
1137          * before the controls are parsed.
1138          */
1139
1140         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1141                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1142
1143         } else if ( ctrl->ldctl_iscritical ) {
1144                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1145
1146         } else {
1147                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1148         }
1149
1150 done:;
1151         return rc;
1152 }
1153
1154 #ifdef SLAP_CONTROL_X_SORTEDRESULTS
1155 static int parseSortedResults (
1156         Operation *op,
1157         SlapReply *rs,
1158         LDAPControl *ctrl )
1159 {
1160         int             rc = LDAP_SUCCESS;
1161
1162         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1163                 rs->sr_text = "sorted results control specified multiple times";
1164                 return LDAP_PROTOCOL_ERROR;
1165         }
1166
1167         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1168                 rs->sr_text = "sorted results control value is absent";
1169                 return LDAP_PROTOCOL_ERROR;
1170         }
1171
1172         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1173                 rs->sr_text = "sorted results control value is empty";
1174                 return LDAP_PROTOCOL_ERROR;
1175         }
1176
1177         /* blow off parsing the value */
1178
1179         op->o_sortedresults = ctrl->ldctl_iscritical
1180                 ? SLAP_CONTROL_CRITICAL
1181                 : SLAP_CONTROL_NONCRITICAL;
1182
1183         return rc;
1184 }
1185 #endif
1186
1187 static int parseAssert (
1188         Operation *op,
1189         SlapReply *rs,
1190         LDAPControl *ctrl )
1191 {
1192         BerElement      *ber;
1193         struct berval   fstr = BER_BVNULL;
1194
1195         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1196                 rs->sr_text = "assert control specified multiple times";
1197                 return LDAP_PROTOCOL_ERROR;
1198         }
1199
1200         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1201                 rs->sr_text = "assert control value is absent";
1202                 return LDAP_PROTOCOL_ERROR;
1203         }
1204
1205         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1206                 rs->sr_text = "assert control value is empty";
1207                 return LDAP_PROTOCOL_ERROR;
1208         }
1209
1210         ber = ber_init( &(ctrl->ldctl_value) );
1211         if (ber == NULL) {
1212                 rs->sr_text = "assert control: internal error";
1213                 return LDAP_OTHER;
1214         }
1215
1216         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1217                 &rs->sr_text);
1218         (void) ber_free( ber, 1 );
1219         if( rs->sr_err != LDAP_SUCCESS ) {
1220                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1221                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1222                         send_ldap_disconnect( op, rs );
1223                         rs->sr_err = SLAPD_DISCONNECT;
1224                 } else {
1225                         send_ldap_result( op, rs );
1226                 }
1227                 if( op->o_assertion != NULL ) {
1228                         filter_free_x( op, op->o_assertion, 1 );
1229                 }
1230                 return rs->sr_err;
1231         }
1232
1233 #ifdef LDAP_DEBUG
1234         filter2bv_x( op, op->o_assertion, &fstr );
1235
1236         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1237                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1238         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1239 #endif
1240
1241         op->o_assert = ctrl->ldctl_iscritical
1242                 ? SLAP_CONTROL_CRITICAL
1243                 : SLAP_CONTROL_NONCRITICAL;
1244
1245         rs->sr_err = LDAP_SUCCESS;
1246         return LDAP_SUCCESS;
1247 }
1248
1249 #define READMSG(post, msg) \
1250         ( post ? "postread control: " msg : "preread control: " msg )
1251
1252 static int
1253 parseReadAttrs(
1254         Operation *op,
1255         SlapReply *rs,
1256         LDAPControl *ctrl,
1257         int post )
1258 {
1259         ber_len_t       siz, off, i;
1260         BerElement      *ber;
1261         AttributeName   *an = NULL;
1262
1263         if ( ( post && op->o_postread != SLAP_CONTROL_NONE ) ||
1264                 ( !post && op->o_preread != SLAP_CONTROL_NONE ) )
1265         {
1266                 rs->sr_text = READMSG( post, "specified multiple times" );
1267                 return LDAP_PROTOCOL_ERROR;
1268         }
1269
1270         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1271                 rs->sr_text = READMSG( post, "value is absent" );
1272                 return LDAP_PROTOCOL_ERROR;
1273         }
1274
1275         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1276                 rs->sr_text = READMSG( post, "value is empty" );
1277                 return LDAP_PROTOCOL_ERROR;
1278         }
1279
1280 #ifdef LDAP_X_TXN
1281         if ( op->o_txnSpec ) { /* temporary limitation */
1282                 rs->sr_text = READMSG( post, "cannot perform in transaction" );
1283                 return LDAP_UNWILLING_TO_PERFORM;
1284         }
1285 #endif
1286
1287         ber = ber_init( &ctrl->ldctl_value );
1288         if ( ber == NULL ) {
1289                 rs->sr_text = READMSG( post, "internal error" );
1290                 return LDAP_OTHER;
1291         }
1292
1293         rs->sr_err = LDAP_SUCCESS;
1294         siz = sizeof( AttributeName );
1295         off = offsetof( AttributeName, an_name );
1296         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1297                 rs->sr_text = READMSG( post, "decoding error" );
1298                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1299                 goto done;
1300         }
1301
1302         for ( i = 0; i < siz; i++ ) {
1303                 const char      *dummy = NULL;
1304                 int             rc;
1305
1306                 an[i].an_desc = NULL;
1307                 an[i].an_oc = NULL;
1308                 an[i].an_oc_exclude = 0;
1309                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1310                 if ( rc == LDAP_SUCCESS ) {
1311                         an[i].an_name = an[i].an_desc->ad_cname;
1312
1313                 } else {
1314                         int                     j;
1315                         static struct berval    special_attrs[] = {
1316                                 BER_BVC( LDAP_NO_ATTRS ),
1317                                 BER_BVC( LDAP_ALL_USER_ATTRIBUTES ),
1318                                 BER_BVC( LDAP_ALL_OPERATIONAL_ATTRIBUTES ),
1319                                 BER_BVNULL
1320                         };
1321
1322                         /* deal with special attribute types */
1323                         for ( j = 0; !BER_BVISNULL( &special_attrs[ j ] ); j++ ) {
1324                                 if ( bvmatch( &an[i].an_name, &special_attrs[ j ] ) ) {
1325                                         an[i].an_name = special_attrs[ j ];
1326                                         break;
1327                                 }
1328                         }
1329
1330                         if ( BER_BVISNULL( &special_attrs[ j ] ) && ctrl->ldctl_iscritical ) {
1331                                 rs->sr_err = rc;
1332                                 rs->sr_text = dummy ? dummy
1333                                         : READMSG( post, "unknown attributeType" );
1334                                 goto done;
1335                         }
1336                 }
1337         }
1338
1339         if ( post ) {
1340                 op->o_postread_attrs = an;
1341                 op->o_postread = ctrl->ldctl_iscritical
1342                         ? SLAP_CONTROL_CRITICAL
1343                         : SLAP_CONTROL_NONCRITICAL;
1344         } else {
1345                 op->o_preread_attrs = an;
1346                 op->o_preread = ctrl->ldctl_iscritical
1347                         ? SLAP_CONTROL_CRITICAL
1348                         : SLAP_CONTROL_NONCRITICAL;
1349         }
1350
1351 done:
1352         (void) ber_free( ber, 1 );
1353         return rs->sr_err;
1354 }
1355
1356 static int parsePreRead (
1357         Operation *op,
1358         SlapReply *rs,
1359         LDAPControl *ctrl )
1360 {
1361         return parseReadAttrs( op, rs, ctrl, 0 );
1362 }
1363
1364 static int parsePostRead (
1365         Operation *op,
1366         SlapReply *rs,
1367         LDAPControl *ctrl )
1368 {
1369         return parseReadAttrs( op, rs, ctrl, 1 );
1370 }
1371
1372 static int parseValuesReturnFilter (
1373         Operation *op,
1374         SlapReply *rs,
1375         LDAPControl *ctrl )
1376 {
1377         BerElement      *ber;
1378         struct berval   fstr = BER_BVNULL;
1379
1380         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1381                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1382                 return LDAP_PROTOCOL_ERROR;
1383         }
1384
1385         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1386                 rs->sr_text = "valuesReturnFilter control value is absent";
1387                 return LDAP_PROTOCOL_ERROR;
1388         }
1389
1390         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1391                 rs->sr_text = "valuesReturnFilter control value is empty";
1392                 return LDAP_PROTOCOL_ERROR;
1393         }
1394
1395         ber = ber_init( &(ctrl->ldctl_value) );
1396         if (ber == NULL) {
1397                 rs->sr_text = "internal error";
1398                 return LDAP_OTHER;
1399         }
1400
1401         rs->sr_err = get_vrFilter( op, ber,
1402                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1403
1404         (void) ber_free( ber, 1 );
1405
1406         if( rs->sr_err != LDAP_SUCCESS ) {
1407                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1408                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1409                         send_ldap_disconnect( op, rs );
1410                         rs->sr_err = SLAPD_DISCONNECT;
1411                 } else {
1412                         send_ldap_result( op, rs );
1413                 }
1414                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1415         }
1416 #ifdef LDAP_DEBUG
1417         else {
1418                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1419         }
1420
1421         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1422                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1423         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1424 #endif
1425
1426         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1427                 ? SLAP_CONTROL_CRITICAL
1428                 : SLAP_CONTROL_NONCRITICAL;
1429
1430         rs->sr_err = LDAP_SUCCESS;
1431         return LDAP_SUCCESS;
1432 }
1433
1434 static int parseSubentries (
1435         Operation *op,
1436         SlapReply *rs,
1437         LDAPControl *ctrl )
1438 {
1439         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1440                 rs->sr_text = "subentries control specified multiple times";
1441                 return LDAP_PROTOCOL_ERROR;
1442         }
1443
1444         /* FIXME: should use BER library */
1445         if( ( ctrl->ldctl_value.bv_len != 3 )
1446                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1447                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1448         {
1449                 rs->sr_text = "subentries control value encoding is bogus";
1450                 return LDAP_PROTOCOL_ERROR;
1451         }
1452
1453         op->o_subentries = ctrl->ldctl_iscritical
1454                 ? SLAP_CONTROL_CRITICAL
1455                 : SLAP_CONTROL_NONCRITICAL;
1456
1457         if (ctrl->ldctl_value.bv_val[2]) {
1458                 set_subentries_visibility( op );
1459         }
1460
1461         return LDAP_SUCCESS;
1462 }
1463
1464 static int parsePermissiveModify (
1465         Operation *op,
1466         SlapReply *rs,
1467         LDAPControl *ctrl )
1468 {
1469         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1470                 rs->sr_text = "permissiveModify control specified multiple times";
1471                 return LDAP_PROTOCOL_ERROR;
1472         }
1473
1474         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1475                 rs->sr_text = "permissiveModify control value not absent";
1476                 return LDAP_PROTOCOL_ERROR;
1477         }
1478
1479         op->o_permissive_modify = ctrl->ldctl_iscritical
1480                 ? SLAP_CONTROL_CRITICAL
1481                 : SLAP_CONTROL_NONCRITICAL;
1482
1483         return LDAP_SUCCESS;
1484 }
1485
1486 static int parseDomainScope (
1487         Operation *op,
1488         SlapReply *rs,
1489         LDAPControl *ctrl )
1490 {
1491         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1492                 rs->sr_text = "domainScope control specified multiple times";
1493                 return LDAP_PROTOCOL_ERROR;
1494         }
1495
1496         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1497                 rs->sr_text = "domainScope control value not empty";
1498                 return LDAP_PROTOCOL_ERROR;
1499         }
1500
1501         op->o_domain_scope = ctrl->ldctl_iscritical
1502                 ? SLAP_CONTROL_CRITICAL
1503                 : SLAP_CONTROL_NONCRITICAL;
1504
1505         return LDAP_SUCCESS;
1506 }
1507
1508 #ifdef SLAP_CONTROL_X_TREE_DELETE
1509 static int parseTreeDelete (
1510         Operation *op,
1511         SlapReply *rs,
1512         LDAPControl *ctrl )
1513 {
1514         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1515                 rs->sr_text = "treeDelete control specified multiple times";
1516                 return LDAP_PROTOCOL_ERROR;
1517         }
1518
1519         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
1520                 rs->sr_text = "treeDelete control value not absent";
1521                 return LDAP_PROTOCOL_ERROR;
1522         }
1523
1524         op->o_tree_delete = ctrl->ldctl_iscritical
1525                 ? SLAP_CONTROL_CRITICAL
1526                 : SLAP_CONTROL_NONCRITICAL;
1527
1528         return LDAP_SUCCESS;
1529 }
1530 #endif
1531
1532 static int parseSearchOptions (
1533         Operation *op,
1534         SlapReply *rs,
1535         LDAPControl *ctrl )
1536 {
1537         BerElement *ber;
1538         ber_int_t search_flags;
1539         ber_tag_t tag;
1540
1541         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1542                 rs->sr_text = "searchOptions control value is absent";
1543                 return LDAP_PROTOCOL_ERROR;
1544         }
1545
1546         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1547                 rs->sr_text = "searchOptions control value is empty";
1548                 return LDAP_PROTOCOL_ERROR;
1549         }
1550
1551         ber = ber_init( &ctrl->ldctl_value );
1552         if( ber == NULL ) {
1553                 rs->sr_text = "internal error";
1554                 return LDAP_OTHER;
1555         }
1556
1557         tag = ber_scanf( ber, "{i}", &search_flags );
1558         (void) ber_free( ber, 1 );
1559
1560         if ( tag == LBER_ERROR ) {
1561                 rs->sr_text = "searchOptions control decoding error";
1562                 return LDAP_PROTOCOL_ERROR;
1563         }
1564
1565         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1566                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1567                         rs->sr_text = "searchOptions control specified multiple times "
1568                                 "or with domainScope control";
1569                         return LDAP_PROTOCOL_ERROR;
1570                 }
1571
1572                 op->o_domain_scope = ctrl->ldctl_iscritical
1573                         ? SLAP_CONTROL_CRITICAL
1574                         : SLAP_CONTROL_NONCRITICAL;
1575         }
1576
1577         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1578                 /* Other search flags not recognised so far,
1579                  * including:
1580                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1581                  */
1582                 rs->sr_text = "searchOptions contained unrecognized flag";
1583                 return LDAP_UNWILLING_TO_PERFORM;
1584         }
1585
1586         return LDAP_SUCCESS;
1587 }
1588
1589 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1590 struct berval session_tracking_formats[] = {
1591         BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_SESSION_ID ),
1592                 BER_BVC( "RADIUS-Acct-Session-Id" ),
1593         BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_MULTI_SESSION_ID ),
1594                 BER_BVC( "RADIUS-Acct-Multi-Session-Id" ),
1595         BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME ),
1596                 BER_BVC( "USERNAME" ),
1597
1598         BER_BVNULL
1599 };
1600
1601 static int parseSessionTracking(
1602         Operation *op,
1603         SlapReply *rs,
1604         LDAPControl *ctrl )
1605 {
1606         BerElement              *ber;
1607         ber_tag_t               tag;
1608         ber_len_t               len;
1609         int                     i, rc;
1610
1611         struct berval           sessionSourceIp = BER_BVNULL,
1612                                 sessionSourceName = BER_BVNULL,
1613                                 formatOID = BER_BVNULL,
1614                                 sessionTrackingIdentifier = BER_BVNULL;
1615
1616         size_t                  st_len, st_pos;
1617
1618         if ( ctrl->ldctl_iscritical ) {
1619                 rs->sr_text = "sessionTracking criticality is TRUE";
1620                 return LDAP_PROTOCOL_ERROR;
1621         }
1622
1623         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1624                 rs->sr_text = "sessionTracking control value is absent";
1625                 return LDAP_PROTOCOL_ERROR;
1626         }
1627
1628         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1629                 rs->sr_text = "sessionTracking control value is empty";
1630                 return LDAP_PROTOCOL_ERROR;
1631         }
1632
1633         /* TODO: add the capability to determine if a client is allowed
1634          * to use this control, based on identity, ip and so */
1635
1636         ber = ber_init( &ctrl->ldctl_value );
1637         if ( ber == NULL ) {
1638                 rs->sr_text = "internal error";
1639                 return LDAP_OTHER;
1640         }
1641
1642         tag = ber_skip_tag( ber, &len );
1643         if ( tag != LBER_SEQUENCE ) {
1644                 tag = LBER_ERROR;
1645                 goto error;
1646         }
1647
1648         /* sessionSourceIp */
1649         tag = ber_peek_tag( ber, &len );
1650         if ( tag == LBER_DEFAULT ) {
1651                 tag = LBER_ERROR;
1652                 goto error;
1653         }
1654
1655         if ( len == 0 ) {
1656                 tag = ber_skip_tag( ber, &len );
1657
1658         } else if ( len > 128 ) {
1659                 rs->sr_text = "sessionTracking.sessionSourceIp too long";
1660                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1661                 goto error;
1662
1663         } else {
1664                 tag = ber_scanf( ber, "m", &sessionSourceIp );
1665         }
1666
1667         if ( ldif_is_not_printable( sessionSourceIp.bv_val, sessionSourceIp.bv_len ) ) {
1668                 BER_BVZERO( &sessionSourceIp );
1669         }
1670
1671         /* sessionSourceName */
1672         tag = ber_peek_tag( ber, &len );
1673         if ( tag == LBER_DEFAULT ) {
1674                 tag = LBER_ERROR;
1675                 goto error;
1676         }
1677
1678         if ( len == 0 ) {
1679                 tag = ber_skip_tag( ber, &len );
1680
1681         } else if ( len > 65536 ) {
1682                 rs->sr_text = "sessionTracking.sessionSourceName too long";
1683                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1684                 goto error;
1685
1686         } else {
1687                 tag = ber_scanf( ber, "m", &sessionSourceName );
1688         }
1689
1690         if ( ldif_is_not_printable( sessionSourceName.bv_val, sessionSourceName.bv_len ) ) {
1691                 BER_BVZERO( &sessionSourceName );
1692         }
1693
1694         /* formatOID */
1695         tag = ber_peek_tag( ber, &len );
1696         if ( tag == LBER_DEFAULT ) {
1697                 tag = LBER_ERROR;
1698                 goto error;
1699         }
1700
1701         if ( len == 0 ) {
1702                 rs->sr_text = "sessionTracking.formatOID empty";
1703                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1704                 goto error;
1705
1706         } else if ( len > 1024 ) {
1707                 rs->sr_text = "sessionTracking.formatOID too long";
1708                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1709                 goto error;
1710
1711         } else {
1712                 tag = ber_scanf( ber, "m", &formatOID );
1713         }
1714
1715         rc = numericoidValidate( NULL, &formatOID );
1716         if ( rc != LDAP_SUCCESS ) {
1717                 rs->sr_text = "sessionTracking.formatOID invalid";
1718                 goto error;
1719         }
1720
1721         for ( i = 0; !BER_BVISNULL( &session_tracking_formats[ i ] ); i += 2 )
1722         {
1723                 if ( bvmatch( &formatOID, &session_tracking_formats[ i ] ) ) {
1724                         formatOID = session_tracking_formats[ i + 1 ];
1725                         break;
1726                 }
1727         }
1728
1729         /* sessionTrackingIdentifier */
1730         tag = ber_peek_tag( ber, &len );
1731         if ( tag == LBER_DEFAULT ) {
1732                 tag = LBER_ERROR;
1733                 goto error;
1734         }
1735
1736         if ( len == 0 ) {
1737                 tag = ber_skip_tag( ber, &len );
1738
1739         } else {
1740                 /* note: should not be more than 65536... */
1741                 tag = ber_scanf( ber, "m", &sessionTrackingIdentifier );
1742                 if ( ldif_is_not_printable( sessionTrackingIdentifier.bv_val, sessionTrackingIdentifier.bv_len ) ) {
1743                         /* we want the OID printed, at least */
1744                         BER_BVSTR( &sessionTrackingIdentifier, "" );
1745                 }
1746         }
1747
1748         /* closure */
1749         tag = ber_skip_tag( ber, &len );
1750         if ( tag != LBER_DEFAULT || len != 0 ) {
1751                 tag = LBER_ERROR;
1752                 goto error;
1753         }
1754         tag = 0;
1755
1756         st_len = 0;
1757         if ( !BER_BVISNULL( &sessionSourceIp ) ) {
1758                 st_len += STRLENOF( "IP=" ) + sessionSourceIp.bv_len;
1759         }
1760         if ( !BER_BVISNULL( &sessionSourceName ) ) {
1761                 if ( st_len ) st_len++;
1762                 st_len += STRLENOF( "NAME=" ) + sessionSourceName.bv_len;
1763         }
1764         if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
1765                 if ( st_len ) st_len++;
1766                 st_len += formatOID.bv_len + STRLENOF( "=" )
1767                         + sessionTrackingIdentifier.bv_len;
1768         }
1769
1770         if ( st_len == 0 ) {
1771                 goto error;
1772         }
1773
1774         st_len += STRLENOF( " []" );
1775         st_pos = strlen( op->o_log_prefix );
1776
1777         if ( sizeof( op->o_log_prefix ) - st_pos > st_len ) {
1778                 char    *ptr = &op->o_log_prefix[ st_pos ];
1779
1780                 ptr = lutil_strcopy( ptr, " [" /*]*/ );
1781
1782                 st_len = 0;
1783                 if ( !BER_BVISNULL( &sessionSourceIp ) ) {
1784                         ptr = lutil_strcopy( ptr, "IP=" );
1785                         ptr = lutil_strcopy( ptr, sessionSourceIp.bv_val );
1786                         st_len++;
1787                 }
1788
1789                 if ( !BER_BVISNULL( &sessionSourceName ) ) {
1790                         if ( st_len ) *ptr++ = ' ';
1791                         ptr = lutil_strcopy( ptr, "NAME=" );
1792                         ptr = lutil_strcopy( ptr, sessionSourceName.bv_val );
1793                         st_len++;
1794                 }
1795
1796                 if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
1797                         if ( st_len ) *ptr++ = ' ';
1798                         ptr = lutil_strcopy( ptr, formatOID.bv_val );
1799                         *ptr++ = '=';
1800                         ptr = lutil_strcopy( ptr, sessionTrackingIdentifier.bv_val );
1801                 }
1802
1803                 *ptr++ = /*[*/ ']';
1804                 *ptr = '\0';
1805         }
1806
1807 error:;
1808         (void)ber_free( ber, 1 );
1809
1810         if ( tag == LBER_ERROR ) {
1811                 rs->sr_text = "sessionTracking control decoding error";
1812                 return LDAP_PROTOCOL_ERROR;
1813         }
1814
1815
1816         return rs->sr_err;
1817 }
1818
1819 int
1820 slap_ctrl_session_tracking_add(
1821         Operation *op,
1822         SlapReply *rs,
1823         struct berval *ip,
1824         struct berval *name,
1825         struct berval *id,
1826         LDAPControl *ctrl )
1827 {
1828         BerElementBuffer berbuf;
1829         BerElement      *ber = (BerElement *)&berbuf;
1830
1831         static struct berval    oid = BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME );
1832
1833         assert( ctrl != NULL );
1834
1835         ber_init2( ber, NULL, LBER_USE_DER );
1836
1837         ber_printf( ber, "{OOOO}", ip, name, &oid, id );
1838
1839         if ( ber_flatten2( ber, &ctrl->ldctl_value, 0 ) == -1 ) {
1840                 rs->sr_err = LDAP_OTHER;
1841                 goto done;
1842         }
1843
1844         ctrl->ldctl_oid = LDAP_CONTROL_X_SESSION_TRACKING;
1845         ctrl->ldctl_iscritical = 0;
1846
1847         rs->sr_err = LDAP_SUCCESS;
1848
1849 done:;
1850         return rs->sr_err;
1851 }
1852
1853 int
1854 slap_ctrl_session_tracking_request_add( Operation *op, SlapReply *rs, LDAPControl *ctrl )
1855 {
1856         static struct berval    bv_unknown = BER_BVC( SLAP_STRING_UNKNOWN );
1857         struct berval           ip = BER_BVNULL,
1858                                 name = BER_BVNULL,
1859                                 id = BER_BVNULL;
1860
1861         if ( !BER_BVISNULL( &op->o_conn->c_peer_name ) &&
1862                 memcmp( op->o_conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1863         {
1864                 char    *ptr;
1865
1866                 ip.bv_val = op->o_conn->c_peer_name.bv_val + STRLENOF( "IP=" );
1867                 ip.bv_len = op->o_conn->c_peer_name.bv_len - STRLENOF( "IP=" );
1868
1869                 ptr = ber_bvchr( &ip, ':' );
1870                 if ( ptr ) {
1871                         ip.bv_len = ptr - ip.bv_val;
1872                 }
1873         }
1874
1875         if ( !BER_BVISNULL( &op->o_conn->c_peer_domain ) &&
1876                 !bvmatch( &op->o_conn->c_peer_domain, &bv_unknown ) )
1877         {
1878                 name = op->o_conn->c_peer_domain;
1879         }
1880
1881         if ( !BER_BVISNULL( &op->o_dn ) && !BER_BVISEMPTY( &op->o_dn ) ) {
1882                 id = op->o_dn;
1883         }
1884
1885         return slap_ctrl_session_tracking_add( op, rs, &ip, &name, &id, ctrl );
1886 }
1887 #endif