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 #ifdef SLAP_CONTROL_X_WHATFAILED
  52 static SLAP_CTRL_PARSE_FN parseWhatFailed;
  53 #endif
  54
  55 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  56
  57 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  58 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  59
  60 struct slap_control_ids slap_cids;
  61
  62 struct slap_control {
  63         /* Control OID */
  64         char *sc_oid;
  65
  66         /* The controlID for this control */
  67         int sc_cid;
  68
  69         /* Operations supported by control */
  70         slap_mask_t sc_mask;
  71
  72         /* Extended operations supported by control */
  73         char **sc_extendedops;          /* input */
  74         BerVarray sc_extendedopsbv;     /* run-time use */
  75
  76         /* Control parsing callback */
  77         SLAP_CTRL_PARSE_FN *sc_parse;
  78
  79         LDAP_SLIST_ENTRY(slap_control) sc_next;
  80 };
  81
  82 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  83         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  84
  85 /*
  86  * all known request control OIDs should be added to this list
  87  */
  88 /*
  89  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  90  * addresses an undefined control; this allows to safely test for
  91  * well known controls even if they are not registered, e.g. if
  92  * they get moved to modules.  An example is sc_LDAPsync, which
  93  * is implemented in the syncprov overlay and thus, if configured
  94  * as dynamic module, may not be registered.  One side effect is that
  95  * slap_known_controls[0] == NULL, so it should always be used
  96  * starting from 1.
  97  * FIXME: should we define the "undefined control" oid?
  98  */
  99 char *slap_known_controls[SLAP_MAX_CIDS+1];
 100 static int num_known_controls = 1;
 101
 102 static char *proxy_authz_extops[] = {
 103         LDAP_EXOP_MODIFY_PASSWD,
 104         LDAP_EXOP_WHO_AM_I,
 105         LDAP_EXOP_REFRESH,
 106         NULL
 107 };
 108
 109 static char *manageDSAit_extops[] = {
 110         LDAP_EXOP_REFRESH,
 111         NULL
 112 };
 113
 114 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
 115 static char *session_tracking_extops[] = {
 116         LDAP_EXOP_MODIFY_PASSWD,
 117         LDAP_EXOP_WHO_AM_I,
 118         LDAP_EXOP_REFRESH,
 119         NULL
 120 };
 121 #endif
 122
 123 static struct slap_control control_defs[] = {
 124         {  LDAP_CONTROL_ASSERT,
 125                 (int)offsetof(struct slap_control_ids, sc_assert),
 126                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
 127                         SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
 128                 NULL, NULL,
 129                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 130         { LDAP_CONTROL_PRE_READ,
 131                 (int)offsetof(struct slap_control_ids, sc_preRead),
 132                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 133                 NULL, NULL,
 134                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 135         { LDAP_CONTROL_POST_READ,
 136                 (int)offsetof(struct slap_control_ids, sc_postRead),
 137                 SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 138                 NULL, NULL,
 139                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 140         { LDAP_CONTROL_VALUESRETURNFILTER,
 141                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 142                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH,
 143                 NULL, NULL,
 144                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 145         { LDAP_CONTROL_PAGEDRESULTS,
 146                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 147                 SLAP_CTRL_SEARCH,
 148                 NULL, NULL,
 149                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 150 #ifdef SLAP_CONTROL_X_SORTEDRESULTS
 151         { LDAP_CONTROL_SORTREQUEST,
 152                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 153                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 154                 NULL, NULL,
 155                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 156 #endif
 157         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 158                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 159                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 160                 NULL, NULL,
 161                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 162         { LDAP_CONTROL_DONTUSECOPY,
 163                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 164                 SLAP_CTRL_GLOBAL|SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
 165                 NULL, NULL,
 166                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 167         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 168                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 169                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
 170                 NULL, NULL,
 171                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 172 #ifdef SLAP_CONTROL_X_TREE_DELETE
 173         { LDAP_CONTROL_X_TREE_DELETE,
 174                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 175                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
 176                 NULL, NULL,
 177                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 178 #endif
 179         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 180                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 181                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 182                 NULL, NULL,
 183                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 184         { LDAP_CONTROL_SUBENTRIES,
 185                 (int)offsetof(struct slap_control_ids, sc_subentries),
 186                 SLAP_CTRL_SEARCH,
 187                 NULL, NULL,
 188                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 189         { LDAP_CONTROL_NOOP,
 190                 (int)offsetof(struct slap_control_ids, sc_noOp),
 191                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 192                 NULL, NULL,
 193                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 194         { LDAP_CONTROL_RELAX,
 195                 (int)offsetof(struct slap_control_ids, sc_relax),
 196                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 197                 NULL, NULL,
 198                 parseRelax, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 199 #ifdef LDAP_X_TXN
 200         { LDAP_CONTROL_X_TXN_SPEC,
 201                 (int)offsetof(struct slap_control_ids, sc_txnSpec),
 202                 SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 203                 NULL, NULL,
 204                 txn_spec_ctrl, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 205 #endif
 206         { LDAP_CONTROL_MANAGEDSAIT,
 207                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 208                 SLAP_CTRL_ACCESS,
 209                 manageDSAit_extops, NULL,
 210                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 211         { LDAP_CONTROL_PROXY_AUTHZ,
 212                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 213                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
 214                 proxy_authz_extops, NULL,
 215                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 216 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
 217         { LDAP_CONTROL_X_SESSION_TRACKING,
 218                 (int)offsetof(struct slap_control_ids, sc_sessionTracking),
 219                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS|SLAP_CTRL_BIND|SLAP_CTRL_HIDE,
 220                 session_tracking_extops, NULL,
 221                 parseSessionTracking, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 222 #endif
 223 #ifdef SLAP_CONTROL_X_WHATFAILED
 224         { LDAP_CONTROL_X_WHATFAILED,
 225                 (int)offsetof(struct slap_control_ids, sc_whatFailed),
 226                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 227                 NULL, NULL,
 228                 parseWhatFailed, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 229 #endif
 230
 231         { NULL, 0, 0, NULL, 0, NULL, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 232 };
 233
 234 static struct slap_control *
 235 find_ctrl( const char *oid );
 236
 237 /*
 238  * Register a supported control.
 239  *
 240  * This can be called by an OpenLDAP plugin or, indirectly, by a
 241  * SLAPI plugin calling slapi_register_supported_control().
 242  *
 243  * NOTE: if flags == 1 the control is replaced if already registered;
 244  * otherwise registering an already registered control is not allowed.
 245  */
 246 int
 247 register_supported_control2(const char *controloid,
 248         slap_mask_t controlmask,
 249         char **controlexops,
 250         SLAP_CTRL_PARSE_FN *controlparsefn,
 251         unsigned flags,
 252         int *controlcid)
 253 {
 254         struct slap_control *sc = NULL;
 255         int i;
 256         BerVarray extendedopsbv = NULL;
 257
 258         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 259                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 260                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 261                 SLAP_MAX_CIDS, 0, 0 );
 262                 return LDAP_OTHER;
 263         }
 264
 265         if ( controloid == NULL ) {
 266                 return LDAP_PARAM_ERROR;
 267         }
 268
 269         /* check if already registered */
 270         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 271                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 272                         if ( flags == 1 ) {
 273                                 Debug( LDAP_DEBUG_TRACE,
 274                                         "Control %s already registered; replacing.\n",
 275                                         controloid, 0, 0 );
 276                                 /* (find and) replace existing handler */
 277                                 sc = find_ctrl( controloid );
 278                                 assert( sc != NULL );
 279                                 break;
 280                         }
 281
 282                         Debug( LDAP_DEBUG_ANY,
 283                                 "Control %s already registered.\n",
 284                                 controloid, 0, 0 );
 285                         return LDAP_PARAM_ERROR;
 286                 }
 287         }
 288
 289         /* turn compatible extended operations into bervals */
 290         if ( controlexops != NULL ) {
 291                 int i;
 292
 293                 for ( i = 0; controlexops[ i ]; i++ );
 294
 295                 extendedopsbv = ber_memcalloc( i + 1, sizeof( struct berval ) );
 296                 if ( extendedopsbv == NULL ) {
 297                         return LDAP_NO_MEMORY;
 298                 }
 299
 300                 for ( i = 0; controlexops[ i ]; i++ ) {
 301                         ber_str2bv( controlexops[ i ], 0, 1, &extendedopsbv[ i ] );
 302                 }
 303         }
 304
 305         if ( sc == NULL ) {
 306                 sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 307                 if ( sc == NULL ) {
 308                         return LDAP_NO_MEMORY;
 309                 }
 310
 311                 sc->sc_oid = ch_strdup( controloid );
 312                 sc->sc_cid = num_known_controls;
 313
 314                 /* Update slap_known_controls, too. */
 315                 slap_known_controls[num_known_controls - 1] = sc->sc_oid;
 316                 slap_known_controls[num_known_controls++] = NULL;
 317
 318                 LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 319                 LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 320
 321         } else {
 322                 if ( sc->sc_extendedopsbv ) {
 323                         /* FIXME: in principle, we should rather merge
 324                          * existing extops with those supported by the
 325                          * new control handling implementation.
 326                          * In fact, whether a control is compatible with
 327                          * an extop should not be a matter of implementation.
 328                          * We likely also need a means for a newly
 329                          * registered extop to declare that it is
 330                          * comptible with an already registered control.
 331                          */
 332                         ber_bvarray_free( sc->sc_extendedopsbv );
 333                         sc->sc_extendedopsbv = NULL;
 334                         sc->sc_extendedops = NULL;
 335                 }
 336         }
 337
 338         sc->sc_extendedopsbv = extendedopsbv;
 339         sc->sc_mask = controlmask;
 340         sc->sc_parse = controlparsefn;
 341         if ( controlcid ) {
 342                 *controlcid = sc->sc_cid;
 343         }
 344
 345         return LDAP_SUCCESS;
 346 }
 347
 348 /*
 349  * One-time initialization of internal controls.
 350  */
 351 int
 352 slap_controls_init( void )
 353 {
 354         int i, rc;
 355
 356         rc = LDAP_SUCCESS;
 357
 358         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 359                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 360                 rc = register_supported_control( control_defs[i].sc_oid,
 361                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 362                         control_defs[i].sc_parse, cid );
 363                 if ( rc != LDAP_SUCCESS ) break;
 364         }
 365
 366         return rc;
 367 }
 368
 369 /*
 370  * Free memory associated with list of supported controls.
 371  */
 372 void
 373 controls_destroy( void )
 374 {
 375         struct slap_control *sc;
 376
 377         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 378                 sc = LDAP_SLIST_FIRST(&controls_list);
 379                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 380
 381                 ch_free( sc->sc_oid );
 382                 if ( sc->sc_extendedopsbv != NULL ) {
 383                         ber_bvarray_free( sc->sc_extendedopsbv );
 384                 }
 385                 ch_free( sc );
 386         }
 387 }
 388
 389 /*
 390  * Format the supportedControl attribute of the root DSE,
 391  * detailing which controls are supported by the directory
 392  * server.
 393  */
 394 int
 395 controls_root_dse_info( Entry *e )
 396 {
 397         AttributeDescription *ad_supportedControl
 398                 = slap_schema.si_ad_supportedControl;
 399         struct berval vals[2];
 400         struct slap_control *sc;
 401
 402         vals[1].bv_val = NULL;
 403         vals[1].bv_len = 0;
 404
 405         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 406                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 407
 408                 vals[0].bv_val = sc->sc_oid;
 409                 vals[0].bv_len = strlen( sc->sc_oid );
 410
 411                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 412                         return -1;
 413                 }
 414         }
 415
 416         return 0;
 417 }
 418
 419 /*
 420  * Return a list of OIDs and operation masks for supported
 421  * controls. Used by SLAPI.
 422  */
 423 int
 424 get_supported_controls(char ***ctrloidsp,
 425         slap_mask_t **ctrlmasks)
 426 {
 427         int n;
 428         char **oids;
 429         slap_mask_t *masks;
 430         struct slap_control *sc;
 431
 432         n = 0;
 433
 434         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 435                 n++;
 436         }
 437
 438         if ( n == 0 ) {
 439                 *ctrloidsp = NULL;
 440                 *ctrlmasks = NULL;
 441                 return LDAP_SUCCESS;
 442         }
 443
 444         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 445         if ( oids == NULL ) {
 446                 return LDAP_NO_MEMORY;
 447         }
 448         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 449         if  ( masks == NULL ) {
 450                 SLAP_FREE( oids );
 451                 return LDAP_NO_MEMORY;
 452         }
 453
 454         n = 0;
 455
 456         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 457                 oids[n] = ch_strdup( sc->sc_oid );
 458                 masks[n] = sc->sc_mask;
 459                 n++;
 460         }
 461         oids[n] = NULL;
 462         masks[n] = 0;
 463
 464         *ctrloidsp = oids;
 465         *ctrlmasks = masks;
 466
 467         return LDAP_SUCCESS;
 468 }
 469
 470 /*
 471  * Find a control given its OID.
 472  */
 473 static struct slap_control *
 474 find_ctrl( const char *oid )
 475 {
 476         struct slap_control *sc;
 477
 478         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 479                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 480                         return sc;
 481                 }
 482         }
 483
 484         return NULL;
 485 }
 486
 487 int
 488 slap_find_control_id(
 489         const char *oid,
 490         int *cid )
 491 {
 492         struct slap_control *ctrl = find_ctrl( oid );
 493         if ( ctrl ) {
 494                 if ( cid ) *cid = ctrl->sc_cid;
 495                 return LDAP_SUCCESS;
 496         }
 497         return LDAP_CONTROL_NOT_FOUND;
 498 }
 499
 500 int
 501 slap_global_control( Operation *op, const char *oid, int *cid )
 502 {
 503         struct slap_control *ctrl = find_ctrl( oid );
 504
 505         if ( ctrl == NULL ) {
 506                 /* should not be reachable */
 507                 Debug( LDAP_DEBUG_ANY,
 508                         "slap_global_control: unrecognized control: %s\n",
 509                         oid, 0, 0 );
 510                 return LDAP_CONTROL_NOT_FOUND;
 511         }
 512
 513         if ( cid ) *cid = ctrl->sc_cid;
 514
 515         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 516                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 517                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 518         {
 519                 return LDAP_COMPARE_TRUE;
 520         }
 521
 522 #if 0
 523         Debug( LDAP_DEBUG_TRACE,
 524                 "slap_global_control: unavailable control: %s\n",
 525                 oid, 0, 0 );
 526 #endif
 527
 528         return LDAP_COMPARE_FALSE;
 529 }
 530
 531 void slap_free_ctrls(
 532         Operation *op,
 533         LDAPControl **ctrls )
 534 {
 535         int i;
 536
 537         for (i=0; ctrls[i]; i++) {
 538                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 539         }
 540         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 541 }
 542
 543 int slap_parse_ctrl(
 544         Operation *op,
 545         SlapReply *rs,
 546         LDAPControl *control,
 547         const char **text )
 548 {
 549         struct slap_control *sc;
 550         int rc = LDAP_SUCCESS;
 551
 552         sc = find_ctrl( control->ldctl_oid );
 553         if( sc != NULL ) {
 554                 /* recognized control */
 555                 slap_mask_t tagmask;
 556                 switch( op->o_tag ) {
 557                 case LDAP_REQ_ADD:
 558                         tagmask = SLAP_CTRL_ADD;
 559                         break;
 560                 case LDAP_REQ_BIND:
 561                         tagmask = SLAP_CTRL_BIND;
 562                         break;
 563                 case LDAP_REQ_COMPARE:
 564                         tagmask = SLAP_CTRL_COMPARE;
 565                         break;
 566                 case LDAP_REQ_DELETE:
 567                         tagmask = SLAP_CTRL_DELETE;
 568                         break;
 569                 case LDAP_REQ_MODIFY:
 570                         tagmask = SLAP_CTRL_MODIFY;
 571                         break;
 572                 case LDAP_REQ_RENAME:
 573                         tagmask = SLAP_CTRL_RENAME;
 574                         break;
 575                 case LDAP_REQ_SEARCH:
 576                         tagmask = SLAP_CTRL_SEARCH;
 577                         break;
 578                 case LDAP_REQ_UNBIND:
 579                         tagmask = SLAP_CTRL_UNBIND;
 580                         break;
 581                 case LDAP_REQ_ABANDON:
 582                         tagmask = SLAP_CTRL_ABANDON;
 583                         break;
 584                 case LDAP_REQ_EXTENDED:
 585                         tagmask=~0L;
 586                         assert( op->ore_reqoid.bv_val != NULL );
 587                         if( sc->sc_extendedopsbv != NULL ) {
 588                                 int i;
 589                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 590                                         if( bvmatch( &op->ore_reqoid,
 591                                                 &sc->sc_extendedopsbv[i] ) )
 592                                         {
 593                                                 tagmask=0L;
 594                                                 break;
 595                                         }
 596                                 }
 597                         }
 598                         break;
 599                 default:
 600                         *text = "controls internal error";
 601                         return LDAP_OTHER;
 602                 }
 603
 604                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 605                         /* available extension */
 606                         if ( sc->sc_parse ) {
 607                                 rc = sc->sc_parse( op, rs, control );
 608                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 609
 610                         } else if ( control->ldctl_iscritical ) {
 611                                 *text = "not yet implemented";
 612                                 rc = LDAP_OTHER;
 613                         }
 614
 615
 616                 } else if ( control->ldctl_iscritical ) {
 617                         /* unavailable CRITICAL control */
 618                         *text = "critical extension is unavailable";
 619                         rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 620                 }
 621
 622         } else if ( control->ldctl_iscritical ) {
 623                 /* unrecognized CRITICAL control */
 624                 *text = "critical extension is not recognized";
 625                 rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 626         }
 627
 628         return rc;
 629 }
 630
 631 int get_ctrls(
 632         Operation *op,
 633         SlapReply *rs,
 634         int sendres )
 635 {
 636         int nctrls = 0;
 637         ber_tag_t tag;
 638         ber_len_t len;
 639         char *opaque;
 640         BerElement *ber = op->o_ber;
 641         struct berval bv;
 642 #ifdef SLAP_CONTROL_X_WHATFAILED
 643         /* NOTE: right now, slapd checks the validity of each control
 644          * while parsing.  As a consequence, it can only detect one
 645          * cause of failure at a time.  This results in returning
 646          * exactly one OID with the whatFailed control, or no control
 647          * at all.
 648          */
 649         char *failed_oid = NULL;
 650 #endif
 651
 652         len = ber_pvt_ber_remaining(ber);
 653
 654         if( len == 0) {
 655                 /* no controls */
 656                 rs->sr_err = LDAP_SUCCESS;
 657                 return rs->sr_err;
 658         }
 659
 660         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 661                 if( tag == LBER_ERROR ) {
 662                         rs->sr_err = SLAPD_DISCONNECT;
 663                         rs->sr_text = "unexpected data in PDU";
 664                 }
 665
 666                 goto return_results;
 667         }
 668
 669         Debug( LDAP_DEBUG_TRACE,
 670                 "=> get_ctrls\n", 0, 0, 0 );
 671
 672         if( op->o_protocol < LDAP_VERSION3 ) {
 673                 rs->sr_err = SLAPD_DISCONNECT;
 674                 rs->sr_text = "controls require LDAPv3";
 675                 goto return_results;
 676         }
 677
 678         /* one for first control, one for termination */
 679         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 680
 681 #if 0
 682         if( op->ctrls == NULL ) {
 683                 rs->sr_err = LDAP_NO_MEMORY;
 684                 rs->sr_text = "no memory";
 685                 goto return_results;
 686         }
 687 #endif
 688
 689         op->o_ctrls[nctrls] = NULL;
 690
 691         /* step through each element */
 692         for( tag = ber_first_element( ber, &len, &opaque );
 693                 tag != LBER_ERROR;
 694                 tag = ber_next_element( ber, &len, opaque ) )
 695         {
 696                 LDAPControl *c;
 697                 LDAPControl **tctrls;
 698
 699                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 700                 memset(c, 0, sizeof(LDAPControl));
 701
 702                 /* allocate pointer space for current controls (nctrls)
 703                  * + this control + extra NULL
 704                  */
 705                 tctrls = op->o_tmprealloc( op->o_ctrls,
 706                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 707
 708 #if 0
 709                 if( tctrls == NULL ) {
 710                         ch_free( c );
 711                         ldap_controls_free(op->o_ctrls);
 712                         op->o_ctrls = NULL;
 713
 714                         rs->sr_err = LDAP_NO_MEMORY;
 715                         rs->sr_text = "no memory";
 716                         goto return_results;
 717                 }
 718 #endif
 719                 op->o_ctrls = tctrls;
 720
 721                 op->o_ctrls[nctrls++] = c;
 722                 op->o_ctrls[nctrls] = NULL;
 723
 724                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 725                 c->ldctl_oid = bv.bv_val;
 726
 727                 if( tag == LBER_ERROR ) {
 728                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 729                                 0, 0, 0 );
 730
 731                         slap_free_ctrls( op, op->o_ctrls );
 732                         op->o_ctrls = NULL;
 733                         rs->sr_err = SLAPD_DISCONNECT;
 734                         rs->sr_text = "decoding controls error";
 735                         goto return_results;
 736
 737                 } else if( c->ldctl_oid == NULL ) {
 738                         Debug( LDAP_DEBUG_TRACE,
 739                                 "get_ctrls: conn %lu got emtpy OID.\n",
 740                                 op->o_connid, 0, 0 );
 741
 742                         slap_free_ctrls( op, op->o_ctrls );
 743                         op->o_ctrls = NULL;
 744                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 745                         rs->sr_text = "OID field is empty";
 746                         goto return_results;
 747                 }
 748
 749                 tag = ber_peek_tag( ber, &len );
 750
 751                 if( tag == LBER_BOOLEAN ) {
 752                         ber_int_t crit;
 753                         tag = ber_scanf( ber, "b", &crit );
 754
 755                         if( tag == LBER_ERROR ) {
 756                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 757                                         0, 0, 0 );
 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                         c->ldctl_iscritical = (crit != 0);
 766                         tag = ber_peek_tag( ber, &len );
 767                 }
 768
 769                 if( tag == LBER_OCTETSTRING ) {
 770                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 771
 772                         if( tag == LBER_ERROR ) {
 773                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 774                                         "%s (%scritical): get value failed.\n",
 775                                         op->o_connid, c->ldctl_oid,
 776                                         c->ldctl_iscritical ? "" : "non" );
 777                                 slap_free_ctrls( op, op->o_ctrls );
 778                                 op->o_ctrls = NULL;
 779                                 rs->sr_err = SLAPD_DISCONNECT;
 780                                 rs->sr_text = "decoding controls error";
 781                                 goto return_results;
 782                         }
 783                 }
 784
 785                 Debug( LDAP_DEBUG_TRACE,
 786                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 787                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 788
 789                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 790                 if ( rs->sr_err != LDAP_SUCCESS ) {
 791 #ifdef SLAP_CONTROL_X_WHATFAILED
 792                         failed_oid = c->ldctl_oid;
 793 #endif
 794                         goto return_results;
 795                 }
 796         }
 797
 798 return_results:
 799         Debug( LDAP_DEBUG_TRACE,
 800                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 801                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 802
 803         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 804                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 805                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 806                         send_ldap_disconnect( op, rs );
 807                         rs->sr_err = SLAPD_DISCONNECT;
 808                 } else {
 809 #ifdef SLAP_CONTROL_X_WHATFAILED
 810                         /* might have not been parsed yet? */
 811                         if ( failed_oid != NULL ) {
 812                                 if ( !get_whatFailed( op ) ) {
 813                                         /* look it up */
 814
 815                                         /* step through each remaining element */
 816                                         for ( ; tag != LBER_ERROR; tag = ber_next_element( ber, &len, opaque ) )
 817                                         {
 818                                                 LDAPControl c = { 0 };
 819
 820                                                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 821                                                 c.ldctl_oid = bv.bv_val;
 822
 823                                                 if ( tag == LBER_ERROR ) {
 824                                                         slap_free_ctrls( op, op->o_ctrls );
 825                                                         op->o_ctrls = NULL;
 826                                                         break;
 827
 828                                                 } else if ( c.ldctl_oid == NULL ) {
 829                                                         slap_free_ctrls( op, op->o_ctrls );
 830                                                         op->o_ctrls = NULL;
 831                                                         break;
 832                                                 }
 833
 834                                                 tag = ber_peek_tag( ber, &len );
 835                                                 if ( tag == LBER_BOOLEAN ) {
 836                                                         ber_int_t crit;
 837                                                         tag = ber_scanf( ber, "b", &crit );
 838                                                         if( tag == LBER_ERROR ) {
 839                                                                 slap_free_ctrls( op, op->o_ctrls );
 840                                                                 op->o_ctrls = NULL;
 841                                                                 break;
 842                                                         }
 843
 844                                                         tag = ber_peek_tag( ber, &len );
 845                                                 }
 846
 847                                                 if ( tag == LBER_OCTETSTRING ) {
 848                                                         tag = ber_scanf( ber, "m", &c.ldctl_value );
 849
 850                                                         if( tag == LBER_ERROR ) {
 851                                                                 slap_free_ctrls( op, op->o_ctrls );
 852                                                                 op->o_ctrls = NULL;
 853                                                                 break;
 854                                                         }
 855                                                 }
 856
 857                                                 if ( strcmp( c.ldctl_oid, LDAP_CONTROL_X_WHATFAILED ) == 0 ) {
 858                                                         const char *text;
 859                                                         slap_parse_ctrl( op, rs, &c, &text );
 860                                                         break;
 861                                                 }
 862                                         }
 863                                 }
 864
 865                                 if ( get_whatFailed( op ) ) {
 866                                         char *oids[ 2 ] = { failed_oid, NULL };
 867                                         slap_ctrl_whatFailed_add( op, rs, oids );
 868                                 }
 869                         }
 870 #endif
 871
 872                         send_ldap_result( op, rs );
 873                 }
 874         }
 875
 876         return rs->sr_err;
 877 }
 878
 879 int
 880 slap_remove_control(
 881         Operation       *op,
 882         SlapReply       *rs,
 883         int             ctrl,
 884         BI_chk_controls fnc )
 885 {
 886         int             i, j;
 887
 888         switch ( op->o_ctrlflag[ ctrl ] ) {
 889         case SLAP_CONTROL_NONCRITICAL:
 890                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 891                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 892                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 893                         {
 894                                 j = i;
 895                         }
 896                 }
 897
 898                 if ( j == -1 ) {
 899                         rs->sr_err = LDAP_OTHER;
 900                         break;
 901                 }
 902
 903                 if ( fnc ) {
 904                         (void)fnc( op, rs );
 905                 }
 906
 907                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 908
 909                 if ( i > 1 ) {
 910                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 911                                 ( i - j ) * sizeof( LDAPControl * ) );
 912
 913                 } else {
 914                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 915                         op->o_ctrls = NULL;
 916                 }
 917
 918                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 919
 920                 Debug( LDAP_DEBUG_ANY, "%s: "
 921                         "non-critical control \"%s\" not supported; stripped.\n",
 922                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 923                 /* fall thru */
 924
 925         case SLAP_CONTROL_IGNORED:
 926         case SLAP_CONTROL_NONE:
 927                 rs->sr_err = SLAP_CB_CONTINUE;
 928                 break;
 929
 930         case SLAP_CONTROL_CRITICAL:
 931                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 932                 if ( fnc ) {
 933                         (void)fnc( op, rs );
 934                 }
 935                 Debug( LDAP_DEBUG_ANY, "%s: "
 936                         "critical control \"%s\" not supported.\n",
 937                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 938                 break;
 939
 940         default:
 941                 /* handle all cases! */
 942                 assert( 0 );
 943         }
 944
 945         return rs->sr_err;
 946 }
 947
 948 static int parseDontUseCopy (
 949         Operation *op,
 950         SlapReply *rs,
 951         LDAPControl *ctrl )
 952 {
 953         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 954                 rs->sr_text = "dontUseCopy control specified multiple times";
 955                 return LDAP_PROTOCOL_ERROR;
 956         }
 957
 958         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 959                 rs->sr_text = "dontUseCopy control value not absent";
 960                 return LDAP_PROTOCOL_ERROR;
 961         }
 962
 963         op->o_dontUseCopy = ctrl->ldctl_iscritical
 964                 ? SLAP_CONTROL_CRITICAL
 965                 : SLAP_CONTROL_NONCRITICAL;
 966
 967         return LDAP_SUCCESS;
 968 }
 969
 970 static int parseRelax (
 971         Operation *op,
 972         SlapReply *rs,
 973         LDAPControl *ctrl )
 974 {
 975         if ( op->o_relax != SLAP_CONTROL_NONE ) {
 976                 rs->sr_text = "relax control specified multiple times";
 977                 return LDAP_PROTOCOL_ERROR;
 978         }
 979
 980         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
 981                 rs->sr_text = "relax control value not absent";
 982                 return LDAP_PROTOCOL_ERROR;
 983         }
 984
 985         op->o_relax = ctrl->ldctl_iscritical
 986                 ? SLAP_CONTROL_CRITICAL
 987                 : SLAP_CONTROL_NONCRITICAL;
 988
 989         return LDAP_SUCCESS;
 990 }
 991
 992 static int parseManageDSAit (
 993         Operation *op,
 994         SlapReply *rs,
 995         LDAPControl *ctrl )
 996 {
 997         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 998                 rs->sr_text = "manageDSAit control specified multiple times";
 999                 return LDAP_PROTOCOL_ERROR;
1000         }
1001
1002         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
1003                 rs->sr_text = "manageDSAit control value not absent";
1004                 return LDAP_PROTOCOL_ERROR;
1005         }
1006
1007         op->o_managedsait = ctrl->ldctl_iscritical
1008                 ? SLAP_CONTROL_CRITICAL
1009                 : SLAP_CONTROL_NONCRITICAL;
1010
1011         return LDAP_SUCCESS;
1012 }
1013
1014 static int parseProxyAuthz (
1015         Operation *op,
1016         SlapReply *rs,
1017         LDAPControl *ctrl )
1018 {
1019         int             rc;
1020         struct berval   dn = BER_BVNULL;
1021
1022         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
1023                 rs->sr_text = "proxy authorization control specified multiple times";
1024                 return LDAP_PROTOCOL_ERROR;
1025         }
1026
1027         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1028                 rs->sr_text = "proxy authorization control value absent";
1029                 return LDAP_PROTOCOL_ERROR;
1030         }
1031
1032         if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
1033                 && BER_BVISEMPTY( &op->o_ndn ) )
1034         {
1035                 rs->sr_text = "anonymous proxied authorization not allowed";
1036                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
1037         }
1038
1039         op->o_proxy_authz = ctrl->ldctl_iscritical
1040                 ? SLAP_CONTROL_CRITICAL
1041                 : SLAP_CONTROL_NONCRITICAL;
1042
1043         Debug( LDAP_DEBUG_ARGS,
1044                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
1045                 op->o_connid,
1046                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
1047                 0 );
1048
1049         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1050                 Debug( LDAP_DEBUG_TRACE,
1051                         "parseProxyAuthz: conn=%lu anonymous\n",
1052                         op->o_connid, 0, 0 );
1053
1054                 /* anonymous */
1055                 if ( !BER_BVISNULL( &op->o_ndn ) ) {
1056                         op->o_ndn.bv_val[ 0 ] = '\0';
1057                 }
1058                 op->o_ndn.bv_len = 0;
1059
1060                 if ( !BER_BVISNULL( &op->o_dn ) ) {
1061                         op->o_dn.bv_val[ 0 ] = '\0';
1062                 }
1063                 op->o_dn.bv_len = 0;
1064
1065                 return LDAP_SUCCESS;
1066         }
1067
1068         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
1069                         NULL, &dn, SLAP_GETDN_AUTHZID );
1070
1071         /* FIXME: empty DN in proxyAuthz control should be legal... */
1072         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
1073                 if ( dn.bv_val ) {
1074                         ch_free( dn.bv_val );
1075                 }
1076                 rs->sr_text = "authzId mapping failed";
1077                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
1078         }
1079
1080         Debug( LDAP_DEBUG_TRACE,
1081                 "parseProxyAuthz: conn=%lu \"%s\"\n",
1082                 op->o_connid,
1083                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
1084
1085         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
1086
1087         if ( rc ) {
1088                 ch_free( dn.bv_val );
1089                 rs->sr_text = "not authorized to assume identity";
1090                 return LDAP_PROXIED_AUTHORIZATION_DENIED;
1091         }
1092
1093         ch_free( op->o_ndn.bv_val );
1094         ch_free( op->o_dn.bv_val );
1095
1096         /*
1097          * NOTE: since slap_sasl_getdn() returns a normalized dn,
1098          * from now on op->o_dn is normalized
1099          */
1100         op->o_ndn = dn;
1101         ber_dupbv( &op->o_dn, &dn );
1102
1103         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
1104             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
1105
1106         return LDAP_SUCCESS;
1107 }
1108
1109 static int parseNoOp (
1110         Operation *op,
1111         SlapReply *rs,
1112         LDAPControl *ctrl )
1113 {
1114         if ( op->o_noop != SLAP_CONTROL_NONE ) {
1115                 rs->sr_text = "noop control specified multiple times";
1116                 return LDAP_PROTOCOL_ERROR;
1117         }
1118
1119         if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
1120                 rs->sr_text = "noop control value not empty";
1121                 return LDAP_PROTOCOL_ERROR;
1122         }
1123
1124         op->o_noop = ctrl->ldctl_iscritical
1125                 ? SLAP_CONTROL_CRITICAL
1126                 : SLAP_CONTROL_NONCRITICAL;
1127
1128         return LDAP_SUCCESS;
1129 }
1130
1131 static int parsePagedResults (
1132         Operation *op,
1133         SlapReply *rs,
1134         LDAPControl *ctrl )
1135 {
1136         BerElementBuffer berbuf;
1137         BerElement      *ber = (BerElement *)&berbuf;
1138         struct berval   cookie;
1139         PagedResultsState       *ps;
1140         int             rc = LDAP_SUCCESS;
1141         ber_tag_t       tag;
1142         ber_int_t       size;
1143
1144         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
1145                 rs->sr_text = "paged results control specified multiple times";
1146                 return LDAP_PROTOCOL_ERROR;
1147         }
1148
1149         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1150                 rs->sr_text = "paged results control value is absent";
1151                 return LDAP_PROTOCOL_ERROR;
1152         }
1153
1154         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1155                 rs->sr_text = "paged results control value is empty";
1156                 return LDAP_PROTOCOL_ERROR;
1157         }
1158
1159         /* Parse the control value
1160          *      realSearchControlValue ::= SEQUENCE {
1161          *              size    INTEGER (0..maxInt),
1162          *                              -- requested page size from client
1163          *                              -- result set size estimate from server
1164          *              cookie  OCTET STRING
1165          * }
1166          */
1167         ber_init2( ber, &ctrl->ldctl_value, LBER_USE_DER );
1168
1169         tag = ber_scanf( ber, "{im}", &size, &cookie );
1170
1171         if ( tag == LBER_ERROR ) {
1172                 rs->sr_text = "paged results control could not be decoded";
1173                 rc = LDAP_PROTOCOL_ERROR;
1174                 goto done;
1175         }
1176
1177         if ( size < 0 ) {
1178                 rs->sr_text = "paged results control size invalid";
1179                 rc = LDAP_PROTOCOL_ERROR;
1180                 goto done;
1181         }
1182
1183         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1184         *ps = op->o_conn->c_pagedresults_state;
1185         ps->ps_size = size;
1186         ps->ps_cookieval = cookie;
1187         op->o_pagedresults_state = ps;
1188         if ( !cookie.bv_len ) {
1189                 ps->ps_count = 0;
1190                 ps->ps_cookie = 0;
1191         }
1192
1193         /* NOTE: according to RFC 2696 3.:
1194
1195     If the page size is greater than or equal to the sizeLimit value, the
1196     server should ignore the control as the request can be satisfied in a
1197     single page.
1198
1199          * NOTE: this assumes that the op->ors_slimit be set
1200          * before the controls are parsed.
1201          */
1202
1203         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1204                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1205
1206         } else if ( ctrl->ldctl_iscritical ) {
1207                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1208
1209         } else {
1210                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1211         }
1212
1213 done:;
1214         return rc;
1215 }
1216
1217 #ifdef SLAP_CONTROL_X_SORTEDRESULTS
1218 static int parseSortedResults (
1219         Operation *op,
1220         SlapReply *rs,
1221         LDAPControl *ctrl )
1222 {
1223         int             rc = LDAP_SUCCESS;
1224
1225         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1226                 rs->sr_text = "sorted results control specified multiple times";
1227                 return LDAP_PROTOCOL_ERROR;
1228         }
1229
1230         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1231                 rs->sr_text = "sorted results control value is absent";
1232                 return LDAP_PROTOCOL_ERROR;
1233         }
1234
1235         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1236                 rs->sr_text = "sorted results control value is empty";
1237                 return LDAP_PROTOCOL_ERROR;
1238         }
1239
1240         /* blow off parsing the value */
1241
1242         op->o_sortedresults = ctrl->ldctl_iscritical
1243                 ? SLAP_CONTROL_CRITICAL
1244                 : SLAP_CONTROL_NONCRITICAL;
1245
1246         return rc;
1247 }
1248 #endif
1249
1250 static int parseAssert (
1251         Operation *op,
1252         SlapReply *rs,
1253         LDAPControl *ctrl )
1254 {
1255         BerElement      *ber;
1256         struct berval   fstr = BER_BVNULL;
1257
1258         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1259                 rs->sr_text = "assert control specified multiple times";
1260                 return LDAP_PROTOCOL_ERROR;
1261         }
1262
1263         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1264                 rs->sr_text = "assert control value is absent";
1265                 return LDAP_PROTOCOL_ERROR;
1266         }
1267
1268         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1269                 rs->sr_text = "assert control value is empty";
1270                 return LDAP_PROTOCOL_ERROR;
1271         }
1272
1273         ber = ber_init( &(ctrl->ldctl_value) );
1274         if (ber == NULL) {
1275                 rs->sr_text = "assert control: internal error";
1276                 return LDAP_OTHER;
1277         }
1278
1279         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1280                 &rs->sr_text);
1281         (void) ber_free( ber, 1 );
1282         if( rs->sr_err != LDAP_SUCCESS ) {
1283                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1284                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1285                         send_ldap_disconnect( op, rs );
1286                         rs->sr_err = SLAPD_DISCONNECT;
1287                 } else {
1288                         send_ldap_result( op, rs );
1289                 }
1290                 if( op->o_assertion != NULL ) {
1291                         filter_free_x( op, op->o_assertion, 1 );
1292                 }
1293                 return rs->sr_err;
1294         }
1295
1296 #ifdef LDAP_DEBUG
1297         filter2bv_x( op, op->o_assertion, &fstr );
1298
1299         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1300                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1301         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1302 #endif
1303
1304         op->o_assert = ctrl->ldctl_iscritical
1305                 ? SLAP_CONTROL_CRITICAL
1306                 : SLAP_CONTROL_NONCRITICAL;
1307
1308         rs->sr_err = LDAP_SUCCESS;
1309         return LDAP_SUCCESS;
1310 }
1311
1312 #define READMSG(post, msg) \
1313         ( post ? "postread control: " msg : "preread control: " msg )
1314
1315 static int
1316 parseReadAttrs(
1317         Operation *op,
1318         SlapReply *rs,
1319         LDAPControl *ctrl,
1320         int post )
1321 {
1322         ber_len_t       siz, off, i;
1323         BerElement      *ber;
1324         AttributeName   *an = NULL;
1325
1326         if ( ( post && op->o_postread != SLAP_CONTROL_NONE ) ||
1327                 ( !post && op->o_preread != SLAP_CONTROL_NONE ) )
1328         {
1329                 rs->sr_text = READMSG( post, "specified multiple times" );
1330                 return LDAP_PROTOCOL_ERROR;
1331         }
1332
1333         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1334                 rs->sr_text = READMSG( post, "value is absent" );
1335                 return LDAP_PROTOCOL_ERROR;
1336         }
1337
1338         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1339                 rs->sr_text = READMSG( post, "value is empty" );
1340                 return LDAP_PROTOCOL_ERROR;
1341         }
1342
1343 #ifdef LDAP_X_TXN
1344         if ( op->o_txnSpec ) { /* temporary limitation */
1345                 rs->sr_text = READMSG( post, "cannot perform in transaction" );
1346                 return LDAP_UNWILLING_TO_PERFORM;
1347         }
1348 #endif
1349
1350         ber = ber_init( &ctrl->ldctl_value );
1351         if ( ber == NULL ) {
1352                 rs->sr_text = READMSG( post, "internal error" );
1353                 return LDAP_OTHER;
1354         }
1355
1356         rs->sr_err = LDAP_SUCCESS;
1357         siz = sizeof( AttributeName );
1358         off = offsetof( AttributeName, an_name );
1359         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1360                 rs->sr_text = READMSG( post, "decoding error" );
1361                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1362                 goto done;
1363         }
1364
1365         for ( i = 0; i < siz; i++ ) {
1366                 const char      *dummy = NULL;
1367                 int             rc;
1368
1369                 an[i].an_desc = NULL;
1370                 an[i].an_oc = NULL;
1371                 an[i].an_oc_exclude = 0;
1372                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1373                 if ( rc == LDAP_SUCCESS ) {
1374                         an[i].an_name = an[i].an_desc->ad_cname;
1375
1376                 } else {
1377                         int                     j;
1378                         static struct berval    special_attrs[] = {
1379                                 BER_BVC( LDAP_NO_ATTRS ),
1380                                 BER_BVC( LDAP_ALL_USER_ATTRIBUTES ),
1381                                 BER_BVC( LDAP_ALL_OPERATIONAL_ATTRIBUTES ),
1382                                 BER_BVNULL
1383                         };
1384
1385                         /* deal with special attribute types */
1386                         for ( j = 0; !BER_BVISNULL( &special_attrs[ j ] ); j++ ) {
1387                                 if ( bvmatch( &an[i].an_name, &special_attrs[ j ] ) ) {
1388                                         an[i].an_name = special_attrs[ j ];
1389                                         break;
1390                                 }
1391                         }
1392
1393                         if ( BER_BVISNULL( &special_attrs[ j ] ) && ctrl->ldctl_iscritical ) {
1394                                 rs->sr_err = rc;
1395                                 rs->sr_text = dummy ? dummy
1396                                         : READMSG( post, "unknown attributeType" );
1397                                 goto done;
1398                         }
1399                 }
1400         }
1401
1402         if ( post ) {
1403                 op->o_postread_attrs = an;
1404                 op->o_postread = ctrl->ldctl_iscritical
1405                         ? SLAP_CONTROL_CRITICAL
1406                         : SLAP_CONTROL_NONCRITICAL;
1407         } else {
1408                 op->o_preread_attrs = an;
1409                 op->o_preread = ctrl->ldctl_iscritical
1410                         ? SLAP_CONTROL_CRITICAL
1411                         : SLAP_CONTROL_NONCRITICAL;
1412         }
1413
1414 done:
1415         (void) ber_free( ber, 1 );
1416         return rs->sr_err;
1417 }
1418
1419 static int parsePreRead (
1420         Operation *op,
1421         SlapReply *rs,
1422         LDAPControl *ctrl )
1423 {
1424         return parseReadAttrs( op, rs, ctrl, 0 );
1425 }
1426
1427 static int parsePostRead (
1428         Operation *op,
1429         SlapReply *rs,
1430         LDAPControl *ctrl )
1431 {
1432         return parseReadAttrs( op, rs, ctrl, 1 );
1433 }
1434
1435 static int parseValuesReturnFilter (
1436         Operation *op,
1437         SlapReply *rs,
1438         LDAPControl *ctrl )
1439 {
1440         BerElement      *ber;
1441         struct berval   fstr = BER_BVNULL;
1442
1443         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1444                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1445                 return LDAP_PROTOCOL_ERROR;
1446         }
1447
1448         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1449                 rs->sr_text = "valuesReturnFilter control value is absent";
1450                 return LDAP_PROTOCOL_ERROR;
1451         }
1452
1453         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1454                 rs->sr_text = "valuesReturnFilter control value is empty";
1455                 return LDAP_PROTOCOL_ERROR;
1456         }
1457
1458         ber = ber_init( &(ctrl->ldctl_value) );
1459         if (ber == NULL) {
1460                 rs->sr_text = "internal error";
1461                 return LDAP_OTHER;
1462         }
1463
1464         rs->sr_err = get_vrFilter( op, ber,
1465                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1466
1467         (void) ber_free( ber, 1 );
1468
1469         if( rs->sr_err != LDAP_SUCCESS ) {
1470                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1471                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1472                         send_ldap_disconnect( op, rs );
1473                         rs->sr_err = SLAPD_DISCONNECT;
1474                 } else {
1475                         send_ldap_result( op, rs );
1476                 }
1477                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1478         }
1479 #ifdef LDAP_DEBUG
1480         else {
1481                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1482         }
1483
1484         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1485                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1486         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1487 #endif
1488
1489         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1490                 ? SLAP_CONTROL_CRITICAL
1491                 : SLAP_CONTROL_NONCRITICAL;
1492
1493         rs->sr_err = LDAP_SUCCESS;
1494         return LDAP_SUCCESS;
1495 }
1496
1497 static int parseSubentries (
1498         Operation *op,
1499         SlapReply *rs,
1500         LDAPControl *ctrl )
1501 {
1502         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1503                 rs->sr_text = "subentries control specified multiple times";
1504                 return LDAP_PROTOCOL_ERROR;
1505         }
1506
1507         /* FIXME: should use BER library */
1508         if( ( ctrl->ldctl_value.bv_len != 3 )
1509                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1510                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1511         {
1512                 rs->sr_text = "subentries control value encoding is bogus";
1513                 return LDAP_PROTOCOL_ERROR;
1514         }
1515
1516         op->o_subentries = ctrl->ldctl_iscritical
1517                 ? SLAP_CONTROL_CRITICAL
1518                 : SLAP_CONTROL_NONCRITICAL;
1519
1520         if (ctrl->ldctl_value.bv_val[2]) {
1521                 set_subentries_visibility( op );
1522         }
1523
1524         return LDAP_SUCCESS;
1525 }
1526
1527 static int parsePermissiveModify (
1528         Operation *op,
1529         SlapReply *rs,
1530         LDAPControl *ctrl )
1531 {
1532         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1533                 rs->sr_text = "permissiveModify control specified multiple times";
1534                 return LDAP_PROTOCOL_ERROR;
1535         }
1536
1537         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1538                 rs->sr_text = "permissiveModify control value not absent";
1539                 return LDAP_PROTOCOL_ERROR;
1540         }
1541
1542         op->o_permissive_modify = ctrl->ldctl_iscritical
1543                 ? SLAP_CONTROL_CRITICAL
1544                 : SLAP_CONTROL_NONCRITICAL;
1545
1546         return LDAP_SUCCESS;
1547 }
1548
1549 static int parseDomainScope (
1550         Operation *op,
1551         SlapReply *rs,
1552         LDAPControl *ctrl )
1553 {
1554         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1555                 rs->sr_text = "domainScope control specified multiple times";
1556                 return LDAP_PROTOCOL_ERROR;
1557         }
1558
1559         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1560                 rs->sr_text = "domainScope control value not empty";
1561                 return LDAP_PROTOCOL_ERROR;
1562         }
1563
1564         op->o_domain_scope = ctrl->ldctl_iscritical
1565                 ? SLAP_CONTROL_CRITICAL
1566                 : SLAP_CONTROL_NONCRITICAL;
1567
1568         return LDAP_SUCCESS;
1569 }
1570
1571 #ifdef SLAP_CONTROL_X_TREE_DELETE
1572 static int parseTreeDelete (
1573         Operation *op,
1574         SlapReply *rs,
1575         LDAPControl *ctrl )
1576 {
1577         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1578                 rs->sr_text = "treeDelete control specified multiple times";
1579                 return LDAP_PROTOCOL_ERROR;
1580         }
1581
1582         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
1583                 rs->sr_text = "treeDelete control value not absent";
1584                 return LDAP_PROTOCOL_ERROR;
1585         }
1586
1587         op->o_tree_delete = ctrl->ldctl_iscritical
1588                 ? SLAP_CONTROL_CRITICAL
1589                 : SLAP_CONTROL_NONCRITICAL;
1590
1591         return LDAP_SUCCESS;
1592 }
1593 #endif
1594
1595 static int parseSearchOptions (
1596         Operation *op,
1597         SlapReply *rs,
1598         LDAPControl *ctrl )
1599 {
1600         BerElement *ber;
1601         ber_int_t search_flags;
1602         ber_tag_t tag;
1603
1604         if ( BER_BVISNULL( &ctrl->ldctl_value )) {
1605                 rs->sr_text = "searchOptions control value is absent";
1606                 return LDAP_PROTOCOL_ERROR;
1607         }
1608
1609         if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
1610                 rs->sr_text = "searchOptions control value is empty";
1611                 return LDAP_PROTOCOL_ERROR;
1612         }
1613
1614         ber = ber_init( &ctrl->ldctl_value );
1615         if( ber == NULL ) {
1616                 rs->sr_text = "internal error";
1617                 return LDAP_OTHER;
1618         }
1619
1620         tag = ber_scanf( ber, "{i}", &search_flags );
1621         (void) ber_free( ber, 1 );
1622
1623         if ( tag == LBER_ERROR ) {
1624                 rs->sr_text = "searchOptions control decoding error";
1625                 return LDAP_PROTOCOL_ERROR;
1626         }
1627
1628         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1629                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1630                         rs->sr_text = "searchOptions control specified multiple times "
1631                                 "or with domainScope control";
1632                         return LDAP_PROTOCOL_ERROR;
1633                 }
1634
1635                 op->o_domain_scope = ctrl->ldctl_iscritical
1636                         ? SLAP_CONTROL_CRITICAL
1637                         : SLAP_CONTROL_NONCRITICAL;
1638         }
1639
1640         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1641                 /* Other search flags not recognised so far,
1642                  * including:
1643                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1644                  */
1645                 rs->sr_text = "searchOptions contained unrecognized flag";
1646                 return LDAP_UNWILLING_TO_PERFORM;
1647         }
1648
1649         return LDAP_SUCCESS;
1650 }
1651
1652 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1653 struct berval session_tracking_formats[] = {
1654         BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_SESSION_ID ),
1655                 BER_BVC( "RADIUS-Acct-Session-Id" ),
1656         BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_MULTI_SESSION_ID ),
1657                 BER_BVC( "RADIUS-Acct-Multi-Session-Id" ),
1658         BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME ),
1659                 BER_BVC( "USERNAME" ),
1660
1661         BER_BVNULL
1662 };
1663
1664 static int parseSessionTracking(
1665         Operation *op,
1666         SlapReply *rs,
1667         LDAPControl *ctrl )
1668 {
1669         BerElement              *ber;
1670         ber_tag_t               tag;
1671         ber_len_t               len;
1672         int                     i, rc;
1673
1674         struct berval           sessionSourceIp = BER_BVNULL,
1675                                 sessionSourceName = BER_BVNULL,
1676                                 formatOID = BER_BVNULL,
1677                                 sessionTrackingIdentifier = BER_BVNULL;
1678
1679         size_t                  st_len, st_pos;
1680
1681         if ( ctrl->ldctl_iscritical ) {
1682                 rs->sr_text = "sessionTracking criticality is TRUE";
1683                 return LDAP_PROTOCOL_ERROR;
1684         }
1685
1686         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
1687                 rs->sr_text = "sessionTracking control value is absent";
1688                 return LDAP_PROTOCOL_ERROR;
1689         }
1690
1691         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1692                 rs->sr_text = "sessionTracking control value is empty";
1693                 return LDAP_PROTOCOL_ERROR;
1694         }
1695
1696         /* TODO: add the capability to determine if a client is allowed
1697          * to use this control, based on identity, ip and so */
1698
1699         ber = ber_init( &ctrl->ldctl_value );
1700         if ( ber == NULL ) {
1701                 rs->sr_text = "internal error";
1702                 return LDAP_OTHER;
1703         }
1704
1705         tag = ber_skip_tag( ber, &len );
1706         if ( tag != LBER_SEQUENCE ) {
1707                 tag = LBER_ERROR;
1708                 goto error;
1709         }
1710
1711         /* sessionSourceIp */
1712         tag = ber_peek_tag( ber, &len );
1713         if ( tag == LBER_DEFAULT ) {
1714                 tag = LBER_ERROR;
1715                 goto error;
1716         }
1717
1718         if ( len == 0 ) {
1719                 tag = ber_skip_tag( ber, &len );
1720
1721         } else if ( len > 128 ) {
1722                 rs->sr_text = "sessionTracking.sessionSourceIp too long";
1723                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1724                 goto error;
1725
1726         } else {
1727                 tag = ber_scanf( ber, "m", &sessionSourceIp );
1728         }
1729
1730         if ( ldif_is_not_printable( sessionSourceIp.bv_val, sessionSourceIp.bv_len ) ) {
1731                 BER_BVZERO( &sessionSourceIp );
1732         }
1733
1734         /* sessionSourceName */
1735         tag = ber_peek_tag( ber, &len );
1736         if ( tag == LBER_DEFAULT ) {
1737                 tag = LBER_ERROR;
1738                 goto error;
1739         }
1740
1741         if ( len == 0 ) {
1742                 tag = ber_skip_tag( ber, &len );
1743
1744         } else if ( len > 65536 ) {
1745                 rs->sr_text = "sessionTracking.sessionSourceName too long";
1746                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1747                 goto error;
1748
1749         } else {
1750                 tag = ber_scanf( ber, "m", &sessionSourceName );
1751         }
1752
1753         if ( ldif_is_not_printable( sessionSourceName.bv_val, sessionSourceName.bv_len ) ) {
1754                 BER_BVZERO( &sessionSourceName );
1755         }
1756
1757         /* formatOID */
1758         tag = ber_peek_tag( ber, &len );
1759         if ( tag == LBER_DEFAULT ) {
1760                 tag = LBER_ERROR;
1761                 goto error;
1762         }
1763
1764         if ( len == 0 ) {
1765                 rs->sr_text = "sessionTracking.formatOID empty";
1766                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1767                 goto error;
1768
1769         } else if ( len > 1024 ) {
1770                 rs->sr_text = "sessionTracking.formatOID too long";
1771                 rs->sr_err = LDAP_PROTOCOL_ERROR;
1772                 goto error;
1773
1774         } else {
1775                 tag = ber_scanf( ber, "m", &formatOID );
1776         }
1777
1778         rc = numericoidValidate( NULL, &formatOID );
1779         if ( rc != LDAP_SUCCESS ) {
1780                 rs->sr_text = "sessionTracking.formatOID invalid";
1781                 goto error;
1782         }
1783
1784         for ( i = 0; !BER_BVISNULL( &session_tracking_formats[ i ] ); i += 2 )
1785         {
1786                 if ( bvmatch( &formatOID, &session_tracking_formats[ i ] ) ) {
1787                         formatOID = session_tracking_formats[ i + 1 ];
1788                         break;
1789                 }
1790         }
1791
1792         /* sessionTrackingIdentifier */
1793         tag = ber_peek_tag( ber, &len );
1794         if ( tag == LBER_DEFAULT ) {
1795                 tag = LBER_ERROR;
1796                 goto error;
1797         }
1798
1799         if ( len == 0 ) {
1800                 tag = ber_skip_tag( ber, &len );
1801
1802         } else {
1803                 /* note: should not be more than 65536... */
1804                 tag = ber_scanf( ber, "m", &sessionTrackingIdentifier );
1805                 if ( ldif_is_not_printable( sessionTrackingIdentifier.bv_val, sessionTrackingIdentifier.bv_len ) ) {
1806                         /* we want the OID printed, at least */
1807                         BER_BVSTR( &sessionTrackingIdentifier, "" );
1808                 }
1809         }
1810
1811         /* closure */
1812         tag = ber_skip_tag( ber, &len );
1813         if ( tag != LBER_DEFAULT || len != 0 ) {
1814                 tag = LBER_ERROR;
1815                 goto error;
1816         }
1817         tag = 0;
1818
1819         st_len = 0;
1820         if ( !BER_BVISNULL( &sessionSourceIp ) ) {
1821                 st_len += STRLENOF( "IP=" ) + sessionSourceIp.bv_len;
1822         }
1823         if ( !BER_BVISNULL( &sessionSourceName ) ) {
1824                 if ( st_len ) st_len++;
1825                 st_len += STRLENOF( "NAME=" ) + sessionSourceName.bv_len;
1826         }
1827         if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
1828                 if ( st_len ) st_len++;
1829                 st_len += formatOID.bv_len + STRLENOF( "=" )
1830                         + sessionTrackingIdentifier.bv_len;
1831         }
1832
1833         if ( st_len == 0 ) {
1834                 goto error;
1835         }
1836
1837         st_len += STRLENOF( " []" );
1838         st_pos = strlen( op->o_log_prefix );
1839
1840         if ( sizeof( op->o_log_prefix ) - st_pos > st_len ) {
1841                 char    *ptr = &op->o_log_prefix[ st_pos ];
1842
1843                 ptr = lutil_strcopy( ptr, " [" /*]*/ );
1844
1845                 st_len = 0;
1846                 if ( !BER_BVISNULL( &sessionSourceIp ) ) {
1847                         ptr = lutil_strcopy( ptr, "IP=" );
1848                         ptr = lutil_strcopy( ptr, sessionSourceIp.bv_val );
1849                         st_len++;
1850                 }
1851
1852                 if ( !BER_BVISNULL( &sessionSourceName ) ) {
1853                         if ( st_len ) *ptr++ = ' ';
1854                         ptr = lutil_strcopy( ptr, "NAME=" );
1855                         ptr = lutil_strcopy( ptr, sessionSourceName.bv_val );
1856                         st_len++;
1857                 }
1858
1859                 if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
1860                         if ( st_len ) *ptr++ = ' ';
1861                         ptr = lutil_strcopy( ptr, formatOID.bv_val );
1862                         *ptr++ = '=';
1863                         ptr = lutil_strcopy( ptr, sessionTrackingIdentifier.bv_val );
1864                 }
1865
1866                 *ptr++ = /*[*/ ']';
1867                 *ptr = '\0';
1868         }
1869
1870 error:;
1871         (void)ber_free( ber, 1 );
1872
1873         if ( tag == LBER_ERROR ) {
1874                 rs->sr_text = "sessionTracking control decoding error";
1875                 return LDAP_PROTOCOL_ERROR;
1876         }
1877
1878
1879         return rs->sr_err;
1880 }
1881
1882 int
1883 slap_ctrl_session_tracking_add(
1884         Operation *op,
1885         SlapReply *rs,
1886         struct berval *ip,
1887         struct berval *name,
1888         struct berval *id,
1889         LDAPControl *ctrl )
1890 {
1891         BerElementBuffer berbuf;
1892         BerElement      *ber = (BerElement *)&berbuf;
1893
1894         static struct berval    oid = BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME );
1895
1896         assert( ctrl != NULL );
1897
1898         ber_init2( ber, NULL, LBER_USE_DER );
1899
1900         ber_printf( ber, "{OOOO}", ip, name, &oid, id );
1901
1902         if ( ber_flatten2( ber, &ctrl->ldctl_value, 0 ) == -1 ) {
1903                 rs->sr_err = LDAP_OTHER;
1904                 goto done;
1905         }
1906
1907         ctrl->ldctl_oid = LDAP_CONTROL_X_SESSION_TRACKING;
1908         ctrl->ldctl_iscritical = 0;
1909
1910         rs->sr_err = LDAP_SUCCESS;
1911
1912 done:;
1913         return rs->sr_err;
1914 }
1915
1916 int
1917 slap_ctrl_session_tracking_request_add( Operation *op, SlapReply *rs, LDAPControl *ctrl )
1918 {
1919         static struct berval    bv_unknown = BER_BVC( SLAP_STRING_UNKNOWN );
1920         struct berval           ip = BER_BVNULL,
1921                                 name = BER_BVNULL,
1922                                 id = BER_BVNULL;
1923
1924         if ( !BER_BVISNULL( &op->o_conn->c_peer_name ) &&
1925                 memcmp( op->o_conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1926         {
1927                 char    *ptr;
1928
1929                 ip.bv_val = op->o_conn->c_peer_name.bv_val + STRLENOF( "IP=" );
1930                 ip.bv_len = op->o_conn->c_peer_name.bv_len - STRLENOF( "IP=" );
1931
1932                 ptr = ber_bvchr( &ip, ':' );
1933                 if ( ptr ) {
1934                         ip.bv_len = ptr - ip.bv_val;
1935                 }
1936         }
1937
1938         if ( !BER_BVISNULL( &op->o_conn->c_peer_domain ) &&
1939                 !bvmatch( &op->o_conn->c_peer_domain, &bv_unknown ) )
1940         {
1941                 name = op->o_conn->c_peer_domain;
1942         }
1943
1944         if ( !BER_BVISNULL( &op->o_dn ) && !BER_BVISEMPTY( &op->o_dn ) ) {
1945                 id = op->o_dn;
1946         }
1947
1948         return slap_ctrl_session_tracking_add( op, rs, &ip, &name, &id, ctrl );
1949 }
1950 #endif
1951
1952 #ifdef SLAP_CONTROL_X_WHATFAILED
1953 static int parseWhatFailed(
1954         Operation *op,
1955         SlapReply *rs,
1956         LDAPControl *ctrl )
1957 {
1958         if ( op->o_whatFailed != SLAP_CONTROL_NONE ) {
1959                 rs->sr_text = "\"WHat Failed?\" control specified multiple times";
1960                 return LDAP_PROTOCOL_ERROR;
1961         }
1962
1963         if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
1964                 rs->sr_text = "\"What Failed?\" control value not absent";
1965                 return LDAP_PROTOCOL_ERROR;
1966         }
1967
1968         op->o_whatFailed = ctrl->ldctl_iscritical
1969                 ? SLAP_CONTROL_CRITICAL
1970                 : SLAP_CONTROL_NONCRITICAL;
1971
1972         return LDAP_SUCCESS;
1973 }
1974
1975 int
1976 slap_ctrl_whatFailed_add(
1977         Operation *op,
1978         SlapReply *rs,
1979         char **oids )
1980 {
1981         BerElementBuffer berbuf;
1982         BerElement *ber = (BerElement *) &berbuf;
1983         LDAPControl **ctrls = NULL;
1984         struct berval ctrlval;
1985         int i, rc = LDAP_SUCCESS;
1986
1987         ber_init2( ber, NULL, LBER_USE_DER );
1988         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1989         ber_printf( ber, "[" /*]*/ );
1990         for ( i = 0; oids[ i ] != NULL; i++ ) {
1991                 ber_printf( ber, "s", oids[ i ] );
1992         }
1993         ber_printf( ber, /*[*/ "]" );
1994
1995         if ( ber_flatten2( ber, &ctrlval, 0 ) == -1 ) {
1996                 rc = LDAP_OTHER;
1997                 goto done;
1998         }
1999
2000         i = 0;
2001         if ( rs->sr_ctrls != NULL ) {
2002                 for ( ; rs->sr_ctrls[ i ] != NULL; i++ ) {
2003                         if ( strcmp( rs->sr_ctrls[ i ]->ldctl_oid, LDAP_CONTROL_X_WHATFAILED ) != 0 ) {
2004                                 /* TODO: add */
2005                                 assert( 0 );
2006                         }
2007                 }
2008         }
2009
2010         ctrls = op->o_tmprealloc( rs->sr_ctrls,
2011                         sizeof(LDAPControl *)*( i + 2 )
2012                         + sizeof(LDAPControl)
2013                         + ctrlval.bv_len + 1,
2014                         op->o_tmpmemctx );
2015         if ( ctrls == NULL ) {
2016                 rc = LDAP_OTHER;
2017                 goto done;
2018         }
2019         ctrls[ i + 1 ] = NULL;
2020         ctrls[ i ] = (LDAPControl *)&ctrls[ i + 2 ];
2021         ctrls[ i ]->ldctl_oid = LDAP_CONTROL_X_WHATFAILED;
2022         ctrls[ i ]->ldctl_iscritical = 0;
2023         ctrls[ i ]->ldctl_value.bv_val = (char *)&ctrls[ i ][ 1 ];
2024         AC_MEMCPY( ctrls[ i ]->ldctl_value.bv_val, ctrlval.bv_val, ctrlval.bv_len + 1 );
2025         ctrls[ i ]->ldctl_value.bv_len = ctrlval.bv_len;
2026
2027         ber_free_buf( ber );
2028
2029         rs->sr_ctrls = ctrls;
2030
2031 done:;
2032         return rc;
2033 }
2034 #endif