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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 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 {
  87         LDAPURLDesc     *servers;
  88         int rc;
  89
  90 #ifdef NEW_LOGGING
  91         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_initial_request\n", 0, 0, 0 );
  92 #else
  93         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
  94 #endif
  95
  96         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
  97                 /* not connected yet */
  98                 int rc = ldap_open_defconn( ld );
  99
 100                 if( rc < 0 ) {
 101                         ber_free( ber, 1 );
 102                         return( -1 );
 103                 }
 104
 105 #ifdef NEW_LOGGING
 106                 LDAP_LOG ( OPERATION, DETAIL1,
 107                         "ldap_send_initial_request: ldap_open_defconn: successful\n" ,
 108                         0, 0, 0);
 109 #else
 110                 Debug( LDAP_DEBUG_TRACE,
 111                         "ldap_open_defconn: successful\n",
 112                         0, 0, 0 );
 113 #endif
 114         }
 115
 116         {
 117                 /*
 118                  * use of DNS is turned off or this is an X.500 DN...
 119                  * use our default connection
 120                  */
 121                 servers = NULL;
 122         }
 123
 124 #ifdef LDAP_CONNECTIONLESS
 125         if (LDAP_IS_UDP(ld)) {
 126                 if (msgtype == LDAP_REQ_BIND) {
 127                         if (ld->ld_options.ldo_cldapdn)
 128                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 129                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 130                         return 0;
 131                 }
 132                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 133                         return LDAP_PARAM_ERROR;
 134         }
 135 #endif
 136         rc = ldap_send_server_request( ld, ber, ld->ld_msgid, NULL,
 137                                                                         servers, NULL, NULL );
 138         if (servers)
 139                 ldap_free_urllist(servers);
 140         return(rc);
 141 }
 142
 143
 144 int
 145 ldap_int_flush_request(
 146         LDAP *ld,
 147         LDAPRequest *lr
 148 )
 149 {
 150         LDAPConn *lc = lr->lr_conn;
 151
 152         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 153                 if ( errno == EAGAIN ) {
 154                         /* need to continue write later */
 155                         lr->lr_status = LDAP_REQST_WRITING;
 156                         ldap_mark_select_write( ld, lc->lconn_sb );
 157                         ld->ld_errno = LDAP_BUSY;
 158                         return -2;
 159                 } else {
 160                         ld->ld_errno = LDAP_SERVER_DOWN;
 161                         ldap_free_request( ld, lr );
 162                         ldap_free_connection( ld, lc, 0, 0 );
 163                         return( -1 );
 164                 }
 165         } else {
 166                 if ( lr->lr_parent == NULL ) {
 167                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 168                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 169                 }
 170                 lr->lr_status = LDAP_REQST_INPROGRESS;
 171
 172                 /* sent -- waiting for a response */
 173                 ldap_mark_select_read( ld, lc->lconn_sb );
 174         }
 175         return 0;
 176 }
 177
 178 int
 179 ldap_send_server_request(
 180         LDAP *ld,
 181         BerElement *ber,
 182         ber_int_t msgid,
 183         LDAPRequest *parentreq,
 184         LDAPURLDesc *srvlist,
 185         LDAPConn *lc,
 186         LDAPreqinfo *bind )
 187 {
 188         LDAPRequest     *lr;
 189         int incparent;
 190
 191 #ifdef NEW_LOGGING
 192         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_server_request\n", 0, 0, 0 );
 193 #else
 194         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 195 #endif
 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                         if (( lc = find_connection( ld, srvlist, 1 )) ==
 205                             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         if ( ld->ld_requests &&
 236                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 237                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 ) {
 238                 return -1;
 239         }
 240
 241         if (( lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ))) ==
 242             NULL ) {
 243                 ld->ld_errno = LDAP_NO_MEMORY;
 244                 ldap_free_connection( ld, lc, 0, 0 );
 245                 ber_free( ber, 1 );
 246                 if ( incparent ) {
 247                         /* Forget about the bind */
 248                         --parentreq->lr_outrefcnt;
 249                 }
 250                 return( -1 );
 251         }
 252         lr->lr_msgid = msgid;
 253         lr->lr_status = LDAP_REQST_INPROGRESS;
 254         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 255         lr->lr_ber = ber;
 256         lr->lr_conn = lc;
 257         if ( parentreq != NULL ) {      /* sub-request */
 258                 if ( !incparent ) {
 259                         /* Increment if we didn't do it before the bind */
 260                         ++parentreq->lr_outrefcnt;
 261                 }
 262                 lr->lr_origid = parentreq->lr_origid;
 263                 lr->lr_parentcnt = parentreq->lr_parentcnt + 1;
 264                 lr->lr_parent = parentreq;
 265                 lr->lr_refnext = parentreq->lr_child;
 266                 parentreq->lr_child = lr;
 267         } else {                        /* original request */
 268                 lr->lr_origid = lr->lr_msgid;
 269         }
 270
 271         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 272                 lr->lr_next->lr_prev = lr;
 273         }
 274         ld->ld_requests = lr;
 275         lr->lr_prev = NULL;
 276
 277         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 278                 return -1;
 279         }
 280
 281         ld->ld_errno = LDAP_SUCCESS;
 282         return( msgid );
 283 }
 284
 285 LDAPConn *
 286 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 287         int connect, LDAPreqinfo *bind )
 288 {
 289         LDAPConn        *lc;
 290         LDAPURLDesc     *srv;
 291         Sockbuf         *sb = NULL;
 292
 293 #ifdef NEW_LOGGING
 294         LDAP_LOG ( OPERATION, ENTRY, "ldap_new_connection\n", 0, 0, 0 );
 295 #else
 296         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection\n", 0, 0, 0 );
 297 #endif
 298         /*
 299          * make a new LDAP server connection
 300          * XXX open connection synchronously for now
 301          */
 302         if (( lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ))) == NULL ||
 303             ( !use_ldsb && ( (sb = ber_sockbuf_alloc()) == NULL ))) {
 304                 if ( lc != NULL ) {
 305                         LDAP_FREE( (char *)lc );
 306                 }
 307                 ld->ld_errno = LDAP_NO_MEMORY;
 308                 return( NULL );
 309         }
 310
 311         lc->lconn_sb = ( use_ldsb ) ? ld->ld_sb : sb;
 312
 313         if ( connect ) {
 314                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 315                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 ) {
 316                                 break;
 317                         }
 318                 }
 319
 320                 if ( srv == NULL ) {
 321                         if ( !use_ldsb ) {
 322                                 ber_sockbuf_free( lc->lconn_sb );
 323                         }
 324                     LDAP_FREE( (char *)lc );
 325                     ld->ld_errno = LDAP_SERVER_DOWN;
 326                     return( NULL );
 327                 }
 328
 329                 lc->lconn_server = ldap_url_dup(srv);
 330         }
 331
 332         lc->lconn_status = LDAP_CONNST_CONNECTED;
 333         lc->lconn_next = ld->ld_conns;
 334         ld->ld_conns = lc;
 335
 336         /*
 337          * XXX for now, we always do a synchronous bind.  This will have
 338          * to change in the long run...
 339          */
 340         if ( bind != NULL) {
 341                 int             err = 0;
 342                 LDAPConn        *savedefconn;
 343
 344                 /* Set flag to prevent additional referrals from being processed on this
 345                  * connection until the bind has completed
 346                  */
 347                 lc->lconn_rebind_inprogress = 1;
 348                 /* V3 rebind function */
 349                 if ( ld->ld_rebind_proc != NULL) {
 350                         LDAPURLDesc     *srvfunc;
 351                         if( ( srvfunc = ldap_url_dup( srvlist)) == NULL) {
 352                                 ld->ld_errno = LDAP_NO_MEMORY;
 353                                 err = -1;
 354                         } else {
 355                                 savedefconn = ld->ld_defconn;
 356                                 ++lc->lconn_refcnt;     /* avoid premature free */
 357                                 ld->ld_defconn = lc;
 358
 359 #ifdef NEW_LOGGING
 360                                 LDAP_LOG ( OPERATION, DETAIL1,
 361                                         "ldap_new_connection: Call application rebind_proc\n",
 362                                         0, 0, 0 );
 363 #else
 364                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 365 #endif
 366                                 err = (*ld->ld_rebind_proc)( ld,
 367                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 368                                         ld->ld_rebind_params );
 369
 370                                 ld->ld_defconn = savedefconn;
 371                                 --lc->lconn_refcnt;
 372
 373                                 if( err != 0) {
 374                                 err = -1;
 375                                         ldap_free_connection( ld, lc, 1, 0 );
 376                                         lc = NULL;
 377                         }
 378                                 ldap_free_urldesc( srvfunc);
 379                 }
 380                 } else {
 381                         savedefconn = ld->ld_defconn;
 382                         ++lc->lconn_refcnt;     /* avoid premature free */
 383                         ld->ld_defconn = lc;
 384
 385 #ifdef NEW_LOGGING
 386                         LDAP_LOG ( OPERATION, DETAIL1,
 387                                 "ldap_new_connection: anonymous rebind via ldap_bind_s\n",
 388                                 0, 0, 0 );
 389 #else
 390                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 391 #endif
 392                         if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
 393                                 err = -1;
 394                         }
 395                         ld->ld_defconn = savedefconn;
 396                         --lc->lconn_refcnt;
 397
 398                 if ( err != 0 ) {
 399                         ldap_free_connection( ld, lc, 1, 0 );
 400                         lc = NULL;
 401                 }
 402         }
 403                 if( lc != NULL)
 404                         lc->lconn_rebind_inprogress = 0;
 405         }
 406
 407         return( lc );
 408 }
 409
 410
 411 static LDAPConn *
 412 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 413 /*
 414  * return an existing connection (if any) to the server srv
 415  * if "any" is non-zero, check for any server in the "srv" chain
 416  */
 417 {
 418         LDAPConn        *lc;
 419         LDAPURLDesc     *ls;
 420
 421         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 422                 for ( ls = srv; ls != NULL; ls = ls->lud_next ) {
 423                         if ( lc->lconn_server->lud_host != NULL &&
 424                                 *lc->lconn_server->lud_host != '\0' &&
 425                             ls->lud_host != NULL && *ls->lud_host != '\0' &&
 426                                 strcasecmp( ls->lud_host, lc->lconn_server->lud_host ) == 0
 427                             && ls->lud_port == lc->lconn_server->lud_port ) {
 428                                 return lc;
 429                         }
 430                         if ( !any ) {
 431                                 break;
 432                         }
 433                 }
 434         }
 435
 436         return NULL;
 437 }
 438
 439
 440
 441 static void
 442 use_connection( LDAP *ld, LDAPConn *lc )
 443 {
 444         ++lc->lconn_refcnt;
 445         lc->lconn_lastused = time( NULL );
 446 }
 447
 448
 449 void
 450 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 451 {
 452         LDAPConn        *tmplc, *prevlc;
 453
 454 #ifdef NEW_LOGGING
 455         LDAP_LOG ( OPERATION, ENTRY, "ldap_free_connection\n", 0, 0, 0 );
 456 #else
 457         Debug( LDAP_DEBUG_TRACE, "ldap_free_connection\n", 0, 0, 0 );
 458 #endif
 459
 460         if ( force || --lc->lconn_refcnt <= 0 ) {
 461                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 462                         ldap_mark_select_clear( ld, lc->lconn_sb );
 463                         if ( unbind ) {
 464                                 ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
 465                         }
 466                 }
 467
 468                 if( lc->lconn_ber != NULL ) {
 469                         ber_free( lc->lconn_ber, 1 );
 470                 }
 471
 472                 ldap_int_sasl_close( ld, lc );
 473
 474                 prevlc = NULL;
 475                 for ( tmplc = ld->ld_conns; tmplc != NULL;
 476                     tmplc = tmplc->lconn_next ) {
 477                         if ( tmplc == lc ) {
 478                                 if ( prevlc == NULL ) {
 479                                     ld->ld_conns = tmplc->lconn_next;
 480                                 } else {
 481                                     prevlc->lconn_next = tmplc->lconn_next;
 482                                 }
 483                                 break;
 484                         }
 485                         prevlc = tmplc;
 486                 }
 487                 ldap_free_urllist( lc->lconn_server );
 488 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 489                 if ( lc->lconn_krbinstance != NULL ) {
 490                         LDAP_FREE( lc->lconn_krbinstance );
 491                 }
 492 #endif
 493                 if ( lc->lconn_sb != ld->ld_sb ) {
 494                         ber_sockbuf_free( lc->lconn_sb );
 495                 }
 496                 if( lc->lconn_rebind_queue != NULL) {
 497                         int i;
 498                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++) {
 499                                 LDAP_VFREE(lc->lconn_rebind_queue[i]);
 500                         }
 501                         LDAP_FREE( lc->lconn_rebind_queue);
 502                 }
 503                 LDAP_FREE( lc );
 504 #ifdef NEW_LOGGING
 505                 LDAP_LOG ( OPERATION, RESULTS,
 506                         "ldap_free_connection: actually freed\n", 0, 0, 0 );
 507 #else
 508                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
 509                     0, 0, 0 );
 510 #endif
 511         } else {
 512                 lc->lconn_lastused = time( NULL );
 513 #ifdef NEW_LOGGING
 514                 LDAP_LOG ( OPERATION, RESULTS, "ldap_free_connection: refcnt %d\n",
 515                         lc->lconn_refcnt, 0, 0 );
 516 #else
 517                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 518                     lc->lconn_refcnt, 0, 0 );
 519 #endif
 520         }
 521 }
 522
 523
 524 #ifdef LDAP_DEBUG
 525 void
 526 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 527 {
 528         LDAPConn        *lc;
 529         char            timebuf[32];
 530
 531         fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
 532         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 533                 if ( lc->lconn_server != NULL ) {
 534                         fprintf( stderr, "* host: %s  port: %d%s\n",
 535                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 536                             : lc->lconn_server->lud_host,
 537                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 538                             ld->ld_sb ) ? "  (default)" : "" );
 539                 }
 540                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 541                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 542                     "NeedSocket" : ( lc->lconn_status ==
 543                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 544                 fprintf( stderr, "  last used: %s",
 545                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 546                 if( lc->lconn_rebind_inprogress ) {
 547                         fprintf( stderr, "  rebind in progress\n");
 548                         if( lc->lconn_rebind_queue != NULL) {
 549                                 int i = 0;
 550                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 551                                         int j = 0;
 552                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 553                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 554                                                         i, j, lc->lconn_rebind_queue[i][j]);
 555                                         }
 556                                 }
 557                         } else {
 558                                 fprintf( stderr, "    queue is empty\n");
 559                         }
 560                 }
 561                 fprintf(stderr, "\n");
 562                 if ( !all ) {
 563                         break;
 564                 }
 565         }
 566 }
 567
 568
 569 void
 570 ldap_dump_requests_and_responses( LDAP *ld )
 571 {
 572         LDAPRequest     *lr;
 573         LDAPMessage     *lm, *l;
 574
 575         fprintf( stderr, "** Outstanding Requests:\n" );
 576         if (( lr = ld->ld_requests ) == NULL ) {
 577                 fprintf( stderr, "   Empty\n" );
 578         }
 579         for ( ; lr != NULL; lr = lr->lr_next ) {
 580             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 581                 lr->lr_msgid, lr->lr_origid,
 582                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 583                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 584                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 585                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 586                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
 587             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 588                     lr->lr_outrefcnt, lr->lr_parentcnt );
 589         }
 590
 591         fprintf( stderr, "** Response Queue:\n" );
 592         if (( lm = ld->ld_responses ) == NULL ) {
 593                 fprintf( stderr, "   Empty\n" );
 594         }
 595         for ( ; lm != NULL; lm = lm->lm_next ) {
 596                 fprintf( stderr, " * msgid %d,  type %lu\n",
 597                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 598                 if (( l = lm->lm_chain ) != NULL ) {
 599                         fprintf( stderr, "   chained responses:\n" );
 600                         for ( ; l != NULL; l = l->lm_chain ) {
 601                                 fprintf( stderr,
 602                                     "  * msgid %d,  type %lu\n",
 603                                     l->lm_msgid,
 604                                     (unsigned long) l->lm_msgtype );
 605                         }
 606                 }
 607         }
 608 }
 609 #endif /* LDAP_DEBUG */
 610
 611 void
 612 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 613 {
 614         if ( lr->lr_prev == NULL ) {
 615                 ld->ld_requests = lr->lr_next;
 616         } else {
 617                 lr->lr_prev->lr_next = lr->lr_next;
 618         }
 619
 620         if ( lr->lr_next != NULL ) {
 621                 lr->lr_next->lr_prev = lr->lr_prev;
 622         }
 623
 624         if ( lr->lr_ber != NULL ) {
 625                 ber_free( lr->lr_ber, 1 );
 626         }
 627
 628         if ( lr->lr_res_error != NULL ) {
 629                 LDAP_FREE( lr->lr_res_error );
 630         }
 631
 632         if ( lr->lr_res_matched != NULL ) {
 633                 LDAP_FREE( lr->lr_res_matched );
 634         }
 635
 636         LDAP_FREE( lr );
 637 }
 638
 639 void
 640 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 641 {
 642         LDAPRequest     **ttmplr;
 643
 644 #ifdef NEW_LOGGING
 645         LDAP_LOG ( OPERATION, ARGS, "ldap_free_request (origid %d, msgid %d)\n",
 646                 lr->lr_origid, lr->lr_msgid, 0 );
 647 #else
 648         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 649                 lr->lr_origid, lr->lr_msgid, 0 );
 650 #endif
 651
 652         /* free all referrals (child requests) */
 653         while ( lr->lr_child )
 654                 ldap_free_request( ld, lr->lr_child );
 655
 656         if ( lr->lr_parent != NULL ) {
 657                 --lr->lr_parent->lr_outrefcnt;
 658                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 659                 if ( *ttmplr == lr )
 660                         *ttmplr = lr->lr_refnext;
 661         }
 662         ldap_free_request_int( ld, lr );
 663 }
 664
 665
 666 /*
 667  * Chase v3 referrals
 668  *
 669  * Parameters:
 670  *  (IN) ld = LDAP connection handle
 671  *  (IN) lr = LDAP Request structure
 672  *  (IN) refs = array of pointers to referral strings that we will chase
 673  *              The array will be free'd by this function when no longer needed
 674  *  (IN) sref != 0 if following search reference
 675  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 676  *  (OUT) hadrefp = 1 if sucessfully followed referral
 677  *
 678  * Return value - number of referrals followed
 679  */
 680 int
 681 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 682 {
 683         char            *unfollowed;
 684         int                      unfollowedcnt = 0;
 685         LDAPRequest     *origreq;
 686         LDAPURLDesc     *srv = NULL;
 687         BerElement      *ber;
 688         char            **refarray = NULL;
 689         LDAPConn        *lc;
 690         int                      rc, count, i, j;
 691         LDAPreqinfo  rinfo;
 692
 693         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 694         *hadrefp = 0;
 695
 696 #ifdef NEW_LOGGING
 697         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_v3referrals\n", 0, 0, 0 );
 698 #else
 699         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 700 #endif
 701
 702         unfollowed = NULL;
 703         rc = count = 0;
 704
 705         /* If no referrals in array, return */
 706         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 707                 rc = 0;
 708                 goto done;
 709         }
 710
 711         /* Check for hop limit exceeded */
 712         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 713 #ifdef NEW_LOGGING
 714                 LDAP_LOG ( OPERATION, DETAIL1,
 715                         "ldap_chase_v3referrals: more than %d referral hops (dropping)\n",
 716                         ld->ld_refhoplimit, 0, 0 );
 717 #else
 718                 Debug( LDAP_DEBUG_ANY,
 719                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 720 #endif
 721                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 722             rc = -1;
 723                 goto done;
 724         }
 725
 726         /* find original request */
 727         for ( origreq = lr;
 728                 origreq->lr_parent != NULL;
 729                 origreq = origreq->lr_parent )
 730         {
 731                 /* empty */ ;
 732         }
 733
 734         refarray = refs;
 735         refs = NULL;
 736         /* parse out & follow referrals */
 737         for( i=0; refarray[i] != NULL; i++) {
 738                 /* Parse the referral URL */
 739                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 740                         ld->ld_errno = rc;
 741                         rc = -1;
 742                         goto done;
 743                 }
 744
 745                 if( srv->lud_crit_exts ) {
 746                         /* we do not support any extensions */
 747                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 748                         rc = -1;
 749                         goto done;
 750                 }
 751
 752                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 753                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 754                         LDAP_FREE( srv->lud_dn );
 755                         srv->lud_dn = NULL;
 756                 }
 757
 758                 /* check connection for re-bind in progress */
 759                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 760                         if( lc->lconn_rebind_inprogress) {
 761                                 /* We are already chasing a referral or search reference and a
 762                                  * bind on that connection is in progress.  We must queue
 763                                  * referrals on that connection, so we don't get a request
 764                                  * going out before the bind operation completes. This happens
 765                                  * if two search references come in one behind the other
 766                                  * for the same server with different contexts.
 767                                  */
 768 #ifdef NEW_LOGGING
 769                                 LDAP_LOG ( OPERATION, DETAIL1,
 770                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 771                                         refarray[i], 0, 0 );
 772 #else
 773                                 Debug( LDAP_DEBUG_TRACE,
 774                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 775                                         refarray[i], 0, 0);
 776 #endif
 777                                 if( lc->lconn_rebind_queue == NULL ) {
 778                                         /* Create a referral list */
 779                                         lc->lconn_rebind_queue =
 780                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 781
 782                                         if( lc->lconn_rebind_queue == NULL) {
 783                                                 ld->ld_errno = LDAP_NO_MEMORY;
 784                                                 rc = -1;
 785                                                 goto done;
 786                                         }
 787
 788                                         lc->lconn_rebind_queue[0] = refarray;
 789                                         lc->lconn_rebind_queue[1] = NULL;
 790                                         refarray = NULL;
 791
 792                                 } else {
 793                                         /* Count how many referral arrays we already have */
 794                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 795                                                 /* empty */;
 796                                         }
 797
 798                                         /* Add the new referral to the list */
 799                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 800                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 801
 802                                         if( lc->lconn_rebind_queue == NULL ) {
 803                                                 ld->ld_errno = LDAP_NO_MEMORY;
 804                                                 rc = -1;
 805                                                 goto done;
 806                                         }
 807                                         lc->lconn_rebind_queue[j] = refarray;
 808                                         lc->lconn_rebind_queue[j+1] = NULL;
 809                                         refarray = NULL;
 810                                 }
 811
 812                                 /* We have queued the referral/reference, now just return */
 813                                 rc = 0;
 814                                 *hadrefp = 1;
 815                                 count = 1; /* Pretend we already followed referral */
 816                                 goto done;
 817                         }
 818                 }
 819                 /* Re-encode the request with the new starting point of the search.
 820                  * Note: In the future we also need to replace the filter if one
 821                  * was provided with the search reference
 822                  */
 823
 824                 /* For references we don't want old dn if new dn empty */
 825                 if ( sref && srv->lud_dn == NULL ) {
 826                         srv->lud_dn = LDAP_STRDUP( "" );
 827                 }
 828
 829                 ber = re_encode_request( ld, origreq->lr_ber, ++ld->ld_msgid,
 830                         sref, srv, &rinfo.ri_request );
 831
 832                 if( ber == NULL ) {
 833                         ld->ld_errno = LDAP_ENCODING_ERROR;
 834                         rc = -1;
 835                         goto done;
 836                 }
 837
 838 #ifdef NEW_LOGGING
 839                 LDAP_LOG ( OPERATION, DETAIL1,
 840                         "ldap_chase_v3referrals: msgid %d, url \"%s\"\n",
 841                         lr->lr_msgid, refarray[i], 0 );
 842 #else
 843                 Debug( LDAP_DEBUG_TRACE,
 844                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 845                         lr->lr_msgid, refarray[i], 0);
 846 #endif
 847
 848                 /* Send the new request to the server - may require a bind */
 849                 rinfo.ri_msgid = origreq->lr_origid;
 850                 rinfo.ri_url = refarray[i];
 851                 if ( (rc = ldap_send_server_request( ld, ber, ld->ld_msgid,
 852                         origreq, srv, NULL, &rinfo )) < 0 ) {
 853                         /* Failure, try next referral in the list */
 854 #ifdef NEW_LOGGING
 855                         LDAP_LOG ( OPERATION, ERR,
 856                         "ldap_chase_v3referrals: Unable to chase referral \"%s\" (%s)\n",
 857                         refarray[i], ldap_err2string( ld->ld_errno ), 0 );
 858 #else
 859                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
 860                                 refarray[i], ldap_err2string( ld->ld_errno ), 0);
 861 #endif
 862                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
 863                         ldap_free_urllist(srv);
 864                         srv = NULL;
 865                 } else {
 866                         /* Success, no need to try this referral list further */
 867                         rc = 0;
 868                         ++count;
 869                         *hadrefp = 1;
 870
 871                         /* check if there is a queue of referrals that came in during bind */
 872                         if( lc == NULL) {
 873                                 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
 874                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 875                                         rc = -1;
 876                                         goto done;
 877                                 }
 878                         }
 879
 880                         if( lc->lconn_rebind_queue != NULL) {
 881                                 /* Release resources of previous list */
 882                                 LDAP_VFREE(refarray);
 883                                 refarray = NULL;
 884                                 ldap_free_urllist(srv);
 885                                 srv = NULL;
 886
 887                                 /* Pull entries off end of queue so list always null terminated */
 888                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 889                                         ;
 890                                 }
 891                                 refarray = lc->lconn_rebind_queue[j-1];
 892                                 lc->lconn_rebind_queue[j-1] = NULL;
 893                                 /* we pulled off last entry from queue, free queue */
 894                                 if ( j == 1 ) {
 895                                         LDAP_FREE( lc->lconn_rebind_queue);
 896                                         lc->lconn_rebind_queue = NULL;
 897                                 }
 898                                 /* restart the loop the with new referral list */
 899                                 i = -1;
 900                                 continue;
 901                         }
 902                         break; /* referral followed, break out of for loop */
 903                 }
 904         } /* end for loop */
 905 done:
 906         LDAP_VFREE(refarray);
 907         ldap_free_urllist(srv);
 908         LDAP_FREE( *errstrp );
 909
 910         if( rc == 0) {
 911                 *errstrp = NULL;
 912                 LDAP_FREE( unfollowed );
 913                 return count;
 914         } else {
 915                 ld->ld_errno = LDAP_REFERRAL;
 916                 *errstrp = unfollowed;
 917                 return rc;
 918         }
 919 }
 920
 921 /*
 922  * XXX merging of errors in this routine needs to be improved
 923  */
 924 int
 925 ldap_chase_referrals( LDAP *ld,
 926         LDAPRequest *lr,
 927         char **errstrp,
 928         int sref,
 929         int *hadrefp )
 930 {
 931         int             rc, count;
 932         unsigned        len;
 933         char            *p, *ref, *unfollowed;
 934         LDAPRequest     *origreq;
 935         LDAPURLDesc     *srv;
 936         BerElement      *ber;
 937         LDAPreqinfo  rinfo;
 938
 939 #ifdef NEW_LOGGING
 940         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_referrals\n", 0, 0, 0 );
 941 #else
 942         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 943 #endif
 944
 945         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 946         *hadrefp = 0;
 947
 948         if ( *errstrp == NULL ) {
 949                 return( 0 );
 950         }
 951
 952         len = strlen( *errstrp );
 953         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
 954                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
 955                         *p = '\0';
 956                         p += LDAP_REF_STR_LEN;
 957                         break;
 958                 }
 959         }
 960
 961         if ( len < LDAP_REF_STR_LEN ) {
 962                 return( 0 );
 963         }
 964
 965         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 966 #ifdef NEW_LOGGING
 967                 LDAP_LOG ( OPERATION, ENTRY,
 968                         "ldap_chase_referrals: more than %d referral hops (dropping)\n",
 969                         ld->ld_refhoplimit, 0, 0 );
 970 #else
 971                 Debug( LDAP_DEBUG_ANY,
 972                     "more than %d referral hops (dropping)\n",
 973                     ld->ld_refhoplimit, 0, 0 );
 974 #endif
 975                     /* XXX report as error in ld->ld_errno? */
 976                     return( 0 );
 977         }
 978
 979         /* find original request */
 980         for ( origreq = lr; origreq->lr_parent != NULL;
 981              origreq = origreq->lr_parent ) {
 982                 /* empty */;
 983         }
 984
 985         unfollowed = NULL;
 986         rc = count = 0;
 987
 988         /* parse out & follow referrals */
 989         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
 990                 if (( p = strchr( ref, '\n' )) != NULL ) {
 991                         *p++ = '\0';
 992                 } else {
 993                         p = NULL;
 994                 }
 995
 996                 rc = ldap_url_parse_ext( ref, &srv );
 997
 998                 if ( rc != LDAP_URL_SUCCESS ) {
 999 #ifdef NEW_LOGGING
1000                         LDAP_LOG ( OPERATION, DETAIL1,
1001                                 "ldap_chase_referrals: ignoring unknown referral <%s>\n",
1002                                 ref, 0, 0 );
1003 #else
1004                         Debug( LDAP_DEBUG_TRACE,
1005                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1006 #endif
1007                         rc = ldap_append_referral( ld, &unfollowed, ref );
1008                         *hadrefp = 1;
1009                         continue;
1010                 }
1011
1012                 if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1013                         LDAP_FREE( srv->lud_dn );
1014                         srv->lud_dn = NULL;
1015                 }
1016
1017 #ifdef NEW_LOGGING
1018                 LDAP_LOG ( OPERATION, DETAIL1,
1019                         "ldap_chase_referrals: chasing LDAP referral <%s>\n", ref, 0, 0 );
1020 #else
1021                 Debug( LDAP_DEBUG_TRACE,
1022                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1023 #endif
1024
1025                 *hadrefp = 1;
1026
1027                 ber = re_encode_request( ld, origreq->lr_ber,
1028                     ++ld->ld_msgid, sref, srv, &rinfo.ri_request );
1029
1030                 if( ber == NULL ) {
1031                         return -1 ;
1032                 }
1033
1034                 /* copy the complete referral for rebind process */
1035                 rinfo.ri_url = LDAP_STRDUP( ref );
1036
1037                 rinfo.ri_msgid = origreq->lr_origid;
1038
1039                 rc = ldap_send_server_request( ld, ber, ld->ld_msgid,
1040                     lr, srv, NULL, &rinfo );
1041
1042                 LDAP_FREE( rinfo.ri_url );
1043
1044                 if( rc >= 0 ) {
1045                         ++count;
1046                 } else {
1047 #ifdef NEW_LOGGING
1048                         LDAP_LOG ( OPERATION, ERR,
1049                                 "ldap_chase_referrals: Unable to chase referral <%s>\n",
1050                                 ldap_err2string( ld->ld_errno), 0, 0 );
1051 #else
1052                         Debug( LDAP_DEBUG_ANY,
1053                             "Unable to chase referral (%s)\n",
1054                             ldap_err2string( ld->ld_errno ), 0, 0 );
1055 #endif
1056                         rc = ldap_append_referral( ld, &unfollowed, ref );
1057                 }
1058
1059                 ldap_free_urllist(srv);
1060         }
1061
1062         LDAP_FREE( *errstrp );
1063         *errstrp = unfollowed;
1064
1065         return(( rc == 0 ) ? count : rc );
1066 }
1067
1068
1069 int
1070 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1071 {
1072         int     first;
1073
1074         if ( *referralsp == NULL ) {
1075                 first = 1;
1076                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1077                     + 1 );
1078         } else {
1079                 first = 0;
1080                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1081                     strlen( *referralsp ) + strlen( s ) + 2 );
1082         }
1083
1084         if ( *referralsp == NULL ) {
1085                 ld->ld_errno = LDAP_NO_MEMORY;
1086                 return( -1 );
1087         }
1088
1089         if ( first ) {
1090                 strcpy( *referralsp, LDAP_REF_STR );
1091         } else {
1092                 strcat( *referralsp, "\n" );
1093         }
1094         strcat( *referralsp, s );
1095
1096         return( 0 );
1097 }
1098
1099
1100
1101 static BerElement *
1102 re_encode_request( LDAP *ld,
1103         BerElement *origber,
1104         ber_int_t msgid,
1105         int sref,
1106         LDAPURLDesc *srv,
1107         int *type )
1108 {
1109         /*
1110          * XXX this routine knows way too much about how the lber library works!
1111          */
1112         ber_int_t       along;
1113         ber_tag_t       tag;
1114         ber_tag_t       rtag;
1115         ber_int_t       ver;
1116         ber_int_t       scope;
1117         int             rc;
1118         BerElement      tmpber, *ber;
1119         char            *orig_dn;
1120         char            *dn;
1121
1122 #ifdef NEW_LOGGING
1123         LDAP_LOG ( OPERATION, ARGS,
1124                 "re_encode_request: new msgid %ld, new dn <%s>\n",
1125                 (long) msgid,
1126                 ( srv == NULL || srv->lud_dn == NULL ) ? "NONE" : srv->lud_dn, 0 );
1127 #else
1128         Debug( LDAP_DEBUG_TRACE,
1129             "re_encode_request: new msgid %ld, new dn <%s>\n",
1130             (long) msgid,
1131                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1132 #endif
1133
1134         tmpber = *origber;
1135
1136         /*
1137          * all LDAP requests are sequences that start with a message id.
1138          * For all except delete, this is followed by a sequence that is
1139          * tagged with the operation code.  For delete, the provided DN
1140          * is not wrapped by a sequence.
1141          */
1142         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1143
1144         if ( rtag == LBER_ERROR ) {
1145                 ld->ld_errno = LDAP_DECODING_ERROR;
1146                 return( NULL );
1147         }
1148
1149         assert( tag != 0);
1150         if ( tag == LDAP_REQ_BIND ) {
1151                 /* bind requests have a version number before the DN & other stuff */
1152                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1153
1154         } else if ( tag == LDAP_REQ_DELETE ) {
1155                 /* delete requests don't have a DN wrapping sequence */
1156                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1157
1158         } else if ( tag == LDAP_REQ_SEARCH ) {
1159                 /* search requests need to be re-scope-ed */
1160                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1161
1162                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1163                         /* use the scope provided in reference */
1164                         scope = srv->lud_scope;
1165
1166                 } else if ( sref && scope != LDAP_SCOPE_SUBTREE ) {
1167                         /* use scope implied by previous operation */
1168                         /*   base -> base */
1169                         /*   one -> base */
1170                         /*   subtree -> subtree */
1171                         scope = LDAP_SCOPE_BASE;
1172                 }
1173
1174         } else {
1175                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1176         }
1177
1178         if( rtag == LBER_ERROR ) {
1179                 ld->ld_errno = LDAP_DECODING_ERROR;
1180                 return NULL;
1181         }
1182
1183         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1184                 return NULL;
1185         }
1186
1187         if ( srv->lud_dn == NULL ) {
1188                 dn = orig_dn;
1189         } else {
1190                 dn = srv->lud_dn;
1191         }
1192
1193         if ( tag == LDAP_REQ_BIND ) {
1194                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1195         } else if ( tag == LDAP_REQ_DELETE ) {
1196                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1197         } else if ( tag == LDAP_REQ_SEARCH ) {
1198                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1199         } else {
1200                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1201         }
1202
1203         LDAP_FREE( orig_dn );
1204
1205         if ( rc == -1 ) {
1206                 ld->ld_errno = LDAP_ENCODING_ERROR;
1207                 ber_free( ber, 1 );
1208                 return NULL;
1209         }
1210
1211         if ( tag != LDAP_REQ_DELETE && (
1212                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1213                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1214             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1215         {
1216                 ld->ld_errno = LDAP_ENCODING_ERROR;
1217                 ber_free( ber, 1 );
1218                 return NULL;
1219         }
1220
1221 #ifdef LDAP_DEBUG
1222         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1223 #ifdef NEW_LOGGING
1224                 LDAP_LOG ( OPERATION, DETAIL1,
1225                         "re_encode_request: new request is:\n", 0, 0, 0 );
1226 #else
1227                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1228                     0, 0, 0 );
1229 #endif
1230                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1231         }
1232 #endif /* LDAP_DEBUG */
1233
1234         *type = tag;    /* return request type */
1235         return ber;
1236 }
1237
1238
1239 LDAPRequest *
1240 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1241 {
1242         LDAPRequest     *lr;
1243
1244         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1245                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1246                         continue;       /* Skip completed requests */
1247                 }
1248                 if ( msgid == lr->lr_msgid ) {
1249                         break;
1250                 }
1251         }
1252
1253         return( lr );
1254 }
1255
1256