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 parseProxyAuthz;
  48 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  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_CONTROL_SUBENTRIES
  54 static SLAP_CTRL_PARSE_FN parseSubentries;
  55 #endif
  56 #ifdef LDAP_CLIENT_UPDATE
  57 static SLAP_CTRL_PARSE_FN parseClientUpdate;
  58 #endif
  59
  60 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  61
  62 static char *proxy_authz_extops[] = {
  63         LDAP_EXOP_MODIFY_PASSWD,
  64         LDAP_EXOP_X_WHO_AM_I,
  65         NULL
  66 };
  67
  68 static struct slap_control {
  69         char *sc_oid;
  70         slap_mask_t sc_mask;
  71         char **sc_extendedops;
  72         SLAP_CTRL_PARSE_FN *sc_parse;
  73
  74 } supportedControls[] = {
  75         { LDAP_CONTROL_PROXY_AUTHZ,
  76                 SLAP_CTRL_FRONTEND|SLAP_CTRL_ACCESS, proxy_authz_extops,
  77                 parseProxyAuthz },
  78         { LDAP_CONTROL_MANAGEDSAIT,
  79                 SLAP_CTRL_ACCESS, NULL,
  80                 parseManageDSAit },
  81         { LDAP_CONTROL_NOOP,
  82                 SLAP_CTRL_ACCESS, NULL,
  83                 parseNoOp },
  84         { LDAP_CONTROL_PAGEDRESULTS,
  85                 SLAP_CTRL_SEARCH, NULL,
  86                 parsePagedResults },
  87         { LDAP_CONTROL_VALUESRETURNFILTER,
  88                 SLAP_CTRL_SEARCH, NULL,
  89                 parseValuesReturnFilter },
  90 #ifdef LDAP_CONTROL_SUBENTRIES
  91         { LDAP_CONTROL_SUBENTRIES,
  92                 SLAP_CTRL_SEARCH, NULL,
  93                 parseSubentries },
  94 #endif
  95 #ifdef LDAP_CLIENT_UPDATE
  96         { LDAP_CONTROL_CLIENT_UPDATE,
  97                 SLAP_CTRL_SEARCH, NULL,
  98                 parseClientUpdate },
  99 #endif /* LDAP_CLIENT_UPDATE */
 100         { NULL }
 101 };
 102
 103 char *
 104 get_supported_ctrl(int index)
 105 {
 106         return supportedControls[index].sc_oid;
 107 }
 108
 109 static struct slap_control *
 110 find_ctrl( const char *oid )
 111 {
 112         int i;
 113         for( i=0; supportedControls[i].sc_oid; i++ ) {
 114                 if( strcmp( oid, supportedControls[i].sc_oid ) == 0 ) {
 115                         return &supportedControls[i];
 116                 }
 117         }
 118         return NULL;
 119 }
 120
 121 int get_ctrls(
 122         Connection *conn,
 123         Operation *op,
 124         int sendres )
 125 {
 126         int nctrls = 0;
 127         ber_tag_t tag;
 128         ber_len_t len;
 129         char *opaque;
 130         BerElement *ber = op->o_ber;
 131         struct slap_control *sc;
 132         int rc = LDAP_SUCCESS;
 133         const char *errmsg = NULL;
 134
 135         len = ber_pvt_ber_remaining(ber);
 136
 137         if( len == 0) {
 138                 /* no controls */
 139                 rc = LDAP_SUCCESS;
 140                 return rc;
 141         }
 142
 143         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 144                 if( tag == LBER_ERROR ) {
 145                         rc = SLAPD_DISCONNECT;
 146                         errmsg = "unexpected data in PDU";
 147                 }
 148
 149                 goto return_results;
 150         }
 151
 152 #ifdef NEW_LOGGING
 153         LDAP_LOG( OPERATION, ENTRY, "get_ctrls: conn %lu\n", conn->c_connid, 0, 0 );
 154 #else
 155         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls\n", 0, 0, 0 );
 156 #endif
 157         if( op->o_protocol < LDAP_VERSION3 ) {
 158                 rc = SLAPD_DISCONNECT;
 159                 errmsg = "controls require LDAPv3";
 160                 goto return_results;
 161         }
 162
 163         /* one for first control, one for termination */
 164         op->o_ctrls = ch_malloc( 2 * sizeof(LDAPControl *) );
 165
 166 #if 0
 167         if( op->ctrls == NULL ) {
 168                 rc = LDAP_NO_MEMORY;
 169                 errmsg = "no memory";
 170                 goto return_results;
 171         }
 172 #endif
 173
 174         op->o_ctrls[nctrls] = NULL;
 175
 176         /* step through each element */
 177         for( tag = ber_first_element( ber, &len, &opaque );
 178                 tag != LBER_ERROR;
 179                 tag = ber_next_element( ber, &len, opaque ) )
 180         {
 181                 LDAPControl *c;
 182                 LDAPControl **tctrls;
 183
 184                 c = ch_calloc( 1, sizeof(LDAPControl) );
 185
 186 #if 0
 187                 if( c == NULL ) {
 188                         ldap_controls_free(op->o_ctrls);
 189                         op->o_ctrls = NULL;
 190
 191                         rc = LDAP_NO_MEMORY;
 192                         errmsg = "no memory";
 193                         goto return_results;
 194                 }
 195 #endif
 196
 197                 /* allocate pointer space for current controls (nctrls)
 198                  * + this control + extra NULL
 199                  */
 200                 tctrls = ch_realloc( op->o_ctrls,
 201                         (nctrls+2) * sizeof(LDAPControl *));
 202
 203 #if 0
 204                 if( tctrls == NULL ) {
 205                         ch_free( c );
 206                         ldap_controls_free(op->o_ctrls);
 207                         op->o_ctrls = NULL;
 208
 209                         rc = LDAP_NO_MEMORY;
 210                         errmsg = "no memory";
 211                         goto return_results;
 212                 }
 213 #endif
 214                 op->o_ctrls = tctrls;
 215
 216                 op->o_ctrls[nctrls++] = c;
 217                 op->o_ctrls[nctrls] = NULL;
 218
 219                 tag = ber_scanf( ber, "{a" /*}*/, &c->ldctl_oid );
 220
 221                 if( tag == LBER_ERROR ) {
 222 #ifdef NEW_LOGGING
 223                         LDAP_LOG( OPERATION, INFO, "get_ctrls: conn %lu get OID failed.\n",
 224                                 conn->c_connid, 0, 0 );
 225 #else
 226                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 227                                 0, 0, 0 );
 228 #endif
 229                         ldap_controls_free( op->o_ctrls );
 230                         op->o_ctrls = NULL;
 231                         rc = SLAPD_DISCONNECT;
 232                         errmsg = "decoding controls error";
 233                         goto return_results;
 234                 }
 235
 236                 tag = ber_peek_tag( ber, &len );
 237
 238                 if( tag == LBER_BOOLEAN ) {
 239                         ber_int_t crit;
 240                         tag = ber_scanf( ber, "b", &crit );
 241
 242                         if( tag == LBER_ERROR ) {
 243 #ifdef NEW_LOGGING
 244                                 LDAP_LOG( OPERATION, INFO,
 245                                         "get_ctrls: conn %lu get crit failed.\n",
 246                                         conn->c_connid, 0, 0 );
 247 #else
 248                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 249                                         0, 0, 0 );
 250 #endif
 251                                 ldap_controls_free( op->o_ctrls );
 252                                 op->o_ctrls = NULL;
 253                                 rc = SLAPD_DISCONNECT;
 254                                 errmsg = "decoding controls error";
 255                                 goto return_results;
 256                         }
 257
 258                         c->ldctl_iscritical = (crit != 0);
 259                         tag = ber_peek_tag( ber, &len );
 260                 }
 261
 262                 if( tag == LBER_OCTETSTRING ) {
 263                         tag = ber_scanf( ber, "o", &c->ldctl_value );
 264
 265                         if( tag == LBER_ERROR ) {
 266 #ifdef NEW_LOGGING
 267                                 LDAP_LOG( OPERATION, INFO, "get_ctrls: conn %lu: "
 268                                         "%s (%scritical): get value failed.\n",
 269                                         conn->c_connid, c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 270                                         c->ldctl_iscritical ? "" : "non" );
 271 #else
 272                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 273                                         "%s (%scritical): get value failed.\n",
 274                                         conn->c_connid,
 275                                         c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 276                                         c->ldctl_iscritical ? "" : "non" );
 277 #endif
 278                                 ldap_controls_free( op->o_ctrls );
 279                                 op->o_ctrls = NULL;
 280                                 rc = SLAPD_DISCONNECT;
 281                                 errmsg = "decoding controls error";
 282                                 goto return_results;
 283                         }
 284                 }
 285
 286 #ifdef NEW_LOGGING
 287                 LDAP_LOG( OPERATION, INFO,
 288                         "get_ctrls: conn %lu oid=\"%s\" (%scritical)\n",
 289                         conn->c_connid, c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 290                         c->ldctl_iscritical ? "" : "non" );
 291 #else
 292                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 293                         c->ldctl_oid ? c->ldctl_oid : "(NULL)",
 294                         c->ldctl_iscritical ? "" : "non",
 295                         0 );
 296 #endif
 297
 298                 sc = find_ctrl( c->ldctl_oid );
 299                 if( sc != NULL ) {
 300                         /* recognized control */
 301                         slap_mask_t tagmask;
 302                         switch( op->o_tag ) {
 303                         case LDAP_REQ_ADD:
 304                                 tagmask = SLAP_CTRL_ADD;
 305                                 break;
 306                         case LDAP_REQ_BIND:
 307                                 tagmask = SLAP_CTRL_BIND;
 308                                 break;
 309                         case LDAP_REQ_COMPARE:
 310                                 tagmask = SLAP_CTRL_COMPARE;
 311                                 break;
 312                         case LDAP_REQ_DELETE:
 313                                 tagmask = SLAP_CTRL_DELETE;
 314                                 break;
 315                         case LDAP_REQ_MODIFY:
 316                                 tagmask = SLAP_CTRL_MODIFY;
 317                                 break;
 318                         case LDAP_REQ_RENAME:
 319                                 tagmask = SLAP_CTRL_RENAME;
 320                                 break;
 321                         case LDAP_REQ_SEARCH:
 322                                 tagmask = SLAP_CTRL_SEARCH;
 323                                 break;
 324                         case LDAP_REQ_UNBIND:
 325                                 tagmask = SLAP_CTRL_UNBIND;
 326                                 break;
 327                         case LDAP_REQ_ABANDON:
 328                                 tagmask = SLAP_CTRL_ABANDON;
 329                                 break;
 330                         case LDAP_REQ_EXTENDED:
 331                                 tagmask=~0L;
 332                                 assert( op->o_extendedop != NULL );
 333                                 if( sc->sc_extendedops != NULL ) {
 334                                         int i;
 335                                         for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 336                                                 if( strcmp( op->o_extendedop, sc->sc_extendedops[i] )
 337                                                         == 0 )
 338                                                 {
 339                                                         tagmask=0L;
 340                                                         break;
 341                                                 }
 342                                         }
 343                                 }
 344                                 break;
 345                         default:
 346                                 rc = LDAP_OTHER;
 347                                 errmsg = "controls internal error";
 348                                 goto return_results;
 349                         }
 350
 351                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 352                                 /* available extension */
 353
 354                                 if( !sc->sc_parse ) {
 355                                         rc = LDAP_OTHER;
 356                                         errmsg = "not yet implemented";
 357                                         goto return_results;
 358                                 }
 359
 360                                 rc = sc->sc_parse( conn, op, c, &errmsg );
 361
 362                                 if( rc != LDAP_SUCCESS ) goto return_results;
 363
 364                                 if ( sc->sc_mask & SLAP_CTRL_FRONTEND ) {
 365                                         /* kludge to disable backend_control() check */
 366                                         c->ldctl_iscritical = 0;
 367
 368                                 } else if ( tagmask == SLAP_CTRL_SEARCH &&
 369                                         sc->sc_mask & SLAP_CTRL_FRONTEND_SEARCH )
 370                                 {
 371                                         /* kludge to disable backend_control() check */
 372                                         c->ldctl_iscritical = 0;
 373                                 }
 374
 375                         } else if( c->ldctl_iscritical ) {
 376                                 /* unavailable CRITICAL control */
 377                                 rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 378                                 errmsg = "critical extension is unavailable";
 379                                 goto return_results;
 380                         }
 381
 382                 } else if( c->ldctl_iscritical ) {
 383                         /* unrecognized CRITICAL control */
 384                         rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 385                         errmsg = "critical extension is not recognized";
 386                         goto return_results;
 387                 }
 388         }
 389
 390 return_results:
 391 #ifdef NEW_LOGGING
 392         LDAP_LOG( OPERATION, RESULTS,
 393                 "get_ctrls: n=%d rc=%d err=\"%s\"\n",
 394                 nctrls, rc, errmsg ? errmsg : "" );
 395 #else
 396         Debug( LDAP_DEBUG_TRACE,
 397                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 398                 nctrls, rc, errmsg ? errmsg : "");
 399 #endif
 400
 401         if( sendres && rc != LDAP_SUCCESS ) {
 402                 if( rc == SLAPD_DISCONNECT ) {
 403                         send_ldap_disconnect( conn, op, LDAP_PROTOCOL_ERROR, errmsg );
 404                 } else {
 405                         send_ldap_result( conn, op, rc,
 406                                 NULL, errmsg, NULL, NULL );
 407                 }
 408         }
 409
 410         return rc;
 411 }
 412
 413 static int parseManageDSAit (
 414         Connection *conn,
 415         Operation *op,
 416         LDAPControl *ctrl,
 417         const char **text )
 418 {
 419         if ( op->o_managedsait != SLAP_NO_CONTROL ) {
 420                 *text = "manageDSAit control specified multiple times";
 421                 return LDAP_PROTOCOL_ERROR;
 422         }
 423
 424         if ( ctrl->ldctl_value.bv_len ) {
 425                 *text = "manageDSAit control value not empty";
 426                 return LDAP_PROTOCOL_ERROR;
 427         }
 428
 429         op->o_managedsait = ctrl->ldctl_iscritical
 430                 ? SLAP_CRITICAL_CONTROL
 431                 : SLAP_NONCRITICAL_CONTROL;
 432
 433         return LDAP_SUCCESS;
 434 }
 435
 436 static int parseProxyAuthz (
 437         Connection *conn,
 438         Operation *op,
 439         LDAPControl *ctrl,
 440         const char **text )
 441 {
 442         int rc;
 443         struct berval dn;
 444
 445         if ( op->o_proxy_authz != SLAP_NO_CONTROL ) {
 446                 *text = "proxy authorization control specified multiple times";
 447                 return LDAP_PROTOCOL_ERROR;
 448         }
 449
 450         op->o_proxy_authz = ctrl->ldctl_iscritical
 451                 ? SLAP_CRITICAL_CONTROL
 452                 : SLAP_NONCRITICAL_CONTROL;
 453
 454 #ifdef NEW_LOGGING
 455         LDAP_LOG( OPERATION, ARGS,
 456                 "parseProxyAuthz: conn %d authzid=\"%s\"\n",
 457                 conn->c_connid,
 458                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 459                 0 );
 460 #else
 461         Debug( LDAP_DEBUG_ARGS,
 462                 "parseProxyAuthz: conn %d authzid=\"%s\"\n",
 463                 conn->c_connid,
 464                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 465                 0 );
 466 #endif
 467
 468         if( ctrl->ldctl_value.bv_len == 0 ) {
 469 #ifdef NEW_LOGGING
 470                 LDAP_LOG( OPERATION, TRACE,
 471                         "parseProxyAuthz: conn=%d anonymous\n",
 472                         conn->c_connid, 0, 0 );
 473 #else
 474                 Debug( LDAP_DEBUG_TRACE,
 475                         "parseProxyAuthz: conn=%d anonymous\n",
 476                         conn->c_connid, 0, 0 );
 477 #endif
 478
 479                 /* anonymous */
 480                 free( op->o_dn.bv_val );
 481                 op->o_dn.bv_len = 0;
 482                 op->o_dn.bv_val = ch_strdup( "" );
 483
 484                 free( op->o_ndn.bv_val );
 485                 op->o_ndn.bv_len = 0;
 486                 op->o_ndn.bv_val = ch_strdup( "" );
 487
 488                 return LDAP_SUCCESS;
 489         }
 490
 491         rc = slap_sasl_getdn( conn,
 492                 ctrl->ldctl_value.bv_val, ctrl->ldctl_value.bv_len,
 493                 NULL, &dn, SLAP_GETDN_AUTHZID );
 494
 495         if( rc != LDAP_SUCCESS || !dn.bv_len ) {
 496                 *text = "authzId mapping failed";
 497                 return LDAP_PROXY_AUTHZ_FAILURE;
 498         }
 499
 500 #ifdef NEW_LOGGING
 501         LDAP_LOG( OPERATION, TRACE,
 502                 "parseProxyAuthz: conn=%d \"%s\"\n",
 503                 conn->c_connid,
 504                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 505 #else
 506         Debug( LDAP_DEBUG_TRACE,
 507                 "parseProxyAuthz: conn=%d \"%s\"\n",
 508                 conn->c_connid,
 509                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 510 #endif
 511
 512         rc = slap_sasl_authorized( conn, &op->o_dn, &dn );
 513
 514         if( rc ) {
 515                 ch_free( dn.bv_val );
 516                 *text = "not authorized to assume identity";
 517                 return LDAP_PROXY_AUTHZ_FAILURE;
 518         }
 519
 520 #if 0
 521         ch_free( op->o_dn );
 522         ch_free( op->o_ndn );
 523
 524         op->o_dn = dn;
 525 #endif
 526
 527         *text = "not (yet) implemented";
 528         return LDAP_OTHER;
 529 }
 530
 531 static int parseNoOp (
 532         Connection *conn,
 533         Operation *op,
 534         LDAPControl *ctrl,
 535         const char **text )
 536 {
 537         if ( op->o_noop != SLAP_NO_CONTROL ) {
 538                 *text = "noop control specified multiple times";
 539                 return LDAP_PROTOCOL_ERROR;
 540         }
 541
 542         if ( ctrl->ldctl_value.bv_len ) {
 543                 *text = "noop control value not empty";
 544                 return LDAP_PROTOCOL_ERROR;
 545         }
 546
 547         op->o_noop = ctrl->ldctl_iscritical
 548                 ? SLAP_CRITICAL_CONTROL
 549                 : SLAP_NONCRITICAL_CONTROL;
 550
 551         return LDAP_SUCCESS;
 552 }
 553
 554 static int parsePagedResults (
 555         Connection *conn,
 556         Operation *op,
 557         LDAPControl *ctrl,
 558         const char **text )
 559 {
 560         ber_tag_t tag;
 561         ber_int_t size;
 562         BerElement *ber;
 563         struct berval cookie = { 0, NULL };
 564
 565         if ( op->o_pagedresults != SLAP_NO_CONTROL ) {
 566                 *text = "paged results control specified multiple times";
 567                 return LDAP_PROTOCOL_ERROR;
 568         }
 569
 570         if ( ctrl->ldctl_value.bv_len == 0 ) {
 571                 *text = "paged results control value is empty (or absent)";
 572                 return LDAP_PROTOCOL_ERROR;
 573         }
 574
 575         /* Parse the control value
 576          *      realSearchControlValue ::= SEQUENCE {
 577          *              size    INTEGER (0..maxInt),
 578          *                              -- requested page size from client
 579          *                              -- result set size estimate from server
 580          *              cookie  OCTET STRING
 581          */
 582         ber = ber_init( &ctrl->ldctl_value );
 583         if( ber == NULL ) {
 584                 *text = "internal error";
 585                 return LDAP_OTHER;
 586         }
 587
 588         tag = ber_scanf( ber, "{im}", &size, &cookie );
 589         (void) ber_free( ber, 1 );
 590
 591         if( tag == LBER_ERROR ) {
 592                 *text = "paged results control could not be decoded";
 593                 return LDAP_PROTOCOL_ERROR;
 594         }
 595
 596         if( size < 0 ) {
 597                 *text = "paged results control size invalid";
 598                 return LDAP_PROTOCOL_ERROR;
 599         }
 600
 601         if( cookie.bv_len ) {
 602                 PagedResultsCookie reqcookie;
 603                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 604                         /* bad cookie */
 605                         *text = "paged results cookie is invalid";
 606                         return LDAP_PROTOCOL_ERROR;
 607                 }
 608
 609                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 610
 611                 if( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 612                         /* bad cookie */
 613                         *text = "paged results cookie is invalid";
 614                         return LDAP_PROTOCOL_ERROR;
 615
 616                 } else if( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 617                         *text = "paged results cookie is invalid or old";
 618                         return LDAP_UNWILLING_TO_PERFORM;
 619                 }
 620         } else {
 621                 /* Initial request.  Initialize state. */
 622                 op->o_pagedresults_state.ps_cookie = 0;
 623                 op->o_pagedresults_state.ps_id = NOID;
 624         }
 625
 626         op->o_pagedresults_size = size;
 627
 628         op->o_pagedresults = ctrl->ldctl_iscritical
 629                 ? SLAP_CRITICAL_CONTROL
 630                 : SLAP_NONCRITICAL_CONTROL;
 631
 632         return LDAP_SUCCESS;
 633 }
 634
 635 int parseValuesReturnFilter (
 636         Connection *conn,
 637         Operation *op,
 638         LDAPControl *ctrl,
 639         const char **text )
 640 {
 641         int             rc;
 642         BerElement      *ber;
 643         struct berval   fstr = { 0, NULL };
 644         const char *err_msg = "";
 645
 646         if ( op->o_valuesreturnfilter != SLAP_NO_CONTROL ) {
 647                 *text = "valuesReturnFilter control specified multiple times";
 648                 return LDAP_PROTOCOL_ERROR;
 649         }
 650
 651         if ( ctrl->ldctl_value.bv_len == 0 ) {
 652                 *text = "valuesReturnFilter control value is empty (or absent)";
 653                 return LDAP_PROTOCOL_ERROR;
 654         }
 655
 656         ber = ber_init( &(ctrl->ldctl_value) );
 657         if (ber == NULL) {
 658                 *text = "internal error";
 659                 return LDAP_OTHER;
 660         }
 661
 662         rc = get_vrFilter( conn, ber, &(op->vrFilter), &err_msg);
 663
 664         if( rc != LDAP_SUCCESS ) {
 665                 text = &err_msg;
 666                 if( rc == SLAPD_DISCONNECT ) {
 667                         send_ldap_disconnect( conn, op,
 668                                 LDAP_PROTOCOL_ERROR, *text );
 669                 } else {
 670                         send_ldap_result( conn, op, rc,
 671                                 NULL, *text, NULL, NULL );
 672                 }
 673                 if( fstr.bv_val != NULL) free( fstr.bv_val );
 674                 if( op->vrFilter != NULL) vrFilter_free( op->vrFilter );
 675
 676         } else {
 677                 vrFilter2bv( op->vrFilter, &fstr );
 678         }
 679
 680 #ifdef NEW_LOGGING
 681         LDAP_LOG( OPERATION, ARGS,
 682                 "parseValuesReturnFilter: conn %d       vrFilter: %s\n",
 683                 conn->c_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
 684 #else
 685         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
 686                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
 687 #endif
 688
 689         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
 690                 ? SLAP_CRITICAL_CONTROL
 691                 : SLAP_NONCRITICAL_CONTROL;
 692
 693         return LDAP_SUCCESS;
 694 }
 695
 696 #ifdef LDAP_CONTROL_SUBENTRIES
 697 static int parseSubentries (
 698         Connection *conn,
 699         Operation *op,
 700         LDAPControl *ctrl,
 701         const char **text )
 702 {
 703         if ( op->o_subentries != SLAP_NO_CONTROL ) {
 704                 *text = "subentries control specified multiple times";
 705                 return LDAP_PROTOCOL_ERROR;
 706         }
 707
 708         /* FIXME: should use BER library */
 709         if( ( ctrl->ldctl_value.bv_len != 3 )
 710                 && ( ctrl->ldctl_value.bv_val[0] != 0x01 )
 711                 && ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
 712         {
 713                 *text = "subentries control value encoding is bogus";
 714                 return LDAP_PROTOCOL_ERROR;
 715         }
 716
 717         op->o_subentries = ctrl->ldctl_iscritical
 718                 ? SLAP_CRITICAL_CONTROL
 719                 : SLAP_NONCRITICAL_CONTROL;
 720
 721         op->o_subentries_visibility = (ctrl->ldctl_value.bv_val[2] != 0x00);
 722
 723         return LDAP_SUCCESS;
 724 }
 725 #endif
 726
 727 #ifdef LDAP_CLIENT_UPDATE
 728 static int parseClientUpdate (
 729         Connection *conn,
 730         Operation *op,
 731         LDAPControl *ctrl,
 732         const char **text )
 733 {
 734         ber_tag_t tag;
 735         BerElement *ber;
 736         ber_int_t type;
 737         ber_int_t interval;
 738         ber_len_t len;
 739         struct berval scheme = { 0, NULL };
 740         struct berval cookie = { 0, NULL };
 741
 742         if ( op->o_clientupdate != SLAP_NO_CONTROL ) {
 743                 *text = "LCUP client update control specified multiple times";
 744                 return LDAP_PROTOCOL_ERROR;
 745         }
 746
 747         if ( ctrl->ldctl_value.bv_len == 0 ) {
 748                 *text = "LCUP client update control value is empty (or absent)";
 749                 return LDAP_PROTOCOL_ERROR;
 750         }
 751
 752         /* Parse the control value
 753          *      ClientUpdateControlValue ::= SEQUENCE {
 754          *              updateType      ENUMERATED {
 755          *                                      synchronizeOnly {0},
 756          *                                      synchronizeAndPersist {1},
 757          *                                      persistOnly {2} },
 758          *              sendCookieInterval INTEGER OPTIONAL,
 759          *              cookie          LCUPCookie OPTIONAL
 760          *      }
 761          */
 762
 763         ber = ber_init( &ctrl->ldctl_value );
 764         if( ber == NULL ) {
 765                 *text = "internal error";
 766                 return LDAP_OTHER;
 767         }
 768
 769         if ( (tag = ber_scanf( ber, "{i" /*}*/, &type )) == LBER_ERROR ) {
 770                 *text = "LCUP client update control : decoding error";
 771                 return LDAP_PROTOCOL_ERROR;
 772         }
 773
 774         switch( type ) {
 775         case LDAP_CUP_SYNC_ONLY:
 776                 type = SLAP_LCUP_SYNC;
 777                 break;
 778         case LDAP_CUP_SYNC_AND_PERSIST:
 779                 type = SLAP_LCUP_SYNC_AND_PERSIST;
 780                 break;
 781         case LDAP_CUP_PERSIST_ONLY:
 782                 type = SLAP_LCUP_PERSIST;
 783                 break;
 784         default:
 785                 *text = "LCUP client update control : unknown update type";
 786                 return LDAP_PROTOCOL_ERROR;
 787         }
 788
 789         if ( (tag = ber_peek_tag( ber, &len )) == LBER_DEFAULT ) {
 790                 *text = "LCUP client update control : decoding error";
 791                 return LDAP_PROTOCOL_ERROR;
 792         }
 793
 794         if ( tag == LDAP_TAG_INTERVAL ) {
 795                 if ( (tag = ber_scanf( ber, "i", &interval )) == LBER_ERROR ) {
 796                         *text = "LCUP client update control : decoding error";
 797                         return LDAP_PROTOCOL_ERROR;
 798                 }
 799
 800                 if ( interval <= 0 ) {
 801                         /* server chooses interval */
 802                         interval = LDAP_CUP_DEFAULT_SEND_COOKIE_INTERVAL;
 803                 }
 804
 805         } else {
 806                 /* server chooses interval */
 807                 interval = LDAP_CUP_DEFAULT_SEND_COOKIE_INTERVAL;
 808         }
 809
 810         if ( (tag = ber_peek_tag( ber, &len )) == LBER_DEFAULT ) {
 811                 *text = "LCUP client update control : decoding error";
 812                 return LDAP_PROTOCOL_ERROR;
 813         }
 814
 815         if ( tag == LDAP_TAG_COOKIE ) {
 816                 if ( (tag = ber_scanf( ber, /*{*/ "{mm}}",
 817                                         &scheme, &cookie )) == LBER_ERROR ) {
 818                         *text = "LCUP client update control : decoding error";
 819                         return LDAP_PROTOCOL_ERROR;
 820                 }
 821         }
 822
 823         /* TODO : Cookie Scheme Validation */
 824 #if 0
 825         if ( lcup_cookie_scheme_validate(scheme) != LDAP_SUCCESS ) {
 826                 *text = "Unsupported LCUP cookie scheme";
 827                 return LCUP_UNSUPPORTED_SCHEME;
 828         }
 829
 830         if ( lcup_cookie_validate(scheme, cookie) != LDAP_SUCCESS ) {
 831                 *text = "Invalid LCUP cookie";
 832                 return LCUP_INVALID_COOKIE;
 833         }
 834 #endif
 835
 836         ber_dupbv( &op->o_clientupdate_state, &cookie );
 837
 838         (void) ber_free( ber, 1 );
 839
 840         op->o_clientupdate_type = (char) type;
 841         op->o_clientupdate_interval = interval;
 842
 843         op->o_clientupdate = ctrl->ldctl_iscritical
 844                 ? SLAP_CRITICAL_CONTROL
 845                 : SLAP_NONCRITICAL_CONTROL;
 846
 847         return LDAP_SUCCESS;
 848 }
 849 #endif /* LDAP_CLIENT_UPDATE */