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 1998-2005 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 static void ldap_free_request_int LDAP_P(( LDAP *ld, LDAPRequest *lr ));
  59
  60 static BerElement *
  61 re_encode_request( LDAP *ld,
  62         BerElement *origber,
  63         ber_int_t msgid,
  64         int sref,
  65         LDAPURLDesc *srv,
  66         int *type );
  67
  68 BerElement *
  69 ldap_alloc_ber_with_options( LDAP *ld )
  70 {
  71         BerElement      *ber;
  72
  73     if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
  74                 ld->ld_errno = LDAP_NO_MEMORY;
  75         }
  76
  77         return( ber );
  78 }
  79
  80
  81 void
  82 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  83 {
  84         ber->ber_options = ld->ld_lberoptions;
  85 }
  86
  87
  88 ber_int_t
  89 ldap_send_initial_request(
  90         LDAP *ld,
  91         ber_tag_t msgtype,
  92         const char *dn,
  93         BerElement *ber,
  94         ber_int_t msgid)
  95 {
  96         LDAPURLDesc     *servers;
  97         int rc;
  98
  99         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
 100
 101         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 102                 /* not connected yet */
 103                 int rc = ldap_open_defconn( ld );
 104
 105                 if( rc < 0 ) {
 106                         ber_free( ber, 1 );
 107                         return( -1 );
 108                 }
 109
 110                 Debug( LDAP_DEBUG_TRACE,
 111                         "ldap_open_defconn: successful\n",
 112                         0, 0, 0 );
 113         }
 114
 115         {
 116                 /*
 117                  * use of DNS is turned off or this is an X.500 DN...
 118                  * use our default connection
 119                  */
 120                 servers = NULL;
 121         }
 122
 123 #ifdef LDAP_CONNECTIONLESS
 124         if (LDAP_IS_UDP(ld)) {
 125                 if (msgtype == LDAP_REQ_BIND) {
 126                         if (ld->ld_options.ldo_cldapdn)
 127                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 128                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 129                         return 0;
 130                 }
 131                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 132                         return LDAP_PARAM_ERROR;
 133         }
 134 #endif
 135 #ifdef LDAP_R_COMPILE
 136         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 137 #endif
 138         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 139                 servers, NULL, NULL );
 140 #ifdef LDAP_R_COMPILE
 141         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 142 #endif
 143         if (servers)
 144                 ldap_free_urllist(servers);
 145         return(rc);
 146 }
 147
 148
 149 int
 150 ldap_int_flush_request(
 151         LDAP *ld,
 152         LDAPRequest *lr )
 153 {
 154         LDAPConn *lc = lr->lr_conn;
 155
 156         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 157                 if ( errno == EAGAIN ) {
 158                         /* need to continue write later */
 159                         lr->lr_status = LDAP_REQST_WRITING;
 160                         ldap_mark_select_write( ld, lc->lconn_sb );
 161                         ld->ld_errno = LDAP_BUSY;
 162                         return -2;
 163                 } else {
 164                         ld->ld_errno = LDAP_SERVER_DOWN;
 165                         ldap_free_request( ld, lr );
 166                         ldap_free_connection( ld, lc, 0, 0 );
 167                         return( -1 );
 168                 }
 169         } else {
 170                 if ( lr->lr_parent == NULL ) {
 171                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 172                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 173                 }
 174                 lr->lr_status = LDAP_REQST_INPROGRESS;
 175
 176                 /* sent -- waiting for a response */
 177                 ldap_mark_select_read( ld, lc->lconn_sb );
 178         }
 179         return 0;
 180 }
 181
 182 int
 183 ldap_send_server_request(
 184         LDAP *ld,
 185         BerElement *ber,
 186         ber_int_t msgid,
 187         LDAPRequest *parentreq,
 188         LDAPURLDesc *srvlist,
 189         LDAPConn *lc,
 190         LDAPreqinfo *bind )
 191 {
 192         LDAPRequest     *lr;
 193         int incparent, rc;
 194
 195         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 196
 197         incparent = 0;
 198         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 199
 200         if ( lc == NULL ) {
 201                 if ( srvlist == NULL ) {
 202                         lc = ld->ld_defconn;
 203                 } else {
 204                         lc = find_connection( ld, srvlist, 1 );
 205                         if ( lc == NULL ) {
 206                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 207                                         /* Remember the bind in the parent */
 208                                         incparent = 1;
 209                                         ++parentreq->lr_outrefcnt;
 210                                 }
 211                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 212                         }
 213                 }
 214         }
 215
 216         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 217                 ber_free( ber, 1 );
 218                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 219                         ld->ld_errno = LDAP_SERVER_DOWN;
 220                 }
 221                 if ( incparent ) {
 222                         /* Forget about the bind */
 223                         --parentreq->lr_outrefcnt;
 224                 }
 225                 return( -1 );
 226         }
 227
 228         use_connection( ld, lc );
 229
 230         /* If we still have an incomplete write, try to finish it before
 231          * dealing with the new request. If we don't finish here, return
 232          * LDAP_BUSY and let the caller retry later. We only allow a single
 233          * request to be in WRITING state.
 234          */
 235         rc = 0;
 236         if ( ld->ld_requests &&
 237                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 238                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
 239         {
 240                 rc = -1;
 241         }
 242         if ( rc ) return rc;
 243
 244         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
 245         if ( lr == NULL ) {
 246                 ld->ld_errno = LDAP_NO_MEMORY;
 247                 ldap_free_connection( ld, lc, 0, 0 );
 248                 ber_free( ber, 1 );
 249                 if ( incparent ) {
 250                         /* Forget about the bind */
 251                         --parentreq->lr_outrefcnt;
 252                 }
 253                 return( -1 );
 254         }
 255         lr->lr_msgid = msgid;
 256         lr->lr_status = LDAP_REQST_INPROGRESS;
 257         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 258         lr->lr_ber = ber;
 259         lr->lr_conn = lc;
 260         if ( parentreq != NULL ) {      /* sub-request */
 261                 if ( !incparent ) {
 262                         /* Increment if we didn't do it before the bind */
 263                         ++parentreq->lr_outrefcnt;
 264                 }
 265                 lr->lr_origid = parentreq->lr_origid;
 266                 lr->lr_parentcnt = ++parentreq->lr_parentcnt;
 267                 lr->lr_parent = parentreq;
 268                 lr->lr_refnext = parentreq->lr_child;
 269                 parentreq->lr_child = lr;
 270         } else {                        /* original request */
 271                 lr->lr_origid = lr->lr_msgid;
 272         }
 273
 274         lr->lr_prev = NULL;
 275         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 276                 lr->lr_next->lr_prev = lr;
 277         }
 278         ld->ld_requests = lr;
 279
 280         ld->ld_errno = LDAP_SUCCESS;
 281         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 282                 msgid = -1;
 283         }
 284
 285         return( msgid );
 286 }
 287
 288 LDAPConn *
 289 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 290         int connect, LDAPreqinfo *bind )
 291 {
 292         LDAPConn        *lc;
 293         LDAPURLDesc     *srv;
 294
 295         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
 296                 use_ldsb, connect, (bind != NULL) );
 297         /*
 298          * make a new LDAP server connection
 299          * XXX open connection synchronously for now
 300          */
 301         lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
 302         if ( lc == NULL ) {
 303                 ld->ld_errno = LDAP_NO_MEMORY;
 304                 return( NULL );
 305         }
 306
 307         if ( use_ldsb ) {
 308                 assert( ld->ld_sb != NULL );
 309                 lc->lconn_sb = ld->ld_sb;
 310
 311         } else {
 312                 lc->lconn_sb = ber_sockbuf_alloc();
 313                 if ( lc->lconn_sb == NULL ) {
 314                         LDAP_FREE( (char *)lc );
 315                         ld->ld_errno = LDAP_NO_MEMORY;
 316                         return( NULL );
 317                 }
 318         }
 319
 320         if ( connect ) {
 321                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 322                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 )
 323                         {
 324                                 break;
 325                         }
 326                 }
 327
 328                 if ( srv == NULL ) {
 329                         if ( !use_ldsb ) {
 330                                 ber_sockbuf_free( lc->lconn_sb );
 331                         }
 332                         LDAP_FREE( (char *)lc );
 333                         ld->ld_errno = LDAP_SERVER_DOWN;
 334                         return( NULL );
 335                 }
 336
 337                 lc->lconn_server = ldap_url_dup( srv );
 338         }
 339
 340         lc->lconn_status = LDAP_CONNST_CONNECTED;
 341         lc->lconn_next = ld->ld_conns;
 342         ld->ld_conns = lc;
 343
 344         /*
 345          * XXX for now, we always do a synchronous bind.  This will have
 346          * to change in the long run...
 347          */
 348         if ( bind != NULL) {
 349                 int             err = 0;
 350                 LDAPConn        *savedefconn;
 351
 352                 /* Set flag to prevent additional referrals
 353                  * from being processed on this
 354                  * connection until the bind has completed
 355                  */
 356                 lc->lconn_rebind_inprogress = 1;
 357                 /* V3 rebind function */
 358                 if ( ld->ld_rebind_proc != NULL) {
 359                         LDAPURLDesc     *srvfunc;
 360
 361                         srvfunc = ldap_url_dup( srvlist );
 362                         if ( srvfunc == NULL ) {
 363                                 ld->ld_errno = LDAP_NO_MEMORY;
 364                                 err = -1;
 365                         } else {
 366                                 savedefconn = ld->ld_defconn;
 367                                 ++lc->lconn_refcnt;     /* avoid premature free */
 368                                 ld->ld_defconn = lc;
 369
 370                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 371 #ifdef LDAP_R_COMPILE
 372                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 373                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 374 #endif
 375                                 err = (*ld->ld_rebind_proc)( ld,
 376                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 377                                         ld->ld_rebind_params );
 378 #ifdef LDAP_R_COMPILE
 379                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 380                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 381 #endif
 382
 383                                 ld->ld_defconn = savedefconn;
 384                                 --lc->lconn_refcnt;
 385
 386                                 if ( err != 0 ) {
 387                                         err = -1;
 388                                         ldap_free_connection( ld, lc, 1, 0 );
 389                                         lc = NULL;
 390                                 }
 391                                 ldap_free_urldesc( srvfunc );
 392                         }
 393                 } else {
 394                         savedefconn = ld->ld_defconn;
 395                         ++lc->lconn_refcnt;     /* avoid premature free */
 396                         ld->ld_defconn = lc;
 397
 398                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 399 #ifdef LDAP_R_COMPILE
 400                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 401                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 402 #endif
 403                         if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
 404                                 err = -1;
 405                         }
 406 #ifdef LDAP_R_COMPILE
 407                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 408                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 409 #endif
 410                         ld->ld_defconn = savedefconn;
 411                         --lc->lconn_refcnt;
 412
 413                         if ( err != 0 ) {
 414                                 ldap_free_connection( ld, lc, 1, 0 );
 415                                 lc = NULL;
 416                         }
 417                 }
 418                 if ( lc != NULL )
 419                         lc->lconn_rebind_inprogress = 0;
 420         }
 421
 422         return( lc );
 423 }
 424
 425
 426 static LDAPConn *
 427 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 428 /*
 429  * return an existing connection (if any) to the server srv
 430  * if "any" is non-zero, check for any server in the "srv" chain
 431  */
 432 {
 433         LDAPConn        *lc;
 434         LDAPURLDesc     *lcu, *lsu;
 435         int lcu_port, lsu_port;
 436
 437         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 438                 lcu = lc->lconn_server;
 439                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 440                         lcu->lud_port );
 441
 442                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 443                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 444                                 lsu->lud_port );
 445
 446                         if ( strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 447                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 448                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 449                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0
 450                             && lsu_port == lcu_port )
 451                         {
 452                                 return lc;
 453                         }
 454
 455                         if ( !any ) break;
 456                 }
 457         }
 458
 459         return NULL;
 460 }
 461
 462
 463
 464 static void
 465 use_connection( LDAP *ld, LDAPConn *lc )
 466 {
 467         ++lc->lconn_refcnt;
 468         lc->lconn_lastused = time( NULL );
 469 }
 470
 471
 472 void
 473 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 474 {
 475         LDAPConn        *tmplc, *prevlc;
 476
 477         Debug( LDAP_DEBUG_TRACE,
 478                 "ldap_free_connection %d %d\n",
 479                 force, unbind, 0 );
 480
 481         if ( force || --lc->lconn_refcnt <= 0 ) {
 482                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 483                         ldap_mark_select_clear( ld, lc->lconn_sb );
 484                         if ( unbind ) {
 485                                 ldap_send_unbind( ld, lc->lconn_sb,
 486                                                 NULL, NULL );
 487                         }
 488                 }
 489
 490                 if ( lc->lconn_ber != NULL ) {
 491                         ber_free( lc->lconn_ber, 1 );
 492                 }
 493
 494                 ldap_int_sasl_close( ld, lc );
 495
 496                 prevlc = NULL;
 497                 for ( tmplc = ld->ld_conns;
 498                         tmplc != NULL;
 499                         tmplc = tmplc->lconn_next )
 500                 {
 501                         if ( tmplc == lc ) {
 502                                 if ( prevlc == NULL ) {
 503                                     ld->ld_conns = tmplc->lconn_next;
 504                                 } else {
 505                                     prevlc->lconn_next = tmplc->lconn_next;
 506                                 }
 507                                 break;
 508                         }
 509                         prevlc = tmplc;
 510                 }
 511                 ldap_free_urllist( lc->lconn_server );
 512 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 513                 if ( lc->lconn_krbinstance != NULL ) {
 514                         LDAP_FREE( lc->lconn_krbinstance );
 515                 }
 516 #endif
 517
 518                 /* FIXME: is this at all possible? */
 519                 if ( force ) {
 520                         LDAPRequest     *lr;
 521
 522                         for ( lr = ld->ld_requests; lr; ) {
 523                                 LDAPRequest     *lr_next = lr->lr_next;
 524
 525                                 if ( lr->lr_conn == lc ) {
 526                                         ldap_free_request_int( ld, lr );
 527                                 }
 528
 529                                 lr = lr_next;
 530                         }
 531                 }
 532                 if ( lc->lconn_sb != ld->ld_sb ) {
 533                         ber_sockbuf_free( lc->lconn_sb );
 534                 }
 535                 if ( lc->lconn_rebind_queue != NULL) {
 536                         int i;
 537                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 538                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 539                         }
 540                         LDAP_FREE( lc->lconn_rebind_queue );
 541                 }
 542                 LDAP_FREE( lc );
 543                 Debug( LDAP_DEBUG_TRACE,
 544                         "ldap_free_connection: actually freed\n",
 545                         0, 0, 0 );
 546         } else {
 547                 lc->lconn_lastused = time( NULL );
 548                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 549                                 lc->lconn_refcnt, 0, 0 );
 550         }
 551 }
 552
 553
 554 #ifdef LDAP_DEBUG
 555 void
 556 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 557 {
 558         LDAPConn        *lc;
 559         char            timebuf[32];
 560
 561         fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
 562         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 563                 if ( lc->lconn_server != NULL ) {
 564                         fprintf( stderr, "* host: %s  port: %d%s\n",
 565                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 566                             : lc->lconn_server->lud_host,
 567                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 568                             ld->ld_sb ) ? "  (default)" : "" );
 569                 }
 570                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 571                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 572                     "NeedSocket" : ( lc->lconn_status ==
 573                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 574                 fprintf( stderr, "  last used: %s",
 575                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 576                 if( lc->lconn_rebind_inprogress ) {
 577                         fprintf( stderr, "  rebind in progress\n");
 578                         if( lc->lconn_rebind_queue != NULL) {
 579                                 int i = 0;
 580                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 581                                         int j = 0;
 582                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 583                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 584                                                         i, j, lc->lconn_rebind_queue[i][j]);
 585                                         }
 586                                 }
 587                         } else {
 588                                 fprintf( stderr, "    queue is empty\n");
 589                         }
 590                 }
 591                 fprintf(stderr, "\n");
 592                 if ( !all ) {
 593                         break;
 594                 }
 595         }
 596 }
 597
 598
 599 void
 600 ldap_dump_requests_and_responses( LDAP *ld )
 601 {
 602         LDAPRequest     *lr;
 603         LDAPMessage     *lm, *l;
 604
 605 #ifdef LDAP_R_COMPILE
 606         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 607 #endif
 608         fprintf( stderr, "** Outstanding Requests:\n" );
 609         if (( lr = ld->ld_requests ) == NULL ) {
 610                 fprintf( stderr, "   Empty\n" );
 611         }
 612         for ( ; lr != NULL; lr = lr->lr_next ) {
 613             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 614                 lr->lr_msgid, lr->lr_origid,
 615                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 616                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 617                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 618                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 619                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
 620             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 621                     lr->lr_outrefcnt, lr->lr_parentcnt );
 622         }
 623 #ifdef LDAP_R_COMPILE
 624         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 625 #endif
 626         fprintf( stderr, "** Response Queue:\n" );
 627         if (( lm = ld->ld_responses ) == NULL ) {
 628                 fprintf( stderr, "   Empty\n" );
 629         }
 630         for ( ; lm != NULL; lm = lm->lm_next ) {
 631                 fprintf( stderr, " * msgid %d,  type %lu\n",
 632                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 633                 if (( l = lm->lm_chain ) != NULL ) {
 634                         fprintf( stderr, "   chained responses:\n" );
 635                         for ( ; l != NULL; l = l->lm_chain ) {
 636                                 fprintf( stderr,
 637                                     "  * msgid %d,  type %lu\n",
 638                                     l->lm_msgid,
 639                                     (unsigned long) l->lm_msgtype );
 640                         }
 641                 }
 642         }
 643 }
 644 #endif /* LDAP_DEBUG */
 645
 646 static void
 647 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 648 {
 649         if ( lr->lr_prev == NULL ) {
 650                 /* free'ing the first request? */
 651                 assert( ld->ld_requests == lr );
 652                 ld->ld_requests = lr->lr_next;
 653
 654         } else {
 655                 lr->lr_prev->lr_next = lr->lr_next;
 656         }
 657
 658         if ( lr->lr_next != NULL ) {
 659                 lr->lr_next->lr_prev = lr->lr_prev;
 660         }
 661
 662         if ( lr->lr_ber != NULL ) {
 663                 ber_free( lr->lr_ber, 1 );
 664         }
 665
 666         if ( lr->lr_res_error != NULL ) {
 667                 LDAP_FREE( lr->lr_res_error );
 668         }
 669
 670         if ( lr->lr_res_matched != NULL ) {
 671                 LDAP_FREE( lr->lr_res_matched );
 672         }
 673
 674         LDAP_FREE( lr );
 675 }
 676
 677 void
 678 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 679 {
 680         LDAPRequest     **ttmplr;
 681
 682         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 683                 lr->lr_origid, lr->lr_msgid, 0 );
 684
 685         /* free all referrals (child requests) */
 686         while ( lr->lr_child )
 687                 ldap_free_request( ld, lr->lr_child );
 688
 689         if ( lr->lr_parent != NULL ) {
 690                 --lr->lr_parent->lr_outrefcnt;
 691                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 692                 if ( *ttmplr == lr )
 693                         *ttmplr = lr->lr_refnext;
 694         }
 695         ldap_free_request_int( ld, lr );
 696 }
 697
 698 /*
 699  * call first time with *cntp = -1
 700  * when returns *cntp == -1, no referrals are left
 701  *
 702  * NOTE: may replace *refsp, or shuffle the contents
 703  * of the original array.
 704  */
 705 static int ldap_int_nextref(
 706         LDAP                    *ld,
 707         char                    ***refsp,
 708         int                     *cntp,
 709         void                    *params )
 710 {
 711         assert( refsp != NULL );
 712         assert( *refsp != NULL );
 713         assert( cntp != NULL );
 714
 715         if ( *cntp < -1 ) {
 716                 *cntp = -1;
 717                 return -1;
 718         }
 719
 720         (*cntp)++;
 721
 722         if ( (*refsp)[ *cntp ] == NULL ) {
 723                 *cntp = -1;
 724         }
 725
 726         return 0;
 727 }
 728
 729 /*
 730  * Chase v3 referrals
 731  *
 732  * Parameters:
 733  *  (IN) ld = LDAP connection handle
 734  *  (IN) lr = LDAP Request structure
 735  *  (IN) refs = array of pointers to referral strings that we will chase
 736  *              The array will be free'd by this function when no longer needed
 737  *  (IN) sref != 0 if following search reference
 738  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 739  *  (OUT) hadrefp = 1 if sucessfully followed referral
 740  *
 741  * Return value - number of referrals followed
 742  */
 743 int
 744 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 745 {
 746         char            *unfollowed;
 747         int              unfollowedcnt = 0;
 748         LDAPRequest     *origreq;
 749         LDAPURLDesc     *srv = NULL;
 750         BerElement      *ber;
 751         char            **refarray = NULL;
 752         LDAPConn        *lc;
 753         int                      rc, count, i, j, id;
 754         LDAPreqinfo  rinfo;
 755
 756         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 757         *hadrefp = 0;
 758
 759         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 760
 761         unfollowed = NULL;
 762         rc = count = 0;
 763
 764         /* If no referrals in array, return */
 765         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 766                 rc = 0;
 767                 goto done;
 768         }
 769
 770         /* Check for hop limit exceeded */
 771         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 772                 Debug( LDAP_DEBUG_ANY,
 773                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 774                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 775             rc = -1;
 776                 goto done;
 777         }
 778
 779         /* find original request */
 780         for ( origreq = lr;
 781                 origreq->lr_parent != NULL;
 782                 origreq = origreq->lr_parent )
 783         {
 784                 /* empty */ ;
 785         }
 786
 787         refarray = refs;
 788         refs = NULL;
 789
 790         if ( ld->ld_nextref_proc == NULL ) {
 791                 ld->ld_nextref_proc = ldap_int_nextref;
 792         }
 793
 794         /* parse out & follow referrals */
 795         i = -1;
 796         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 797                         i != -1;
 798                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 799         {
 800
 801                 /* Parse the referral URL */
 802                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 803                         ld->ld_errno = rc;
 804                         rc = -1;
 805                         goto done;
 806                 }
 807
 808                 if( srv->lud_crit_exts ) {
 809                         /* we do not support any extensions */
 810                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 811                         rc = -1;
 812                         goto done;
 813                 }
 814
 815                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 816                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 817                         LDAP_FREE( srv->lud_dn );
 818                         srv->lud_dn = NULL;
 819                 }
 820
 821                 /* check connection for re-bind in progress */
 822                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 823                         if( lc->lconn_rebind_inprogress) {
 824                                 /* We are already chasing a referral or search reference and a
 825                                  * bind on that connection is in progress.  We must queue
 826                                  * referrals on that connection, so we don't get a request
 827                                  * going out before the bind operation completes. This happens
 828                                  * if two search references come in one behind the other
 829                                  * for the same server with different contexts.
 830                                  */
 831                                 Debug( LDAP_DEBUG_TRACE,
 832                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 833                                         refarray[i], 0, 0);
 834                                 if( lc->lconn_rebind_queue == NULL ) {
 835                                         /* Create a referral list */
 836                                         lc->lconn_rebind_queue =
 837                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 838
 839                                         if( lc->lconn_rebind_queue == NULL) {
 840                                                 ld->ld_errno = LDAP_NO_MEMORY;
 841                                                 rc = -1;
 842                                                 goto done;
 843                                         }
 844
 845                                         lc->lconn_rebind_queue[0] = refarray;
 846                                         lc->lconn_rebind_queue[1] = NULL;
 847                                         refarray = NULL;
 848
 849                                 } else {
 850                                         /* Count how many referral arrays we already have */
 851                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 852                                                 /* empty */;
 853                                         }
 854
 855                                         /* Add the new referral to the list */
 856                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 857                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 858
 859                                         if( lc->lconn_rebind_queue == NULL ) {
 860                                                 ld->ld_errno = LDAP_NO_MEMORY;
 861                                                 rc = -1;
 862                                                 goto done;
 863                                         }
 864                                         lc->lconn_rebind_queue[j] = refarray;
 865                                         lc->lconn_rebind_queue[j+1] = NULL;
 866                                         refarray = NULL;
 867                                 }
 868
 869                                 /* We have queued the referral/reference, now just return */
 870                                 rc = 0;
 871                                 *hadrefp = 1;
 872                                 count = 1; /* Pretend we already followed referral */
 873                                 goto done;
 874                         }
 875                 }
 876                 /* Re-encode the request with the new starting point of the search.
 877                  * Note: In the future we also need to replace the filter if one
 878                  * was provided with the search reference
 879                  */
 880
 881                 /* For references we don't want old dn if new dn empty */
 882                 if ( sref && srv->lud_dn == NULL ) {
 883                         srv->lud_dn = LDAP_STRDUP( "" );
 884                 }
 885
 886                 LDAP_NEXT_MSGID( ld, id );
 887                 ber = re_encode_request( ld, origreq->lr_ber, id,
 888                         sref, srv, &rinfo.ri_request );
 889
 890                 if( ber == NULL ) {
 891                         ld->ld_errno = LDAP_ENCODING_ERROR;
 892                         rc = -1;
 893                         goto done;
 894                 }
 895
 896                 Debug( LDAP_DEBUG_TRACE,
 897                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 898                         lr->lr_msgid, refarray[i], 0);
 899
 900                 /* Send the new request to the server - may require a bind */
 901                 rinfo.ri_msgid = origreq->lr_origid;
 902                 rinfo.ri_url = refarray[i];
 903 #ifdef LDAP_R_COMPILE
 904                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 905 #endif
 906                 rc = ldap_send_server_request( ld, ber, id,
 907                         origreq, srv, NULL, &rinfo );
 908 #ifdef LDAP_R_COMPILE
 909                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 910 #endif
 911                 if ( rc < 0 ) {
 912                         /* Failure, try next referral in the list */
 913                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%d: %s)\n",
 914                                 refarray[i], ld->ld_errno, ldap_err2string( ld->ld_errno ) );
 915                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i] );
 916                         ldap_free_urllist( srv );
 917                         srv = NULL;
 918                 } else {
 919                         /* Success, no need to try this referral list further */
 920                         rc = 0;
 921                         ++count;
 922                         *hadrefp = 1;
 923
 924                         /* check if there is a queue of referrals that came in during bind */
 925                         if ( lc == NULL) {
 926                                 lc = find_connection( ld, srv, 1 );
 927                                 if ( lc == NULL ) {
 928                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 929                                         rc = -1;
 930                                         goto done;
 931                                 }
 932                         }
 933
 934                         if ( lc->lconn_rebind_queue != NULL ) {
 935                                 /* Release resources of previous list */
 936                                 LDAP_VFREE( refarray );
 937                                 refarray = NULL;
 938                                 ldap_free_urllist( srv );
 939                                 srv = NULL;
 940
 941                                 /* Pull entries off end of queue so list always null terminated */
 942                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++ )
 943                                         ;
 944                                 refarray = lc->lconn_rebind_queue[j - 1];
 945                                 lc->lconn_rebind_queue[j-1] = NULL;
 946                                 /* we pulled off last entry from queue, free queue */
 947                                 if ( j == 1 ) {
 948                                         LDAP_FREE( lc->lconn_rebind_queue );
 949                                         lc->lconn_rebind_queue = NULL;
 950                                 }
 951                                 /* restart the loop the with new referral list */
 952                                 i = -1;
 953                                 continue;
 954                         }
 955                         break; /* referral followed, break out of for loop */
 956                 }
 957         } /* end for loop */
 958 done:
 959         LDAP_VFREE( refarray );
 960         ldap_free_urllist( srv );
 961         LDAP_FREE( *errstrp );
 962
 963         if( rc == 0 ) {
 964                 *errstrp = NULL;
 965                 LDAP_FREE( unfollowed );
 966                 return count;
 967         } else {
 968                 ld->ld_errno = LDAP_REFERRAL;
 969                 *errstrp = unfollowed;
 970                 return rc;
 971         }
 972 }
 973
 974 /*
 975  * XXX merging of errors in this routine needs to be improved
 976  */
 977 int
 978 ldap_chase_referrals( LDAP *ld,
 979         LDAPRequest *lr,
 980         char **errstrp,
 981         int sref,
 982         int *hadrefp )
 983 {
 984         int             rc, count, id;
 985         unsigned        len;
 986         char            *p, *ref, *unfollowed;
 987         LDAPRequest     *origreq;
 988         LDAPURLDesc     *srv;
 989         BerElement      *ber;
 990         LDAPreqinfo  rinfo;
 991
 992         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 993
 994         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 995         *hadrefp = 0;
 996
 997         if ( *errstrp == NULL ) {
 998                 return( 0 );
 999         }
1000
1001         len = strlen( *errstrp );
1002         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1003                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1004                         *p = '\0';
1005                         p += LDAP_REF_STR_LEN;
1006                         break;
1007                 }
1008         }
1009
1010         if ( len < LDAP_REF_STR_LEN ) {
1011                 return( 0 );
1012         }
1013
1014         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1015                 Debug( LDAP_DEBUG_ANY,
1016                     "more than %d referral hops (dropping)\n",
1017                     ld->ld_refhoplimit, 0, 0 );
1018                     /* XXX report as error in ld->ld_errno? */
1019                     return( 0 );
1020         }
1021
1022         /* find original request */
1023         for ( origreq = lr; origreq->lr_parent != NULL;
1024              origreq = origreq->lr_parent ) {
1025                 /* empty */;
1026         }
1027
1028         unfollowed = NULL;
1029         rc = count = 0;
1030
1031         /* parse out & follow referrals */
1032         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1033                 p = strchr( ref, '\n' );
1034                 if ( p != NULL ) {
1035                         *p++ = '\0';
1036                 }
1037
1038                 rc = ldap_url_parse_ext( ref, &srv );
1039
1040                 if ( rc != LDAP_URL_SUCCESS ) {
1041                         Debug( LDAP_DEBUG_TRACE,
1042                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1043                         rc = ldap_append_referral( ld, &unfollowed, ref );
1044                         *hadrefp = 1;
1045                         continue;
1046                 }
1047
1048                 if ( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1049                         LDAP_FREE( srv->lud_dn );
1050                         srv->lud_dn = NULL;
1051                 }
1052
1053                 Debug( LDAP_DEBUG_TRACE,
1054                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1055
1056                 *hadrefp = 1;
1057
1058                 LDAP_NEXT_MSGID( ld, id );
1059                 ber = re_encode_request( ld, origreq->lr_ber,
1060                     id, sref, srv, &rinfo.ri_request );
1061
1062                 if ( ber == NULL ) {
1063                         return -1 ;
1064                 }
1065
1066                 /* copy the complete referral for rebind process */
1067                 rinfo.ri_url = LDAP_STRDUP( ref );
1068
1069                 rinfo.ri_msgid = origreq->lr_origid;
1070
1071 #ifdef LDAP_R_COMPILE
1072                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1073 #endif
1074                 rc = ldap_send_server_request( ld, ber, id,
1075                         lr, srv, NULL, &rinfo );
1076 #ifdef LDAP_R_COMPILE
1077                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1078 #endif
1079
1080                 LDAP_FREE( rinfo.ri_url );
1081
1082                 if( rc >= 0 ) {
1083                         ++count;
1084                 } else {
1085                         Debug( LDAP_DEBUG_ANY,
1086                                 "Unable to chase referral \"%s\" (%d: %s)\n",
1087                                 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1088                         rc = ldap_append_referral( ld, &unfollowed, ref );
1089                 }
1090
1091                 ldap_free_urllist(srv);
1092         }
1093
1094         LDAP_FREE( *errstrp );
1095         *errstrp = unfollowed;
1096
1097         return(( rc == 0 ) ? count : rc );
1098 }
1099
1100
1101 int
1102 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1103 {
1104         int     first;
1105
1106         if ( *referralsp == NULL ) {
1107                 first = 1;
1108                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1109                     + 1 );
1110         } else {
1111                 first = 0;
1112                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1113                     strlen( *referralsp ) + strlen( s ) + 2 );
1114         }
1115
1116         if ( *referralsp == NULL ) {
1117                 ld->ld_errno = LDAP_NO_MEMORY;
1118                 return( -1 );
1119         }
1120
1121         if ( first ) {
1122                 strcpy( *referralsp, LDAP_REF_STR );
1123         } else {
1124                 strcat( *referralsp, "\n" );
1125         }
1126         strcat( *referralsp, s );
1127
1128         return( 0 );
1129 }
1130
1131
1132
1133 static BerElement *
1134 re_encode_request( LDAP *ld,
1135         BerElement *origber,
1136         ber_int_t msgid,
1137         int sref,
1138         LDAPURLDesc *srv,
1139         int *type )
1140 {
1141         /*
1142          * XXX this routine knows way too much about how the lber library works!
1143          */
1144         ber_int_t       along;
1145         ber_tag_t       tag;
1146         ber_tag_t       rtag;
1147         ber_int_t       ver;
1148         ber_int_t       scope;
1149         int             rc;
1150         BerElement      tmpber, *ber;
1151         char            *orig_dn;
1152         char            *dn;
1153
1154         Debug( LDAP_DEBUG_TRACE,
1155             "re_encode_request: new msgid %ld, new dn <%s>\n",
1156             (long) msgid,
1157                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1158
1159         tmpber = *origber;
1160
1161         /*
1162          * all LDAP requests are sequences that start with a message id.
1163          * For all except delete, this is followed by a sequence that is
1164          * tagged with the operation code.  For delete, the provided DN
1165          * is not wrapped by a sequence.
1166          */
1167         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1168
1169         if ( rtag == LBER_ERROR ) {
1170                 ld->ld_errno = LDAP_DECODING_ERROR;
1171                 return( NULL );
1172         }
1173
1174         assert( tag != 0);
1175         if ( tag == LDAP_REQ_BIND ) {
1176                 /* bind requests have a version number before the DN & other stuff */
1177                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1178
1179         } else if ( tag == LDAP_REQ_DELETE ) {
1180                 /* delete requests don't have a DN wrapping sequence */
1181                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1182
1183         } else if ( tag == LDAP_REQ_SEARCH ) {
1184                 /* search requests need to be re-scope-ed */
1185                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1186
1187                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1188                         /* use the scope provided in reference */
1189                         scope = srv->lud_scope;
1190
1191                 } else if ( sref ) {
1192                         /* use scope implied by previous operation
1193                          *   base -> base
1194                          *   one -> base
1195                          *   subtree -> subtree
1196                          *   subordinate -> subtree
1197                          */
1198                         switch( scope ) {
1199                         default:
1200                         case LDAP_SCOPE_BASE:
1201                         case LDAP_SCOPE_ONELEVEL:
1202                                 scope = LDAP_SCOPE_BASE;
1203                                 break;
1204                         case LDAP_SCOPE_SUBTREE:
1205 #ifdef LDAP_SCOPE_SUBORDINATE
1206                         case LDAP_SCOPE_SUBORDINATE:
1207 #endif
1208                                 scope = LDAP_SCOPE_SUBTREE;
1209                                 break;
1210                         }
1211                 }
1212
1213         } else {
1214                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1215         }
1216
1217         if( rtag == LBER_ERROR ) {
1218                 ld->ld_errno = LDAP_DECODING_ERROR;
1219                 return NULL;
1220         }
1221
1222         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1223                 return NULL;
1224         }
1225
1226         if ( srv->lud_dn == NULL ) {
1227                 dn = orig_dn;
1228         } else {
1229                 dn = srv->lud_dn;
1230         }
1231
1232         if ( tag == LDAP_REQ_BIND ) {
1233                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1234         } else if ( tag == LDAP_REQ_DELETE ) {
1235                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1236         } else if ( tag == LDAP_REQ_SEARCH ) {
1237                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1238         } else {
1239                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1240         }
1241
1242         LDAP_FREE( orig_dn );
1243
1244         if ( rc == -1 ) {
1245                 ld->ld_errno = LDAP_ENCODING_ERROR;
1246                 ber_free( ber, 1 );
1247                 return NULL;
1248         }
1249
1250         if ( tag != LDAP_REQ_DELETE && (
1251                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1252                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1253             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1254         {
1255                 ld->ld_errno = LDAP_ENCODING_ERROR;
1256                 ber_free( ber, 1 );
1257                 return NULL;
1258         }
1259
1260 #ifdef LDAP_DEBUG
1261         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1262                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1263                     0, 0, 0 );
1264                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1265         }
1266 #endif /* LDAP_DEBUG */
1267
1268         *type = tag;    /* return request type */
1269         return ber;
1270 }
1271
1272
1273 LDAPRequest *
1274 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1275 {
1276         LDAPRequest     *lr;
1277
1278 #ifdef LDAP_R_COMPILE
1279         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1280 #endif
1281         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1282                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1283                         continue;       /* Skip completed requests */
1284                 }
1285                 if ( msgid == lr->lr_msgid ) {
1286                         break;
1287                 }
1288         }
1289 #ifdef LDAP_R_COMPILE
1290         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1291 #endif
1292
1293         return( lr );
1294 }
1295
1296