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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /*  Portions
   7  *  Copyright (c) 1995 Regents of the University of Michigan.
   8  *  All rights reserved.
   9  */
  10 /*---
  11  * This notice applies to changes, created by or for Novell, Inc.,
  12  * to preexisting works for which notices appear elsewhere in this file.
  13  *
  14  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  15  *
  16  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  17  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  18  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  19  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  20  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  21  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  22  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  23  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  24  *---
  25  * Modification to OpenLDAP source by Novell, Inc.
  26  * April 2000 sfs  Added code to chase V3 referrals
  27  *  request.c - sending of ldap requests; handling of referrals
  28  */
  29 /* Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
  30  * can be found in the file "build/LICENSE-2.0.1" in this distribution
  31  * of OpenLDAP Software.
  32  */
  33
  34 #include "portable.h"
  35
  36 #include <stdio.h>
  37
  38 #include <ac/stdlib.h>
  39
  40 #include <ac/errno.h>
  41 #include <ac/socket.h>
  42 #include <ac/string.h>
  43 #include <ac/time.h>
  44 #include <ac/unistd.h>
  45
  46 #include "ldap-int.h"
  47 #include "lber.h"
  48
  49 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
  50 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
  51
  52 static BerElement *
  53 re_encode_request( LDAP *ld,
  54         BerElement *origber,
  55         ber_int_t msgid,
  56         int sref,
  57         LDAPURLDesc *srv,
  58         int *type );
  59
  60 BerElement *
  61 ldap_alloc_ber_with_options( LDAP *ld )
  62 {
  63         BerElement      *ber;
  64
  65     if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
  66                 ld->ld_errno = LDAP_NO_MEMORY;
  67         }
  68
  69         return( ber );
  70 }
  71
  72
  73 void
  74 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  75 {
  76         ber->ber_options = ld->ld_lberoptions;
  77 }
  78
  79
  80 ber_int_t
  81 ldap_send_initial_request(
  82         LDAP *ld,
  83         ber_tag_t msgtype,
  84         const char *dn,
  85         BerElement *ber,
  86         ber_int_t msgid)
  87 {
  88         LDAPURLDesc     *servers;
  89         int rc;
  90
  91 #ifdef NEW_LOGGING
  92         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_initial_request\n", 0, 0, 0 );
  93 #else
  94         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
  95 #endif
  96
  97         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
  98                 /* not connected yet */
  99                 int rc = ldap_open_defconn( ld );
 100
 101                 if( rc < 0 ) {
 102                         ber_free( ber, 1 );
 103                         return( -1 );
 104                 }
 105
 106 #ifdef NEW_LOGGING
 107                 LDAP_LOG ( OPERATION, DETAIL1,
 108                         "ldap_send_initial_request: ldap_open_defconn: successful\n" ,
 109                         0, 0, 0);
 110 #else
 111                 Debug( LDAP_DEBUG_TRACE,
 112                         "ldap_open_defconn: successful\n",
 113                         0, 0, 0 );
 114 #endif
 115         }
 116
 117         {
 118                 /*
 119                  * use of DNS is turned off or this is an X.500 DN...
 120                  * use our default connection
 121                  */
 122                 servers = NULL;
 123         }
 124
 125 #ifdef LDAP_CONNECTIONLESS
 126         if (LDAP_IS_UDP(ld)) {
 127                 if (msgtype == LDAP_REQ_BIND) {
 128                         if (ld->ld_options.ldo_cldapdn)
 129                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 130                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 131                         return 0;
 132                 }
 133                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 134                         return LDAP_PARAM_ERROR;
 135         }
 136 #endif
 137 #ifdef LDAP_R_COMPILE
 138         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 139 #endif
 140         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 141                                                                         servers, NULL, NULL );
 142 #ifdef LDAP_R_COMPILE
 143         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 144 #endif
 145         if (servers)
 146                 ldap_free_urllist(servers);
 147         return(rc);
 148 }
 149
 150
 151 int
 152 ldap_int_flush_request(
 153         LDAP *ld,
 154         LDAPRequest *lr
 155 )
 156 {
 157         LDAPConn *lc = lr->lr_conn;
 158
 159         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 160                 if ( errno == EAGAIN ) {
 161                         /* need to continue write later */
 162                         lr->lr_status = LDAP_REQST_WRITING;
 163                         ldap_mark_select_write( ld, lc->lconn_sb );
 164                         ld->ld_errno = LDAP_BUSY;
 165                         return -2;
 166                 } else {
 167                         ld->ld_errno = LDAP_SERVER_DOWN;
 168                         ldap_free_request( ld, lr );
 169                         ldap_free_connection( ld, lc, 0, 0 );
 170                         return( -1 );
 171                 }
 172         } else {
 173                 if ( lr->lr_parent == NULL ) {
 174                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 175                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 176                 }
 177                 lr->lr_status = LDAP_REQST_INPROGRESS;
 178
 179                 /* sent -- waiting for a response */
 180                 ldap_mark_select_read( ld, lc->lconn_sb );
 181         }
 182         return 0;
 183 }
 184
 185 int
 186 ldap_send_server_request(
 187         LDAP *ld,
 188         BerElement *ber,
 189         ber_int_t msgid,
 190         LDAPRequest *parentreq,
 191         LDAPURLDesc *srvlist,
 192         LDAPConn *lc,
 193         LDAPreqinfo *bind )
 194 {
 195         LDAPRequest     *lr;
 196         int incparent, rc;
 197
 198 #ifdef NEW_LOGGING
 199         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_server_request\n", 0, 0, 0 );
 200 #else
 201         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 202 #endif
 203
 204         incparent = 0;
 205         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 206
 207         if ( lc == NULL ) {
 208                 if ( srvlist == NULL ) {
 209                         lc = ld->ld_defconn;
 210                 } else {
 211                         if (( lc = find_connection( ld, srvlist, 1 )) ==
 212                             NULL ) {
 213                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 214                                         /* Remember the bind in the parent */
 215                                         incparent = 1;
 216                                         ++parentreq->lr_outrefcnt;
 217                                 }
 218                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 219                         }
 220                 }
 221         }
 222
 223         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 224                 ber_free( ber, 1 );
 225                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 226                         ld->ld_errno = LDAP_SERVER_DOWN;
 227                 }
 228                 if ( incparent ) {
 229                         /* Forget about the bind */
 230                         --parentreq->lr_outrefcnt;
 231                 }
 232                 return( -1 );
 233         }
 234
 235         use_connection( ld, lc );
 236
 237         /* If we still have an incomplete write, try to finish it before
 238          * dealing with the new request. If we don't finish here, return
 239          * LDAP_BUSY and let the caller retry later. We only allow a single
 240          * request to be in WRITING state.
 241          */
 242         rc = 0;
 243         if ( ld->ld_requests &&
 244                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 245                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 ) {
 246                 rc = -1;
 247         }
 248         if ( rc ) return rc;
 249
 250         if (( lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ))) ==
 251             NULL ) {
 252                 ld->ld_errno = LDAP_NO_MEMORY;
 253                 ldap_free_connection( ld, lc, 0, 0 );
 254                 ber_free( ber, 1 );
 255                 if ( incparent ) {
 256                         /* Forget about the bind */
 257                         --parentreq->lr_outrefcnt;
 258                 }
 259                 return( -1 );
 260         }
 261         lr->lr_msgid = msgid;
 262         lr->lr_status = LDAP_REQST_INPROGRESS;
 263         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 264         lr->lr_ber = ber;
 265         lr->lr_conn = lc;
 266         if ( parentreq != NULL ) {      /* sub-request */
 267                 if ( !incparent ) {
 268                         /* Increment if we didn't do it before the bind */
 269                         ++parentreq->lr_outrefcnt;
 270                 }
 271                 lr->lr_origid = parentreq->lr_origid;
 272                 lr->lr_parentcnt = parentreq->lr_parentcnt + 1;
 273                 lr->lr_parent = parentreq;
 274                 lr->lr_refnext = parentreq->lr_child;
 275                 parentreq->lr_child = lr;
 276         } else {                        /* original request */
 277                 lr->lr_origid = lr->lr_msgid;
 278         }
 279
 280         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 281                 lr->lr_next->lr_prev = lr;
 282         }
 283         ld->ld_requests = lr;
 284         lr->lr_prev = NULL;
 285
 286         ld->ld_errno = LDAP_SUCCESS;
 287         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 288                 msgid = -1;
 289         }
 290
 291         return( msgid );
 292 }
 293
 294 LDAPConn *
 295 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 296         int connect, LDAPreqinfo *bind )
 297 {
 298         LDAPConn        *lc;
 299         LDAPURLDesc     *srv;
 300         Sockbuf         *sb = NULL;
 301
 302 #ifdef NEW_LOGGING
 303         LDAP_LOG ( OPERATION, ENTRY, "ldap_new_connection\n", 0, 0, 0 );
 304 #else
 305         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection\n", 0, 0, 0 );
 306 #endif
 307         /*
 308          * make a new LDAP server connection
 309          * XXX open connection synchronously for now
 310          */
 311         if (( lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ))) == NULL ||
 312             ( !use_ldsb && ( (sb = ber_sockbuf_alloc()) == NULL ))) {
 313                 if ( lc != NULL ) {
 314                         LDAP_FREE( (char *)lc );
 315                 }
 316                 ld->ld_errno = LDAP_NO_MEMORY;
 317                 return( NULL );
 318         }
 319
 320         lc->lconn_sb = ( use_ldsb ) ? ld->ld_sb : sb;
 321
 322         if ( connect ) {
 323                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 324                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 ) {
 325                                 break;
 326                         }
 327                 }
 328
 329                 if ( srv == NULL ) {
 330                         if ( !use_ldsb ) {
 331                                 ber_sockbuf_free( lc->lconn_sb );
 332                         }
 333                     LDAP_FREE( (char *)lc );
 334                     ld->ld_errno = LDAP_SERVER_DOWN;
 335                     return( NULL );
 336                 }
 337
 338                 lc->lconn_server = ldap_url_dup(srv);
 339         }
 340
 341         lc->lconn_status = LDAP_CONNST_CONNECTED;
 342         lc->lconn_next = ld->ld_conns;
 343         ld->ld_conns = lc;
 344
 345         /*
 346          * XXX for now, we always do a synchronous bind.  This will have
 347          * to change in the long run...
 348          */
 349         if ( bind != NULL) {
 350                 int             err = 0;
 351                 LDAPConn        *savedefconn;
 352
 353                 /* Set flag to prevent additional referrals 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                         if( ( srvfunc = ldap_url_dup( srvlist)) == NULL) {
 361                                 ld->ld_errno = LDAP_NO_MEMORY;
 362                                 err = -1;
 363                         } else {
 364                                 savedefconn = ld->ld_defconn;
 365                                 ++lc->lconn_refcnt;     /* avoid premature free */
 366                                 ld->ld_defconn = lc;
 367
 368 #ifdef NEW_LOGGING
 369                                 LDAP_LOG ( OPERATION, DETAIL1,
 370                                         "ldap_new_connection: Call application rebind_proc\n",
 371                                         0, 0, 0 );
 372 #else
 373                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 374 #endif
 375 #ifdef LDAP_R_COMPILE
 376                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 377                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 378 #endif
 379                                 err = (*ld->ld_rebind_proc)( ld,
 380                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 381                                         ld->ld_rebind_params );
 382 #ifdef LDAP_R_COMPILE
 383                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 384                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 385 #endif
 386
 387                                 ld->ld_defconn = savedefconn;
 388                                 --lc->lconn_refcnt;
 389
 390                                 if( err != 0) {
 391                                 err = -1;
 392                                         ldap_free_connection( ld, lc, 1, 0 );
 393                                         lc = NULL;
 394                         }
 395                                 ldap_free_urldesc( srvfunc);
 396                 }
 397                 } else {
 398                         savedefconn = ld->ld_defconn;
 399                         ++lc->lconn_refcnt;     /* avoid premature free */
 400                         ld->ld_defconn = lc;
 401
 402 #ifdef NEW_LOGGING
 403                         LDAP_LOG ( OPERATION, DETAIL1,
 404                                 "ldap_new_connection: anonymous rebind via ldap_bind_s\n",
 405                                 0, 0, 0 );
 406 #else
 407                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 408 #endif
 409 #ifdef LDAP_R_COMPILE
 410                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 411                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 412 #endif
 413                         if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
 414                                 err = -1;
 415                         }
 416 #ifdef LDAP_R_COMPILE
 417                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 418                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 419 #endif
 420                         ld->ld_defconn = savedefconn;
 421                         --lc->lconn_refcnt;
 422
 423                 if ( err != 0 ) {
 424                         ldap_free_connection( ld, lc, 1, 0 );
 425                         lc = NULL;
 426                 }
 427         }
 428                 if( lc != NULL)
 429                         lc->lconn_rebind_inprogress = 0;
 430         }
 431
 432         return( lc );
 433 }
 434
 435
 436 static LDAPConn *
 437 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 438 /*
 439  * return an existing connection (if any) to the server srv
 440  * if "any" is non-zero, check for any server in the "srv" chain
 441  */
 442 {
 443         LDAPConn        *lc;
 444         LDAPURLDesc     *ls;
 445
 446         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 447                 for ( ls = srv; ls != NULL; ls = ls->lud_next ) {
 448                         if ( lc->lconn_server->lud_host != NULL &&
 449                                 *lc->lconn_server->lud_host != '\0' &&
 450                             ls->lud_host != NULL && *ls->lud_host != '\0' &&
 451                                 strcasecmp( ls->lud_host, lc->lconn_server->lud_host ) == 0
 452                             && ls->lud_port == lc->lconn_server->lud_port ) {
 453                                 return lc;
 454                         }
 455                         if ( !any ) {
 456                                 break;
 457                         }
 458                 }
 459         }
 460
 461         return NULL;
 462 }
 463
 464
 465
 466 static void
 467 use_connection( LDAP *ld, LDAPConn *lc )
 468 {
 469         ++lc->lconn_refcnt;
 470         lc->lconn_lastused = time( NULL );
 471 }
 472
 473
 474 void
 475 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 476 {
 477         LDAPConn        *tmplc, *prevlc;
 478
 479 #ifdef NEW_LOGGING
 480         LDAP_LOG ( OPERATION, ENTRY, "ldap_free_connection\n", 0, 0, 0 );
 481 #else
 482         Debug( LDAP_DEBUG_TRACE, "ldap_free_connection\n", 0, 0, 0 );
 483 #endif
 484
 485         if ( force || --lc->lconn_refcnt <= 0 ) {
 486                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 487                         ldap_mark_select_clear( ld, lc->lconn_sb );
 488                         if ( unbind ) {
 489                                 ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
 490                         }
 491                 }
 492
 493                 if( lc->lconn_ber != NULL ) {
 494                         ber_free( lc->lconn_ber, 1 );
 495                 }
 496
 497                 ldap_int_sasl_close( ld, lc );
 498
 499                 prevlc = NULL;
 500                 for ( tmplc = ld->ld_conns; tmplc != NULL;
 501                     tmplc = tmplc->lconn_next ) {
 502                         if ( tmplc == lc ) {
 503                                 if ( prevlc == NULL ) {
 504                                     ld->ld_conns = tmplc->lconn_next;
 505                                 } else {
 506                                     prevlc->lconn_next = tmplc->lconn_next;
 507                                 }
 508                                 break;
 509                         }
 510                         prevlc = tmplc;
 511                 }
 512                 ldap_free_urllist( lc->lconn_server );
 513 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 514                 if ( lc->lconn_krbinstance != NULL ) {
 515                         LDAP_FREE( lc->lconn_krbinstance );
 516                 }
 517 #endif
 518                 if ( lc->lconn_sb != ld->ld_sb ) {
 519                         ber_sockbuf_free( lc->lconn_sb );
 520                 }
 521                 if( lc->lconn_rebind_queue != NULL) {
 522                         int i;
 523                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++) {
 524                                 LDAP_VFREE(lc->lconn_rebind_queue[i]);
 525                         }
 526                         LDAP_FREE( lc->lconn_rebind_queue);
 527                 }
 528                 LDAP_FREE( lc );
 529 #ifdef NEW_LOGGING
 530                 LDAP_LOG ( OPERATION, RESULTS,
 531                         "ldap_free_connection: actually freed\n", 0, 0, 0 );
 532 #else
 533                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
 534                     0, 0, 0 );
 535 #endif
 536         } else {
 537                 lc->lconn_lastused = time( NULL );
 538 #ifdef NEW_LOGGING
 539                 LDAP_LOG ( OPERATION, RESULTS, "ldap_free_connection: refcnt %d\n",
 540                         lc->lconn_refcnt, 0, 0 );
 541 #else
 542                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 543                     lc->lconn_refcnt, 0, 0 );
 544 #endif
 545         }
 546 }
 547
 548
 549 #ifdef LDAP_DEBUG
 550 void
 551 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 552 {
 553         LDAPConn        *lc;
 554         char            timebuf[32];
 555
 556         fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
 557         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 558                 if ( lc->lconn_server != NULL ) {
 559                         fprintf( stderr, "* host: %s  port: %d%s\n",
 560                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 561                             : lc->lconn_server->lud_host,
 562                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 563                             ld->ld_sb ) ? "  (default)" : "" );
 564                 }
 565                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 566                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 567                     "NeedSocket" : ( lc->lconn_status ==
 568                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 569                 fprintf( stderr, "  last used: %s",
 570                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 571                 if( lc->lconn_rebind_inprogress ) {
 572                         fprintf( stderr, "  rebind in progress\n");
 573                         if( lc->lconn_rebind_queue != NULL) {
 574                                 int i = 0;
 575                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 576                                         int j = 0;
 577                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 578                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 579                                                         i, j, lc->lconn_rebind_queue[i][j]);
 580                                         }
 581                                 }
 582                         } else {
 583                                 fprintf( stderr, "    queue is empty\n");
 584                         }
 585                 }
 586                 fprintf(stderr, "\n");
 587                 if ( !all ) {
 588                         break;
 589                 }
 590         }
 591 }
 592
 593
 594 void
 595 ldap_dump_requests_and_responses( LDAP *ld )
 596 {
 597         LDAPRequest     *lr;
 598         LDAPMessage     *lm, *l;
 599
 600 #ifdef LDAP_R_COMPILE
 601         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 602 #endif
 603         fprintf( stderr, "** Outstanding Requests:\n" );
 604         if (( lr = ld->ld_requests ) == NULL ) {
 605                 fprintf( stderr, "   Empty\n" );
 606         }
 607         for ( ; lr != NULL; lr = lr->lr_next ) {
 608             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 609                 lr->lr_msgid, lr->lr_origid,
 610                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 611                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 612                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 613                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 614                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
 615             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 616                     lr->lr_outrefcnt, lr->lr_parentcnt );
 617         }
 618 #ifdef LDAP_R_COMPILE
 619         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 620 #endif
 621         fprintf( stderr, "** Response Queue:\n" );
 622         if (( lm = ld->ld_responses ) == NULL ) {
 623                 fprintf( stderr, "   Empty\n" );
 624         }
 625         for ( ; lm != NULL; lm = lm->lm_next ) {
 626                 fprintf( stderr, " * msgid %d,  type %lu\n",
 627                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 628                 if (( l = lm->lm_chain ) != NULL ) {
 629                         fprintf( stderr, "   chained responses:\n" );
 630                         for ( ; l != NULL; l = l->lm_chain ) {
 631                                 fprintf( stderr,
 632                                     "  * msgid %d,  type %lu\n",
 633                                     l->lm_msgid,
 634                                     (unsigned long) l->lm_msgtype );
 635                         }
 636                 }
 637         }
 638 }
 639 #endif /* LDAP_DEBUG */
 640
 641 void
 642 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 643 {
 644         if ( lr->lr_prev == NULL ) {
 645                 ld->ld_requests = lr->lr_next;
 646         } else {
 647                 lr->lr_prev->lr_next = lr->lr_next;
 648         }
 649
 650         if ( lr->lr_next != NULL ) {
 651                 lr->lr_next->lr_prev = lr->lr_prev;
 652         }
 653
 654         if ( lr->lr_ber != NULL ) {
 655                 ber_free( lr->lr_ber, 1 );
 656         }
 657
 658         if ( lr->lr_res_error != NULL ) {
 659                 LDAP_FREE( lr->lr_res_error );
 660         }
 661
 662         if ( lr->lr_res_matched != NULL ) {
 663                 LDAP_FREE( lr->lr_res_matched );
 664         }
 665
 666         LDAP_FREE( lr );
 667 }
 668
 669 void
 670 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 671 {
 672         LDAPRequest     **ttmplr;
 673
 674 #ifdef NEW_LOGGING
 675         LDAP_LOG ( OPERATION, ARGS, "ldap_free_request (origid %d, msgid %d)\n",
 676                 lr->lr_origid, lr->lr_msgid, 0 );
 677 #else
 678         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 679                 lr->lr_origid, lr->lr_msgid, 0 );
 680 #endif
 681
 682         /* free all referrals (child requests) */
 683         while ( lr->lr_child )
 684                 ldap_free_request( ld, lr->lr_child );
 685
 686         if ( lr->lr_parent != NULL ) {
 687                 --lr->lr_parent->lr_outrefcnt;
 688                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 689                 if ( *ttmplr == lr )
 690                         *ttmplr = lr->lr_refnext;
 691         }
 692         ldap_free_request_int( ld, lr );
 693 }
 694
 695
 696 /*
 697  * Chase v3 referrals
 698  *
 699  * Parameters:
 700  *  (IN) ld = LDAP connection handle
 701  *  (IN) lr = LDAP Request structure
 702  *  (IN) refs = array of pointers to referral strings that we will chase
 703  *              The array will be free'd by this function when no longer needed
 704  *  (IN) sref != 0 if following search reference
 705  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 706  *  (OUT) hadrefp = 1 if sucessfully followed referral
 707  *
 708  * Return value - number of referrals followed
 709  */
 710 int
 711 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 712 {
 713         char            *unfollowed;
 714         int                      unfollowedcnt = 0;
 715         LDAPRequest     *origreq;
 716         LDAPURLDesc     *srv = NULL;
 717         BerElement      *ber;
 718         char            **refarray = NULL;
 719         LDAPConn        *lc;
 720         int                      rc, count, i, j, id;
 721         LDAPreqinfo  rinfo;
 722
 723         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 724         *hadrefp = 0;
 725
 726 #ifdef NEW_LOGGING
 727         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_v3referrals\n", 0, 0, 0 );
 728 #else
 729         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 730 #endif
 731
 732         unfollowed = NULL;
 733         rc = count = 0;
 734
 735         /* If no referrals in array, return */
 736         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 737                 rc = 0;
 738                 goto done;
 739         }
 740
 741         /* Check for hop limit exceeded */
 742         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 743 #ifdef NEW_LOGGING
 744                 LDAP_LOG ( OPERATION, DETAIL1,
 745                         "ldap_chase_v3referrals: more than %d referral hops (dropping)\n",
 746                         ld->ld_refhoplimit, 0, 0 );
 747 #else
 748                 Debug( LDAP_DEBUG_ANY,
 749                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 750 #endif
 751                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 752             rc = -1;
 753                 goto done;
 754         }
 755
 756         /* find original request */
 757         for ( origreq = lr;
 758                 origreq->lr_parent != NULL;
 759                 origreq = origreq->lr_parent )
 760         {
 761                 /* empty */ ;
 762         }
 763
 764         refarray = refs;
 765         refs = NULL;
 766         /* parse out & follow referrals */
 767         for( i=0; refarray[i] != NULL; i++) {
 768                 /* Parse the referral URL */
 769                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 770                         ld->ld_errno = rc;
 771                         rc = -1;
 772                         goto done;
 773                 }
 774
 775                 if( srv->lud_crit_exts ) {
 776                         /* we do not support any extensions */
 777                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 778                         rc = -1;
 779                         goto done;
 780                 }
 781
 782                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 783                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 784                         LDAP_FREE( srv->lud_dn );
 785                         srv->lud_dn = NULL;
 786                 }
 787
 788                 /* check connection for re-bind in progress */
 789                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 790                         if( lc->lconn_rebind_inprogress) {
 791                                 /* We are already chasing a referral or search reference and a
 792                                  * bind on that connection is in progress.  We must queue
 793                                  * referrals on that connection, so we don't get a request
 794                                  * going out before the bind operation completes. This happens
 795                                  * if two search references come in one behind the other
 796                                  * for the same server with different contexts.
 797                                  */
 798 #ifdef NEW_LOGGING
 799                                 LDAP_LOG ( OPERATION, DETAIL1,
 800                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 801                                         refarray[i], 0, 0 );
 802 #else
 803                                 Debug( LDAP_DEBUG_TRACE,
 804                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 805                                         refarray[i], 0, 0);
 806 #endif
 807                                 if( lc->lconn_rebind_queue == NULL ) {
 808                                         /* Create a referral list */
 809                                         lc->lconn_rebind_queue =
 810                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 811
 812                                         if( lc->lconn_rebind_queue == NULL) {
 813                                                 ld->ld_errno = LDAP_NO_MEMORY;
 814                                                 rc = -1;
 815                                                 goto done;
 816                                         }
 817
 818                                         lc->lconn_rebind_queue[0] = refarray;
 819                                         lc->lconn_rebind_queue[1] = NULL;
 820                                         refarray = NULL;
 821
 822                                 } else {
 823                                         /* Count how many referral arrays we already have */
 824                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 825                                                 /* empty */;
 826                                         }
 827
 828                                         /* Add the new referral to the list */
 829                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 830                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 831
 832                                         if( lc->lconn_rebind_queue == NULL ) {
 833                                                 ld->ld_errno = LDAP_NO_MEMORY;
 834                                                 rc = -1;
 835                                                 goto done;
 836                                         }
 837                                         lc->lconn_rebind_queue[j] = refarray;
 838                                         lc->lconn_rebind_queue[j+1] = NULL;
 839                                         refarray = NULL;
 840                                 }
 841
 842                                 /* We have queued the referral/reference, now just return */
 843                                 rc = 0;
 844                                 *hadrefp = 1;
 845                                 count = 1; /* Pretend we already followed referral */
 846                                 goto done;
 847                         }
 848                 }
 849                 /* Re-encode the request with the new starting point of the search.
 850                  * Note: In the future we also need to replace the filter if one
 851                  * was provided with the search reference
 852                  */
 853
 854                 /* For references we don't want old dn if new dn empty */
 855                 if ( sref && srv->lud_dn == NULL ) {
 856                         srv->lud_dn = LDAP_STRDUP( "" );
 857                 }
 858
 859                 LDAP_NEXT_MSGID( ld, id );
 860                 ber = re_encode_request( ld, origreq->lr_ber, id,
 861                         sref, srv, &rinfo.ri_request );
 862
 863                 if( ber == NULL ) {
 864                         ld->ld_errno = LDAP_ENCODING_ERROR;
 865                         rc = -1;
 866                         goto done;
 867                 }
 868
 869 #ifdef NEW_LOGGING
 870                 LDAP_LOG ( OPERATION, DETAIL1,
 871                         "ldap_chase_v3referrals: msgid %d, url \"%s\"\n",
 872                         lr->lr_msgid, refarray[i], 0 );
 873 #else
 874                 Debug( LDAP_DEBUG_TRACE,
 875                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 876                         lr->lr_msgid, refarray[i], 0);
 877 #endif
 878
 879                 /* Send the new request to the server - may require a bind */
 880                 rinfo.ri_msgid = origreq->lr_origid;
 881                 rinfo.ri_url = refarray[i];
 882 #ifdef LDAP_R_COMPILE
 883                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 884 #endif
 885                 rc = ldap_send_server_request( ld, ber, id,
 886                         origreq, srv, NULL, &rinfo );
 887 #ifdef LDAP_R_COMPILE
 888                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 889 #endif
 890                 if ( rc < 0 ) {
 891                         /* Failure, try next referral in the list */
 892 #ifdef NEW_LOGGING
 893                         LDAP_LOG ( OPERATION, ERR,
 894                         "ldap_chase_v3referrals: Unable to chase referral \"%s\" (%s)\n",
 895                         refarray[i], ldap_err2string( ld->ld_errno ), 0 );
 896 #else
 897                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
 898                                 refarray[i], ldap_err2string( ld->ld_errno ), 0);
 899 #endif
 900                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
 901                         ldap_free_urllist(srv);
 902                         srv = NULL;
 903                 } else {
 904                         /* Success, no need to try this referral list further */
 905                         rc = 0;
 906                         ++count;
 907                         *hadrefp = 1;
 908
 909                         /* check if there is a queue of referrals that came in during bind */
 910                         if( lc == NULL) {
 911                                 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
 912                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 913                                         rc = -1;
 914                                         goto done;
 915                                 }
 916                         }
 917
 918                         if( lc->lconn_rebind_queue != NULL) {
 919                                 /* Release resources of previous list */
 920                                 LDAP_VFREE(refarray);
 921                                 refarray = NULL;
 922                                 ldap_free_urllist(srv);
 923                                 srv = NULL;
 924
 925                                 /* Pull entries off end of queue so list always null terminated */
 926                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 927                                         ;
 928                                 }
 929                                 refarray = lc->lconn_rebind_queue[j-1];
 930                                 lc->lconn_rebind_queue[j-1] = NULL;
 931                                 /* we pulled off last entry from queue, free queue */
 932                                 if ( j == 1 ) {
 933                                         LDAP_FREE( lc->lconn_rebind_queue);
 934                                         lc->lconn_rebind_queue = NULL;
 935                                 }
 936                                 /* restart the loop the with new referral list */
 937                                 i = -1;
 938                                 continue;
 939                         }
 940                         break; /* referral followed, break out of for loop */
 941                 }
 942         } /* end for loop */
 943 done:
 944         LDAP_VFREE(refarray);
 945         ldap_free_urllist(srv);
 946         LDAP_FREE( *errstrp );
 947
 948         if( rc == 0) {
 949                 *errstrp = NULL;
 950                 LDAP_FREE( unfollowed );
 951                 return count;
 952         } else {
 953                 ld->ld_errno = LDAP_REFERRAL;
 954                 *errstrp = unfollowed;
 955                 return rc;
 956         }
 957 }
 958
 959 /*
 960  * XXX merging of errors in this routine needs to be improved
 961  */
 962 int
 963 ldap_chase_referrals( LDAP *ld,
 964         LDAPRequest *lr,
 965         char **errstrp,
 966         int sref,
 967         int *hadrefp )
 968 {
 969         int             rc, count, id;
 970         unsigned        len;
 971         char            *p, *ref, *unfollowed;
 972         LDAPRequest     *origreq;
 973         LDAPURLDesc     *srv;
 974         BerElement      *ber;
 975         LDAPreqinfo  rinfo;
 976
 977 #ifdef NEW_LOGGING
 978         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_referrals\n", 0, 0, 0 );
 979 #else
 980         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 981 #endif
 982
 983         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 984         *hadrefp = 0;
 985
 986         if ( *errstrp == NULL ) {
 987                 return( 0 );
 988         }
 989
 990         len = strlen( *errstrp );
 991         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
 992                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
 993                         *p = '\0';
 994                         p += LDAP_REF_STR_LEN;
 995                         break;
 996                 }
 997         }
 998
 999         if ( len < LDAP_REF_STR_LEN ) {
1000                 return( 0 );
1001         }
1002
1003         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1004 #ifdef NEW_LOGGING
1005                 LDAP_LOG ( OPERATION, ENTRY,
1006                         "ldap_chase_referrals: more than %d referral hops (dropping)\n",
1007                         ld->ld_refhoplimit, 0, 0 );
1008 #else
1009                 Debug( LDAP_DEBUG_ANY,
1010                     "more than %d referral hops (dropping)\n",
1011                     ld->ld_refhoplimit, 0, 0 );
1012 #endif
1013                     /* XXX report as error in ld->ld_errno? */
1014                     return( 0 );
1015         }
1016
1017         /* find original request */
1018         for ( origreq = lr; origreq->lr_parent != NULL;
1019              origreq = origreq->lr_parent ) {
1020                 /* empty */;
1021         }
1022
1023         unfollowed = NULL;
1024         rc = count = 0;
1025
1026         /* parse out & follow referrals */
1027         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1028                 if (( p = strchr( ref, '\n' )) != NULL ) {
1029                         *p++ = '\0';
1030                 } else {
1031                         p = NULL;
1032                 }
1033
1034                 rc = ldap_url_parse_ext( ref, &srv );
1035
1036                 if ( rc != LDAP_URL_SUCCESS ) {
1037 #ifdef NEW_LOGGING
1038                         LDAP_LOG ( OPERATION, DETAIL1,
1039                                 "ldap_chase_referrals: ignoring unknown referral <%s>\n",
1040                                 ref, 0, 0 );
1041 #else
1042                         Debug( LDAP_DEBUG_TRACE,
1043                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1044 #endif
1045                         rc = ldap_append_referral( ld, &unfollowed, ref );
1046                         *hadrefp = 1;
1047                         continue;
1048                 }
1049
1050                 if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1051                         LDAP_FREE( srv->lud_dn );
1052                         srv->lud_dn = NULL;
1053                 }
1054
1055 #ifdef NEW_LOGGING
1056                 LDAP_LOG ( OPERATION, DETAIL1,
1057                         "ldap_chase_referrals: chasing LDAP referral <%s>\n", ref, 0, 0 );
1058 #else
1059                 Debug( LDAP_DEBUG_TRACE,
1060                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1061 #endif
1062
1063                 *hadrefp = 1;
1064
1065                 LDAP_NEXT_MSGID( ld, id );
1066                 ber = re_encode_request( ld, origreq->lr_ber,
1067                     id, sref, srv, &rinfo.ri_request );
1068
1069                 if( ber == NULL ) {
1070                         return -1 ;
1071                 }
1072
1073                 /* copy the complete referral for rebind process */
1074                 rinfo.ri_url = LDAP_STRDUP( ref );
1075
1076                 rinfo.ri_msgid = origreq->lr_origid;
1077
1078 #ifdef LDAP_R_COMPILE
1079         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1080 #endif
1081                 rc = ldap_send_server_request( ld, ber, id,
1082                     lr, srv, NULL, &rinfo );
1083 #ifdef LDAP_R_COMPILE
1084         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1085 #endif
1086
1087                 LDAP_FREE( rinfo.ri_url );
1088
1089                 if( rc >= 0 ) {
1090                         ++count;
1091                 } else {
1092 #ifdef NEW_LOGGING
1093                         LDAP_LOG ( OPERATION, ERR,
1094                                 "ldap_chase_referrals: Unable to chase referral <%s>\n",
1095                                 ldap_err2string( ld->ld_errno), 0, 0 );
1096 #else
1097                         Debug( LDAP_DEBUG_ANY,
1098                             "Unable to chase referral (%s)\n",
1099                             ldap_err2string( ld->ld_errno ), 0, 0 );
1100 #endif
1101                         rc = ldap_append_referral( ld, &unfollowed, ref );
1102                 }
1103
1104                 ldap_free_urllist(srv);
1105         }
1106
1107         LDAP_FREE( *errstrp );
1108         *errstrp = unfollowed;
1109
1110         return(( rc == 0 ) ? count : rc );
1111 }
1112
1113
1114 int
1115 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1116 {
1117         int     first;
1118
1119         if ( *referralsp == NULL ) {
1120                 first = 1;
1121                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1122                     + 1 );
1123         } else {
1124                 first = 0;
1125                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1126                     strlen( *referralsp ) + strlen( s ) + 2 );
1127         }
1128
1129         if ( *referralsp == NULL ) {
1130                 ld->ld_errno = LDAP_NO_MEMORY;
1131                 return( -1 );
1132         }
1133
1134         if ( first ) {
1135                 strcpy( *referralsp, LDAP_REF_STR );
1136         } else {
1137                 strcat( *referralsp, "\n" );
1138         }
1139         strcat( *referralsp, s );
1140
1141         return( 0 );
1142 }
1143
1144
1145
1146 static BerElement *
1147 re_encode_request( LDAP *ld,
1148         BerElement *origber,
1149         ber_int_t msgid,
1150         int sref,
1151         LDAPURLDesc *srv,
1152         int *type )
1153 {
1154         /*
1155          * XXX this routine knows way too much about how the lber library works!
1156          */
1157         ber_int_t       along;
1158         ber_tag_t       tag;
1159         ber_tag_t       rtag;
1160         ber_int_t       ver;
1161         ber_int_t       scope;
1162         int             rc;
1163         BerElement      tmpber, *ber;
1164         char            *orig_dn;
1165         char            *dn;
1166
1167 #ifdef NEW_LOGGING
1168         LDAP_LOG ( OPERATION, ARGS,
1169                 "re_encode_request: new msgid %ld, new dn <%s>\n",
1170                 (long) msgid,
1171                 ( srv == NULL || srv->lud_dn == NULL ) ? "NONE" : srv->lud_dn, 0 );
1172 #else
1173         Debug( LDAP_DEBUG_TRACE,
1174             "re_encode_request: new msgid %ld, new dn <%s>\n",
1175             (long) msgid,
1176                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1177 #endif
1178
1179         tmpber = *origber;
1180
1181         /*
1182          * all LDAP requests are sequences that start with a message id.
1183          * For all except delete, this is followed by a sequence that is
1184          * tagged with the operation code.  For delete, the provided DN
1185          * is not wrapped by a sequence.
1186          */
1187         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1188
1189         if ( rtag == LBER_ERROR ) {
1190                 ld->ld_errno = LDAP_DECODING_ERROR;
1191                 return( NULL );
1192         }
1193
1194         assert( tag != 0);
1195         if ( tag == LDAP_REQ_BIND ) {
1196                 /* bind requests have a version number before the DN & other stuff */
1197                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1198
1199         } else if ( tag == LDAP_REQ_DELETE ) {
1200                 /* delete requests don't have a DN wrapping sequence */
1201                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1202
1203         } else if ( tag == LDAP_REQ_SEARCH ) {
1204                 /* search requests need to be re-scope-ed */
1205                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1206
1207                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1208                         /* use the scope provided in reference */
1209                         scope = srv->lud_scope;
1210
1211                 } else if ( sref && scope != LDAP_SCOPE_SUBTREE ) {
1212                         /* use scope implied by previous operation */
1213                         /*   base -> base */
1214                         /*   one -> base */
1215                         /*   subtree -> subtree */
1216                         scope = LDAP_SCOPE_BASE;
1217                 }
1218
1219         } else {
1220                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1221         }
1222
1223         if( rtag == LBER_ERROR ) {
1224                 ld->ld_errno = LDAP_DECODING_ERROR;
1225                 return NULL;
1226         }
1227
1228         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1229                 return NULL;
1230         }
1231
1232         if ( srv->lud_dn == NULL ) {
1233                 dn = orig_dn;
1234         } else {
1235                 dn = srv->lud_dn;
1236         }
1237
1238         if ( tag == LDAP_REQ_BIND ) {
1239                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1240         } else if ( tag == LDAP_REQ_DELETE ) {
1241                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1242         } else if ( tag == LDAP_REQ_SEARCH ) {
1243                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1244         } else {
1245                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1246         }
1247
1248         LDAP_FREE( orig_dn );
1249
1250         if ( rc == -1 ) {
1251                 ld->ld_errno = LDAP_ENCODING_ERROR;
1252                 ber_free( ber, 1 );
1253                 return NULL;
1254         }
1255
1256         if ( tag != LDAP_REQ_DELETE && (
1257                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1258                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1259             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1260         {
1261                 ld->ld_errno = LDAP_ENCODING_ERROR;
1262                 ber_free( ber, 1 );
1263                 return NULL;
1264         }
1265
1266 #ifdef LDAP_DEBUG
1267         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1268 #ifdef NEW_LOGGING
1269                 LDAP_LOG ( OPERATION, DETAIL1,
1270                         "re_encode_request: new request is:\n", 0, 0, 0 );
1271 #else
1272                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1273                     0, 0, 0 );
1274 #endif
1275                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1276         }
1277 #endif /* LDAP_DEBUG */
1278
1279         *type = tag;    /* return request type */
1280         return ber;
1281 }
1282
1283
1284 LDAPRequest *
1285 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1286 {
1287         LDAPRequest     *lr;
1288
1289 #ifdef LDAP_R_COMPILE
1290         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1291 #endif
1292         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1293                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1294                         continue;       /* Skip completed requests */
1295                 }
1296                 if ( msgid == lr->lr_msgid ) {
1297                         break;
1298                 }
1299         }
1300 #ifdef LDAP_R_COMPILE
1301         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1302 #endif
1303
1304         return( lr );
1305 }
1306
1307