git.sur5r.net Git - openldap/blob - libraries/libldap/request.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2004 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 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  */
  18 /* This notice applies to changes, created by or for Novell, Inc.,
  19  * to preexisting works for which notices appear elsewhere in this file.
  20  *
  21  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  22  *
  23  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  24  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  25  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  26  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  27  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  28  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  29  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  30  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  31  *---
  32  * Modification to OpenLDAP source by Novell, Inc.
  33  * April 2000 sfs  Added code to chase V3 referrals
  34  *  request.c - sending of ldap requests; handling of referrals
  35  *---
  36  * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
  37  * can be found in the file "build/LICENSE-2.0.1" in this distribution
  38  * of OpenLDAP Software.
  39  */
  40
  41 #include "portable.h"
  42
  43 #include <stdio.h>
  44
  45 #include <ac/stdlib.h>
  46
  47 #include <ac/errno.h>
  48 #include <ac/socket.h>
  49 #include <ac/string.h>
  50 #include <ac/time.h>
  51 #include <ac/unistd.h>
  52
  53 #include "ldap-int.h"
  54 #include "lber.h"
  55
  56 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
  57 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
  58
  59 static BerElement *
  60 re_encode_request( LDAP *ld,
  61         BerElement *origber,
  62         ber_int_t msgid,
  63         int sref,
  64         LDAPURLDesc *srv,
  65         int *type );
  66
  67 BerElement *
  68 ldap_alloc_ber_with_options( LDAP *ld )
  69 {
  70         BerElement      *ber;
  71
  72     if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
  73                 ld->ld_errno = LDAP_NO_MEMORY;
  74         }
  75
  76         return( ber );
  77 }
  78
  79
  80 void
  81 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  82 {
  83         ber->ber_options = ld->ld_lberoptions;
  84 }
  85
  86
  87 ber_int_t
  88 ldap_send_initial_request(
  89         LDAP *ld,
  90         ber_tag_t msgtype,
  91         const char *dn,
  92         BerElement *ber,
  93         ber_int_t msgid)
  94 {
  95         LDAPURLDesc     *servers;
  96         int rc;
  97
  98 #ifdef NEW_LOGGING
  99         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_initial_request\n", 0, 0, 0 );
 100 #else
 101         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
 102 #endif
 103
 104         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 105                 /* not connected yet */
 106                 int rc = ldap_open_defconn( ld );
 107
 108                 if( rc < 0 ) {
 109                         ber_free( ber, 1 );
 110                         return( -1 );
 111                 }
 112
 113 #ifdef NEW_LOGGING
 114                 LDAP_LOG ( OPERATION, DETAIL1,
 115                         "ldap_send_initial_request: ldap_open_defconn: successful\n" ,
 116                         0, 0, 0);
 117 #else
 118                 Debug( LDAP_DEBUG_TRACE,
 119                         "ldap_open_defconn: successful\n",
 120                         0, 0, 0 );
 121 #endif
 122         }
 123
 124         {
 125                 /*
 126                  * use of DNS is turned off or this is an X.500 DN...
 127                  * use our default connection
 128                  */
 129                 servers = NULL;
 130         }
 131
 132 #ifdef LDAP_CONNECTIONLESS
 133         if (LDAP_IS_UDP(ld)) {
 134                 if (msgtype == LDAP_REQ_BIND) {
 135                         if (ld->ld_options.ldo_cldapdn)
 136                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 137                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 138                         return 0;
 139                 }
 140                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 141                         return LDAP_PARAM_ERROR;
 142         }
 143 #endif
 144 #ifdef LDAP_R_COMPILE
 145         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 146 #endif
 147         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 148                                                                         servers, NULL, NULL );
 149 #ifdef LDAP_R_COMPILE
 150         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 151 #endif
 152         if (servers)
 153                 ldap_free_urllist(servers);
 154         return(rc);
 155 }
 156
 157
 158 int
 159 ldap_int_flush_request(
 160         LDAP *ld,
 161         LDAPRequest *lr )
 162 {
 163         LDAPConn *lc = lr->lr_conn;
 164
 165         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 166                 if ( errno == EAGAIN ) {
 167                         /* need to continue write later */
 168                         lr->lr_status = LDAP_REQST_WRITING;
 169                         ldap_mark_select_write( ld, lc->lconn_sb );
 170                         ld->ld_errno = LDAP_BUSY;
 171                         return -2;
 172                 } else {
 173                         ld->ld_errno = LDAP_SERVER_DOWN;
 174                         ldap_free_request( ld, lr );
 175                         ldap_free_connection( ld, lc, 0, 0 );
 176                         return( -1 );
 177                 }
 178         } else {
 179                 if ( lr->lr_parent == NULL ) {
 180                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 181                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 182                 }
 183                 lr->lr_status = LDAP_REQST_INPROGRESS;
 184
 185                 /* sent -- waiting for a response */
 186                 ldap_mark_select_read( ld, lc->lconn_sb );
 187         }
 188         return 0;
 189 }
 190
 191 int
 192 ldap_send_server_request(
 193         LDAP *ld,
 194         BerElement *ber,
 195         ber_int_t msgid,
 196         LDAPRequest *parentreq,
 197         LDAPURLDesc *srvlist,
 198         LDAPConn *lc,
 199         LDAPreqinfo *bind )
 200 {
 201         LDAPRequest     *lr;
 202         int incparent, rc;
 203
 204 #ifdef NEW_LOGGING
 205         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_server_request\n", 0, 0, 0 );
 206 #else
 207         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 208 #endif
 209
 210         incparent = 0;
 211         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 212
 213         if ( lc == NULL ) {
 214                 if ( srvlist == NULL ) {
 215                         lc = ld->ld_defconn;
 216                 } else {
 217                         if (( lc = find_connection( ld, srvlist, 1 )) ==
 218                             NULL ) {
 219                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 220                                         /* Remember the bind in the parent */
 221                                         incparent = 1;
 222                                         ++parentreq->lr_outrefcnt;
 223                                 }
 224                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 225                         }
 226                 }
 227         }
 228
 229         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 230                 ber_free( ber, 1 );
 231                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 232                         ld->ld_errno = LDAP_SERVER_DOWN;
 233                 }
 234                 if ( incparent ) {
 235                         /* Forget about the bind */
 236                         --parentreq->lr_outrefcnt;
 237                 }
 238                 return( -1 );
 239         }
 240
 241         use_connection( ld, lc );
 242
 243         /* If we still have an incomplete write, try to finish it before
 244          * dealing with the new request. If we don't finish here, return
 245          * LDAP_BUSY and let the caller retry later. We only allow a single
 246          * request to be in WRITING state.
 247          */
 248         rc = 0;
 249         if ( ld->ld_requests &&
 250                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 251                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 ) {
 252                 rc = -1;
 253         }
 254         if ( rc ) return rc;
 255
 256         if (( lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ))) ==
 257             NULL ) {
 258                 ld->ld_errno = LDAP_NO_MEMORY;
 259                 ldap_free_connection( ld, lc, 0, 0 );
 260                 ber_free( ber, 1 );
 261                 if ( incparent ) {
 262                         /* Forget about the bind */
 263                         --parentreq->lr_outrefcnt;
 264                 }
 265                 return( -1 );
 266         }
 267         lr->lr_msgid = msgid;
 268         lr->lr_status = LDAP_REQST_INPROGRESS;
 269         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 270         lr->lr_ber = ber;
 271         lr->lr_conn = lc;
 272         if ( parentreq != NULL ) {      /* sub-request */
 273                 if ( !incparent ) {
 274                         /* Increment if we didn't do it before the bind */
 275                         ++parentreq->lr_outrefcnt;
 276                 }
 277                 lr->lr_origid = parentreq->lr_origid;
 278                 lr->lr_parentcnt = parentreq->lr_parentcnt + 1;
 279                 lr->lr_parent = parentreq;
 280                 lr->lr_refnext = parentreq->lr_child;
 281                 parentreq->lr_child = lr;
 282         } else {                        /* original request */
 283                 lr->lr_origid = lr->lr_msgid;
 284         }
 285
 286         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 287                 lr->lr_next->lr_prev = lr;
 288         }
 289         ld->ld_requests = lr;
 290         lr->lr_prev = NULL;
 291
 292         ld->ld_errno = LDAP_SUCCESS;
 293         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 294                 msgid = -1;
 295         }
 296
 297         return( msgid );
 298 }
 299
 300 LDAPConn *
 301 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 302         int connect, LDAPreqinfo *bind )
 303 {
 304         LDAPConn        *lc;
 305         LDAPURLDesc     *srv;
 306         Sockbuf         *sb = NULL;
 307
 308 #ifdef NEW_LOGGING
 309         LDAP_LOG ( OPERATION, ENTRY, "ldap_new_connection\n", 0, 0, 0 );
 310 #else
 311         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection\n", 0, 0, 0 );
 312 #endif
 313         /*
 314          * make a new LDAP server connection
 315          * XXX open connection synchronously for now
 316          */
 317         if (( lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ))) == NULL ||
 318             ( !use_ldsb && ( (sb = ber_sockbuf_alloc()) == NULL ))) {
 319                 if ( lc != NULL ) {
 320                         LDAP_FREE( (char *)lc );
 321                 }
 322                 ld->ld_errno = LDAP_NO_MEMORY;
 323                 return( NULL );
 324         }
 325
 326         lc->lconn_sb = ( use_ldsb ) ? ld->ld_sb : sb;
 327
 328         if ( connect ) {
 329                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 330                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 ) {
 331                                 break;
 332                         }
 333                 }
 334
 335                 if ( srv == NULL ) {
 336                         if ( !use_ldsb ) {
 337                                 ber_sockbuf_free( lc->lconn_sb );
 338                         }
 339                     LDAP_FREE( (char *)lc );
 340                     ld->ld_errno = LDAP_SERVER_DOWN;
 341                     return( NULL );
 342                 }
 343
 344                 lc->lconn_server = ldap_url_dup(srv);
 345         }
 346
 347         lc->lconn_status = LDAP_CONNST_CONNECTED;
 348         lc->lconn_next = ld->ld_conns;
 349         ld->ld_conns = lc;
 350
 351         /*
 352          * XXX for now, we always do a synchronous bind.  This will have
 353          * to change in the long run...
 354          */
 355         if ( bind != NULL) {
 356                 int             err = 0;
 357                 LDAPConn        *savedefconn;
 358
 359                 /* Set flag to prevent additional referrals from being processed on this
 360                  * connection until the bind has completed
 361                  */
 362                 lc->lconn_rebind_inprogress = 1;
 363                 /* V3 rebind function */
 364                 if ( ld->ld_rebind_proc != NULL) {
 365                         LDAPURLDesc     *srvfunc;
 366                         if( ( srvfunc = ldap_url_dup( srvlist)) == NULL) {
 367                                 ld->ld_errno = LDAP_NO_MEMORY;
 368                                 err = -1;
 369                         } else {
 370                                 savedefconn = ld->ld_defconn;
 371                                 ++lc->lconn_refcnt;     /* avoid premature free */
 372                                 ld->ld_defconn = lc;
 373
 374 #ifdef NEW_LOGGING
 375                                 LDAP_LOG ( OPERATION, DETAIL1,
 376                                         "ldap_new_connection: Call application rebind_proc\n",
 377                                         0, 0, 0 );
 378 #else
 379                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 380 #endif
 381 #ifdef LDAP_R_COMPILE
 382                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 383                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 384 #endif
 385                                 err = (*ld->ld_rebind_proc)( ld,
 386                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 387                                         ld->ld_rebind_params );
 388 #ifdef LDAP_R_COMPILE
 389                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 390                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 391 #endif
 392
 393                                 ld->ld_defconn = savedefconn;
 394                                 --lc->lconn_refcnt;
 395
 396                                 if( err != 0) {
 397                                 err = -1;
 398                                         ldap_free_connection( ld, lc, 1, 0 );
 399                                         lc = NULL;
 400                         }
 401                                 ldap_free_urldesc( srvfunc);
 402                 }
 403                 } else {
 404                         savedefconn = ld->ld_defconn;
 405                         ++lc->lconn_refcnt;     /* avoid premature free */
 406                         ld->ld_defconn = lc;
 407
 408 #ifdef NEW_LOGGING
 409                         LDAP_LOG ( OPERATION, DETAIL1,
 410                                 "ldap_new_connection: anonymous rebind via ldap_bind_s\n",
 411                                 0, 0, 0 );
 412 #else
 413                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 414 #endif
 415 #ifdef LDAP_R_COMPILE
 416                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 417                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 418 #endif
 419                         if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
 420                                 err = -1;
 421                         }
 422 #ifdef LDAP_R_COMPILE
 423                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 424                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 425 #endif
 426                         ld->ld_defconn = savedefconn;
 427                         --lc->lconn_refcnt;
 428
 429                 if ( err != 0 ) {
 430                         ldap_free_connection( ld, lc, 1, 0 );
 431                         lc = NULL;
 432                 }
 433         }
 434                 if( lc != NULL)
 435                         lc->lconn_rebind_inprogress = 0;
 436         }
 437
 438         return( lc );
 439 }
 440
 441
 442 static LDAPConn *
 443 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 444 /*
 445  * return an existing connection (if any) to the server srv
 446  * if "any" is non-zero, check for any server in the "srv" chain
 447  */
 448 {
 449         LDAPConn        *lc;
 450         LDAPURLDesc     *ls;
 451
 452         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 453                 for ( ls = srv; ls != NULL; ls = ls->lud_next ) {
 454                         if ( lc->lconn_server->lud_host != NULL &&
 455                                 *lc->lconn_server->lud_host != '\0' &&
 456                             ls->lud_host != NULL && *ls->lud_host != '\0' &&
 457                                 strcasecmp( ls->lud_host, lc->lconn_server->lud_host ) == 0
 458                             && ls->lud_port == lc->lconn_server->lud_port ) {
 459                                 return lc;
 460                         }
 461                         if ( !any ) {
 462                                 break;
 463                         }
 464                 }
 465         }
 466
 467         return NULL;
 468 }
 469
 470
 471
 472 static void
 473 use_connection( LDAP *ld, LDAPConn *lc )
 474 {
 475         ++lc->lconn_refcnt;
 476         lc->lconn_lastused = time( NULL );
 477 }
 478
 479
 480 void
 481 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 482 {
 483         LDAPConn        *tmplc, *prevlc;
 484
 485 #ifdef NEW_LOGGING
 486         LDAP_LOG ( OPERATION, ENTRY, "ldap_free_connection\n", 0, 0, 0 );
 487 #else
 488         Debug( LDAP_DEBUG_TRACE, "ldap_free_connection\n", 0, 0, 0 );
 489 #endif
 490
 491         if ( force || --lc->lconn_refcnt <= 0 ) {
 492                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 493                         ldap_mark_select_clear( ld, lc->lconn_sb );
 494                         if ( unbind ) {
 495                                 ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
 496                         }
 497                 }
 498
 499                 if( lc->lconn_ber != NULL ) {
 500                         ber_free( lc->lconn_ber, 1 );
 501                 }
 502
 503                 ldap_int_sasl_close( ld, lc );
 504
 505                 prevlc = NULL;
 506                 for ( tmplc = ld->ld_conns; tmplc != NULL;
 507                     tmplc = tmplc->lconn_next ) {
 508                         if ( tmplc == lc ) {
 509                                 if ( prevlc == NULL ) {
 510                                     ld->ld_conns = tmplc->lconn_next;
 511                                 } else {
 512                                     prevlc->lconn_next = tmplc->lconn_next;
 513                                 }
 514                                 break;
 515                         }
 516                         prevlc = tmplc;
 517                 }
 518                 ldap_free_urllist( lc->lconn_server );
 519 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 520                 if ( lc->lconn_krbinstance != NULL ) {
 521                         LDAP_FREE( lc->lconn_krbinstance );
 522                 }
 523 #endif
 524                 if ( lc->lconn_sb != ld->ld_sb ) {
 525                         ber_sockbuf_free( lc->lconn_sb );
 526                 }
 527                 if( lc->lconn_rebind_queue != NULL) {
 528                         int i;
 529                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++) {
 530                                 LDAP_VFREE(lc->lconn_rebind_queue[i]);
 531                         }
 532                         LDAP_FREE( lc->lconn_rebind_queue);
 533                 }
 534                 LDAP_FREE( lc );
 535 #ifdef NEW_LOGGING
 536                 LDAP_LOG ( OPERATION, RESULTS,
 537                         "ldap_free_connection: actually freed\n", 0, 0, 0 );
 538 #else
 539                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
 540                     0, 0, 0 );
 541 #endif
 542         } else {
 543                 lc->lconn_lastused = time( NULL );
 544 #ifdef NEW_LOGGING
 545                 LDAP_LOG ( OPERATION, RESULTS, "ldap_free_connection: refcnt %d\n",
 546                         lc->lconn_refcnt, 0, 0 );
 547 #else
 548                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 549                     lc->lconn_refcnt, 0, 0 );
 550 #endif
 551         }
 552 }
 553
 554
 555 #ifdef LDAP_DEBUG
 556 void
 557 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 558 {
 559         LDAPConn        *lc;
 560         char            timebuf[32];
 561
 562         fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
 563         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 564                 if ( lc->lconn_server != NULL ) {
 565                         fprintf( stderr, "* host: %s  port: %d%s\n",
 566                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 567                             : lc->lconn_server->lud_host,
 568                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 569                             ld->ld_sb ) ? "  (default)" : "" );
 570                 }
 571                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 572                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 573                     "NeedSocket" : ( lc->lconn_status ==
 574                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 575                 fprintf( stderr, "  last used: %s",
 576                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 577                 if( lc->lconn_rebind_inprogress ) {
 578                         fprintf( stderr, "  rebind in progress\n");
 579                         if( lc->lconn_rebind_queue != NULL) {
 580                                 int i = 0;
 581                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 582                                         int j = 0;
 583                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 584                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 585                                                         i, j, lc->lconn_rebind_queue[i][j]);
 586                                         }
 587                                 }
 588                         } else {
 589                                 fprintf( stderr, "    queue is empty\n");
 590                         }
 591                 }
 592                 fprintf(stderr, "\n");
 593                 if ( !all ) {
 594                         break;
 595                 }
 596         }
 597 }
 598
 599
 600 void
 601 ldap_dump_requests_and_responses( LDAP *ld )
 602 {
 603         LDAPRequest     *lr;
 604         LDAPMessage     *lm, *l;
 605
 606 #ifdef LDAP_R_COMPILE
 607         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 608 #endif
 609         fprintf( stderr, "** Outstanding Requests:\n" );
 610         if (( lr = ld->ld_requests ) == NULL ) {
 611                 fprintf( stderr, "   Empty\n" );
 612         }
 613         for ( ; lr != NULL; lr = lr->lr_next ) {
 614             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 615                 lr->lr_msgid, lr->lr_origid,
 616                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 617                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 618                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 619                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 620                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
 621             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 622                     lr->lr_outrefcnt, lr->lr_parentcnt );
 623         }
 624 #ifdef LDAP_R_COMPILE
 625         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 626 #endif
 627         fprintf( stderr, "** Response Queue:\n" );
 628         if (( lm = ld->ld_responses ) == NULL ) {
 629                 fprintf( stderr, "   Empty\n" );
 630         }
 631         for ( ; lm != NULL; lm = lm->lm_next ) {
 632                 fprintf( stderr, " * msgid %d,  type %lu\n",
 633                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 634                 if (( l = lm->lm_chain ) != NULL ) {
 635                         fprintf( stderr, "   chained responses:\n" );
 636                         for ( ; l != NULL; l = l->lm_chain ) {
 637                                 fprintf( stderr,
 638                                     "  * msgid %d,  type %lu\n",
 639                                     l->lm_msgid,
 640                                     (unsigned long) l->lm_msgtype );
 641                         }
 642                 }
 643         }
 644 }
 645 #endif /* LDAP_DEBUG */
 646
 647 void
 648 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 649 {
 650         if ( lr->lr_prev == NULL ) {
 651                 ld->ld_requests = lr->lr_next;
 652         } else {
 653                 lr->lr_prev->lr_next = lr->lr_next;
 654         }
 655
 656         if ( lr->lr_next != NULL ) {
 657                 lr->lr_next->lr_prev = lr->lr_prev;
 658         }
 659
 660         if ( lr->lr_ber != NULL ) {
 661                 ber_free( lr->lr_ber, 1 );
 662         }
 663
 664         if ( lr->lr_res_error != NULL ) {
 665                 LDAP_FREE( lr->lr_res_error );
 666         }
 667
 668         if ( lr->lr_res_matched != NULL ) {
 669                 LDAP_FREE( lr->lr_res_matched );
 670         }
 671
 672         LDAP_FREE( lr );
 673 }
 674
 675 void
 676 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 677 {
 678         LDAPRequest     **ttmplr;
 679
 680 #ifdef NEW_LOGGING
 681         LDAP_LOG ( OPERATION, ARGS, "ldap_free_request (origid %d, msgid %d)\n",
 682                 lr->lr_origid, lr->lr_msgid, 0 );
 683 #else
 684         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 685                 lr->lr_origid, lr->lr_msgid, 0 );
 686 #endif
 687
 688         /* free all referrals (child requests) */
 689         while ( lr->lr_child )
 690                 ldap_free_request( ld, lr->lr_child );
 691
 692         if ( lr->lr_parent != NULL ) {
 693                 --lr->lr_parent->lr_outrefcnt;
 694                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 695                 if ( *ttmplr == lr )
 696                         *ttmplr = lr->lr_refnext;
 697         }
 698         ldap_free_request_int( ld, lr );
 699 }
 700
 701
 702 /*
 703  * Chase v3 referrals
 704  *
 705  * Parameters:
 706  *  (IN) ld = LDAP connection handle
 707  *  (IN) lr = LDAP Request structure
 708  *  (IN) refs = array of pointers to referral strings that we will chase
 709  *              The array will be free'd by this function when no longer needed
 710  *  (IN) sref != 0 if following search reference
 711  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 712  *  (OUT) hadrefp = 1 if sucessfully followed referral
 713  *
 714  * Return value - number of referrals followed
 715  */
 716 int
 717 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 718 {
 719         char            *unfollowed;
 720         int                      unfollowedcnt = 0;
 721         LDAPRequest     *origreq;
 722         LDAPURLDesc     *srv = NULL;
 723         BerElement      *ber;
 724         char            **refarray = NULL;
 725         LDAPConn        *lc;
 726         int                      rc, count, i, j, id;
 727         LDAPreqinfo  rinfo;
 728
 729         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 730         *hadrefp = 0;
 731
 732 #ifdef NEW_LOGGING
 733         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_v3referrals\n", 0, 0, 0 );
 734 #else
 735         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 736 #endif
 737
 738         unfollowed = NULL;
 739         rc = count = 0;
 740
 741         /* If no referrals in array, return */
 742         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 743                 rc = 0;
 744                 goto done;
 745         }
 746
 747         /* Check for hop limit exceeded */
 748         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 749 #ifdef NEW_LOGGING
 750                 LDAP_LOG ( OPERATION, DETAIL1,
 751                         "ldap_chase_v3referrals: more than %d referral hops (dropping)\n",
 752                         ld->ld_refhoplimit, 0, 0 );
 753 #else
 754                 Debug( LDAP_DEBUG_ANY,
 755                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 756 #endif
 757                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 758             rc = -1;
 759                 goto done;
 760         }
 761
 762         /* find original request */
 763         for ( origreq = lr;
 764                 origreq->lr_parent != NULL;
 765                 origreq = origreq->lr_parent )
 766         {
 767                 /* empty */ ;
 768         }
 769
 770         refarray = refs;
 771         refs = NULL;
 772         /* parse out & follow referrals */
 773         for( i=0; refarray[i] != NULL; i++) {
 774                 /* Parse the referral URL */
 775                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 776                         ld->ld_errno = rc;
 777                         rc = -1;
 778                         goto done;
 779                 }
 780
 781                 if( srv->lud_crit_exts ) {
 782                         /* we do not support any extensions */
 783                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 784                         rc = -1;
 785                         goto done;
 786                 }
 787
 788                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 789                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 790                         LDAP_FREE( srv->lud_dn );
 791                         srv->lud_dn = NULL;
 792                 }
 793
 794                 /* check connection for re-bind in progress */
 795                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 796                         if( lc->lconn_rebind_inprogress) {
 797                                 /* We are already chasing a referral or search reference and a
 798                                  * bind on that connection is in progress.  We must queue
 799                                  * referrals on that connection, so we don't get a request
 800                                  * going out before the bind operation completes. This happens
 801                                  * if two search references come in one behind the other
 802                                  * for the same server with different contexts.
 803                                  */
 804 #ifdef NEW_LOGGING
 805                                 LDAP_LOG ( OPERATION, DETAIL1,
 806                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 807                                         refarray[i], 0, 0 );
 808 #else
 809                                 Debug( LDAP_DEBUG_TRACE,
 810                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 811                                         refarray[i], 0, 0);
 812 #endif
 813                                 if( lc->lconn_rebind_queue == NULL ) {
 814                                         /* Create a referral list */
 815                                         lc->lconn_rebind_queue =
 816                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 817
 818                                         if( lc->lconn_rebind_queue == NULL) {
 819                                                 ld->ld_errno = LDAP_NO_MEMORY;
 820                                                 rc = -1;
 821                                                 goto done;
 822                                         }
 823
 824                                         lc->lconn_rebind_queue[0] = refarray;
 825                                         lc->lconn_rebind_queue[1] = NULL;
 826                                         refarray = NULL;
 827
 828                                 } else {
 829                                         /* Count how many referral arrays we already have */
 830                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 831                                                 /* empty */;
 832                                         }
 833
 834                                         /* Add the new referral to the list */
 835                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 836                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 837
 838                                         if( lc->lconn_rebind_queue == NULL ) {
 839                                                 ld->ld_errno = LDAP_NO_MEMORY;
 840                                                 rc = -1;
 841                                                 goto done;
 842                                         }
 843                                         lc->lconn_rebind_queue[j] = refarray;
 844                                         lc->lconn_rebind_queue[j+1] = NULL;
 845                                         refarray = NULL;
 846                                 }
 847
 848                                 /* We have queued the referral/reference, now just return */
 849                                 rc = 0;
 850                                 *hadrefp = 1;
 851                                 count = 1; /* Pretend we already followed referral */
 852                                 goto done;
 853                         }
 854                 }
 855                 /* Re-encode the request with the new starting point of the search.
 856                  * Note: In the future we also need to replace the filter if one
 857                  * was provided with the search reference
 858                  */
 859
 860                 /* For references we don't want old dn if new dn empty */
 861                 if ( sref && srv->lud_dn == NULL ) {
 862                         srv->lud_dn = LDAP_STRDUP( "" );
 863                 }
 864
 865                 LDAP_NEXT_MSGID( ld, id );
 866                 ber = re_encode_request( ld, origreq->lr_ber, id,
 867                         sref, srv, &rinfo.ri_request );
 868
 869                 if( ber == NULL ) {
 870                         ld->ld_errno = LDAP_ENCODING_ERROR;
 871                         rc = -1;
 872                         goto done;
 873                 }
 874
 875 #ifdef NEW_LOGGING
 876                 LDAP_LOG ( OPERATION, DETAIL1,
 877                         "ldap_chase_v3referrals: msgid %d, url \"%s\"\n",
 878                         lr->lr_msgid, refarray[i], 0 );
 879 #else
 880                 Debug( LDAP_DEBUG_TRACE,
 881                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 882                         lr->lr_msgid, refarray[i], 0);
 883 #endif
 884
 885                 /* Send the new request to the server - may require a bind */
 886                 rinfo.ri_msgid = origreq->lr_origid;
 887                 rinfo.ri_url = refarray[i];
 888 #ifdef LDAP_R_COMPILE
 889                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 890 #endif
 891                 rc = ldap_send_server_request( ld, ber, id,
 892                         origreq, srv, NULL, &rinfo );
 893 #ifdef LDAP_R_COMPILE
 894                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 895 #endif
 896                 if ( rc < 0 ) {
 897                         /* Failure, try next referral in the list */
 898 #ifdef NEW_LOGGING
 899                         LDAP_LOG ( OPERATION, ERR,
 900                         "ldap_chase_v3referrals: Unable to chase referral \"%s\" (%s)\n",
 901                         refarray[i], ldap_err2string( ld->ld_errno ), 0 );
 902 #else
 903                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
 904                                 refarray[i], ldap_err2string( ld->ld_errno ), 0);
 905 #endif
 906                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
 907                         ldap_free_urllist(srv);
 908                         srv = NULL;
 909                 } else {
 910                         /* Success, no need to try this referral list further */
 911                         rc = 0;
 912                         ++count;
 913                         *hadrefp = 1;
 914
 915                         /* check if there is a queue of referrals that came in during bind */
 916                         if( lc == NULL) {
 917                                 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
 918                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 919                                         rc = -1;
 920                                         goto done;
 921                                 }
 922                         }
 923
 924                         if( lc->lconn_rebind_queue != NULL) {
 925                                 /* Release resources of previous list */
 926                                 LDAP_VFREE(refarray);
 927                                 refarray = NULL;
 928                                 ldap_free_urllist(srv);
 929                                 srv = NULL;
 930
 931                                 /* Pull entries off end of queue so list always null terminated */
 932                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 933                                         ;
 934                                 }
 935                                 refarray = lc->lconn_rebind_queue[j-1];
 936                                 lc->lconn_rebind_queue[j-1] = NULL;
 937                                 /* we pulled off last entry from queue, free queue */
 938                                 if ( j == 1 ) {
 939                                         LDAP_FREE( lc->lconn_rebind_queue);
 940                                         lc->lconn_rebind_queue = NULL;
 941                                 }
 942                                 /* restart the loop the with new referral list */
 943                                 i = -1;
 944                                 continue;
 945                         }
 946                         break; /* referral followed, break out of for loop */
 947                 }
 948         } /* end for loop */
 949 done:
 950         LDAP_VFREE(refarray);
 951         ldap_free_urllist(srv);
 952         LDAP_FREE( *errstrp );
 953
 954         if( rc == 0) {
 955                 *errstrp = NULL;
 956                 LDAP_FREE( unfollowed );
 957                 return count;
 958         } else {
 959                 ld->ld_errno = LDAP_REFERRAL;
 960                 *errstrp = unfollowed;
 961                 return rc;
 962         }
 963 }
 964
 965 /*
 966  * XXX merging of errors in this routine needs to be improved
 967  */
 968 int
 969 ldap_chase_referrals( LDAP *ld,
 970         LDAPRequest *lr,
 971         char **errstrp,
 972         int sref,
 973         int *hadrefp )
 974 {
 975         int             rc, count, id;
 976         unsigned        len;
 977         char            *p, *ref, *unfollowed;
 978         LDAPRequest     *origreq;
 979         LDAPURLDesc     *srv;
 980         BerElement      *ber;
 981         LDAPreqinfo  rinfo;
 982
 983 #ifdef NEW_LOGGING
 984         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_referrals\n", 0, 0, 0 );
 985 #else
 986         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 987 #endif
 988
 989         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 990         *hadrefp = 0;
 991
 992         if ( *errstrp == NULL ) {
 993                 return( 0 );
 994         }
 995
 996         len = strlen( *errstrp );
 997         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
 998                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
 999                         *p = '\0';
1000                         p += LDAP_REF_STR_LEN;
1001                         break;
1002                 }
1003         }
1004
1005         if ( len < LDAP_REF_STR_LEN ) {
1006                 return( 0 );
1007         }
1008
1009         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1010 #ifdef NEW_LOGGING
1011                 LDAP_LOG ( OPERATION, ENTRY,
1012                         "ldap_chase_referrals: more than %d referral hops (dropping)\n",
1013                         ld->ld_refhoplimit, 0, 0 );
1014 #else
1015                 Debug( LDAP_DEBUG_ANY,
1016                     "more than %d referral hops (dropping)\n",
1017                     ld->ld_refhoplimit, 0, 0 );
1018 #endif
1019                     /* XXX report as error in ld->ld_errno? */
1020                     return( 0 );
1021         }
1022
1023         /* find original request */
1024         for ( origreq = lr; origreq->lr_parent != NULL;
1025              origreq = origreq->lr_parent ) {
1026                 /* empty */;
1027         }
1028
1029         unfollowed = NULL;
1030         rc = count = 0;
1031
1032         /* parse out & follow referrals */
1033         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1034                 if (( p = strchr( ref, '\n' )) != NULL ) {
1035                         *p++ = '\0';
1036                 } else {
1037                         p = NULL;
1038                 }
1039
1040                 rc = ldap_url_parse_ext( ref, &srv );
1041
1042                 if ( rc != LDAP_URL_SUCCESS ) {
1043 #ifdef NEW_LOGGING
1044                         LDAP_LOG ( OPERATION, DETAIL1,
1045                                 "ldap_chase_referrals: ignoring unknown referral <%s>\n",
1046                                 ref, 0, 0 );
1047 #else
1048                         Debug( LDAP_DEBUG_TRACE,
1049                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1050 #endif
1051                         rc = ldap_append_referral( ld, &unfollowed, ref );
1052                         *hadrefp = 1;
1053                         continue;
1054                 }
1055
1056                 if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1057                         LDAP_FREE( srv->lud_dn );
1058                         srv->lud_dn = NULL;
1059                 }
1060
1061 #ifdef NEW_LOGGING
1062                 LDAP_LOG ( OPERATION, DETAIL1,
1063                         "ldap_chase_referrals: chasing LDAP referral <%s>\n", ref, 0, 0 );
1064 #else
1065                 Debug( LDAP_DEBUG_TRACE,
1066                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1067 #endif
1068
1069                 *hadrefp = 1;
1070
1071                 LDAP_NEXT_MSGID( ld, id );
1072                 ber = re_encode_request( ld, origreq->lr_ber,
1073                     id, sref, srv, &rinfo.ri_request );
1074
1075                 if( ber == NULL ) {
1076                         return -1 ;
1077                 }
1078
1079                 /* copy the complete referral for rebind process */
1080                 rinfo.ri_url = LDAP_STRDUP( ref );
1081
1082                 rinfo.ri_msgid = origreq->lr_origid;
1083
1084 #ifdef LDAP_R_COMPILE
1085         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1086 #endif
1087                 rc = ldap_send_server_request( ld, ber, id,
1088                     lr, srv, NULL, &rinfo );
1089 #ifdef LDAP_R_COMPILE
1090         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1091 #endif
1092
1093                 LDAP_FREE( rinfo.ri_url );
1094
1095                 if( rc >= 0 ) {
1096                         ++count;
1097                 } else {
1098 #ifdef NEW_LOGGING
1099                         LDAP_LOG ( OPERATION, ERR,
1100                                 "ldap_chase_referrals: Unable to chase referral <%s>\n",
1101                                 ldap_err2string( ld->ld_errno), 0, 0 );
1102 #else
1103                         Debug( LDAP_DEBUG_ANY,
1104                             "Unable to chase referral (%s)\n",
1105                             ldap_err2string( ld->ld_errno ), 0, 0 );
1106 #endif
1107                         rc = ldap_append_referral( ld, &unfollowed, ref );
1108                 }
1109
1110                 ldap_free_urllist(srv);
1111         }
1112
1113         LDAP_FREE( *errstrp );
1114         *errstrp = unfollowed;
1115
1116         return(( rc == 0 ) ? count : rc );
1117 }
1118
1119
1120 int
1121 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1122 {
1123         int     first;
1124
1125         if ( *referralsp == NULL ) {
1126                 first = 1;
1127                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1128                     + 1 );
1129         } else {
1130                 first = 0;
1131                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1132                     strlen( *referralsp ) + strlen( s ) + 2 );
1133         }
1134
1135         if ( *referralsp == NULL ) {
1136                 ld->ld_errno = LDAP_NO_MEMORY;
1137                 return( -1 );
1138         }
1139
1140         if ( first ) {
1141                 strcpy( *referralsp, LDAP_REF_STR );
1142         } else {
1143                 strcat( *referralsp, "\n" );
1144         }
1145         strcat( *referralsp, s );
1146
1147         return( 0 );
1148 }
1149
1150
1151
1152 static BerElement *
1153 re_encode_request( LDAP *ld,
1154         BerElement *origber,
1155         ber_int_t msgid,
1156         int sref,
1157         LDAPURLDesc *srv,
1158         int *type )
1159 {
1160         /*
1161          * XXX this routine knows way too much about how the lber library works!
1162          */
1163         ber_int_t       along;
1164         ber_tag_t       tag;
1165         ber_tag_t       rtag;
1166         ber_int_t       ver;
1167         ber_int_t       scope;
1168         int             rc;
1169         BerElement      tmpber, *ber;
1170         char            *orig_dn;
1171         char            *dn;
1172
1173 #ifdef NEW_LOGGING
1174         LDAP_LOG ( OPERATION, ARGS,
1175                 "re_encode_request: new msgid %ld, new dn <%s>\n",
1176                 (long) msgid,
1177                 ( srv == NULL || srv->lud_dn == NULL ) ? "NONE" : srv->lud_dn, 0 );
1178 #else
1179         Debug( LDAP_DEBUG_TRACE,
1180             "re_encode_request: new msgid %ld, new dn <%s>\n",
1181             (long) msgid,
1182                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1183 #endif
1184
1185         tmpber = *origber;
1186
1187         /*
1188          * all LDAP requests are sequences that start with a message id.
1189          * For all except delete, this is followed by a sequence that is
1190          * tagged with the operation code.  For delete, the provided DN
1191          * is not wrapped by a sequence.
1192          */
1193         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1194
1195         if ( rtag == LBER_ERROR ) {
1196                 ld->ld_errno = LDAP_DECODING_ERROR;
1197                 return( NULL );
1198         }
1199
1200         assert( tag != 0);
1201         if ( tag == LDAP_REQ_BIND ) {
1202                 /* bind requests have a version number before the DN & other stuff */
1203                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1204
1205         } else if ( tag == LDAP_REQ_DELETE ) {
1206                 /* delete requests don't have a DN wrapping sequence */
1207                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1208
1209         } else if ( tag == LDAP_REQ_SEARCH ) {
1210                 /* search requests need to be re-scope-ed */
1211                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1212
1213                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1214                         /* use the scope provided in reference */
1215                         scope = srv->lud_scope;
1216
1217                 } else if ( sref ) {
1218                         /* use scope implied by previous operation
1219                          *   base -> base
1220                          *   one -> base
1221                          *   subtree -> subtree
1222                          *   subordinate -> subtree
1223                          */
1224                         switch( scope ) {
1225                         default:
1226                         case LDAP_SCOPE_BASE:
1227                         case LDAP_SCOPE_ONELEVEL:
1228                                 scope = LDAP_SCOPE_BASE;
1229                                 break;
1230                         case LDAP_SCOPE_SUBTREE:
1231 #ifdef LDAP_FEATURE_SUBORDINATE_SCOPE
1232                         case LDAP_SCOPE_SUBORDINATE:
1233 #endif
1234                                 scope = LDAP_SCOPE_SUBTREE;
1235                                 break;
1236                         }
1237                 }
1238
1239         } else {
1240                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1241         }
1242
1243         if( rtag == LBER_ERROR ) {
1244                 ld->ld_errno = LDAP_DECODING_ERROR;
1245                 return NULL;
1246         }
1247
1248         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1249                 return NULL;
1250         }
1251
1252         if ( srv->lud_dn == NULL ) {
1253                 dn = orig_dn;
1254         } else {
1255                 dn = srv->lud_dn;
1256         }
1257
1258         if ( tag == LDAP_REQ_BIND ) {
1259                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1260         } else if ( tag == LDAP_REQ_DELETE ) {
1261                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1262         } else if ( tag == LDAP_REQ_SEARCH ) {
1263                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1264         } else {
1265                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1266         }
1267
1268         LDAP_FREE( orig_dn );
1269
1270         if ( rc == -1 ) {
1271                 ld->ld_errno = LDAP_ENCODING_ERROR;
1272                 ber_free( ber, 1 );
1273                 return NULL;
1274         }
1275
1276         if ( tag != LDAP_REQ_DELETE && (
1277                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1278                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1279             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1280         {
1281                 ld->ld_errno = LDAP_ENCODING_ERROR;
1282                 ber_free( ber, 1 );
1283                 return NULL;
1284         }
1285
1286 #ifdef LDAP_DEBUG
1287         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1288 #ifdef NEW_LOGGING
1289                 LDAP_LOG ( OPERATION, DETAIL1,
1290                         "re_encode_request: new request is:\n", 0, 0, 0 );
1291 #else
1292                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1293                     0, 0, 0 );
1294 #endif
1295                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1296         }
1297 #endif /* LDAP_DEBUG */
1298
1299         *type = tag;    /* return request type */
1300         return ber;
1301 }
1302
1303
1304 LDAPRequest *
1305 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1306 {
1307         LDAPRequest     *lr;
1308
1309 #ifdef LDAP_R_COMPILE
1310         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1311 #endif
1312         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1313                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1314                         continue;       /* Skip completed requests */
1315                 }
1316                 if ( msgid == lr->lr_msgid ) {
1317                         break;
1318                 }
1319         }
1320 #ifdef LDAP_R_COMPILE
1321         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1322 #endif
1323
1324         return( lr );
1325 }
1326
1327