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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1999-2002 The OpenLDAP Foundation.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms are permitted only
   7  * as authorized by the OpenLDAP Public License.  A copy of this
   8  * license is available at http://www.OpenLDAP.org/license.html or
   9  * in file LICENSE in the top-level directory of the distribution.
  10  */
  11 #include "portable.h"
  12
  13 #include <stdio.h>
  14
  15 #include <ac/string.h>
  16 #include <ac/socket.h>
  17
  18 #include "slap.h"
  19
  20 #include "../../libraries/liblber/lber-int.h"
  21
  22 #define SLAP_CTRL_FRONTEND                      0x80000000U
  23 #define SLAP_CTRL_FRONTEND_SEARCH       0x01000000U     /* for NOOP */
  24
  25 #define SLAP_CTRL_OPFLAGS                       0x0000FFFFU
  26 #define SLAP_CTRL_ABANDON                       0x00000001U
  27 #define SLAP_CTRL_ADD                           0x00002002U
  28 #define SLAP_CTRL_BIND                          0x00000004U
  29 #define SLAP_CTRL_COMPARE                       0x00001008U
  30 #define SLAP_CTRL_DELETE                        0x00002010U
  31 #define SLAP_CTRL_MODIFY                        0x00002020U
  32 #define SLAP_CTRL_RENAME                        0x00002040U
  33 #define SLAP_CTRL_SEARCH                        0x00001080U
  34 #define SLAP_CTRL_UNBIND                        0x00000100U
  35
  36 #define SLAP_CTRL_INTROGATE     (SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH)
  37 #define SLAP_CTRL_UPDATE \
  38         (SLAP_CTRL_ADD|SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME)
  39 #define SLAP_CTRL_ACCESS        (SLAP_CTRL_INTROGATE|SLAP_CTRL_UPDATE)
  40
  41 typedef int (SLAP_CTRL_PARSE_FN) LDAP_P((
  42         Connection *conn,
  43         Operation *op,
  44         LDAPControl *ctrl,
  45         const char **text ));
  46
  47 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  48 static SLAP_CTRL_PARSE_FN parseSubentries;
  49 static SLAP_CTRL_PARSE_FN parseNoOp;
  50 static SLAP_CTRL_PARSE_FN parsePagedResults;
  51 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  52
  53 #ifdef LDAP_CLIENT_UPDATE
  54 static SLAP_CTRL_PARSE_FN parseClientUpdate;
  55 #endif /* LDAP_CLIENT_UPDATE */
  56
  57 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  58
  59 static struct slap_control {
  60         char *sc_oid;
  61         slap_mask_t sc_mask;
  62         char **sc_extendedops;
  63         SLAP_CTRL_PARSE_FN *sc_parse;
  64
  65 } supportedControls[] = {
  66         { LDAP_CONTROL_MANAGEDSAIT,
  67                 SLAP_CTRL_ACCESS, NULL,
  68                 parseManageDSAit },
  69 #ifdef LDAP_CONTROL_SUBENTRIES
  70         { LDAP_CONTROL_SUBENTRIES,
  71                 SLAP_CTRL_SEARCH, NULL,
  72                 parseSubentries },
  73 #endif
  74 #ifdef LDAP_CONTROL_NOOP
  75         { LDAP_CONTROL_NOOP,
  76                 SLAP_CTRL_ACCESS, NULL,
  77                 parseNoOp },
  78 #endif
  79 #ifdef LDAP_CONTROL_PAGEDRESULTS_REQUEST
  80         { LDAP_CONTROL_PAGEDRESULTS_REQUEST,
  81                 SLAP_CTRL_SEARCH, NULL,
  82                 parsePagedResults },
  83 #endif
  84 #ifdef LDAP_CONTROL_VALUESRETURNFILTER
  85         { LDAP_CONTROL_VALUESRETURNFILTER,
  86                 SLAP_CTRL_SEARCH, NULL,
  87                 parseValuesReturnFilter },
  88 #endif
  89 #ifdef LDAP_CLIENT_UPDATE
  90         { LDAP_CONTROL_CLIENT_UPDATE,
  91                 SLAP_CTRL_SEARCH, NULL,
  92                 parseClientUpdate },
  93 #endif
  94         { NULL }
  95 };
  96
  97 char *
  98 get_supported_ctrl(int index)
  99 {
 100         return supportedControls[index].sc_oid;
 101 }
 102
 103 static struct slap_control *
 104 find_ctrl( const char *oid )
 105 {
 106         int i;
 107         for( i=0; supportedControls[i].sc_oid; i++ ) {
 108                 if( strcmp( oid, supportedControls[i].sc_oid ) == 0 ) {
 109                         return &supportedControls[i];
 110                 }
 111         }
 112         return NULL;
 113 }
 114
 115 int get_ctrls(
 116         Connection *conn,
 117         Operation *op,
 118         int sendres )
 119 {
 120         int nctrls = 0;
 121         ber_tag_t tag;
 122         ber_len_t len;
 123         char *opaque;
 124         BerElement *ber = op->o_ber;
 125         struct slap_control *sc;
 126         int rc = LDAP_SUCCESS;
 127         const char *errmsg = NULL;
 128
 129 #ifdef LDAP_CLIENT_UPDATE
 130         op->o_clientupdatetype = -1;
 131 #endif
 132
 133         len = ber_pvt_ber_remaining(ber);
 134
 135         if( len == 0) {
 136                 /* no controls */
 137                 rc = LDAP_SUCCESS;
 138                 return rc;
 139         }
 140
 141         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 142                 if( tag == LBER_ERROR ) {
 143                         rc = SLAPD_DISCONNECT;
 144                         errmsg = "unexpected data in PDU";
 145                 }
 146
 147                 goto return_results;
 148         }
 149
 150 #ifdef NEW_LOGGING
 151         LDAP_LOG( OPERATION, ENTRY, "get_ctrls: conn %lu\n", conn->c_connid, 0, 0 );
 152 #else
 153         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls\n", 0, 0, 0 );
 154 #endif
 155         if( op->o_protocol < LDAP_VERSION3 ) {
 156                 rc = SLAPD_DISCONNECT;
 157                 errmsg = "controls require LDAPv3";
 158                 goto return_results;
 159         }
 160
 161         /* one for first control, one for termination */
 162         op->o_ctrls = ch_malloc( 2 * sizeof(LDAPControl *) );
 163
 164 #if 0
 165         if( op->ctrls == NULL ) {
 166                 rc = LDAP_NO_MEMORY;
 167                 errmsg = "no memory";
 168                 goto return_results;
 169         }
 170 #endif
 171
 172         op->o_ctrls[nctrls] = NULL;
 173
 174         /* step through each element */
 175         for( tag = ber_first_element( ber, &len, &opaque );
 176                 tag != LBER_ERROR;
 177                 tag = ber_next_element( ber, &len, opaque ) )
 178         {
 179                 LDAPControl *c;
 180                 LDAPControl **tctrls;
 181
 182                 c = ch_calloc( 1, sizeof(LDAPControl) );
 183
 184 #if 0
 185                 if( c == NULL ) {
 186                         ldap_controls_free(op->o_ctrls);
 187                         op->o_ctrls = NULL;
 188
 189                         rc = LDAP_NO_MEMORY;
 190                         errmsg = "no memory";
 191                         goto return_results;
 192                 }
 193 #endif
 194
 195                 /* allocate pointer space for current controls (nctrls)
 196                  * + this control + extra NULL
 197                  */
 198                 tctrls = ch_realloc( op->o_ctrls,
 199                         (nctrls+2) * sizeof(LDAPControl *));
 200
 201 #if 0
 202                 if( tctrls == NULL ) {
 203                         ch_free( c );
 204                         ldap_controls_free(op->o_ctrls);
 205                         op->o_ctrls = NULL;
 206
 207                         rc = LDAP_NO_MEMORY;
 208                         errmsg = "no memory";
 209                         goto return_results;
 210                 }
 211 #endif
 212                 op->o_ctrls = tctrls;
 213
 214                 op->o_ctrls[nctrls++] = c;
 215                 op->o_ctrls[nctrls] = NULL;
 216
 217                 tag = ber_scanf( ber, "{a" /*}*/, &c->ldctl_oid );
 218
 219                 if( tag == LBER_ERROR ) {
 220 #ifdef NEW_LOGGING
 221                         LDAP_LOG( OPERATION, INFO, "get_ctrls: conn %lu get OID failed.\n",
 222                                 conn->c_connid, 0, 0 );
 223 #else
 224                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 225                                 0, 0, 0 );
 226 #endif
 227                         ldap_controls_free( op->o_ctrls );
 228                         op->o_ctrls = NULL;
 229                         rc = SLAPD_DISCONNECT;
 230                         errmsg = "decoding controls error";
 231                         goto return_results;
 232                 }
 233
 234                 tag = ber_peek_tag( ber, &len );
 235
 236                 if( tag == LBER_BOOLEAN ) {
 237                         ber_int_t crit;
 238                         tag = ber_scanf( ber, "b", &crit );
 239
 240                         if( tag == LBER_ERROR ) {
 241 #ifdef NEW_LOGGING
 242                                 LDAP_LOG( OPERATION, INFO,
 243                                         "get_ctrls: conn %lu get crit failed.\n",
 244                                         conn->c_connid, 0, 0 );
 245 #else
 246                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 247                                         0, 0, 0 );
 248 #endif
 249                                 ldap_controls_free( op->o_ctrls );
 250                                 op->o_ctrls = NULL;
 251                                 rc = SLAPD_DISCONNECT;
 252                                 errmsg = "decoding controls error";
 253                                 goto return_results;
 254                         }
 255
 256                         c->ldctl_iscritical = (crit != 0);
 257                         tag = ber_peek_tag( ber, &len );
 258                 }
 259
 260                 if( tag == LBER_OCTETSTRING ) {
 261                         tag = ber_scanf( ber, "o", &c->ldctl_value );
 262
 263                         if( tag == LBER_ERROR ) {
 264 #ifdef NEW_LOGGING
 265                                 LDAP_LOG( OPERATION, INFO, "get_ctrls: conn %lu: "
 266                                         "%s (%scritical): get value failed.\n",
 267                                         conn->c_connid, c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 268                                         c->ldctl_iscritical ? "" : "non" );
 269 #else
 270                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 271                                         "%s (%scritical): get value failed.\n",
 272                                         conn->c_connid,
 273                                         c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 274                                         c->ldctl_iscritical ? "" : "non" );
 275 #endif
 276                                 ldap_controls_free( op->o_ctrls );
 277                                 op->o_ctrls = NULL;
 278                                 rc = SLAPD_DISCONNECT;
 279                                 errmsg = "decoding controls error";
 280                                 goto return_results;
 281                         }
 282                 }
 283
 284 #ifdef NEW_LOGGING
 285                 LDAP_LOG( OPERATION, INFO,
 286                         "get_ctrls: conn %lu oid=\"%s\" (%scritical)\n",
 287                         conn->c_connid, c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 288                         c->ldctl_iscritical ? "" : "non" );
 289 #else
 290                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 291                         c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 292                         c->ldctl_iscritical ? "" : "non",
 293                         0 );
 294 #endif
 295
 296                 sc = find_ctrl( c->ldctl_oid );
 297                 if( sc != NULL ) {
 298                         /* recognized control */
 299                         slap_mask_t tagmask;
 300                         switch( op->o_tag ) {
 301                         case LDAP_REQ_ADD:
 302                                 tagmask = SLAP_CTRL_ADD;
 303                                 break;
 304                         case LDAP_REQ_BIND:
 305                                 tagmask = SLAP_CTRL_BIND;
 306                                 break;
 307                         case LDAP_REQ_COMPARE:
 308                                 tagmask = SLAP_CTRL_COMPARE;
 309                                 break;
 310                         case LDAP_REQ_DELETE:
 311                                 tagmask = SLAP_CTRL_DELETE;
 312                                 break;
 313                         case LDAP_REQ_MODIFY:
 314                                 tagmask = SLAP_CTRL_MODIFY;
 315                                 break;
 316                         case LDAP_REQ_RENAME:
 317                                 tagmask = SLAP_CTRL_RENAME;
 318                                 break;
 319                         case LDAP_REQ_SEARCH:
 320                                 tagmask = SLAP_CTRL_SEARCH;
 321                                 break;
 322                         case LDAP_REQ_UNBIND:
 323                                 tagmask = SLAP_CTRL_UNBIND;
 324                                 break;
 325                         case LDAP_REQ_EXTENDED:
 326                                 /* FIXME: check list of extended operations */
 327                                 tagmask = ~0U;
 328                                 break;
 329                         default:
 330                                 rc = LDAP_OTHER;
 331                                 errmsg = "controls internal error";
 332                                 goto return_results;
 333                         }
 334
 335                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 336                                 /* available extension */
 337
 338                                 if( !sc->sc_parse ) {
 339                                         rc = LDAP_OTHER;
 340                                         errmsg = "not yet implemented";
 341                                         goto return_results;
 342                                 }
 343
 344                                 rc = sc->sc_parse( conn, op, c, &errmsg );
 345
 346                                 if( rc != LDAP_SUCCESS ) goto return_results;
 347
 348                                 if ( sc->sc_mask & SLAP_CTRL_FRONTEND ) {
 349                                         /* kludge to disable backend_control() check */
 350                                         c->ldctl_iscritical = 0;
 351
 352                                 } else if ( tagmask == SLAP_CTRL_SEARCH &&
 353                                         sc->sc_mask & SLAP_CTRL_FRONTEND_SEARCH )
 354                                 {
 355                                         /* kludge to disable backend_control() check */
 356                                         c->ldctl_iscritical = 0;
 357                                 }
 358
 359                         } else if( c->ldctl_iscritical ) {
 360                                 /* unavailable CRITICAL control */
 361                                 rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 362                                 errmsg = "critical extension is unavailable";
 363                                 goto return_results;
 364                         }
 365
 366                 } else if( c->ldctl_iscritical ) {
 367                         /* unrecognized CRITICAL control */
 368                         rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 369                         errmsg = "critical extension is not recognized";
 370                         goto return_results;
 371                 }
 372         }
 373
 374 return_results:
 375 #ifdef NEW_LOGGING
 376         LDAP_LOG( OPERATION, RESULTS,
 377                 "get_ctrls: n=%d rc=%d err=%s\n", nctrls, rc, errmsg ? errmsg : "" );
 378 #else
 379         Debug( LDAP_DEBUG_TRACE, "<= get_ctrls: n=%d rc=%d err=%s\n",
 380                 nctrls, rc, errmsg ? errmsg : "");
 381 #endif
 382
 383         if( sendres && rc != LDAP_SUCCESS ) {
 384                 if( rc == SLAPD_DISCONNECT ) {
 385                         send_ldap_disconnect( conn, op, LDAP_PROTOCOL_ERROR, errmsg );
 386                 } else {
 387                         send_ldap_result( conn, op, rc,
 388                                 NULL, errmsg, NULL, NULL );
 389                 }
 390         }
 391
 392         return rc;
 393 }
 394
 395 static int parseManageDSAit (
 396         Connection *conn,
 397         Operation *op,
 398         LDAPControl *ctrl,
 399         const char **text )
 400 {
 401         if ( op->o_managedsait != SLAP_NO_CONTROL ) {
 402                 *text = "manageDSAit control specified multiple times";
 403                 return LDAP_PROTOCOL_ERROR;
 404         }
 405
 406         if ( ctrl->ldctl_value.bv_len ) {
 407                 *text = "manageDSAit control value not empty";
 408                 return LDAP_PROTOCOL_ERROR;
 409         }
 410
 411         op->o_managedsait = ctrl->ldctl_iscritical
 412                 ? SLAP_CRITICAL_CONTROL
 413                 : SLAP_NONCRITICAL_CONTROL;
 414
 415         return LDAP_SUCCESS;
 416 }
 417
 418 #ifdef LDAP_CONTROL_SUBENTRIES
 419 static int parseSubentries (
 420         Connection *conn,
 421         Operation *op,
 422         LDAPControl *ctrl,
 423         const char **text )
 424 {
 425         if ( op->o_subentries != SLAP_NO_CONTROL ) {
 426                 *text = "subentries control specified multiple times";
 427                 return LDAP_PROTOCOL_ERROR;
 428         }
 429
 430         /* FIXME: should use BER library */
 431         if( ( ctrl->ldctl_value.bv_len != 3 )
 432                 && ( ctrl->ldctl_value.bv_val[0] != 0x01 )
 433                 && ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
 434         {
 435                 *text = "subentries control value encoding is bogus";
 436                 return LDAP_PROTOCOL_ERROR;
 437         }
 438
 439         op->o_subentries = ctrl->ldctl_iscritical
 440                 ? SLAP_CRITICAL_CONTROL
 441                 : SLAP_NONCRITICAL_CONTROL;
 442
 443         op->o_subentries_visibility = (ctrl->ldctl_value.bv_val[2] != 0x00);
 444
 445         return LDAP_SUCCESS;
 446 }
 447 #endif
 448
 449 #ifdef LDAP_CONTROL_NOOP
 450 static int parseNoOp (
 451         Connection *conn,
 452         Operation *op,
 453         LDAPControl *ctrl,
 454         const char **text )
 455 {
 456         if ( op->o_noop != SLAP_NO_CONTROL ) {
 457                 *text = "noop control specified multiple times";
 458                 return LDAP_PROTOCOL_ERROR;
 459         }
 460
 461         if ( ctrl->ldctl_value.bv_len ) {
 462                 *text = "noop control value not empty";
 463                 return LDAP_PROTOCOL_ERROR;
 464         }
 465
 466         op->o_noop = ctrl->ldctl_iscritical
 467                 ? SLAP_CRITICAL_CONTROL
 468                 : SLAP_NONCRITICAL_CONTROL;
 469
 470         return LDAP_SUCCESS;
 471 }
 472 #endif
 473
 474 #ifdef LDAP_CONTROL_PAGEDRESULTS_REQUEST
 475 static int parsePagedResults (
 476         Connection *conn,
 477         Operation *op,
 478         LDAPControl *ctrl,
 479         const char **text )
 480 {
 481         ber_tag_t tag;
 482         ber_int_t size;
 483         BerElement *ber;
 484         struct berval cookie = { 0, NULL };
 485
 486         if ( op->o_pagedresults != SLAP_NO_CONTROL ) {
 487                 *text = "paged results control specified multiple times";
 488                 return LDAP_PROTOCOL_ERROR;
 489         }
 490
 491         if ( ctrl->ldctl_value.bv_len == 0 ) {
 492                 *text = "paged results control value is empty";
 493                 return LDAP_PROTOCOL_ERROR;
 494         }
 495
 496         /* Parse the control value
 497          *      realSearchControlValue ::= SEQUENCE {
 498          *              size    INTEGER (0..maxInt),
 499          *                              -- requested page size from client
 500          *                              -- result set size estimate from server
 501          *              cookie  OCTET STRING
 502          */
 503         ber = ber_init( &ctrl->ldctl_value );
 504         if( ber == NULL ) {
 505                 *text = "internal error";
 506                 return LDAP_OTHER;
 507         }
 508
 509         tag = ber_scanf( ber, "{im}", &size, &cookie );
 510         (void) ber_free( ber, 1 );
 511
 512         if( tag == LBER_ERROR ) {
 513                 *text = "paged results control could not be decoded";
 514                 return LDAP_PROTOCOL_ERROR;
 515         }
 516
 517         if( size <= 0 ) {
 518                 *text = "paged results control size invalid";
 519                 return LDAP_PROTOCOL_ERROR;
 520         }
 521
 522         if( cookie.bv_len ) {
 523                 PagedResultsCookie reqcookie;
 524                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 525                         /* bad cookie */
 526                         *text = "paged results cookie is invalid";
 527                         return LDAP_PROTOCOL_ERROR;
 528                 }
 529
 530                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 531
 532                 if( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 533                         /* bad cookie */
 534                         *text = "paged results cookie is invalid";
 535                         return LDAP_PROTOCOL_ERROR;
 536
 537                 } else if( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 538                         *text = "paged results cookie is invalid or old";
 539                         return LDAP_UNWILLING_TO_PERFORM;
 540                 }
 541         }
 542
 543         op->o_pagedresults_state.ps_cookie = op->o_opid;
 544         op->o_pagedresults_size = size;
 545
 546         op->o_pagedresults = ctrl->ldctl_iscritical
 547                 ? SLAP_CRITICAL_CONTROL
 548                 : SLAP_NONCRITICAL_CONTROL;
 549
 550         return LDAP_SUCCESS;
 551 }
 552 #endif
 553
 554 #ifdef LDAP_CONTROL_VALUESRETURNFILTER
 555 int parseValuesReturnFilter (
 556         Connection *conn,
 557         Operation *op,
 558         LDAPControl *ctrl,
 559         const char **text )
 560 {
 561         int             rc;
 562         BerElement      *ber;
 563         struct berval   fstr = { 0, NULL };
 564         const char *err_msg = "";
 565
 566         if ( op->o_valuesreturnfilter != SLAP_NO_CONTROL ) {
 567                 *text = "valuesreturnfilter control specified multiple times";
 568                 return LDAP_PROTOCOL_ERROR;
 569         }
 570
 571         ber = ber_init( &(ctrl->ldctl_value) );
 572         if (ber == NULL) {
 573                 *text = "internal error";
 574                 return LDAP_OTHER;
 575         }
 576
 577         rc = get_vrFilter( conn, ber, &(op->vrFilter), &err_msg);
 578
 579         if( rc != LDAP_SUCCESS ) {
 580                 text = &err_msg;
 581                 if( rc == SLAPD_DISCONNECT ) {
 582                         send_ldap_disconnect( conn, op,
 583                                 LDAP_PROTOCOL_ERROR, *text );
 584                 } else {
 585                         send_ldap_result( conn, op, rc,
 586                                 NULL, *text, NULL, NULL );
 587                 }
 588                 if( fstr.bv_val != NULL) free( fstr.bv_val );
 589                 if( op->vrFilter != NULL) vrFilter_free( op->vrFilter );
 590
 591         } else {
 592                 vrFilter2bv( op->vrFilter, &fstr );
 593         }
 594
 595 #ifdef NEW_LOGGING
 596         LDAP_LOG( OPERATION, ARGS,
 597                 "parseValuesReturnFilter: conn %d       vrFilter: %s\n",
 598                 conn->c_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
 599 #else
 600         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
 601                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
 602 #endif
 603
 604         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
 605                 ? SLAP_CRITICAL_CONTROL
 606                 : SLAP_NONCRITICAL_CONTROL;
 607
 608         return LDAP_SUCCESS;
 609 }
 610 #endif
 611
 612 #ifdef LDAP_CLIENT_UPDATE
 613 static int parseClientUpdate (
 614         Connection *conn,
 615         Operation *op,
 616         LDAPControl *ctrl,
 617         const char **text )
 618 {
 619         ber_tag_t tag;
 620         BerElement *ber;
 621         ber_int_t type;
 622         ber_int_t interval;
 623         ber_len_t len;
 624         struct berval scheme = { 0, NULL };
 625         struct berval cookie = { 0, NULL };
 626
 627         if ( op->o_noop != SLAP_NO_CONTROL ) {
 628                 *text = "LCUP client update control specified multiple times";
 629                 return LDAP_PROTOCOL_ERROR;
 630         }
 631
 632         if ( ctrl->ldctl_value.bv_len == 0 ) {
 633                 *text = "LCUP client update control value is empty";
 634                 return LDAP_PROTOCOL_ERROR;
 635         }
 636
 637         /* Parse the control value
 638          *      ClientUpdateControlValue ::= SEQUENCE {
 639          *              updateType      ENUMERATED {
 640          *                                      synchronizeOnly {0},
 641          *                                      synchronizeAndPersist {1},
 642          *                                      persistOnly {2} },
 643          *              sendCookieInterval INTEGER OPTIONAL,
 644          *              cookie          LCUPCookie OPTIONAL
 645          *      }
 646          */
 647
 648         ber = ber_init( &ctrl->ldctl_value );
 649         if( ber == NULL ) {
 650                 *text = "internal error";
 651                 return LDAP_OTHER;
 652         }
 653
 654         if ( (tag = ber_scanf( ber, "{i" /*}*/, &type )) == LBER_ERROR ) {
 655                 *text = "LCUP client update control : decoding error";
 656                 return LDAP_PROTOCOL_ERROR;
 657         }
 658
 659         if ( type != SYNCHRONIZE_ONLY &&
 660              type != SYNCHRONIZE_AND_PERSIST &&
 661              type != PERSIST_ONLY ) {
 662                 *text = "LCUP client update control : unknown update type";
 663                 return LDAP_PROTOCOL_ERROR;
 664         }
 665
 666         if ( (tag = ber_peek_tag( ber, &len )) == LBER_DEFAULT ) {
 667                 *text = "LCUP client update control : decoding error";
 668                 return LDAP_PROTOCOL_ERROR;
 669         }
 670
 671         if ( tag == LDAP_TAG_INTERVAL ) {
 672                 if ( (tag = ber_scanf( ber, "i", &interval )) == LBER_ERROR ) {
 673                         *text = "LCUP client update control : decoding error";
 674                         return LDAP_PROTOCOL_ERROR;
 675                 }
 676
 677                 if ( interval <= 0 ) {
 678                         /* server chooses interval */
 679                         interval = LDAP_LCUP_DEFAULT_SEND_COOKIE_INTERVAL;
 680                 }
 681         }
 682         else {
 683                 /* server chooses interval */
 684                 interval = LDAP_LCUP_DEFAULT_SEND_COOKIE_INTERVAL;
 685         }
 686
 687         if ( (tag = ber_peek_tag( ber, &len )) == LBER_DEFAULT ) {
 688                 *text = "LCUP client update control : decoding error";
 689                 return LDAP_PROTOCOL_ERROR;
 690         }
 691
 692         if ( tag == LDAP_TAG_COOKIE ) {
 693                 if ( (tag = ber_scanf( ber, /*{*/ "{mm}}",
 694                                         &scheme, &cookie )) == LBER_ERROR ) {
 695                         *text = "LCUP client update control : decoding error";
 696                         return LDAP_PROTOCOL_ERROR;
 697                 }
 698         }
 699
 700         /* TODO : Cookie Scheme Validation */
 701 #if 0
 702         if ( lcup_cookie_validate(scheme, cookie) != LDAP_SUCCESS ) {
 703                 *text = "Invalid LCUP cookie";
 704                 return LCUP_INVALID_COOKIE;
 705         }
 706
 707         if ( lcup_cookie_scheme_validate(scheme) != LDAP_SUCCESS ) {
 708                 *text = "Unsupported LCUP cookie scheme";
 709                 return LCUP_UNSUPPORTED_SCHEME;
 710         }
 711 #endif
 712
 713         op->o_clientupdatestate = ber_dupbv(NULL, &cookie);
 714
 715         (void) ber_free( ber, 1 );
 716
 717         op->o_clientupdatetype = type;
 718         op->o_clientupdateinterval = interval;
 719
 720         op->o_clientupdate = ctrl->ldctl_iscritical
 721                 ? SLAP_CRITICAL_CONTROL
 722                 : SLAP_NONCRITICAL_CONTROL;
 723
 724         return LDAP_SUCCESS;
 725 }
 726 #endif