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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2005 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  */
  18 /* This notice applies to changes, created by or for Novell, Inc.,
  19  * to preexisting works for which notices appear elsewhere in this file.
  20  *
  21  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  22  *
  23  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  24  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  25  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  26  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  27  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  28  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  29  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  30  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  31  *---
  32  * Modification to OpenLDAP source by Novell, Inc.
  33  * April 2000 sfs  Added code to chase V3 referrals
  34  *  request.c - sending of ldap requests; handling of referrals
  35  *---
  36  * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
  37  * can be found in the file "build/LICENSE-2.0.1" in this distribution
  38  * of OpenLDAP Software.
  39  */
  40
  41 #include "portable.h"
  42
  43 #include <stdio.h>
  44
  45 #include <ac/stdlib.h>
  46
  47 #include <ac/errno.h>
  48 #include <ac/socket.h>
  49 #include <ac/string.h>
  50 #include <ac/time.h>
  51 #include <ac/unistd.h>
  52
  53 #include "ldap-int.h"
  54 #include "lber.h"
  55
  56 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
  57 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
  58
  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;
 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     *lcu, *lsu;
 452         int lcu_port, lsu_port;
 453
 454         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 455                 lcu = lc->lconn_server;
 456                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 457                         lcu->lud_port );
 458
 459                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 460                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 461                                 lsu->lud_port );
 462
 463                         if ( strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 464                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 465                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 466                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0
 467                             && lsu_port == lcu_port )
 468                         {
 469                                 return lc;
 470                         }
 471
 472                         if ( !any ) break;
 473                 }
 474         }
 475
 476         return NULL;
 477 }
 478
 479
 480
 481 static void
 482 use_connection( LDAP *ld, LDAPConn *lc )
 483 {
 484         ++lc->lconn_refcnt;
 485         lc->lconn_lastused = time( NULL );
 486 }
 487
 488
 489 void
 490 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 491 {
 492         LDAPConn        *tmplc, *prevlc;
 493
 494 #ifdef NEW_LOGGING
 495         LDAP_LOG ( OPERATION, ENTRY, "ldap_free_connection\n", 0, 0, 0 );
 496 #else
 497         Debug( LDAP_DEBUG_TRACE, "ldap_free_connection\n", 0, 0, 0 );
 498 #endif
 499
 500         if ( force || --lc->lconn_refcnt <= 0 ) {
 501                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 502                         ldap_mark_select_clear( ld, lc->lconn_sb );
 503                         if ( unbind ) {
 504                                 ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
 505                         }
 506                 }
 507
 508                 if( lc->lconn_ber != NULL ) {
 509                         ber_free( lc->lconn_ber, 1 );
 510                 }
 511
 512                 ldap_int_sasl_close( ld, lc );
 513
 514                 prevlc = NULL;
 515                 for ( tmplc = ld->ld_conns; tmplc != NULL;
 516                     tmplc = tmplc->lconn_next ) {
 517                         if ( tmplc == lc ) {
 518                                 if ( prevlc == NULL ) {
 519                                     ld->ld_conns = tmplc->lconn_next;
 520                                 } else {
 521                                     prevlc->lconn_next = tmplc->lconn_next;
 522                                 }
 523                                 break;
 524                         }
 525                         prevlc = tmplc;
 526                 }
 527                 ldap_free_urllist( lc->lconn_server );
 528 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 529                 if ( lc->lconn_krbinstance != NULL ) {
 530                         LDAP_FREE( lc->lconn_krbinstance );
 531                 }
 532 #endif
 533                 if ( lc->lconn_sb != ld->ld_sb ) {
 534                         ber_sockbuf_free( lc->lconn_sb );
 535                 }
 536                 if( lc->lconn_rebind_queue != NULL) {
 537                         int i;
 538                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++) {
 539                                 LDAP_VFREE(lc->lconn_rebind_queue[i]);
 540                         }
 541                         LDAP_FREE( lc->lconn_rebind_queue);
 542                 }
 543                 LDAP_FREE( lc );
 544 #ifdef NEW_LOGGING
 545                 LDAP_LOG ( OPERATION, RESULTS,
 546                         "ldap_free_connection: actually freed\n", 0, 0, 0 );
 547 #else
 548                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
 549                     0, 0, 0 );
 550 #endif
 551         } else {
 552                 lc->lconn_lastused = time( NULL );
 553 #ifdef NEW_LOGGING
 554                 LDAP_LOG ( OPERATION, RESULTS, "ldap_free_connection: refcnt %d\n",
 555                         lc->lconn_refcnt, 0, 0 );
 556 #else
 557                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 558                     lc->lconn_refcnt, 0, 0 );
 559 #endif
 560         }
 561 }
 562
 563
 564 #ifdef LDAP_DEBUG
 565 void
 566 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 567 {
 568         LDAPConn        *lc;
 569         char            timebuf[32];
 570
 571         fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
 572         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 573                 if ( lc->lconn_server != NULL ) {
 574                         fprintf( stderr, "* host: %s  port: %d%s\n",
 575                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 576                             : lc->lconn_server->lud_host,
 577                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 578                             ld->ld_sb ) ? "  (default)" : "" );
 579                 }
 580                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 581                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 582                     "NeedSocket" : ( lc->lconn_status ==
 583                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 584                 fprintf( stderr, "  last used: %s",
 585                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 586                 if( lc->lconn_rebind_inprogress ) {
 587                         fprintf( stderr, "  rebind in progress\n");
 588                         if( lc->lconn_rebind_queue != NULL) {
 589                                 int i = 0;
 590                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 591                                         int j = 0;
 592                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 593                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 594                                                         i, j, lc->lconn_rebind_queue[i][j]);
 595                                         }
 596                                 }
 597                         } else {
 598                                 fprintf( stderr, "    queue is empty\n");
 599                         }
 600                 }
 601                 fprintf(stderr, "\n");
 602                 if ( !all ) {
 603                         break;
 604                 }
 605         }
 606 }
 607
 608
 609 void
 610 ldap_dump_requests_and_responses( LDAP *ld )
 611 {
 612         LDAPRequest     *lr;
 613         LDAPMessage     *lm, *l;
 614
 615 #ifdef LDAP_R_COMPILE
 616         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 617 #endif
 618         fprintf( stderr, "** Outstanding Requests:\n" );
 619         if (( lr = ld->ld_requests ) == NULL ) {
 620                 fprintf( stderr, "   Empty\n" );
 621         }
 622         for ( ; lr != NULL; lr = lr->lr_next ) {
 623             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 624                 lr->lr_msgid, lr->lr_origid,
 625                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 626                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 627                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 628                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 629                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
 630             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 631                     lr->lr_outrefcnt, lr->lr_parentcnt );
 632         }
 633 #ifdef LDAP_R_COMPILE
 634         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 635 #endif
 636         fprintf( stderr, "** Response Queue:\n" );
 637         if (( lm = ld->ld_responses ) == NULL ) {
 638                 fprintf( stderr, "   Empty\n" );
 639         }
 640         for ( ; lm != NULL; lm = lm->lm_next ) {
 641                 fprintf( stderr, " * msgid %d,  type %lu\n",
 642                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 643                 if (( l = lm->lm_chain ) != NULL ) {
 644                         fprintf( stderr, "   chained responses:\n" );
 645                         for ( ; l != NULL; l = l->lm_chain ) {
 646                                 fprintf( stderr,
 647                                     "  * msgid %d,  type %lu\n",
 648                                     l->lm_msgid,
 649                                     (unsigned long) l->lm_msgtype );
 650                         }
 651                 }
 652         }
 653 }
 654 #endif /* LDAP_DEBUG */
 655
 656 void
 657 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 658 {
 659         if ( lr->lr_prev == NULL ) {
 660                 ld->ld_requests = lr->lr_next;
 661         } else {
 662                 lr->lr_prev->lr_next = lr->lr_next;
 663         }
 664
 665         if ( lr->lr_next != NULL ) {
 666                 lr->lr_next->lr_prev = lr->lr_prev;
 667         }
 668
 669         if ( lr->lr_ber != NULL ) {
 670                 ber_free( lr->lr_ber, 1 );
 671         }
 672
 673         if ( lr->lr_res_error != NULL ) {
 674                 LDAP_FREE( lr->lr_res_error );
 675         }
 676
 677         if ( lr->lr_res_matched != NULL ) {
 678                 LDAP_FREE( lr->lr_res_matched );
 679         }
 680
 681         LDAP_FREE( lr );
 682 }
 683
 684 void
 685 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 686 {
 687         LDAPRequest     **ttmplr;
 688
 689 #ifdef NEW_LOGGING
 690         LDAP_LOG ( OPERATION, ARGS, "ldap_free_request (origid %d, msgid %d)\n",
 691                 lr->lr_origid, lr->lr_msgid, 0 );
 692 #else
 693         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 694                 lr->lr_origid, lr->lr_msgid, 0 );
 695 #endif
 696
 697         /* free all referrals (child requests) */
 698         while ( lr->lr_child )
 699                 ldap_free_request( ld, lr->lr_child );
 700
 701         if ( lr->lr_parent != NULL ) {
 702                 --lr->lr_parent->lr_outrefcnt;
 703                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 704                 if ( *ttmplr == lr )
 705                         *ttmplr = lr->lr_refnext;
 706         }
 707         ldap_free_request_int( ld, lr );
 708 }
 709
 710
 711 /*
 712  * Chase v3 referrals
 713  *
 714  * Parameters:
 715  *  (IN) ld = LDAP connection handle
 716  *  (IN) lr = LDAP Request structure
 717  *  (IN) refs = array of pointers to referral strings that we will chase
 718  *              The array will be free'd by this function when no longer needed
 719  *  (IN) sref != 0 if following search reference
 720  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 721  *  (OUT) hadrefp = 1 if sucessfully followed referral
 722  *
 723  * Return value - number of referrals followed
 724  */
 725 int
 726 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 727 {
 728         char            *unfollowed;
 729         int                      unfollowedcnt = 0;
 730         LDAPRequest     *origreq;
 731         LDAPURLDesc     *srv = NULL;
 732         BerElement      *ber;
 733         char            **refarray = NULL;
 734         LDAPConn        *lc;
 735         int                      rc, count, i, j, id;
 736         LDAPreqinfo  rinfo;
 737
 738         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 739         *hadrefp = 0;
 740
 741 #ifdef NEW_LOGGING
 742         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_v3referrals\n", 0, 0, 0 );
 743 #else
 744         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 745 #endif
 746
 747         unfollowed = NULL;
 748         rc = count = 0;
 749
 750         /* If no referrals in array, return */
 751         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 752                 rc = 0;
 753                 goto done;
 754         }
 755
 756         /* Check for hop limit exceeded */
 757         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 758 #ifdef NEW_LOGGING
 759                 LDAP_LOG ( OPERATION, DETAIL1,
 760                         "ldap_chase_v3referrals: more than %d referral hops (dropping)\n",
 761                         ld->ld_refhoplimit, 0, 0 );
 762 #else
 763                 Debug( LDAP_DEBUG_ANY,
 764                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 765 #endif
 766                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 767             rc = -1;
 768                 goto done;
 769         }
 770
 771         /* find original request */
 772         for ( origreq = lr;
 773                 origreq->lr_parent != NULL;
 774                 origreq = origreq->lr_parent )
 775         {
 776                 /* empty */ ;
 777         }
 778
 779         refarray = refs;
 780         refs = NULL;
 781         /* parse out & follow referrals */
 782         for( i=0; refarray[i] != NULL; i++) {
 783                 /* Parse the referral URL */
 784                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 785                         ld->ld_errno = rc;
 786                         rc = -1;
 787                         goto done;
 788                 }
 789
 790                 if( srv->lud_crit_exts ) {
 791                         /* we do not support any extensions */
 792                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 793                         rc = -1;
 794                         goto done;
 795                 }
 796
 797                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 798                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 799                         LDAP_FREE( srv->lud_dn );
 800                         srv->lud_dn = NULL;
 801                 }
 802
 803                 /* check connection for re-bind in progress */
 804                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 805                         if( lc->lconn_rebind_inprogress) {
 806                                 /* We are already chasing a referral or search reference and a
 807                                  * bind on that connection is in progress.  We must queue
 808                                  * referrals on that connection, so we don't get a request
 809                                  * going out before the bind operation completes. This happens
 810                                  * if two search references come in one behind the other
 811                                  * for the same server with different contexts.
 812                                  */
 813 #ifdef NEW_LOGGING
 814                                 LDAP_LOG ( OPERATION, DETAIL1,
 815                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 816                                         refarray[i], 0, 0 );
 817 #else
 818                                 Debug( LDAP_DEBUG_TRACE,
 819                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 820                                         refarray[i], 0, 0);
 821 #endif
 822                                 if( lc->lconn_rebind_queue == NULL ) {
 823                                         /* Create a referral list */
 824                                         lc->lconn_rebind_queue =
 825                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 826
 827                                         if( lc->lconn_rebind_queue == NULL) {
 828                                                 ld->ld_errno = LDAP_NO_MEMORY;
 829                                                 rc = -1;
 830                                                 goto done;
 831                                         }
 832
 833                                         lc->lconn_rebind_queue[0] = refarray;
 834                                         lc->lconn_rebind_queue[1] = NULL;
 835                                         refarray = NULL;
 836
 837                                 } else {
 838                                         /* Count how many referral arrays we already have */
 839                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 840                                                 /* empty */;
 841                                         }
 842
 843                                         /* Add the new referral to the list */
 844                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 845                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 846
 847                                         if( lc->lconn_rebind_queue == NULL ) {
 848                                                 ld->ld_errno = LDAP_NO_MEMORY;
 849                                                 rc = -1;
 850                                                 goto done;
 851                                         }
 852                                         lc->lconn_rebind_queue[j] = refarray;
 853                                         lc->lconn_rebind_queue[j+1] = NULL;
 854                                         refarray = NULL;
 855                                 }
 856
 857                                 /* We have queued the referral/reference, now just return */
 858                                 rc = 0;
 859                                 *hadrefp = 1;
 860                                 count = 1; /* Pretend we already followed referral */
 861                                 goto done;
 862                         }
 863                 }
 864                 /* Re-encode the request with the new starting point of the search.
 865                  * Note: In the future we also need to replace the filter if one
 866                  * was provided with the search reference
 867                  */
 868
 869                 /* For references we don't want old dn if new dn empty */
 870                 if ( sref && srv->lud_dn == NULL ) {
 871                         srv->lud_dn = LDAP_STRDUP( "" );
 872                 }
 873
 874                 LDAP_NEXT_MSGID( ld, id );
 875                 ber = re_encode_request( ld, origreq->lr_ber, id,
 876                         sref, srv, &rinfo.ri_request );
 877
 878                 if( ber == NULL ) {
 879                         ld->ld_errno = LDAP_ENCODING_ERROR;
 880                         rc = -1;
 881                         goto done;
 882                 }
 883
 884 #ifdef NEW_LOGGING
 885                 LDAP_LOG ( OPERATION, DETAIL1,
 886                         "ldap_chase_v3referrals: msgid %d, url \"%s\"\n",
 887                         lr->lr_msgid, refarray[i], 0 );
 888 #else
 889                 Debug( LDAP_DEBUG_TRACE,
 890                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 891                         lr->lr_msgid, refarray[i], 0);
 892 #endif
 893
 894                 /* Send the new request to the server - may require a bind */
 895                 rinfo.ri_msgid = origreq->lr_origid;
 896                 rinfo.ri_url = refarray[i];
 897 #ifdef LDAP_R_COMPILE
 898                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 899 #endif
 900                 rc = ldap_send_server_request( ld, ber, id,
 901                         origreq, srv, NULL, &rinfo );
 902 #ifdef LDAP_R_COMPILE
 903                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 904 #endif
 905                 if ( rc < 0 ) {
 906                         /* Failure, try next referral in the list */
 907 #ifdef NEW_LOGGING
 908                         LDAP_LOG ( OPERATION, ERR,
 909                         "ldap_chase_v3referrals: Unable to chase referral \"%s\" (%s)\n",
 910                         refarray[i], ldap_err2string( ld->ld_errno ), 0 );
 911 #else
 912                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
 913                                 refarray[i], ldap_err2string( ld->ld_errno ), 0);
 914 #endif
 915                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
 916                         ldap_free_urllist(srv);
 917                         srv = NULL;
 918                 } else {
 919                         /* Success, no need to try this referral list further */
 920                         rc = 0;
 921                         ++count;
 922                         *hadrefp = 1;
 923
 924                         /* check if there is a queue of referrals that came in during bind */
 925                         if( lc == NULL) {
 926                                 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
 927                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
 928                                         rc = -1;
 929                                         goto done;
 930                                 }
 931                         }
 932
 933                         if( lc->lconn_rebind_queue != NULL) {
 934                                 /* Release resources of previous list */
 935                                 LDAP_VFREE(refarray);
 936                                 refarray = NULL;
 937                                 ldap_free_urllist(srv);
 938                                 srv = NULL;
 939
 940                                 /* Pull entries off end of queue so list always null terminated */
 941                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 942                                         ;
 943                                 }
 944                                 refarray = lc->lconn_rebind_queue[j-1];
 945                                 lc->lconn_rebind_queue[j-1] = NULL;
 946                                 /* we pulled off last entry from queue, free queue */
 947                                 if ( j == 1 ) {
 948                                         LDAP_FREE( lc->lconn_rebind_queue);
 949                                         lc->lconn_rebind_queue = NULL;
 950                                 }
 951                                 /* restart the loop the with new referral list */
 952                                 i = -1;
 953                                 continue;
 954                         }
 955                         break; /* referral followed, break out of for loop */
 956                 }
 957         } /* end for loop */
 958 done:
 959         LDAP_VFREE(refarray);
 960         ldap_free_urllist(srv);
 961         LDAP_FREE( *errstrp );
 962
 963         if( rc == 0) {
 964                 *errstrp = NULL;
 965                 LDAP_FREE( unfollowed );
 966                 return count;
 967         } else {
 968                 ld->ld_errno = LDAP_REFERRAL;
 969                 *errstrp = unfollowed;
 970                 return rc;
 971         }
 972 }
 973
 974 /*
 975  * XXX merging of errors in this routine needs to be improved
 976  */
 977 int
 978 ldap_chase_referrals( LDAP *ld,
 979         LDAPRequest *lr,
 980         char **errstrp,
 981         int sref,
 982         int *hadrefp )
 983 {
 984         int             rc, count, id;
 985         unsigned        len;
 986         char            *p, *ref, *unfollowed;
 987         LDAPRequest     *origreq;
 988         LDAPURLDesc     *srv;
 989         BerElement      *ber;
 990         LDAPreqinfo  rinfo;
 991
 992 #ifdef NEW_LOGGING
 993         LDAP_LOG ( OPERATION, ENTRY, "ldap_chase_referrals\n", 0, 0, 0 );
 994 #else
 995         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
 996 #endif
 997
 998         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 999         *hadrefp = 0;
1000
1001         if ( *errstrp == NULL ) {
1002                 return( 0 );
1003         }
1004
1005         len = strlen( *errstrp );
1006         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1007                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1008                         *p = '\0';
1009                         p += LDAP_REF_STR_LEN;
1010                         break;
1011                 }
1012         }
1013
1014         if ( len < LDAP_REF_STR_LEN ) {
1015                 return( 0 );
1016         }
1017
1018         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1019 #ifdef NEW_LOGGING
1020                 LDAP_LOG ( OPERATION, ENTRY,
1021                         "ldap_chase_referrals: more than %d referral hops (dropping)\n",
1022                         ld->ld_refhoplimit, 0, 0 );
1023 #else
1024                 Debug( LDAP_DEBUG_ANY,
1025                     "more than %d referral hops (dropping)\n",
1026                     ld->ld_refhoplimit, 0, 0 );
1027 #endif
1028                     /* XXX report as error in ld->ld_errno? */
1029                     return( 0 );
1030         }
1031
1032         /* find original request */
1033         for ( origreq = lr; origreq->lr_parent != NULL;
1034              origreq = origreq->lr_parent ) {
1035                 /* empty */;
1036         }
1037
1038         unfollowed = NULL;
1039         rc = count = 0;
1040
1041         /* parse out & follow referrals */
1042         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1043                 if (( p = strchr( ref, '\n' )) != NULL ) {
1044                         *p++ = '\0';
1045                 } else {
1046                         p = NULL;
1047                 }
1048
1049                 rc = ldap_url_parse_ext( ref, &srv );
1050
1051                 if ( rc != LDAP_URL_SUCCESS ) {
1052 #ifdef NEW_LOGGING
1053                         LDAP_LOG ( OPERATION, DETAIL1,
1054                                 "ldap_chase_referrals: ignoring unknown referral <%s>\n",
1055                                 ref, 0, 0 );
1056 #else
1057                         Debug( LDAP_DEBUG_TRACE,
1058                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1059 #endif
1060                         rc = ldap_append_referral( ld, &unfollowed, ref );
1061                         *hadrefp = 1;
1062                         continue;
1063                 }
1064
1065                 if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1066                         LDAP_FREE( srv->lud_dn );
1067                         srv->lud_dn = NULL;
1068                 }
1069
1070 #ifdef NEW_LOGGING
1071                 LDAP_LOG ( OPERATION, DETAIL1,
1072                         "ldap_chase_referrals: chasing LDAP referral <%s>\n", ref, 0, 0 );
1073 #else
1074                 Debug( LDAP_DEBUG_TRACE,
1075                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1076 #endif
1077
1078                 *hadrefp = 1;
1079
1080                 LDAP_NEXT_MSGID( ld, id );
1081                 ber = re_encode_request( ld, origreq->lr_ber,
1082                     id, sref, srv, &rinfo.ri_request );
1083
1084                 if( ber == NULL ) {
1085                         return -1 ;
1086                 }
1087
1088                 /* copy the complete referral for rebind process */
1089                 rinfo.ri_url = LDAP_STRDUP( ref );
1090
1091                 rinfo.ri_msgid = origreq->lr_origid;
1092
1093 #ifdef LDAP_R_COMPILE
1094         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1095 #endif
1096                 rc = ldap_send_server_request( ld, ber, id,
1097                     lr, srv, NULL, &rinfo );
1098 #ifdef LDAP_R_COMPILE
1099         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1100 #endif
1101
1102                 LDAP_FREE( rinfo.ri_url );
1103
1104                 if( rc >= 0 ) {
1105                         ++count;
1106                 } else {
1107 #ifdef NEW_LOGGING
1108                         LDAP_LOG ( OPERATION, ERR,
1109                                 "ldap_chase_referrals: Unable to chase referral <%s>\n",
1110                                 ldap_err2string( ld->ld_errno), 0, 0 );
1111 #else
1112                         Debug( LDAP_DEBUG_ANY,
1113                             "Unable to chase referral (%s)\n",
1114                             ldap_err2string( ld->ld_errno ), 0, 0 );
1115 #endif
1116                         rc = ldap_append_referral( ld, &unfollowed, ref );
1117                 }
1118
1119                 ldap_free_urllist(srv);
1120         }
1121
1122         LDAP_FREE( *errstrp );
1123         *errstrp = unfollowed;
1124
1125         return(( rc == 0 ) ? count : rc );
1126 }
1127
1128
1129 int
1130 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1131 {
1132         int     first;
1133
1134         if ( *referralsp == NULL ) {
1135                 first = 1;
1136                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1137                     + 1 );
1138         } else {
1139                 first = 0;
1140                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1141                     strlen( *referralsp ) + strlen( s ) + 2 );
1142         }
1143
1144         if ( *referralsp == NULL ) {
1145                 ld->ld_errno = LDAP_NO_MEMORY;
1146                 return( -1 );
1147         }
1148
1149         if ( first ) {
1150                 strcpy( *referralsp, LDAP_REF_STR );
1151         } else {
1152                 strcat( *referralsp, "\n" );
1153         }
1154         strcat( *referralsp, s );
1155
1156         return( 0 );
1157 }
1158
1159
1160
1161 static BerElement *
1162 re_encode_request( LDAP *ld,
1163         BerElement *origber,
1164         ber_int_t msgid,
1165         int sref,
1166         LDAPURLDesc *srv,
1167         int *type )
1168 {
1169         /*
1170          * XXX this routine knows way too much about how the lber library works!
1171          */
1172         ber_int_t       along;
1173         ber_tag_t       tag;
1174         ber_tag_t       rtag;
1175         ber_int_t       ver;
1176         ber_int_t       scope;
1177         int             rc;
1178         BerElement      tmpber, *ber;
1179         char            *orig_dn;
1180         char            *dn;
1181
1182 #ifdef NEW_LOGGING
1183         LDAP_LOG ( OPERATION, ARGS,
1184                 "re_encode_request: new msgid %ld, new dn <%s>\n",
1185                 (long) msgid,
1186                 ( srv == NULL || srv->lud_dn == NULL ) ? "NONE" : srv->lud_dn, 0 );
1187 #else
1188         Debug( LDAP_DEBUG_TRACE,
1189             "re_encode_request: new msgid %ld, new dn <%s>\n",
1190             (long) msgid,
1191                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1192 #endif
1193
1194         tmpber = *origber;
1195
1196         /*
1197          * all LDAP requests are sequences that start with a message id.
1198          * For all except delete, this is followed by a sequence that is
1199          * tagged with the operation code.  For delete, the provided DN
1200          * is not wrapped by a sequence.
1201          */
1202         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1203
1204         if ( rtag == LBER_ERROR ) {
1205                 ld->ld_errno = LDAP_DECODING_ERROR;
1206                 return( NULL );
1207         }
1208
1209         assert( tag != 0);
1210         if ( tag == LDAP_REQ_BIND ) {
1211                 /* bind requests have a version number before the DN & other stuff */
1212                 rtag = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1213
1214         } else if ( tag == LDAP_REQ_DELETE ) {
1215                 /* delete requests don't have a DN wrapping sequence */
1216                 rtag = ber_scanf( &tmpber, "a", &orig_dn );
1217
1218         } else if ( tag == LDAP_REQ_SEARCH ) {
1219                 /* search requests need to be re-scope-ed */
1220                 rtag = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1221
1222                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1223                         /* use the scope provided in reference */
1224                         scope = srv->lud_scope;
1225
1226                 } else if ( sref && scope != LDAP_SCOPE_SUBTREE ) {
1227                         /* use scope implied by previous operation */
1228                         /*   base -> base */
1229                         /*   one -> base */
1230                         /*   subtree -> subtree */
1231                         scope = LDAP_SCOPE_BASE;
1232                 }
1233
1234         } else {
1235                 rtag = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1236         }
1237
1238         if( rtag == LBER_ERROR ) {
1239                 ld->ld_errno = LDAP_DECODING_ERROR;
1240                 return NULL;
1241         }
1242
1243         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1244                 return NULL;
1245         }
1246
1247         if ( srv->lud_dn == NULL ) {
1248                 dn = orig_dn;
1249         } else {
1250                 dn = srv->lud_dn;
1251         }
1252
1253         if ( tag == LDAP_REQ_BIND ) {
1254                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1255         } else if ( tag == LDAP_REQ_DELETE ) {
1256                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1257         } else if ( tag == LDAP_REQ_SEARCH ) {
1258                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1259         } else {
1260                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1261         }
1262
1263         LDAP_FREE( orig_dn );
1264
1265         if ( rc == -1 ) {
1266                 ld->ld_errno = LDAP_ENCODING_ERROR;
1267                 ber_free( ber, 1 );
1268                 return NULL;
1269         }
1270
1271         if ( tag != LDAP_REQ_DELETE && (
1272                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1273                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1274             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1275         {
1276                 ld->ld_errno = LDAP_ENCODING_ERROR;
1277                 ber_free( ber, 1 );
1278                 return NULL;
1279         }
1280
1281 #ifdef LDAP_DEBUG
1282         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1283 #ifdef NEW_LOGGING
1284                 LDAP_LOG ( OPERATION, DETAIL1,
1285                         "re_encode_request: new request is:\n", 0, 0, 0 );
1286 #else
1287                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1288                     0, 0, 0 );
1289 #endif
1290                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1291         }
1292 #endif /* LDAP_DEBUG */
1293
1294         *type = tag;    /* return request type */
1295         return ber;
1296 }
1297
1298
1299 LDAPRequest *
1300 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1301 {
1302         LDAPRequest     *lr;
1303
1304 #ifdef LDAP_R_COMPILE
1305         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1306 #endif
1307         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1308                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1309                         continue;       /* Skip completed requests */
1310                 }
1311                 if ( msgid == lr->lr_msgid ) {
1312                         break;
1313                 }
1314         }
1315 #ifdef LDAP_R_COMPILE
1316         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1317 #endif
1318
1319         return( lr );
1320 }
1321
1322