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         int                      parent_was_reference;
 729         LDAPreqinfo  rinfo;
 730
 731         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 732         *hadrefp = 0;
 733
 734 #ifdef NEW_LOGGING
 735         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_v3referrals\n", 0, 0, 0 );
 736 #else
 737         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 738 #endif
 739
 740         unfollowed = NULL;
 741         rc = count = 0;
 742
 743         /* If no referrals in array, return */
 744         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 745                 rc = 0;
 746                 goto done;
 747         }
 748
 749         /* Check for hop limit exceeded */
 750         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 751 #ifdef NEW_LOGGING
 752                 LDAP_LOG ( OPERATION, DETAIL1,
 753                         "ldap_chase_v3referrals: more than %d referral hops (dropping)\n",
 754                         ld->ld_refhoplimit, 0, 0 );
 755 #else
 756                 Debug( LDAP_DEBUG_ANY,
 757                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 758 #endif
 759                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 760             rc = -1;
 761                 goto done;
 762         }
 763
 764         /* check if parent request was a search reference */
 765         parent_was_reference = ( lr->lr_parent &&
 766                 lr->lr_parent->lr_res_msgtype == LDAP_RES_SEARCH_REFERENCE ) ?
 767                 1 : 0;
 768
 769         /* find original request */
 770         for ( origreq = lr;
 771                 origreq->lr_parent != NULL;
 772                 origreq = origreq->lr_parent )
 773         {
 774                 /* empty */ ;
 775         }
 776
 777         refarray = refs;
 778         refs = NULL;
 779         /* parse out & follow referrals */
 780         for( i=0; refarray[i] != NULL; i++) {
 781                 /* Parse the referral URL */
 782                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 783                         ld->ld_errno = rc;
 784                         rc = -1;
 785                         goto done;
 786                 }
 787
 788                 if( srv->lud_crit_exts ) {
 789                         /* we do not support any extensions */
 790                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 791                         rc = -1;
 792                         goto done;
 793                 }
 794
 795                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 796                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 797                         LDAP_FREE( srv->lud_dn );
 798                         srv->lud_dn = NULL;
 799                 }
 800
 801                 /* check connection for re-bind in progress */
 802                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 803                         if( lc->lconn_rebind_inprogress) {
 804                                 /* We are already chasing a referral or search reference and a
 805                                  * bind on that connection is in progress.  We must queue
 806                                  * referrals on that connection, so we don't get a request
 807                                  * going out before the bind operation completes. This happens
 808                                  * if two search references come in one behind the other
 809                                  * for the same server with different contexts.
 810                                  */
 811 #ifdef NEW_LOGGING
 812                                 LDAP_LOG ( OPERATION, DETAIL1,
 813                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 814                                         refarray[i], 0, 0 );
 815 #else
 816                                 Debug( LDAP_DEBUG_TRACE,
 817                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 818                                         refarray[i], 0, 0);
 819 #endif
 820                                 if( lc->lconn_rebind_queue == NULL ) {
 821                                         /* Create a referral list */
 822                                         lc->lconn_rebind_queue =
 823                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 824
 825                                         if( lc->lconn_rebind_queue == NULL) {
 826                                                 ld->ld_errno = LDAP_NO_MEMORY;
 827                                                 rc = -1;
 828                                                 goto done;
 829                                         }
 830
 831                                         lc->lconn_rebind_queue[0] = refarray;
 832                                         lc->lconn_rebind_queue[1] = NULL;
 833                                         refarray = NULL;
 834
 835                                 } else {
 836                                         /* Count how many referral arrays we already have */
 837                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 838                                                 /* empty */;
 839                                         }
 840
 841                                         /* Add the new referral to the list */
 842                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 843                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 844
 845                                         if( lc->lconn_rebind_queue == NULL ) {
 846                                                 ld->ld_errno = LDAP_NO_MEMORY;
 847                                                 rc = -1;
 848                                                 goto done;
 849                                         }
 850                                         lc->lconn_rebind_queue[j] = refarray;
 851                                         lc->lconn_rebind_queue[j+1] = NULL;
 852                                         refarray = NULL;
 853                                 }
 854
 855                                 /* We have queued the referral/reference, now just return */
 856                                 rc = 0;
 857                                 *hadrefp = 1;
 858                                 count = 1; /* Pretend we already followed referral */
 859                                 goto done;
 860                         }
 861                 }
 862                 /* Re-encode the request with the new starting point of the search.
 863                  * Note: In the future we also need to replace the filter if one
 864                  * was provided with the search reference
 865                  */
 866
 867                 /* For references we don't want old dn if new dn empty */
 868                 if ( sref && srv->lud_dn == NULL ) {
 869                         srv->lud_dn = LDAP_STRDUP( "" );
 870                 }
 871
 872                 LDAP_NEXT_MSGID( ld, id );
 873                 ber = re_encode_request( ld, origreq->lr_ber, id,
 874                         sref, srv, &rinfo.ri_request );
 875
 876                 if( ber == NULL ) {
 877                         ld->ld_errno = LDAP_ENCODING_ERROR;
 878                         rc = -1;
 879                         goto done;
 880                 }
 881
 882 #ifdef NEW_LOGGING
 883                 LDAP_LOG ( OPERATION, DETAIL1,
 884                         "ldap_chase_v3referrals: msgid %d, url \"%s\"\n",
 885                         lr->lr_msgid, refarray[i], 0 );
 886 #else
 887                 Debug( LDAP_DEBUG_TRACE,
 888                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 889                         lr->lr_msgid, refarray[i], 0);
 890 #endif
 891
 892                 /* Send the new request to the server - may require a bind */
 893                 rinfo.ri_msgid = origreq->lr_origid;
 894                 rinfo.ri_url = refarray[i];
 895 #ifdef LDAP_R_COMPILE
 896                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 897 #endif
 898                 rc = ldap_send_server_request( ld, ber, id,
 899                         (sref && !parent_was_reference) ? origreq : lr,
 900                         srv, NULL, &rinfo );
 901 #ifdef LDAP_R_COMPILE
 902                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 903 #endif
 904                 if ( rc < 0 ) {
 905                         /* Failure, try next referral in the list */
 906 #ifdef NEW_LOGGING
 907                         LDAP_LOG ( OPERATION, ERR,
 908                         "ldap_chase_v3referrals: Unable to chase referral \"%s\" (%s)\n",
 909                         refarray[i], ldap_err2string( ld->ld_errno ), 0 );
 910 #else
 911                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
 912                                 refarray[i], ldap_err2string( ld->ld_errno ), 0);
 913 #endif
 914                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
 915                         ldap_free_urllist(srv);
 916                         srv = NULL;
 917                 } else {
 918                         /* Success, no need to try this referral list further */
 919                         rc = 0;
 920                         ++count;
 921                         *hadrefp = 1;
 922
 923                         /* check if there is a queue of referrals that came in during bind */
 924                         if( lc == NULL) {
 925                                 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
 926                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 927                                         rc = -1;
 928                                         goto done;
 929                                 }
 930                         }
 931
 932                         if( lc->lconn_rebind_queue != NULL) {
 933                                 /* Release resources of previous list */
 934                                 LDAP_VFREE(refarray);
 935                                 refarray = NULL;
 936                                 ldap_free_urllist(srv);
 937                                 srv = NULL;
 938
 939                                 /* Pull entries off end of queue so list always null terminated */
 940                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 941                                         ;
 942                                 }
 943                                 refarray = lc->lconn_rebind_queue[j-1];
 944                                 lc->lconn_rebind_queue[j-1] = NULL;
 945                                 /* we pulled off last entry from queue, free queue */
 946                                 if ( j == 1 ) {
 947                                         LDAP_FREE( lc->lconn_rebind_queue);
 948                                         lc->lconn_rebind_queue = NULL;
 949                                 }
 950                                 /* restart the loop the with new referral list */
 951                                 i = -1;
 952                                 continue;
 953                         }
 954                         break; /* referral followed, break out of for loop */
 955                 }
 956         } /* end for loop */
 957 done:
 958         LDAP_VFREE(refarray);
 959         ldap_free_urllist(srv);
 960         LDAP_FREE( *errstrp );
 961
 962         if( rc == 0) {
 963                 *errstrp = NULL;
 964                 LDAP_FREE( unfollowed );
 965                 return count;
 966         } else {
 967                 ld->ld_errno = LDAP_REFERRAL;
 968                 *errstrp = unfollowed;
 969                 return rc;
 970         }
 971 }
 972
 973 /*
 974  * XXX merging of errors in this routine needs to be improved
 975  */
 976 int
 977 ldap_chase_referrals( LDAP *ld,
 978         LDAPRequest *lr,
 979         char **errstrp,
 980         int sref,
 981         int *hadrefp )
 982 {
 983         int             rc, count, id;
 984         unsigned        len;
 985         char            *p, *ref, *unfollowed;
 986         LDAPRequest     *origreq;
 987         LDAPURLDesc     *srv;
 988         BerElement      *ber;
 989         LDAPreqinfo  rinfo;
 990
 991 #ifdef NEW_LOGGING
 992         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_referrals\n", 0, 0, 0 );
 993 #else
 994         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 995 #endif
 996
 997         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 998         *hadrefp = 0;
 999
1000         if ( *errstrp == NULL ) {
1001                 return( 0 );
1002         }
1003
1004         len = strlen( *errstrp );
1005         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1006                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1007                         *p = '\0';
1008                         p += LDAP_REF_STR_LEN;
1009                         break;
1010                 }
1011         }
1012
1013         if ( len < LDAP_REF_STR_LEN ) {
1014                 return( 0 );
1015         }
1016
1017         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1018 #ifdef NEW_LOGGING
1019                 LDAP_LOG ( OPERATION, ENTRY,
1020                         "ldap_chase_referrals: more than %d referral hops (dropping)\n",
1021                         ld->ld_refhoplimit, 0, 0 );
1022 #else
1023                 Debug( LDAP_DEBUG_ANY,
1024                     "more than %d referral hops (dropping)\n",
1025                     ld->ld_refhoplimit, 0, 0 );
1026 #endif
1027                     /* XXX report as error in ld->ld_errno? */
1028                     return( 0 );
1029         }
1030
1031         /* find original request */
1032         for ( origreq = lr; origreq->lr_parent != NULL;
1033              origreq = origreq->lr_parent ) {
1034                 /* empty */;
1035         }
1036
1037         unfollowed = NULL;
1038         rc = count = 0;
1039
1040         /* parse out & follow referrals */
1041         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1042                 if (( p = strchr( ref, '\n' )) != NULL ) {
1043                         *p++ = '\0';
1044                 } else {
1045                         p = NULL;
1046                 }
1047
1048                 rc = ldap_url_parse_ext( ref, &srv );
1049
1050                 if ( rc != LDAP_URL_SUCCESS ) {
1051 #ifdef NEW_LOGGING
1052                         LDAP_LOG ( OPERATION, DETAIL1,
1053                                 "ldap_chase_referrals: ignoring unknown referral <%s>\n",
1054                                 ref, 0, 0 );
1055 #else
1056                         Debug( LDAP_DEBUG_TRACE,
1057                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1058 #endif
1059                         rc = ldap_append_referral( ld, &unfollowed, ref );
1060                         *hadrefp = 1;
1061                         continue;
1062                 }
1063
1064                 if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1065                         LDAP_FREE( srv->lud_dn );
1066                         srv->lud_dn = NULL;
1067                 }
1068
1069 #ifdef NEW_LOGGING
1070                 LDAP_LOG ( OPERATION, DETAIL1,
1071                         "ldap_chase_referrals: chasing LDAP referral <%s>\n", ref, 0, 0 );
1072 #else
1073                 Debug( LDAP_DEBUG_TRACE,
1074                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1075 #endif
1076
1077                 *hadrefp = 1;
1078
1079                 LDAP_NEXT_MSGID( ld, id );
1080                 ber = re_encode_request( ld, origreq->lr_ber,
1081                     id, sref, srv, &rinfo.ri_request );
1082
1083                 if( ber == NULL ) {
1084                         return -1 ;
1085                 }
1086
1087                 /* copy the complete referral for rebind process */
1088                 rinfo.ri_url = LDAP_STRDUP( ref );
1089
1090                 rinfo.ri_msgid = origreq->lr_origid;
1091
1092 #ifdef LDAP_R_COMPILE
1093         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1094 #endif
1095                 rc = ldap_send_server_request( ld, ber, id,
1096                     lr, srv, NULL, &rinfo );
1097 #ifdef LDAP_R_COMPILE
1098         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1099 #endif
1100
1101                 LDAP_FREE( rinfo.ri_url );
1102
1103                 if( rc >= 0 ) {
1104                         ++count;
1105                 } else {
1106 #ifdef NEW_LOGGING
1107                         LDAP_LOG ( OPERATION, ERR,
1108                                 "ldap_chase_referrals: Unable to chase referral <%s>\n",
1109                                 ldap_err2string( ld->ld_errno), 0, 0 );
1110 #else
1111                         Debug( LDAP_DEBUG_ANY,
1112                             "Unable to chase referral (%s)\n",
1113                             ldap_err2string( ld->ld_errno ), 0, 0 );
1114 #endif
1115                         rc = ldap_append_referral( ld, &unfollowed, ref );
1116                 }
1117
1118                 ldap_free_urllist(srv);
1119         }
1120
1121         LDAP_FREE( *errstrp );
1122         *errstrp = unfollowed;
1123
1124         return(( rc == 0 ) ? count : rc );
1125 }
1126
1127
1128 int
1129 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1130 {
1131         int     first;
1132
1133         if ( *referralsp == NULL ) {
1134                 first = 1;
1135                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1136                     + 1 );
1137         } else {
1138                 first = 0;
1139                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1140                     strlen( *referralsp ) + strlen( s ) + 2 );
1141         }
1142
1143         if ( *referralsp == NULL ) {
1144                 ld->ld_errno = LDAP_NO_MEMORY;
1145                 return( -1 );
1146         }
1147
1148         if ( first ) {
1149                 strcpy( *referralsp, LDAP_REF_STR );
1150         } else {
1151                 strcat( *referralsp, "\n" );
1152         }
1153         strcat( *referralsp, s );
1154
1155         return( 0 );
1156 }
1157
1158
1159
1160 static BerElement *
1161 re_encode_request( LDAP *ld,
1162         BerElement *origber,
1163         ber_int_t msgid,
1164         int sref,
1165         LDAPURLDesc *srv,
1166         int *type )
1167 {
1168         /*
1169          * XXX this routine knows way too much about how the lber library works!
1170          */
1171         ber_int_t       along;
1172         ber_tag_t       tag;
1173         ber_tag_t       rtag;
1174         ber_int_t       ver;
1175         ber_int_t       scope;
1176         int             rc;
1177         BerElement      tmpber, *ber;
1178         char            *orig_dn;
1179         char            *dn;
1180
1181 #ifdef NEW_LOGGING
1182         LDAP_LOG ( OPERATION, ARGS,
1183                 "re_encode_request: new msgid %ld, new dn <%s>\n",
1184                 (long) msgid,
1185                 ( srv == NULL || srv->lud_dn == NULL ) ? "NONE" : srv->lud_dn, 0 );
1186 #else
1187         Debug( LDAP_DEBUG_TRACE,
1188             "re_encode_request: new msgid %ld, new dn <%s>\n",
1189             (long) msgid,
1190                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1191 #endif
1192
1193         tmpber = *origber;
1194
1195         /*
1196          * all LDAP requests are sequences that start with a message id.
1197          * For all except delete, this is followed by a sequence that is
1198          * tagged with the operation code.  For delete, the provided DN
1199          * is not wrapped by a sequence.
1200          */
1201         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1202
1203         if ( rtag == LBER_ERROR ) {
1204                 ld->ld_errno = LDAP_DECODING_ERROR;
1205                 return( NULL );
1206         }
1207
1208         assert( tag != 0);
1209         if ( tag == LDAP_REQ_BIND ) {
1210                 /* bind requests have a version number before the DN & other stuff */
1211                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1212
1213         } else if ( tag == LDAP_REQ_DELETE ) {
1214                 /* delete requests don't have a DN wrapping sequence */
1215                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1216
1217         } else if ( tag == LDAP_REQ_SEARCH ) {
1218                 /* search requests need to be re-scope-ed */
1219                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1220
1221                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1222                         /* use the scope provided in reference */
1223                         scope = srv->lud_scope;
1224
1225                 } else if ( sref && scope != LDAP_SCOPE_SUBTREE ) {
1226                         /* use scope implied by previous operation */
1227                         /*   base -> base */
1228                         /*   one -> base */
1229                         /*   subtree -> subtree */
1230                         scope = LDAP_SCOPE_BASE;
1231                 }
1232
1233         } else {
1234                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1235         }
1236
1237         if( rtag == LBER_ERROR ) {
1238                 ld->ld_errno = LDAP_DECODING_ERROR;
1239                 return NULL;
1240         }
1241
1242         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1243                 return NULL;
1244         }
1245
1246         if ( srv->lud_dn == NULL ) {
1247                 dn = orig_dn;
1248         } else {
1249                 dn = srv->lud_dn;
1250         }
1251
1252         if ( tag == LDAP_REQ_BIND ) {
1253                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1254         } else if ( tag == LDAP_REQ_DELETE ) {
1255                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1256         } else if ( tag == LDAP_REQ_SEARCH ) {
1257                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1258         } else {
1259                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1260         }
1261
1262         LDAP_FREE( orig_dn );
1263
1264         if ( rc == -1 ) {
1265                 ld->ld_errno = LDAP_ENCODING_ERROR;
1266                 ber_free( ber, 1 );
1267                 return NULL;
1268         }
1269
1270         if ( tag != LDAP_REQ_DELETE && (
1271                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1272                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1273             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1274         {
1275                 ld->ld_errno = LDAP_ENCODING_ERROR;
1276                 ber_free( ber, 1 );
1277                 return NULL;
1278         }
1279
1280 #ifdef LDAP_DEBUG
1281         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1282 #ifdef NEW_LOGGING
1283                 LDAP_LOG ( OPERATION, DETAIL1,
1284                         "re_encode_request: new request is:\n", 0, 0, 0 );
1285 #else
1286                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1287                     0, 0, 0 );
1288 #endif
1289                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1290         }
1291 #endif /* LDAP_DEBUG */
1292
1293         *type = tag;    /* return request type */
1294         return ber;
1295 }
1296
1297
1298 LDAPRequest *
1299 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1300 {
1301         LDAPRequest     *lr;
1302
1303 #ifdef LDAP_R_COMPILE
1304         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1305 #endif
1306         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1307                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1308                         continue;       /* Skip completed requests */
1309                 }
1310                 if ( msgid == lr->lr_msgid ) {
1311                         break;
1312                 }
1313         }
1314 #ifdef LDAP_R_COMPILE
1315         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1316 #endif
1317
1318         return( lr );
1319 }
1320
1321