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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2005 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  */
  18 /* This notice applies to changes, created by or for Novell, Inc.,
  19  * to preexisting works for which notices appear elsewhere in this file.
  20  *
  21  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  22  *
  23  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  24  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  25  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  26  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  27  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  28  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  29  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  30  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  31  *---
  32  * Modification to OpenLDAP source by Novell, Inc.
  33  * April 2000 sfs  Added code to chase V3 referrals
  34  *  request.c - sending of ldap requests; handling of referrals
  35  *---
  36  * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
  37  * can be found in the file "build/LICENSE-2.0.1" in this distribution
  38  * of OpenLDAP Software.
  39  */
  40
  41 #include "portable.h"
  42
  43 #include <stdio.h>
  44
  45 #include <ac/stdlib.h>
  46
  47 #include <ac/errno.h>
  48 #include <ac/socket.h>
  49 #include <ac/string.h>
  50 #include <ac/time.h>
  51 #include <ac/unistd.h>
  52
  53 #include "ldap-int.h"
  54 #include "lber.h"
  55
  56 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
  57 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
  58 static void ldap_free_request_int LDAP_P(( LDAP *ld, LDAPRequest *lr ));
  59
  60 static BerElement *
  61 re_encode_request( LDAP *ld,
  62         BerElement *origber,
  63         ber_int_t msgid,
  64         int sref,
  65         LDAPURLDesc *srv,
  66         int *type );
  67
  68 BerElement *
  69 ldap_alloc_ber_with_options( LDAP *ld )
  70 {
  71         BerElement      *ber;
  72
  73     if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
  74                 ld->ld_errno = LDAP_NO_MEMORY;
  75         }
  76
  77         return( ber );
  78 }
  79
  80
  81 void
  82 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  83 {
  84         ber->ber_options = ld->ld_lberoptions;
  85 }
  86
  87
  88 ber_int_t
  89 ldap_send_initial_request(
  90         LDAP *ld,
  91         ber_tag_t msgtype,
  92         const char *dn,
  93         BerElement *ber,
  94         ber_int_t msgid)
  95 {
  96         LDAPURLDesc     *servers;
  97         int rc;
  98
  99         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
 100
 101         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 102                 /* not connected yet */
 103                 int rc = ldap_open_defconn( ld );
 104
 105                 if( rc < 0 ) {
 106                         ber_free( ber, 1 );
 107                         return( -1 );
 108                 }
 109
 110                 Debug( LDAP_DEBUG_TRACE,
 111                         "ldap_open_defconn: successful\n",
 112                         0, 0, 0 );
 113         }
 114
 115         {
 116                 /*
 117                  * use of DNS is turned off or this is an X.500 DN...
 118                  * use our default connection
 119                  */
 120                 servers = NULL;
 121         }
 122
 123 #ifdef LDAP_CONNECTIONLESS
 124         if (LDAP_IS_UDP(ld)) {
 125                 if (msgtype == LDAP_REQ_BIND) {
 126                         if (ld->ld_options.ldo_cldapdn)
 127                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 128                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 129                         return 0;
 130                 }
 131                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 132                         return LDAP_PARAM_ERROR;
 133         }
 134 #endif
 135 #ifdef LDAP_R_COMPILE
 136         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 137 #endif
 138         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 139                 servers, NULL, NULL );
 140 #ifdef LDAP_R_COMPILE
 141         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 142 #endif
 143         if (servers)
 144                 ldap_free_urllist(servers);
 145         return(rc);
 146 }
 147
 148
 149 int
 150 ldap_int_flush_request(
 151         LDAP *ld,
 152         LDAPRequest *lr )
 153 {
 154         LDAPConn *lc = lr->lr_conn;
 155
 156         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 157                 if ( errno == EAGAIN ) {
 158                         /* need to continue write later */
 159                         lr->lr_status = LDAP_REQST_WRITING;
 160                         ldap_mark_select_write( ld, lc->lconn_sb );
 161                         ld->ld_errno = LDAP_BUSY;
 162                         return -2;
 163                 } else {
 164                         ld->ld_errno = LDAP_SERVER_DOWN;
 165                         ldap_free_request( ld, lr );
 166                         ldap_free_connection( ld, lc, 0, 0 );
 167                         return( -1 );
 168                 }
 169         } else {
 170                 if ( lr->lr_parent == NULL ) {
 171                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 172                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 173                 }
 174                 lr->lr_status = LDAP_REQST_INPROGRESS;
 175
 176                 /* sent -- waiting for a response */
 177                 ldap_mark_select_read( ld, lc->lconn_sb );
 178         }
 179         return 0;
 180 }
 181
 182 int
 183 ldap_send_server_request(
 184         LDAP *ld,
 185         BerElement *ber,
 186         ber_int_t msgid,
 187         LDAPRequest *parentreq,
 188         LDAPURLDesc *srvlist,
 189         LDAPConn *lc,
 190         LDAPreqinfo *bind )
 191 {
 192         LDAPRequest     *lr;
 193         int incparent, rc;
 194
 195         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 196
 197         incparent = 0;
 198         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 199
 200         if ( lc == NULL ) {
 201                 if ( srvlist == NULL ) {
 202                         lc = ld->ld_defconn;
 203                 } else {
 204                         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         rc = 0;
 236         if ( ld->ld_requests &&
 237                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 238                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
 239         {
 240                 rc = -1;
 241         }
 242         if ( rc ) return rc;
 243
 244         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
 245         if ( lr == NULL ) {
 246                 ld->ld_errno = LDAP_NO_MEMORY;
 247                 ldap_free_connection( ld, lc, 0, 0 );
 248                 ber_free( ber, 1 );
 249                 if ( incparent ) {
 250                         /* Forget about the bind */
 251                         --parentreq->lr_outrefcnt;
 252                 }
 253                 return( -1 );
 254         }
 255         lr->lr_msgid = msgid;
 256         lr->lr_status = LDAP_REQST_INPROGRESS;
 257         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 258         lr->lr_ber = ber;
 259         lr->lr_conn = lc;
 260         if ( parentreq != NULL ) {      /* sub-request */
 261                 if ( !incparent ) {
 262                         /* Increment if we didn't do it before the bind */
 263                         ++parentreq->lr_outrefcnt;
 264                 }
 265                 lr->lr_origid = parentreq->lr_origid;
 266                 lr->lr_parentcnt = parentreq->lr_parentcnt + 1;
 267                 lr->lr_parent = parentreq;
 268                 lr->lr_refnext = parentreq->lr_child;
 269                 parentreq->lr_child = lr;
 270         } else {                        /* original request */
 271                 lr->lr_origid = lr->lr_msgid;
 272         }
 273
 274         lr->lr_prev = NULL;
 275         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 276                 lr->lr_next->lr_prev = lr;
 277         }
 278         ld->ld_requests = lr;
 279
 280         ld->ld_errno = LDAP_SUCCESS;
 281         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 282                 msgid = -1;
 283         }
 284
 285         return( msgid );
 286 }
 287
 288 LDAPConn *
 289 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 290         int connect, LDAPreqinfo *bind )
 291 {
 292         LDAPConn        *lc;
 293         LDAPURLDesc     *srv;
 294
 295         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
 296                 use_ldsb, connect, (bind != NULL) );
 297         /*
 298          * make a new LDAP server connection
 299          * XXX open connection synchronously for now
 300          */
 301         lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
 302         if ( lc == NULL ) {
 303                 ld->ld_errno = LDAP_NO_MEMORY;
 304                 return( NULL );
 305         }
 306
 307         if ( use_ldsb ) {
 308                 assert( ld->ld_sb );
 309                 lc->lconn_sb = ld->ld_sb;
 310
 311         } else {
 312                 lc->lconn_sb = ber_sockbuf_alloc();
 313                 if ( lc->lconn_sb == NULL ) {
 314                         LDAP_FREE( (char *)lc );
 315                         ld->ld_errno = LDAP_NO_MEMORY;
 316                         return( NULL );
 317                 }
 318         }
 319
 320         if ( connect ) {
 321                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 322                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 )
 323                         {
 324                                 break;
 325                         }
 326                 }
 327
 328                 if ( srv == NULL ) {
 329                         if ( !use_ldsb ) {
 330                                 ber_sockbuf_free( lc->lconn_sb );
 331                         }
 332                         LDAP_FREE( (char *)lc );
 333                         ld->ld_errno = LDAP_SERVER_DOWN;
 334                         return( NULL );
 335                 }
 336
 337                 lc->lconn_server = ldap_url_dup( srv );
 338         }
 339
 340         lc->lconn_status = LDAP_CONNST_CONNECTED;
 341         lc->lconn_next = ld->ld_conns;
 342         ld->ld_conns = lc;
 343
 344         /*
 345          * XXX for now, we always do a synchronous bind.  This will have
 346          * to change in the long run...
 347          */
 348         if ( bind != NULL) {
 349                 int             err = 0;
 350                 LDAPConn        *savedefconn;
 351
 352                 /* Set flag to prevent additional referrals
 353                  * from being processed on this
 354                  * connection until the bind has completed
 355                  */
 356                 lc->lconn_rebind_inprogress = 1;
 357                 /* V3 rebind function */
 358                 if ( ld->ld_rebind_proc != NULL) {
 359                         LDAPURLDesc     *srvfunc;
 360                         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                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 369 #ifdef LDAP_R_COMPILE
 370                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 371                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 372 #endif
 373                                 err = (*ld->ld_rebind_proc)( ld,
 374                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 375                                         ld->ld_rebind_params );
 376 #ifdef LDAP_R_COMPILE
 377                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 378                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 379 #endif
 380
 381                                 ld->ld_defconn = savedefconn;
 382                                 --lc->lconn_refcnt;
 383
 384                                 if ( err != 0 ) {
 385                                         err = -1;
 386                                         ldap_free_connection( ld, lc, 1, 0 );
 387                                         lc = NULL;
 388                                 }
 389                                 ldap_free_urldesc( srvfunc );
 390                         }
 391                 } else {
 392                         savedefconn = ld->ld_defconn;
 393                         ++lc->lconn_refcnt;     /* avoid premature free */
 394                         ld->ld_defconn = lc;
 395
 396                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 397 #ifdef LDAP_R_COMPILE
 398                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 399                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 400 #endif
 401                         if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
 402                                 err = -1;
 403                         }
 404 #ifdef LDAP_R_COMPILE
 405                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 406                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 407 #endif
 408                         ld->ld_defconn = savedefconn;
 409                         --lc->lconn_refcnt;
 410
 411                         if ( err != 0 ) {
 412                                 ldap_free_connection( ld, lc, 1, 0 );
 413                                 lc = NULL;
 414                         }
 415                 }
 416                 if ( lc != NULL )
 417                         lc->lconn_rebind_inprogress = 0;
 418         }
 419
 420         return( lc );
 421 }
 422
 423
 424 static LDAPConn *
 425 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 426 /*
 427  * return an existing connection (if any) to the server srv
 428  * if "any" is non-zero, check for any server in the "srv" chain
 429  */
 430 {
 431         LDAPConn        *lc;
 432         LDAPURLDesc     *lcu, *lsu;
 433         int lcu_port, lsu_port;
 434
 435         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 436                 lcu = lc->lconn_server;
 437                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 438                         lcu->lud_port );
 439
 440                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 441                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 442                                 lsu->lud_port );
 443
 444                         if ( strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 445                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 446                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 447                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0
 448                             && lsu_port == lcu_port )
 449                         {
 450                                 return lc;
 451                         }
 452
 453                         if ( !any ) break;
 454                 }
 455         }
 456
 457         return NULL;
 458 }
 459
 460
 461
 462 static void
 463 use_connection( LDAP *ld, LDAPConn *lc )
 464 {
 465         ++lc->lconn_refcnt;
 466         lc->lconn_lastused = time( NULL );
 467 }
 468
 469
 470 void
 471 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 472 {
 473         LDAPConn        *tmplc, *prevlc;
 474
 475         Debug( LDAP_DEBUG_TRACE,
 476                 "ldap_free_connection %d %d\n",
 477                 force, unbind, 0 );
 478
 479         if ( force || --lc->lconn_refcnt <= 0 ) {
 480                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 481                         ldap_mark_select_clear( ld, lc->lconn_sb );
 482                         if ( unbind ) {
 483                                 ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
 484                         }
 485                 }
 486
 487                 if ( lc->lconn_ber != NULL ) {
 488                         ber_free( lc->lconn_ber, 1 );
 489                 }
 490
 491                 ldap_int_sasl_close( ld, lc );
 492
 493                 prevlc = NULL;
 494                 for ( tmplc = ld->ld_conns; tmplc != NULL;
 495                     tmplc = tmplc->lconn_next ) {
 496                         if ( tmplc == lc ) {
 497                                 if ( prevlc == NULL ) {
 498                                     ld->ld_conns = tmplc->lconn_next;
 499                                 } else {
 500                                     prevlc->lconn_next = tmplc->lconn_next;
 501                                 }
 502                                 break;
 503                         }
 504                         prevlc = tmplc;
 505                 }
 506                 ldap_free_urllist( lc->lconn_server );
 507 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 508                 if ( lc->lconn_krbinstance != NULL ) {
 509                         LDAP_FREE( lc->lconn_krbinstance );
 510                 }
 511 #endif
 512
 513                 /* FIXME: is this at all possible? */
 514                 if ( force ) {
 515                         LDAPRequest     *lr;
 516
 517 #ifdef LDAP_R_COMPILE
 518                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 519 #endif
 520                         for ( lr = ld->ld_requests; lr; ) {
 521                                 LDAPRequest     *lr_next = lr->lr_next;
 522
 523                                 if ( lr->lr_conn == lc ) {
 524                                         ldap_free_request_int( ld, lr );
 525                                 }
 526
 527                                 lr = lr_next;
 528                         }
 529 #ifdef LDAP_R_COMPILE
 530                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 531 #endif
 532                 }
 533                 if ( lc->lconn_sb != ld->ld_sb ) {
 534                         ber_sockbuf_free( lc->lconn_sb );
 535                 }
 536                 if ( lc->lconn_rebind_queue != NULL) {
 537                         int i;
 538                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 539                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 540                         }
 541                         LDAP_FREE( lc->lconn_rebind_queue );
 542                 }
 543                 LDAP_FREE( lc );
 544                 Debug( LDAP_DEBUG_TRACE,
 545                         "ldap_free_connection: actually freed\n",
 546                         0, 0, 0 );
 547         } else {
 548                 lc->lconn_lastused = time( NULL );
 549                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 550                                 lc->lconn_refcnt, 0, 0 );
 551         }
 552 }
 553
 554
 555 #ifdef LDAP_DEBUG
 556 void
 557 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 558 {
 559         LDAPConn        *lc;
 560         char            timebuf[32];
 561
 562         fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
 563         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 564                 if ( lc->lconn_server != NULL ) {
 565                         fprintf( stderr, "* host: %s  port: %d%s\n",
 566                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 567                             : lc->lconn_server->lud_host,
 568                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 569                             ld->ld_sb ) ? "  (default)" : "" );
 570                 }
 571                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 572                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 573                     "NeedSocket" : ( lc->lconn_status ==
 574                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 575                 fprintf( stderr, "  last used: %s",
 576                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 577                 if( lc->lconn_rebind_inprogress ) {
 578                         fprintf( stderr, "  rebind in progress\n");
 579                         if( lc->lconn_rebind_queue != NULL) {
 580                                 int i = 0;
 581                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 582                                         int j = 0;
 583                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 584                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 585                                                         i, j, lc->lconn_rebind_queue[i][j]);
 586                                         }
 587                                 }
 588                         } else {
 589                                 fprintf( stderr, "    queue is empty\n");
 590                         }
 591                 }
 592                 fprintf(stderr, "\n");
 593                 if ( !all ) {
 594                         break;
 595                 }
 596         }
 597 }
 598
 599
 600 void
 601 ldap_dump_requests_and_responses( LDAP *ld )
 602 {
 603         LDAPRequest     *lr;
 604         LDAPMessage     *lm, *l;
 605
 606 #ifdef LDAP_R_COMPILE
 607         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 608 #endif
 609         fprintf( stderr, "** Outstanding Requests:\n" );
 610         if (( lr = ld->ld_requests ) == NULL ) {
 611                 fprintf( stderr, "   Empty\n" );
 612         }
 613         for ( ; lr != NULL; lr = lr->lr_next ) {
 614             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 615                 lr->lr_msgid, lr->lr_origid,
 616                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 617                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 618                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 619                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 620                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
 621             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 622                     lr->lr_outrefcnt, lr->lr_parentcnt );
 623         }
 624 #ifdef LDAP_R_COMPILE
 625         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 626 #endif
 627         fprintf( stderr, "** Response Queue:\n" );
 628         if (( lm = ld->ld_responses ) == NULL ) {
 629                 fprintf( stderr, "   Empty\n" );
 630         }
 631         for ( ; lm != NULL; lm = lm->lm_next ) {
 632                 fprintf( stderr, " * msgid %d,  type %lu\n",
 633                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 634                 if (( l = lm->lm_chain ) != NULL ) {
 635                         fprintf( stderr, "   chained responses:\n" );
 636                         for ( ; l != NULL; l = l->lm_chain ) {
 637                                 fprintf( stderr,
 638                                     "  * msgid %d,  type %lu\n",
 639                                     l->lm_msgid,
 640                                     (unsigned long) l->lm_msgtype );
 641                         }
 642                 }
 643         }
 644 }
 645 #endif /* LDAP_DEBUG */
 646
 647 static void
 648 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 649 {
 650         if ( lr->lr_prev == NULL ) {
 651                 /* free'ing the first request? */
 652                 assert( ld->ld_requests == lr );
 653                 ld->ld_requests = lr->lr_next;
 654
 655         } else {
 656                 lr->lr_prev->lr_next = lr->lr_next;
 657         }
 658
 659         if ( lr->lr_next != NULL ) {
 660                 lr->lr_next->lr_prev = lr->lr_prev;
 661         }
 662
 663         if ( lr->lr_ber != NULL ) {
 664                 ber_free( lr->lr_ber, 1 );
 665         }
 666
 667         if ( lr->lr_res_error != NULL ) {
 668                 LDAP_FREE( lr->lr_res_error );
 669         }
 670
 671         if ( lr->lr_res_matched != NULL ) {
 672                 LDAP_FREE( lr->lr_res_matched );
 673         }
 674
 675         LDAP_FREE( lr );
 676 }
 677
 678 void
 679 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 680 {
 681         LDAPRequest     **ttmplr;
 682
 683         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 684                 lr->lr_origid, lr->lr_msgid, 0 );
 685
 686         /* free all referrals (child requests) */
 687         while ( lr->lr_child )
 688                 ldap_free_request( ld, lr->lr_child );
 689
 690         if ( lr->lr_parent != NULL ) {
 691                 --lr->lr_parent->lr_outrefcnt;
 692                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 693                 if ( *ttmplr == lr )
 694                         *ttmplr = lr->lr_refnext;
 695         }
 696         ldap_free_request_int( ld, lr );
 697 }
 698
 699 /*
 700  * call first time with *cntp = -1
 701  * when returns *cntp == -1, no referrals are left
 702  *
 703  * NOTE: may replace *refsp, or shuffle the contents
 704  * of the original array.
 705  */
 706 static int ldap_int_nextref(
 707         LDAP                    *ld,
 708         char                    ***refsp,
 709         int                     *cntp,
 710         void                    *params )
 711 {
 712         assert( refsp != NULL );
 713         assert( *refsp != NULL );
 714         assert( cntp != NULL );
 715
 716         if ( *cntp < -1 ) {
 717                 *cntp = -1;
 718                 return -1;
 719         }
 720
 721         (*cntp)++;
 722
 723         if ( (*refsp)[ *cntp ] == NULL ) {
 724                 *cntp = -1;
 725         }
 726
 727         return 0;
 728 }
 729
 730 /*
 731  * Chase v3 referrals
 732  *
 733  * Parameters:
 734  *  (IN) ld = LDAP connection handle
 735  *  (IN) lr = LDAP Request structure
 736  *  (IN) refs = array of pointers to referral strings that we will chase
 737  *              The array will be free'd by this function when no longer needed
 738  *  (IN) sref != 0 if following search reference
 739  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 740  *  (OUT) hadrefp = 1 if sucessfully followed referral
 741  *
 742  * Return value - number of referrals followed
 743  */
 744 int
 745 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 746 {
 747         char            *unfollowed;
 748         int              unfollowedcnt = 0;
 749         LDAPRequest     *origreq;
 750         LDAPURLDesc     *srv = NULL;
 751         BerElement      *ber;
 752         char            **refarray = NULL;
 753         LDAPConn        *lc;
 754         int                      rc, count, i, j, id;
 755         LDAPreqinfo  rinfo;
 756
 757         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 758         *hadrefp = 0;
 759
 760         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 761
 762         unfollowed = NULL;
 763         rc = count = 0;
 764
 765         /* If no referrals in array, return */
 766         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 767                 rc = 0;
 768                 goto done;
 769         }
 770
 771         /* Check for hop limit exceeded */
 772         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 773                 Debug( LDAP_DEBUG_ANY,
 774                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 775                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 776             rc = -1;
 777                 goto done;
 778         }
 779
 780         /* find original request */
 781         for ( origreq = lr;
 782                 origreq->lr_parent != NULL;
 783                 origreq = origreq->lr_parent )
 784         {
 785                 /* empty */ ;
 786         }
 787
 788         refarray = refs;
 789         refs = NULL;
 790
 791         if ( ld->ld_nextref_proc == NULL ) {
 792                 ld->ld_nextref_proc = ldap_int_nextref;
 793         }
 794
 795         /* parse out & follow referrals */
 796         i = -1;
 797         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 798                         i != -1;
 799                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 800         {
 801
 802                 /* Parse the referral URL */
 803                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 804                         ld->ld_errno = rc;
 805                         rc = -1;
 806                         goto done;
 807                 }
 808
 809                 if( srv->lud_crit_exts ) {
 810                         /* we do not support any extensions */
 811                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 812                         rc = -1;
 813                         goto done;
 814                 }
 815
 816                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 817                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 818                         LDAP_FREE( srv->lud_dn );
 819                         srv->lud_dn = NULL;
 820                 }
 821
 822                 /* check connection for re-bind in progress */
 823                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 824                         if( lc->lconn_rebind_inprogress) {
 825                                 /* We are already chasing a referral or search reference and a
 826                                  * bind on that connection is in progress.  We must queue
 827                                  * referrals on that connection, so we don't get a request
 828                                  * going out before the bind operation completes. This happens
 829                                  * if two search references come in one behind the other
 830                                  * for the same server with different contexts.
 831                                  */
 832                                 Debug( LDAP_DEBUG_TRACE,
 833                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 834                                         refarray[i], 0, 0);
 835                                 if( lc->lconn_rebind_queue == NULL ) {
 836                                         /* Create a referral list */
 837                                         lc->lconn_rebind_queue =
 838                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 839
 840                                         if( lc->lconn_rebind_queue == NULL) {
 841                                                 ld->ld_errno = LDAP_NO_MEMORY;
 842                                                 rc = -1;
 843                                                 goto done;
 844                                         }
 845
 846                                         lc->lconn_rebind_queue[0] = refarray;
 847                                         lc->lconn_rebind_queue[1] = NULL;
 848                                         refarray = NULL;
 849
 850                                 } else {
 851                                         /* Count how many referral arrays we already have */
 852                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 853                                                 /* empty */;
 854                                         }
 855
 856                                         /* Add the new referral to the list */
 857                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 858                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 859
 860                                         if( lc->lconn_rebind_queue == NULL ) {
 861                                                 ld->ld_errno = LDAP_NO_MEMORY;
 862                                                 rc = -1;
 863                                                 goto done;
 864                                         }
 865                                         lc->lconn_rebind_queue[j] = refarray;
 866                                         lc->lconn_rebind_queue[j+1] = NULL;
 867                                         refarray = NULL;
 868                                 }
 869
 870                                 /* We have queued the referral/reference, now just return */
 871                                 rc = 0;
 872                                 *hadrefp = 1;
 873                                 count = 1; /* Pretend we already followed referral */
 874                                 goto done;
 875                         }
 876                 }
 877                 /* Re-encode the request with the new starting point of the search.
 878                  * Note: In the future we also need to replace the filter if one
 879                  * was provided with the search reference
 880                  */
 881
 882                 /* For references we don't want old dn if new dn empty */
 883                 if ( sref && srv->lud_dn == NULL ) {
 884                         srv->lud_dn = LDAP_STRDUP( "" );
 885                 }
 886
 887                 LDAP_NEXT_MSGID( ld, id );
 888                 ber = re_encode_request( ld, origreq->lr_ber, id,
 889                         sref, srv, &rinfo.ri_request );
 890
 891                 if( ber == NULL ) {
 892                         ld->ld_errno = LDAP_ENCODING_ERROR;
 893                         rc = -1;
 894                         goto done;
 895                 }
 896
 897                 Debug( LDAP_DEBUG_TRACE,
 898                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 899                         lr->lr_msgid, refarray[i], 0);
 900
 901                 /* Send the new request to the server - may require a bind */
 902                 rinfo.ri_msgid = origreq->lr_origid;
 903                 rinfo.ri_url = refarray[i];
 904 #ifdef LDAP_R_COMPILE
 905                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 906 #endif
 907                 rc = ldap_send_server_request( ld, ber, id,
 908                         origreq, srv, NULL, &rinfo );
 909 #ifdef LDAP_R_COMPILE
 910                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 911 #endif
 912                 if ( rc < 0 ) {
 913                         /* Failure, try next referral in the list */
 914                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
 915                                 refarray[i], ldap_err2string( ld->ld_errno ), 0);
 916                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
 917                         ldap_free_urllist(srv);
 918                         srv = NULL;
 919                 } else {
 920                         /* Success, no need to try this referral list further */
 921                         rc = 0;
 922                         ++count;
 923                         *hadrefp = 1;
 924
 925                         /* check if there is a queue of referrals that came in during bind */
 926                         if( lc == NULL) {
 927                                 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
 928                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 929                                         rc = -1;
 930                                         goto done;
 931                                 }
 932                         }
 933
 934                         if( lc->lconn_rebind_queue != NULL) {
 935                                 /* Release resources of previous list */
 936                                 LDAP_VFREE(refarray);
 937                                 refarray = NULL;
 938                                 ldap_free_urllist(srv);
 939                                 srv = NULL;
 940
 941                                 /* Pull entries off end of queue so list always null terminated */
 942                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 943                                         ;
 944                                 }
 945                                 refarray = lc->lconn_rebind_queue[j-1];
 946                                 lc->lconn_rebind_queue[j-1] = NULL;
 947                                 /* we pulled off last entry from queue, free queue */
 948                                 if ( j == 1 ) {
 949                                         LDAP_FREE( lc->lconn_rebind_queue);
 950                                         lc->lconn_rebind_queue = NULL;
 951                                 }
 952                                 /* restart the loop the with new referral list */
 953                                 i = -1;
 954                                 continue;
 955                         }
 956                         break; /* referral followed, break out of for loop */
 957                 }
 958         } /* end for loop */
 959 done:
 960         LDAP_VFREE( refarray );
 961         ldap_free_urllist( srv );
 962         LDAP_FREE( *errstrp );
 963
 964         if( rc == 0 ) {
 965                 *errstrp = NULL;
 966                 LDAP_FREE( unfollowed );
 967                 return count;
 968         } else {
 969                 ld->ld_errno = LDAP_REFERRAL;
 970                 *errstrp = unfollowed;
 971                 return rc;
 972         }
 973 }
 974
 975 /*
 976  * XXX merging of errors in this routine needs to be improved
 977  */
 978 int
 979 ldap_chase_referrals( LDAP *ld,
 980         LDAPRequest *lr,
 981         char **errstrp,
 982         int sref,
 983         int *hadrefp )
 984 {
 985         int             rc, count, id;
 986         unsigned        len;
 987         char            *p, *ref, *unfollowed;
 988         LDAPRequest     *origreq;
 989         LDAPURLDesc     *srv;
 990         BerElement      *ber;
 991         LDAPreqinfo  rinfo;
 992
 993         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 994
 995         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 996         *hadrefp = 0;
 997
 998         if ( *errstrp == NULL ) {
 999                 return( 0 );
1000         }
1001
1002         len = strlen( *errstrp );
1003         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1004                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1005                         *p = '\0';
1006                         p += LDAP_REF_STR_LEN;
1007                         break;
1008                 }
1009         }
1010
1011         if ( len < LDAP_REF_STR_LEN ) {
1012                 return( 0 );
1013         }
1014
1015         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1016                 Debug( LDAP_DEBUG_ANY,
1017                     "more than %d referral hops (dropping)\n",
1018                     ld->ld_refhoplimit, 0, 0 );
1019                     /* XXX report as error in ld->ld_errno? */
1020                     return( 0 );
1021         }
1022
1023         /* find original request */
1024         for ( origreq = lr; origreq->lr_parent != NULL;
1025              origreq = origreq->lr_parent ) {
1026                 /* empty */;
1027         }
1028
1029         unfollowed = NULL;
1030         rc = count = 0;
1031
1032         /* parse out & follow referrals */
1033         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1034                 if (( p = strchr( ref, '\n' )) != NULL ) {
1035                         *p++ = '\0';
1036                 } else {
1037                         p = NULL;
1038                 }
1039
1040                 rc = ldap_url_parse_ext( ref, &srv );
1041
1042                 if ( rc != LDAP_URL_SUCCESS ) {
1043                         Debug( LDAP_DEBUG_TRACE,
1044                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
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                 Debug( LDAP_DEBUG_TRACE,
1056                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1057
1058                 *hadrefp = 1;
1059
1060                 LDAP_NEXT_MSGID( ld, id );
1061                 ber = re_encode_request( ld, origreq->lr_ber,
1062                     id, sref, srv, &rinfo.ri_request );
1063
1064                 if( ber == NULL ) {
1065                         return -1 ;
1066                 }
1067
1068                 /* copy the complete referral for rebind process */
1069                 rinfo.ri_url = LDAP_STRDUP( ref );
1070
1071                 rinfo.ri_msgid = origreq->lr_origid;
1072
1073 #ifdef LDAP_R_COMPILE
1074                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1075 #endif
1076                 rc = ldap_send_server_request( ld, ber, id,
1077                         lr, srv, NULL, &rinfo );
1078 #ifdef LDAP_R_COMPILE
1079                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1080 #endif
1081
1082                 LDAP_FREE( rinfo.ri_url );
1083
1084                 if( rc >= 0 ) {
1085                         ++count;
1086                 } else {
1087                         Debug( LDAP_DEBUG_ANY,
1088                             "Unable to chase referral (%s)\n",
1089                             ldap_err2string( ld->ld_errno ), 0, 0 );
1090                         rc = ldap_append_referral( ld, &unfollowed, ref );
1091                 }
1092
1093                 ldap_free_urllist(srv);
1094         }
1095
1096         LDAP_FREE( *errstrp );
1097         *errstrp = unfollowed;
1098
1099         return(( rc == 0 ) ? count : rc );
1100 }
1101
1102
1103 int
1104 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1105 {
1106         int     first;
1107
1108         if ( *referralsp == NULL ) {
1109                 first = 1;
1110                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1111                     + 1 );
1112         } else {
1113                 first = 0;
1114                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1115                     strlen( *referralsp ) + strlen( s ) + 2 );
1116         }
1117
1118         if ( *referralsp == NULL ) {
1119                 ld->ld_errno = LDAP_NO_MEMORY;
1120                 return( -1 );
1121         }
1122
1123         if ( first ) {
1124                 strcpy( *referralsp, LDAP_REF_STR );
1125         } else {
1126                 strcat( *referralsp, "\n" );
1127         }
1128         strcat( *referralsp, s );
1129
1130         return( 0 );
1131 }
1132
1133
1134
1135 static BerElement *
1136 re_encode_request( LDAP *ld,
1137         BerElement *origber,
1138         ber_int_t msgid,
1139         int sref,
1140         LDAPURLDesc *srv,
1141         int *type )
1142 {
1143         /*
1144          * XXX this routine knows way too much about how the lber library works!
1145          */
1146         ber_int_t       along;
1147         ber_tag_t       tag;
1148         ber_tag_t       rtag;
1149         ber_int_t       ver;
1150         ber_int_t       scope;
1151         int             rc;
1152         BerElement      tmpber, *ber;
1153         char            *orig_dn;
1154         char            *dn;
1155
1156         Debug( LDAP_DEBUG_TRACE,
1157             "re_encode_request: new msgid %ld, new dn <%s>\n",
1158             (long) msgid,
1159                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1160
1161         tmpber = *origber;
1162
1163         /*
1164          * all LDAP requests are sequences that start with a message id.
1165          * For all except delete, this is followed by a sequence that is
1166          * tagged with the operation code.  For delete, the provided DN
1167          * is not wrapped by a sequence.
1168          */
1169         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1170
1171         if ( rtag == LBER_ERROR ) {
1172                 ld->ld_errno = LDAP_DECODING_ERROR;
1173                 return( NULL );
1174         }
1175
1176         assert( tag != 0);
1177         if ( tag == LDAP_REQ_BIND ) {
1178                 /* bind requests have a version number before the DN & other stuff */
1179                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1180
1181         } else if ( tag == LDAP_REQ_DELETE ) {
1182                 /* delete requests don't have a DN wrapping sequence */
1183                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1184
1185         } else if ( tag == LDAP_REQ_SEARCH ) {
1186                 /* search requests need to be re-scope-ed */
1187                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1188
1189                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1190                         /* use the scope provided in reference */
1191                         scope = srv->lud_scope;
1192
1193                 } else if ( sref ) {
1194                         /* use scope implied by previous operation
1195                          *   base -> base
1196                          *   one -> base
1197                          *   subtree -> subtree
1198                          *   subordinate -> subtree
1199                          */
1200                         switch( scope ) {
1201                         default:
1202                         case LDAP_SCOPE_BASE:
1203                         case LDAP_SCOPE_ONELEVEL:
1204                                 scope = LDAP_SCOPE_BASE;
1205                                 break;
1206                         case LDAP_SCOPE_SUBTREE:
1207 #ifdef LDAP_SCOPE_SUBORDINATE
1208                         case LDAP_SCOPE_SUBORDINATE:
1209 #endif
1210                                 scope = LDAP_SCOPE_SUBTREE;
1211                                 break;
1212                         }
1213                 }
1214
1215         } else {
1216                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1217         }
1218
1219         if( rtag == LBER_ERROR ) {
1220                 ld->ld_errno = LDAP_DECODING_ERROR;
1221                 return NULL;
1222         }
1223
1224         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1225                 return NULL;
1226         }
1227
1228         if ( srv->lud_dn == NULL ) {
1229                 dn = orig_dn;
1230         } else {
1231                 dn = srv->lud_dn;
1232         }
1233
1234         if ( tag == LDAP_REQ_BIND ) {
1235                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1236         } else if ( tag == LDAP_REQ_DELETE ) {
1237                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1238         } else if ( tag == LDAP_REQ_SEARCH ) {
1239                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1240         } else {
1241                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1242         }
1243
1244         LDAP_FREE( orig_dn );
1245
1246         if ( rc == -1 ) {
1247                 ld->ld_errno = LDAP_ENCODING_ERROR;
1248                 ber_free( ber, 1 );
1249                 return NULL;
1250         }
1251
1252         if ( tag != LDAP_REQ_DELETE && (
1253                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1254                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1255             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1256         {
1257                 ld->ld_errno = LDAP_ENCODING_ERROR;
1258                 ber_free( ber, 1 );
1259                 return NULL;
1260         }
1261
1262 #ifdef LDAP_DEBUG
1263         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1264                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1265                     0, 0, 0 );
1266                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1267         }
1268 #endif /* LDAP_DEBUG */
1269
1270         *type = tag;    /* return request type */
1271         return ber;
1272 }
1273
1274
1275 LDAPRequest *
1276 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1277 {
1278         LDAPRequest     *lr;
1279
1280 #ifdef LDAP_R_COMPILE
1281         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1282 #endif
1283         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1284                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1285                         continue;       /* Skip completed requests */
1286                 }
1287                 if ( msgid == lr->lr_msgid ) {
1288                         break;
1289                 }
1290         }
1291 #ifdef LDAP_R_COMPILE
1292         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1293 #endif
1294
1295         return( lr );
1296 }
1297
1298