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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2004 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  */
  18 /* This notice applies to changes, created by or for Novell, Inc.,
  19  * to preexisting works for which notices appear elsewhere in this file.
  20  *
  21  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  22  *
  23  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  24  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  25  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  26  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  27  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  28  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  29  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  30  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  31  *---
  32  * Modification to OpenLDAP source by Novell, Inc.
  33  * April 2000 sfs  Added code to chase V3 referrals
  34  *  request.c - sending of ldap requests; handling of referrals
  35  *---
  36  * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
  37  * can be found in the file "build/LICENSE-2.0.1" in this distribution
  38  * of OpenLDAP Software.
  39  */
  40
  41 #include "portable.h"
  42
  43 #include <stdio.h>
  44
  45 #include <ac/stdlib.h>
  46
  47 #include <ac/errno.h>
  48 #include <ac/socket.h>
  49 #include <ac/string.h>
  50 #include <ac/time.h>
  51 #include <ac/unistd.h>
  52
  53 #include "ldap-int.h"
  54 #include "lber.h"
  55
  56 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
  57 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
  58
  59 static BerElement *
  60 re_encode_request( LDAP *ld,
  61         BerElement *origber,
  62         ber_int_t msgid,
  63         int sref,
  64         LDAPURLDesc *srv,
  65         int *type );
  66
  67 BerElement *
  68 ldap_alloc_ber_with_options( LDAP *ld )
  69 {
  70         BerElement      *ber;
  71
  72     if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
  73                 ld->ld_errno = LDAP_NO_MEMORY;
  74         }
  75
  76         return( ber );
  77 }
  78
  79
  80 void
  81 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  82 {
  83         ber->ber_options = ld->ld_lberoptions;
  84 }
  85
  86
  87 ber_int_t
  88 ldap_send_initial_request(
  89         LDAP *ld,
  90         ber_tag_t msgtype,
  91         const char *dn,
  92         BerElement *ber,
  93         ber_int_t msgid)
  94 {
  95         LDAPURLDesc     *servers;
  96         int rc;
  97
  98 #ifdef NEW_LOGGING
  99         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_initial_request\n", 0, 0, 0 );
 100 #else
 101         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
 102 #endif
 103
 104         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 105                 /* not connected yet */
 106                 int rc = ldap_open_defconn( ld );
 107
 108                 if( rc < 0 ) {
 109                         ber_free( ber, 1 );
 110                         return( -1 );
 111                 }
 112
 113 #ifdef NEW_LOGGING
 114                 LDAP_LOG ( OPERATION, DETAIL1,
 115                         "ldap_send_initial_request: ldap_open_defconn: successful\n" ,
 116                         0, 0, 0);
 117 #else
 118                 Debug( LDAP_DEBUG_TRACE,
 119                         "ldap_open_defconn: successful\n",
 120                         0, 0, 0 );
 121 #endif
 122         }
 123
 124         {
 125                 /*
 126                  * use of DNS is turned off or this is an X.500 DN...
 127                  * use our default connection
 128                  */
 129                 servers = NULL;
 130         }
 131
 132 #ifdef LDAP_CONNECTIONLESS
 133         if (LDAP_IS_UDP(ld)) {
 134                 if (msgtype == LDAP_REQ_BIND) {
 135                         if (ld->ld_options.ldo_cldapdn)
 136                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 137                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 138                         return 0;
 139                 }
 140                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 141                         return LDAP_PARAM_ERROR;
 142         }
 143 #endif
 144 #ifdef LDAP_R_COMPILE
 145         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 146 #endif
 147         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 148                                                                         servers, NULL, NULL );
 149 #ifdef LDAP_R_COMPILE
 150         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 151 #endif
 152         if (servers)
 153                 ldap_free_urllist(servers);
 154         return(rc);
 155 }
 156
 157
 158 int
 159 ldap_int_flush_request(
 160         LDAP *ld,
 161         LDAPRequest *lr
 162 )
 163 {
 164         LDAPConn *lc = lr->lr_conn;
 165
 166         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 167                 if ( errno == EAGAIN ) {
 168                         /* need to continue write later */
 169                         lr->lr_status = LDAP_REQST_WRITING;
 170                         ldap_mark_select_write( ld, lc->lconn_sb );
 171                         ld->ld_errno = LDAP_BUSY;
 172                         return -2;
 173                 } else {
 174                         ld->ld_errno = LDAP_SERVER_DOWN;
 175                         ldap_free_request( ld, lr );
 176                         ldap_free_connection( ld, lc, 0, 0 );
 177                         return( -1 );
 178                 }
 179         } else {
 180                 if ( lr->lr_parent == NULL ) {
 181                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 182                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 183                 }
 184                 lr->lr_status = LDAP_REQST_INPROGRESS;
 185
 186                 /* sent -- waiting for a response */
 187                 ldap_mark_select_read( ld, lc->lconn_sb );
 188         }
 189         return 0;
 190 }
 191
 192 int
 193 ldap_send_server_request(
 194         LDAP *ld,
 195         BerElement *ber,
 196         ber_int_t msgid,
 197         LDAPRequest *parentreq,
 198         LDAPURLDesc *srvlist,
 199         LDAPConn *lc,
 200         LDAPreqinfo *bind )
 201 {
 202         LDAPRequest     *lr;
 203         int incparent, rc;
 204
 205 #ifdef NEW_LOGGING
 206         LDAP_LOG ( OPERATION, ENTRY, "ldap_send_server_request\n", 0, 0, 0 );
 207 #else
 208         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 209 #endif
 210
 211         incparent = 0;
 212         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 213
 214         if ( lc == NULL ) {
 215                 if ( srvlist == NULL ) {
 216                         lc = ld->ld_defconn;
 217                 } else {
 218                         if (( lc = find_connection( ld, srvlist, 1 )) ==
 219                             NULL ) {
 220                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 221                                         /* Remember the bind in the parent */
 222                                         incparent = 1;
 223                                         ++parentreq->lr_outrefcnt;
 224                                 }
 225                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 226                         }
 227                 }
 228         }
 229
 230         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 231                 ber_free( ber, 1 );
 232                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 233                         ld->ld_errno = LDAP_SERVER_DOWN;
 234                 }
 235                 if ( incparent ) {
 236                         /* Forget about the bind */
 237                         --parentreq->lr_outrefcnt;
 238                 }
 239                 return( -1 );
 240         }
 241
 242         use_connection( ld, lc );
 243
 244         /* If we still have an incomplete write, try to finish it before
 245          * dealing with the new request. If we don't finish here, return
 246          * LDAP_BUSY and let the caller retry later. We only allow a single
 247          * request to be in WRITING state.
 248          */
 249         rc = 0;
 250         if ( ld->ld_requests &&
 251                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 252                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 ) {
 253                 rc = -1;
 254         }
 255         if ( rc ) return rc;
 256
 257         if (( lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ))) ==
 258             NULL ) {
 259                 ld->ld_errno = LDAP_NO_MEMORY;
 260                 ldap_free_connection( ld, lc, 0, 0 );
 261                 ber_free( ber, 1 );
 262                 if ( incparent ) {
 263                         /* Forget about the bind */
 264                         --parentreq->lr_outrefcnt;
 265                 }
 266                 return( -1 );
 267         }
 268         lr->lr_msgid = msgid;
 269         lr->lr_status = LDAP_REQST_INPROGRESS;
 270         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 271         lr->lr_ber = ber;
 272         lr->lr_conn = lc;
 273         if ( parentreq != NULL ) {      /* sub-request */
 274                 if ( !incparent ) {
 275                         /* Increment if we didn't do it before the bind */
 276                         ++parentreq->lr_outrefcnt;
 277                 }
 278                 lr->lr_origid = parentreq->lr_origid;
 279                 lr->lr_parentcnt = parentreq->lr_parentcnt + 1;
 280                 lr->lr_parent = parentreq;
 281                 lr->lr_refnext = parentreq->lr_child;
 282                 parentreq->lr_child = lr;
 283         } else {                        /* original request */
 284                 lr->lr_origid = lr->lr_msgid;
 285         }
 286
 287         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 288                 lr->lr_next->lr_prev = lr;
 289         }
 290         ld->ld_requests = lr;
 291         lr->lr_prev = NULL;
 292
 293         ld->ld_errno = LDAP_SUCCESS;
 294         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 295                 msgid = -1;
 296         }
 297
 298         return( msgid );
 299 }
 300
 301 LDAPConn *
 302 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 303         int connect, LDAPreqinfo *bind )
 304 {
 305         LDAPConn        *lc;
 306         LDAPURLDesc     *srv;
 307         Sockbuf         *sb = NULL;
 308
 309 #ifdef NEW_LOGGING
 310         LDAP_LOG ( OPERATION, ENTRY, "ldap_new_connection\n", 0, 0, 0 );
 311 #else
 312         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection\n", 0, 0, 0 );
 313 #endif
 314         /*
 315          * make a new LDAP server connection
 316          * XXX open connection synchronously for now
 317          */
 318         if (( lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ))) == NULL ||
 319             ( !use_ldsb && ( (sb = ber_sockbuf_alloc()) == NULL ))) {
 320                 if ( lc != NULL ) {
 321                         LDAP_FREE( (char *)lc );
 322                 }
 323                 ld->ld_errno = LDAP_NO_MEMORY;
 324                 return( NULL );
 325         }
 326
 327         lc->lconn_sb = ( use_ldsb ) ? ld->ld_sb : sb;
 328
 329         if ( connect ) {
 330                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 331                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 ) {
 332                                 break;
 333                         }
 334                 }
 335
 336                 if ( srv == NULL ) {
 337                         if ( !use_ldsb ) {
 338                                 ber_sockbuf_free( lc->lconn_sb );
 339                         }
 340                     LDAP_FREE( (char *)lc );
 341                     ld->ld_errno = LDAP_SERVER_DOWN;
 342                     return( NULL );
 343                 }
 344
 345                 lc->lconn_server = ldap_url_dup(srv);
 346         }
 347
 348         lc->lconn_status = LDAP_CONNST_CONNECTED;
 349         lc->lconn_next = ld->ld_conns;
 350         ld->ld_conns = lc;
 351
 352         /*
 353          * XXX for now, we always do a synchronous bind.  This will have
 354          * to change in the long run...
 355          */
 356         if ( bind != NULL) {
 357                 int             err = 0;
 358                 LDAPConn        *savedefconn;
 359
 360                 /* Set flag to prevent additional referrals from being processed on this
 361                  * connection until the bind has completed
 362                  */
 363                 lc->lconn_rebind_inprogress = 1;
 364                 /* V3 rebind function */
 365                 if ( ld->ld_rebind_proc != NULL) {
 366                         LDAPURLDesc     *srvfunc;
 367                         if( ( srvfunc = ldap_url_dup( srvlist)) == NULL) {
 368                                 ld->ld_errno = LDAP_NO_MEMORY;
 369                                 err = -1;
 370                         } else {
 371                                 savedefconn = ld->ld_defconn;
 372                                 ++lc->lconn_refcnt;     /* avoid premature free */
 373                                 ld->ld_defconn = lc;
 374
 375 #ifdef NEW_LOGGING
 376                                 LDAP_LOG ( OPERATION, DETAIL1,
 377                                         "ldap_new_connection: Call application rebind_proc\n",
 378                                         0, 0, 0 );
 379 #else
 380                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 381 #endif
 382 #ifdef LDAP_R_COMPILE
 383                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 384                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 385 #endif
 386                                 err = (*ld->ld_rebind_proc)( ld,
 387                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 388                                         ld->ld_rebind_params );
 389 #ifdef LDAP_R_COMPILE
 390                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 391                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 392 #endif
 393
 394                                 ld->ld_defconn = savedefconn;
 395                                 --lc->lconn_refcnt;
 396
 397                                 if( err != 0) {
 398                                 err = -1;
 399                                         ldap_free_connection( ld, lc, 1, 0 );
 400                                         lc = NULL;
 401                         }
 402                                 ldap_free_urldesc( srvfunc);
 403                 }
 404                 } else {
 405                         savedefconn = ld->ld_defconn;
 406                         ++lc->lconn_refcnt;     /* avoid premature free */
 407                         ld->ld_defconn = lc;
 408
 409 #ifdef NEW_LOGGING
 410                         LDAP_LOG ( OPERATION, DETAIL1,
 411                                 "ldap_new_connection: anonymous rebind via ldap_bind_s\n",
 412                                 0, 0, 0 );
 413 #else
 414                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 415 #endif
 416 #ifdef LDAP_R_COMPILE
 417                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 418                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 419 #endif
 420                         if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
 421                                 err = -1;
 422                         }
 423 #ifdef LDAP_R_COMPILE
 424                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 425                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 426 #endif
 427                         ld->ld_defconn = savedefconn;
 428                         --lc->lconn_refcnt;
 429
 430                 if ( err != 0 ) {
 431                         ldap_free_connection( ld, lc, 1, 0 );
 432                         lc = NULL;
 433                 }
 434         }
 435                 if( lc != NULL)
 436                         lc->lconn_rebind_inprogress = 0;
 437         }
 438
 439         return( lc );
 440 }
 441
 442
 443 static LDAPConn *
 444 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 445 /*
 446  * return an existing connection (if any) to the server srv
 447  * if "any" is non-zero, check for any server in the "srv" chain
 448  */
 449 {
 450         LDAPConn        *lc;
 451         LDAPURLDesc     *ls;
 452
 453         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 454                 for ( ls = srv; ls != NULL; ls = ls->lud_next ) {
 455                         if ( lc->lconn_server->lud_host != NULL &&
 456                                 *lc->lconn_server->lud_host != '\0' &&
 457                             ls->lud_host != NULL && *ls->lud_host != '\0' &&
 458                                 strcasecmp( ls->lud_host, lc->lconn_server->lud_host ) == 0
 459                             && ls->lud_port == lc->lconn_server->lud_port ) {
 460                                 return lc;
 461                         }
 462                         if ( !any ) {
 463                                 break;
 464                         }
 465                 }
 466         }
 467
 468         return NULL;
 469 }
 470
 471
 472
 473 static void
 474 use_connection( LDAP *ld, LDAPConn *lc )
 475 {
 476         ++lc->lconn_refcnt;
 477         lc->lconn_lastused = time( NULL );
 478 }
 479
 480
 481 void
 482 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 483 {
 484         LDAPConn        *tmplc, *prevlc;
 485
 486 #ifdef NEW_LOGGING
 487         LDAP_LOG ( OPERATION, ENTRY, "ldap_free_connection\n", 0, 0, 0 );
 488 #else
 489         Debug( LDAP_DEBUG_TRACE, "ldap_free_connection\n", 0, 0, 0 );
 490 #endif
 491
 492         if ( force || --lc->lconn_refcnt <= 0 ) {
 493                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 494                         ldap_mark_select_clear( ld, lc->lconn_sb );
 495                         if ( unbind ) {
 496                                 ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
 497                         }
 498                 }
 499
 500                 if( lc->lconn_ber != NULL ) {
 501                         ber_free( lc->lconn_ber, 1 );
 502                 }
 503
 504                 ldap_int_sasl_close( ld, lc );
 505
 506                 prevlc = NULL;
 507                 for ( tmplc = ld->ld_conns; tmplc != NULL;
 508                     tmplc = tmplc->lconn_next ) {
 509                         if ( tmplc == lc ) {
 510                                 if ( prevlc == NULL ) {
 511                                     ld->ld_conns = tmplc->lconn_next;
 512                                 } else {
 513                                     prevlc->lconn_next = tmplc->lconn_next;
 514                                 }
 515                                 break;
 516                         }
 517                         prevlc = tmplc;
 518                 }
 519                 ldap_free_urllist( lc->lconn_server );
 520 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 521                 if ( lc->lconn_krbinstance != NULL ) {
 522                         LDAP_FREE( lc->lconn_krbinstance );
 523                 }
 524 #endif
 525                 if ( lc->lconn_sb != ld->ld_sb ) {
 526                         ber_sockbuf_free( lc->lconn_sb );
 527                 }
 528                 if( lc->lconn_rebind_queue != NULL) {
 529                         int i;
 530                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++) {
 531                                 LDAP_VFREE(lc->lconn_rebind_queue[i]);
 532                         }
 533                         LDAP_FREE( lc->lconn_rebind_queue);
 534                 }
 535                 LDAP_FREE( lc );
 536 #ifdef NEW_LOGGING
 537                 LDAP_LOG ( OPERATION, RESULTS,
 538                         "ldap_free_connection: actually freed\n", 0, 0, 0 );
 539 #else
 540                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
 541                     0, 0, 0 );
 542 #endif
 543         } else {
 544                 lc->lconn_lastused = time( NULL );
 545 #ifdef NEW_LOGGING
 546                 LDAP_LOG ( OPERATION, RESULTS, "ldap_free_connection: refcnt %d\n",
 547                         lc->lconn_refcnt, 0, 0 );
 548 #else
 549                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 550                     lc->lconn_refcnt, 0, 0 );
 551 #endif
 552         }
 553 }
 554
 555
 556 #ifdef LDAP_DEBUG
 557 void
 558 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 559 {
 560         LDAPConn        *lc;
 561         char            timebuf[32];
 562
 563         fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
 564         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 565                 if ( lc->lconn_server != NULL ) {
 566                         fprintf( stderr, "* host: %s  port: %d%s\n",
 567                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 568                             : lc->lconn_server->lud_host,
 569                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 570                             ld->ld_sb ) ? "  (default)" : "" );
 571                 }
 572                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 573                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 574                     "NeedSocket" : ( lc->lconn_status ==
 575                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 576                 fprintf( stderr, "  last used: %s",
 577                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 578                 if( lc->lconn_rebind_inprogress ) {
 579                         fprintf( stderr, "  rebind in progress\n");
 580                         if( lc->lconn_rebind_queue != NULL) {
 581                                 int i = 0;
 582                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 583                                         int j = 0;
 584                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 585                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 586                                                         i, j, lc->lconn_rebind_queue[i][j]);
 587                                         }
 588                                 }
 589                         } else {
 590                                 fprintf( stderr, "    queue is empty\n");
 591                         }
 592                 }
 593                 fprintf(stderr, "\n");
 594                 if ( !all ) {
 595                         break;
 596                 }
 597         }
 598 }
 599
 600
 601 void
 602 ldap_dump_requests_and_responses( LDAP *ld )
 603 {
 604         LDAPRequest     *lr;
 605         LDAPMessage     *lm, *l;
 606
 607 #ifdef LDAP_R_COMPILE
 608         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 609 #endif
 610         fprintf( stderr, "** Outstanding Requests:\n" );
 611         if (( lr = ld->ld_requests ) == NULL ) {
 612                 fprintf( stderr, "   Empty\n" );
 613         }
 614         for ( ; lr != NULL; lr = lr->lr_next ) {
 615             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 616                 lr->lr_msgid, lr->lr_origid,
 617                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 618                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 619                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 620                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 621                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
 622             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 623                     lr->lr_outrefcnt, lr->lr_parentcnt );
 624         }
 625 #ifdef LDAP_R_COMPILE
 626         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 627 #endif
 628         fprintf( stderr, "** Response Queue:\n" );
 629         if (( lm = ld->ld_responses ) == NULL ) {
 630                 fprintf( stderr, "   Empty\n" );
 631         }
 632         for ( ; lm != NULL; lm = lm->lm_next ) {
 633                 fprintf( stderr, " * msgid %d,  type %lu\n",
 634                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 635                 if (( l = lm->lm_chain ) != NULL ) {
 636                         fprintf( stderr, "   chained responses:\n" );
 637                         for ( ; l != NULL; l = l->lm_chain ) {
 638                                 fprintf( stderr,
 639                                     "  * msgid %d,  type %lu\n",
 640                                     l->lm_msgid,
 641                                     (unsigned long) l->lm_msgtype );
 642                         }
 643                 }
 644         }
 645 }
 646 #endif /* LDAP_DEBUG */
 647
 648 void
 649 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 650 {
 651         if ( lr->lr_prev == NULL ) {
 652                 ld->ld_requests = lr->lr_next;
 653         } else {
 654                 lr->lr_prev->lr_next = lr->lr_next;
 655         }
 656
 657         if ( lr->lr_next != NULL ) {
 658                 lr->lr_next->lr_prev = lr->lr_prev;
 659         }
 660
 661         if ( lr->lr_ber != NULL ) {
 662                 ber_free( lr->lr_ber, 1 );
 663         }
 664
 665         if ( lr->lr_res_error != NULL ) {
 666                 LDAP_FREE( lr->lr_res_error );
 667         }
 668
 669         if ( lr->lr_res_matched != NULL ) {
 670                 LDAP_FREE( lr->lr_res_matched );
 671         }
 672
 673         LDAP_FREE( lr );
 674 }
 675
 676 void
 677 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 678 {
 679         LDAPRequest     **ttmplr;
 680
 681 #ifdef NEW_LOGGING
 682         LDAP_LOG ( OPERATION, ARGS, "ldap_free_request (origid %d, msgid %d)\n",
 683                 lr->lr_origid, lr->lr_msgid, 0 );
 684 #else
 685         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 686                 lr->lr_origid, lr->lr_msgid, 0 );
 687 #endif
 688
 689         /* free all referrals (child requests) */
 690         while ( lr->lr_child )
 691                 ldap_free_request( ld, lr->lr_child );
 692
 693         if ( lr->lr_parent != NULL ) {
 694                 --lr->lr_parent->lr_outrefcnt;
 695                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 696                 if ( *ttmplr == lr )
 697                         *ttmplr = lr->lr_refnext;
 698         }
 699         ldap_free_request_int( ld, lr );
 700 }
 701
 702
 703 /*
 704  * Chase v3 referrals
 705  *
 706  * Parameters:
 707  *  (IN) ld = LDAP connection handle
 708  *  (IN) lr = LDAP Request structure
 709  *  (IN) refs = array of pointers to referral strings that we will chase
 710  *              The array will be free'd by this function when no longer needed
 711  *  (IN) sref != 0 if following search reference
 712  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 713  *  (OUT) hadrefp = 1 if sucessfully followed referral
 714  *
 715  * Return value - number of referrals followed
 716  */
 717 int
 718 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 719 {
 720         char            *unfollowed;
 721         int                      unfollowedcnt = 0;
 722         LDAPRequest     *origreq;
 723         LDAPURLDesc     *srv = NULL;
 724         BerElement      *ber;
 725         char            **refarray = NULL;
 726         LDAPConn        *lc;
 727         int                      rc, count, i, j, id;
 728         LDAPreqinfo  rinfo;
 729
 730         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 731         *hadrefp = 0;
 732
 733 #ifdef NEW_LOGGING
 734         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_v3referrals\n", 0, 0, 0 );
 735 #else
 736         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 737 #endif
 738
 739         unfollowed = NULL;
 740         rc = count = 0;
 741
 742         /* If no referrals in array, return */
 743         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 744                 rc = 0;
 745                 goto done;
 746         }
 747
 748         /* Check for hop limit exceeded */
 749         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 750 #ifdef NEW_LOGGING
 751                 LDAP_LOG ( OPERATION, DETAIL1,
 752                         "ldap_chase_v3referrals: more than %d referral hops (dropping)\n",
 753                         ld->ld_refhoplimit, 0, 0 );
 754 #else
 755                 Debug( LDAP_DEBUG_ANY,
 756                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 757 #endif
 758                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 759             rc = -1;
 760                 goto done;
 761         }
 762
 763         /* find original request */
 764         for ( origreq = lr;
 765                 origreq->lr_parent != NULL;
 766                 origreq = origreq->lr_parent )
 767         {
 768                 /* empty */ ;
 769         }
 770
 771         refarray = refs;
 772         refs = NULL;
 773         /* parse out & follow referrals */
 774         for( i=0; refarray[i] != NULL; i++) {
 775                 /* Parse the referral URL */
 776                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 777                         ld->ld_errno = rc;
 778                         rc = -1;
 779                         goto done;
 780                 }
 781
 782                 if( srv->lud_crit_exts ) {
 783                         /* we do not support any extensions */
 784                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 785                         rc = -1;
 786                         goto done;
 787                 }
 788
 789                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 790                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 791                         LDAP_FREE( srv->lud_dn );
 792                         srv->lud_dn = NULL;
 793                 }
 794
 795                 /* check connection for re-bind in progress */
 796                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 797                         if( lc->lconn_rebind_inprogress) {
 798                                 /* We are already chasing a referral or search reference and a
 799                                  * bind on that connection is in progress.  We must queue
 800                                  * referrals on that connection, so we don't get a request
 801                                  * going out before the bind operation completes. This happens
 802                                  * if two search references come in one behind the other
 803                                  * for the same server with different contexts.
 804                                  */
 805 #ifdef NEW_LOGGING
 806                                 LDAP_LOG ( OPERATION, DETAIL1,
 807                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 808                                         refarray[i], 0, 0 );
 809 #else
 810                                 Debug( LDAP_DEBUG_TRACE,
 811                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 812                                         refarray[i], 0, 0);
 813 #endif
 814                                 if( lc->lconn_rebind_queue == NULL ) {
 815                                         /* Create a referral list */
 816                                         lc->lconn_rebind_queue =
 817                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 818
 819                                         if( lc->lconn_rebind_queue == NULL) {
 820                                                 ld->ld_errno = LDAP_NO_MEMORY;
 821                                                 rc = -1;
 822                                                 goto done;
 823                                         }
 824
 825                                         lc->lconn_rebind_queue[0] = refarray;
 826                                         lc->lconn_rebind_queue[1] = NULL;
 827                                         refarray = NULL;
 828
 829                                 } else {
 830                                         /* Count how many referral arrays we already have */
 831                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 832                                                 /* empty */;
 833                                         }
 834
 835                                         /* Add the new referral to the list */
 836                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 837                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 838
 839                                         if( lc->lconn_rebind_queue == NULL ) {
 840                                                 ld->ld_errno = LDAP_NO_MEMORY;
 841                                                 rc = -1;
 842                                                 goto done;
 843                                         }
 844                                         lc->lconn_rebind_queue[j] = refarray;
 845                                         lc->lconn_rebind_queue[j+1] = NULL;
 846                                         refarray = NULL;
 847                                 }
 848
 849                                 /* We have queued the referral/reference, now just return */
 850                                 rc = 0;
 851                                 *hadrefp = 1;
 852                                 count = 1; /* Pretend we already followed referral */
 853                                 goto done;
 854                         }
 855                 }
 856                 /* Re-encode the request with the new starting point of the search.
 857                  * Note: In the future we also need to replace the filter if one
 858                  * was provided with the search reference
 859                  */
 860
 861                 /* For references we don't want old dn if new dn empty */
 862                 if ( sref && srv->lud_dn == NULL ) {
 863                         srv->lud_dn = LDAP_STRDUP( "" );
 864                 }
 865
 866                 LDAP_NEXT_MSGID( ld, id );
 867                 ber = re_encode_request( ld, origreq->lr_ber, id,
 868                         sref, srv, &rinfo.ri_request );
 869
 870                 if( ber == NULL ) {
 871                         ld->ld_errno = LDAP_ENCODING_ERROR;
 872                         rc = -1;
 873                         goto done;
 874                 }
 875
 876 #ifdef NEW_LOGGING
 877                 LDAP_LOG ( OPERATION, DETAIL1,
 878                         "ldap_chase_v3referrals: msgid %d, url \"%s\"\n",
 879                         lr->lr_msgid, refarray[i], 0 );
 880 #else
 881                 Debug( LDAP_DEBUG_TRACE,
 882                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 883                         lr->lr_msgid, refarray[i], 0);
 884 #endif
 885
 886                 /* Send the new request to the server - may require a bind */
 887                 rinfo.ri_msgid = origreq->lr_origid;
 888                 rinfo.ri_url = refarray[i];
 889 #ifdef LDAP_R_COMPILE
 890                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 891 #endif
 892                 rc = ldap_send_server_request( ld, ber, id,
 893                         origreq, srv, NULL, &rinfo );
 894 #ifdef LDAP_R_COMPILE
 895                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 896 #endif
 897                 if ( rc < 0 ) {
 898                         /* Failure, try next referral in the list */
 899 #ifdef NEW_LOGGING
 900                         LDAP_LOG ( OPERATION, ERR,
 901                         "ldap_chase_v3referrals: Unable to chase referral \"%s\" (%s)\n",
 902                         refarray[i], ldap_err2string( ld->ld_errno ), 0 );
 903 #else
 904                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
 905                                 refarray[i], ldap_err2string( ld->ld_errno ), 0);
 906 #endif
 907                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
 908                         ldap_free_urllist(srv);
 909                         srv = NULL;
 910                 } else {
 911                         /* Success, no need to try this referral list further */
 912                         rc = 0;
 913                         ++count;
 914                         *hadrefp = 1;
 915
 916                         /* check if there is a queue of referrals that came in during bind */
 917                         if( lc == NULL) {
 918                                 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
 919                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 920                                         rc = -1;
 921                                         goto done;
 922                                 }
 923                         }
 924
 925                         if( lc->lconn_rebind_queue != NULL) {
 926                                 /* Release resources of previous list */
 927                                 LDAP_VFREE(refarray);
 928                                 refarray = NULL;
 929                                 ldap_free_urllist(srv);
 930                                 srv = NULL;
 931
 932                                 /* Pull entries off end of queue so list always null terminated */
 933                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 934                                         ;
 935                                 }
 936                                 refarray = lc->lconn_rebind_queue[j-1];
 937                                 lc->lconn_rebind_queue[j-1] = NULL;
 938                                 /* we pulled off last entry from queue, free queue */
 939                                 if ( j == 1 ) {
 940                                         LDAP_FREE( lc->lconn_rebind_queue);
 941                                         lc->lconn_rebind_queue = NULL;
 942                                 }
 943                                 /* restart the loop the with new referral list */
 944                                 i = -1;
 945                                 continue;
 946                         }
 947                         break; /* referral followed, break out of for loop */
 948                 }
 949         } /* end for loop */
 950 done:
 951         LDAP_VFREE(refarray);
 952         ldap_free_urllist(srv);
 953         LDAP_FREE( *errstrp );
 954
 955         if( rc == 0) {
 956                 *errstrp = NULL;
 957                 LDAP_FREE( unfollowed );
 958                 return count;
 959         } else {
 960                 ld->ld_errno = LDAP_REFERRAL;
 961                 *errstrp = unfollowed;
 962                 return rc;
 963         }
 964 }
 965
 966 /*
 967  * XXX merging of errors in this routine needs to be improved
 968  */
 969 int
 970 ldap_chase_referrals( LDAP *ld,
 971         LDAPRequest *lr,
 972         char **errstrp,
 973         int sref,
 974         int *hadrefp )
 975 {
 976         int             rc, count, id;
 977         unsigned        len;
 978         char            *p, *ref, *unfollowed;
 979         LDAPRequest     *origreq;
 980         LDAPURLDesc     *srv;
 981         BerElement      *ber;
 982         LDAPreqinfo  rinfo;
 983
 984 #ifdef NEW_LOGGING
 985         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_referrals\n", 0, 0, 0 );
 986 #else
 987         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 988 #endif
 989
 990         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 991         *hadrefp = 0;
 992
 993         if ( *errstrp == NULL ) {
 994                 return( 0 );
 995         }
 996
 997         len = strlen( *errstrp );
 998         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
 999                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1000                         *p = '\0';
1001                         p += LDAP_REF_STR_LEN;
1002                         break;
1003                 }
1004         }
1005
1006         if ( len < LDAP_REF_STR_LEN ) {
1007                 return( 0 );
1008         }
1009
1010         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1011 #ifdef NEW_LOGGING
1012                 LDAP_LOG ( OPERATION, ENTRY,
1013                         "ldap_chase_referrals: more than %d referral hops (dropping)\n",
1014                         ld->ld_refhoplimit, 0, 0 );
1015 #else
1016                 Debug( LDAP_DEBUG_ANY,
1017                     "more than %d referral hops (dropping)\n",
1018                     ld->ld_refhoplimit, 0, 0 );
1019 #endif
1020                     /* XXX report as error in ld->ld_errno? */
1021                     return( 0 );
1022         }
1023
1024         /* find original request */
1025         for ( origreq = lr; origreq->lr_parent != NULL;
1026              origreq = origreq->lr_parent ) {
1027                 /* empty */;
1028         }
1029
1030         unfollowed = NULL;
1031         rc = count = 0;
1032
1033         /* parse out & follow referrals */
1034         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1035                 if (( p = strchr( ref, '\n' )) != NULL ) {
1036                         *p++ = '\0';
1037                 } else {
1038                         p = NULL;
1039                 }
1040
1041                 rc = ldap_url_parse_ext( ref, &srv );
1042
1043                 if ( rc != LDAP_URL_SUCCESS ) {
1044 #ifdef NEW_LOGGING
1045                         LDAP_LOG ( OPERATION, DETAIL1,
1046                                 "ldap_chase_referrals: ignoring unknown referral <%s>\n",
1047                                 ref, 0, 0 );
1048 #else
1049                         Debug( LDAP_DEBUG_TRACE,
1050                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1051 #endif
1052                         rc = ldap_append_referral( ld, &unfollowed, ref );
1053                         *hadrefp = 1;
1054                         continue;
1055                 }
1056
1057                 if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1058                         LDAP_FREE( srv->lud_dn );
1059                         srv->lud_dn = NULL;
1060                 }
1061
1062 #ifdef NEW_LOGGING
1063                 LDAP_LOG ( OPERATION, DETAIL1,
1064                         "ldap_chase_referrals: chasing LDAP referral <%s>\n", ref, 0, 0 );
1065 #else
1066                 Debug( LDAP_DEBUG_TRACE,
1067                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1068 #endif
1069
1070                 *hadrefp = 1;
1071
1072                 LDAP_NEXT_MSGID( ld, id );
1073                 ber = re_encode_request( ld, origreq->lr_ber,
1074                     id, sref, srv, &rinfo.ri_request );
1075
1076                 if( ber == NULL ) {
1077                         return -1 ;
1078                 }
1079
1080                 /* copy the complete referral for rebind process */
1081                 rinfo.ri_url = LDAP_STRDUP( ref );
1082
1083                 rinfo.ri_msgid = origreq->lr_origid;
1084
1085 #ifdef LDAP_R_COMPILE
1086         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1087 #endif
1088                 rc = ldap_send_server_request( ld, ber, id,
1089                     lr, srv, NULL, &rinfo );
1090 #ifdef LDAP_R_COMPILE
1091         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1092 #endif
1093
1094                 LDAP_FREE( rinfo.ri_url );
1095
1096                 if( rc >= 0 ) {
1097                         ++count;
1098                 } else {
1099 #ifdef NEW_LOGGING
1100                         LDAP_LOG ( OPERATION, ERR,
1101                                 "ldap_chase_referrals: Unable to chase referral <%s>\n",
1102                                 ldap_err2string( ld->ld_errno), 0, 0 );
1103 #else
1104                         Debug( LDAP_DEBUG_ANY,
1105                             "Unable to chase referral (%s)\n",
1106                             ldap_err2string( ld->ld_errno ), 0, 0 );
1107 #endif
1108                         rc = ldap_append_referral( ld, &unfollowed, ref );
1109                 }
1110
1111                 ldap_free_urllist(srv);
1112         }
1113
1114         LDAP_FREE( *errstrp );
1115         *errstrp = unfollowed;
1116
1117         return(( rc == 0 ) ? count : rc );
1118 }
1119
1120
1121 int
1122 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1123 {
1124         int     first;
1125
1126         if ( *referralsp == NULL ) {
1127                 first = 1;
1128                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1129                     + 1 );
1130         } else {
1131                 first = 0;
1132                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1133                     strlen( *referralsp ) + strlen( s ) + 2 );
1134         }
1135
1136         if ( *referralsp == NULL ) {
1137                 ld->ld_errno = LDAP_NO_MEMORY;
1138                 return( -1 );
1139         }
1140
1141         if ( first ) {
1142                 strcpy( *referralsp, LDAP_REF_STR );
1143         } else {
1144                 strcat( *referralsp, "\n" );
1145         }
1146         strcat( *referralsp, s );
1147
1148         return( 0 );
1149 }
1150
1151
1152
1153 static BerElement *
1154 re_encode_request( LDAP *ld,
1155         BerElement *origber,
1156         ber_int_t msgid,
1157         int sref,
1158         LDAPURLDesc *srv,
1159         int *type )
1160 {
1161         /*
1162          * XXX this routine knows way too much about how the lber library works!
1163          */
1164         ber_int_t       along;
1165         ber_tag_t       tag;
1166         ber_tag_t       rtag;
1167         ber_int_t       ver;
1168         ber_int_t       scope;
1169         int             rc;
1170         BerElement      tmpber, *ber;
1171         char            *orig_dn;
1172         char            *dn;
1173
1174 #ifdef NEW_LOGGING
1175         LDAP_LOG ( OPERATION, ARGS,
1176                 "re_encode_request: new msgid %ld, new dn <%s>\n",
1177                 (long) msgid,
1178                 ( srv == NULL || srv->lud_dn == NULL ) ? "NONE" : srv->lud_dn, 0 );
1179 #else
1180         Debug( LDAP_DEBUG_TRACE,
1181             "re_encode_request: new msgid %ld, new dn <%s>\n",
1182             (long) msgid,
1183                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1184 #endif
1185
1186         tmpber = *origber;
1187
1188         /*
1189          * all LDAP requests are sequences that start with a message id.
1190          * For all except delete, this is followed by a sequence that is
1191          * tagged with the operation code.  For delete, the provided DN
1192          * is not wrapped by a sequence.
1193          */
1194         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1195
1196         if ( rtag == LBER_ERROR ) {
1197                 ld->ld_errno = LDAP_DECODING_ERROR;
1198                 return( NULL );
1199         }
1200
1201         assert( tag != 0);
1202         if ( tag == LDAP_REQ_BIND ) {
1203                 /* bind requests have a version number before the DN & other stuff */
1204                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1205
1206         } else if ( tag == LDAP_REQ_DELETE ) {
1207                 /* delete requests don't have a DN wrapping sequence */
1208                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1209
1210         } else if ( tag == LDAP_REQ_SEARCH ) {
1211                 /* search requests need to be re-scope-ed */
1212                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1213
1214                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1215                         /* use the scope provided in reference */
1216                         scope = srv->lud_scope;
1217
1218                 } else if ( sref && scope != LDAP_SCOPE_SUBTREE ) {
1219                         /* use scope implied by previous operation */
1220                         /*   base -> base */
1221                         /*   one -> base */
1222                         /*   subtree -> subtree */
1223                         scope = LDAP_SCOPE_BASE;
1224                 }
1225
1226         } else {
1227                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1228         }
1229
1230         if( rtag == LBER_ERROR ) {
1231                 ld->ld_errno = LDAP_DECODING_ERROR;
1232                 return NULL;
1233         }
1234
1235         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1236                 return NULL;
1237         }
1238
1239         if ( srv->lud_dn == NULL ) {
1240                 dn = orig_dn;
1241         } else {
1242                 dn = srv->lud_dn;
1243         }
1244
1245         if ( tag == LDAP_REQ_BIND ) {
1246                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1247         } else if ( tag == LDAP_REQ_DELETE ) {
1248                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1249         } else if ( tag == LDAP_REQ_SEARCH ) {
1250                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1251         } else {
1252                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1253         }
1254
1255         LDAP_FREE( orig_dn );
1256
1257         if ( rc == -1 ) {
1258                 ld->ld_errno = LDAP_ENCODING_ERROR;
1259                 ber_free( ber, 1 );
1260                 return NULL;
1261         }
1262
1263         if ( tag != LDAP_REQ_DELETE && (
1264                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1265                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1266             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1267         {
1268                 ld->ld_errno = LDAP_ENCODING_ERROR;
1269                 ber_free( ber, 1 );
1270                 return NULL;
1271         }
1272
1273 #ifdef LDAP_DEBUG
1274         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1275 #ifdef NEW_LOGGING
1276                 LDAP_LOG ( OPERATION, DETAIL1,
1277                         "re_encode_request: new request is:\n", 0, 0, 0 );
1278 #else
1279                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1280                     0, 0, 0 );
1281 #endif
1282                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1283         }
1284 #endif /* LDAP_DEBUG */
1285
1286         *type = tag;    /* return request type */
1287         return ber;
1288 }
1289
1290
1291 LDAPRequest *
1292 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1293 {
1294         LDAPRequest     *lr;
1295
1296 #ifdef LDAP_R_COMPILE
1297         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1298 #endif
1299         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1300                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1301                         continue;       /* Skip completed requests */
1302                 }
1303                 if ( msgid == lr->lr_msgid ) {
1304                         break;
1305                 }
1306         }
1307 #ifdef LDAP_R_COMPILE
1308         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1309 #endif
1310
1311         return( lr );
1312 }
1313
1314