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 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  */
  18 /* This notice applies to changes, created by or for Novell, Inc.,
  19  * to preexisting works for which notices appear elsewhere in this file.
  20  *
  21  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  22  *
  23  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  24  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  25  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  26  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  27  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  28  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  29  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  30  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  31  *---
  32  * Modification to OpenLDAP source by Novell, Inc.
  33  * April 2000 sfs  Added code to chase V3 referrals
  34  *  request.c - sending of ldap requests; handling of referrals
  35  *---
  36  * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
  37  * can be found in the file "build/LICENSE-2.0.1" in this distribution
  38  * of OpenLDAP Software.
  39  */
  40
  41 #include "portable.h"
  42
  43 #include <stdio.h>
  44
  45 #include <ac/stdlib.h>
  46
  47 #include <ac/errno.h>
  48 #include <ac/socket.h>
  49 #include <ac/string.h>
  50 #include <ac/time.h>
  51 #include <ac/unistd.h>
  52
  53 #include "ldap-int.h"
  54 #include "lber.h"
  55
  56 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
  57 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
  58 static void ldap_free_request_int LDAP_P(( LDAP *ld, LDAPRequest *lr ));
  59
  60 static BerElement *
  61 re_encode_request( LDAP *ld,
  62         BerElement *origber,
  63         ber_int_t msgid,
  64         int sref,
  65         LDAPURLDesc *srv,
  66         int *type );
  67
  68 BerElement *
  69 ldap_alloc_ber_with_options( LDAP *ld )
  70 {
  71         BerElement      *ber;
  72
  73     if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
  74                 ld->ld_errno = LDAP_NO_MEMORY;
  75         }
  76
  77         return( ber );
  78 }
  79
  80
  81 void
  82 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  83 {
  84         ber->ber_options = ld->ld_lberoptions;
  85 }
  86
  87
  88 ber_int_t
  89 ldap_send_initial_request(
  90         LDAP *ld,
  91         ber_tag_t msgtype,
  92         const char *dn,
  93         BerElement *ber,
  94         ber_int_t msgid)
  95 {
  96         LDAPURLDesc     *servers;
  97         int rc;
  98
  99         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
 100
 101         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 102                 /* not connected yet */
 103                 int rc = ldap_open_defconn( ld );
 104
 105                 if( rc < 0 ) {
 106                         ber_free( ber, 1 );
 107                         return( -1 );
 108                 }
 109
 110                 Debug( LDAP_DEBUG_TRACE,
 111                         "ldap_open_defconn: successful\n",
 112                         0, 0, 0 );
 113         }
 114
 115         {
 116                 /*
 117                  * use of DNS is turned off or this is an X.500 DN...
 118                  * use our default connection
 119                  */
 120                 servers = NULL;
 121         }
 122
 123 #ifdef LDAP_CONNECTIONLESS
 124         if (LDAP_IS_UDP(ld)) {
 125                 if (msgtype == LDAP_REQ_BIND) {
 126                         if (ld->ld_options.ldo_cldapdn)
 127                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 128                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 129                         return 0;
 130                 }
 131                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 132                         return LDAP_PARAM_ERROR;
 133         }
 134 #endif
 135 #ifdef LDAP_R_COMPILE
 136         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 137 #endif
 138         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 139                 servers, NULL, NULL );
 140 #ifdef LDAP_R_COMPILE
 141         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 142 #endif
 143         if (servers)
 144                 ldap_free_urllist(servers);
 145         return(rc);
 146 }
 147
 148
 149 int
 150 ldap_int_flush_request(
 151         LDAP *ld,
 152         LDAPRequest *lr )
 153 {
 154         LDAPConn *lc = lr->lr_conn;
 155
 156         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 157                 if ( errno == EAGAIN ) {
 158                         /* need to continue write later */
 159                         lr->lr_status = LDAP_REQST_WRITING;
 160                         ldap_mark_select_write( ld, lc->lconn_sb );
 161                         ld->ld_errno = LDAP_BUSY;
 162                         return -2;
 163                 } else {
 164                         ld->ld_errno = LDAP_SERVER_DOWN;
 165                         ldap_free_request( ld, lr );
 166                         ldap_free_connection( ld, lc, 0, 0 );
 167                         return( -1 );
 168                 }
 169         } else {
 170                 if ( lr->lr_parent == NULL ) {
 171                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 172                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 173                 }
 174                 lr->lr_status = LDAP_REQST_INPROGRESS;
 175
 176                 /* sent -- waiting for a response */
 177                 ldap_mark_select_read( ld, lc->lconn_sb );
 178         }
 179         return 0;
 180 }
 181
 182 int
 183 ldap_send_server_request(
 184         LDAP *ld,
 185         BerElement *ber,
 186         ber_int_t msgid,
 187         LDAPRequest *parentreq,
 188         LDAPURLDesc *srvlist,
 189         LDAPConn *lc,
 190         LDAPreqinfo *bind )
 191 {
 192         LDAPRequest     *lr;
 193         int incparent, rc;
 194
 195         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 196
 197         incparent = 0;
 198         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 199
 200         if ( lc == NULL ) {
 201                 if ( srvlist == NULL ) {
 202                         lc = ld->ld_defconn;
 203                 } else {
 204                         lc = find_connection( ld, srvlist, 1 );
 205                         if ( lc == NULL ) {
 206                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 207                                         /* Remember the bind in the parent */
 208                                         incparent = 1;
 209                                         ++parentreq->lr_outrefcnt;
 210                                 }
 211                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 212                         }
 213                 }
 214         }
 215
 216         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 217                 ber_free( ber, 1 );
 218                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 219                         ld->ld_errno = LDAP_SERVER_DOWN;
 220                 }
 221                 if ( incparent ) {
 222                         /* Forget about the bind */
 223                         --parentreq->lr_outrefcnt;
 224                 }
 225                 return( -1 );
 226         }
 227
 228         use_connection( ld, lc );
 229
 230         /* If we still have an incomplete write, try to finish it before
 231          * dealing with the new request. If we don't finish here, return
 232          * LDAP_BUSY and let the caller retry later. We only allow a single
 233          * request to be in WRITING state.
 234          */
 235         rc = 0;
 236         if ( ld->ld_requests &&
 237                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 238                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
 239         {
 240                 rc = -1;
 241         }
 242         if ( rc ) return rc;
 243
 244         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
 245         if ( lr == NULL ) {
 246                 ld->ld_errno = LDAP_NO_MEMORY;
 247                 ldap_free_connection( ld, lc, 0, 0 );
 248                 ber_free( ber, 1 );
 249                 if ( incparent ) {
 250                         /* Forget about the bind */
 251                         --parentreq->lr_outrefcnt;
 252                 }
 253                 return( -1 );
 254         }
 255         lr->lr_msgid = msgid;
 256         lr->lr_status = LDAP_REQST_INPROGRESS;
 257         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 258         lr->lr_ber = ber;
 259         lr->lr_conn = lc;
 260         if ( parentreq != NULL ) {      /* sub-request */
 261                 if ( !incparent ) {
 262                         /* Increment if we didn't do it before the bind */
 263                         ++parentreq->lr_outrefcnt;
 264                 }
 265                 lr->lr_origid = parentreq->lr_origid;
 266                 lr->lr_parentcnt = ++parentreq->lr_parentcnt;
 267                 lr->lr_parent = parentreq;
 268                 lr->lr_refnext = parentreq->lr_child;
 269                 parentreq->lr_child = lr;
 270         } else {                        /* original request */
 271                 lr->lr_origid = lr->lr_msgid;
 272         }
 273
 274         /* Extract requestDN for future reference */
 275         {
 276                 BerElement tmpber = *ber;
 277                 ber_int_t       bint;
 278                 ber_tag_t       tag, rtag;
 279
 280                 ber_reset( &tmpber, 1 );
 281                 rtag = ber_scanf( &tmpber, "{it", /*}*/ &bint, &tag );
 282                 switch ( tag ) {
 283                 case LDAP_REQ_BIND:
 284                         rtag = ber_scanf( &tmpber, "{i" /*}*/, &bint );
 285                         break;
 286                 case LDAP_REQ_DELETE:
 287                         break;
 288                 default:
 289                         rtag = ber_scanf( &tmpber, "{" /*}*/ );
 290                 case LDAP_REQ_ABANDON:
 291                         break;
 292                 }
 293                 if ( tag != LDAP_REQ_ABANDON ) {
 294                         ber_skip_tag( &tmpber, &lr->lr_dn.bv_len );
 295                         lr->lr_dn.bv_val = tmpber.ber_ptr;
 296                 }
 297         }
 298
 299         lr->lr_prev = NULL;
 300         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 301                 lr->lr_next->lr_prev = lr;
 302         }
 303         ld->ld_requests = lr;
 304
 305         ld->ld_errno = LDAP_SUCCESS;
 306         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 307                 msgid = -1;
 308         }
 309
 310         return( msgid );
 311 }
 312
 313 LDAPConn *
 314 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 315         int connect, LDAPreqinfo *bind )
 316 {
 317         LDAPConn        *lc;
 318         LDAPURLDesc     *srv;
 319
 320         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
 321                 use_ldsb, connect, (bind != NULL) );
 322         /*
 323          * make a new LDAP server connection
 324          * XXX open connection synchronously for now
 325          */
 326         lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
 327         if ( lc == NULL ) {
 328                 ld->ld_errno = LDAP_NO_MEMORY;
 329                 return( NULL );
 330         }
 331
 332         if ( use_ldsb ) {
 333                 assert( ld->ld_sb != NULL );
 334                 lc->lconn_sb = ld->ld_sb;
 335
 336         } else {
 337                 lc->lconn_sb = ber_sockbuf_alloc();
 338                 if ( lc->lconn_sb == NULL ) {
 339                         LDAP_FREE( (char *)lc );
 340                         ld->ld_errno = LDAP_NO_MEMORY;
 341                         return( NULL );
 342                 }
 343         }
 344
 345         if ( connect ) {
 346                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 347                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 )
 348                         {
 349                                 break;
 350                         }
 351                 }
 352
 353                 if ( srv == NULL ) {
 354                         if ( !use_ldsb ) {
 355                                 ber_sockbuf_free( lc->lconn_sb );
 356                         }
 357                         LDAP_FREE( (char *)lc );
 358                         ld->ld_errno = LDAP_SERVER_DOWN;
 359                         return( NULL );
 360                 }
 361
 362                 lc->lconn_server = ldap_url_dup( srv );
 363         }
 364
 365         lc->lconn_status = LDAP_CONNST_CONNECTED;
 366 #ifdef LDAP_R_COMPILE
 367         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 368 #endif
 369         lc->lconn_next = ld->ld_conns;
 370         ld->ld_conns = lc;
 371 #ifdef LDAP_R_COMPILE
 372         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 373 #endif
 374
 375         /*
 376          * XXX for now, we always do a synchronous bind.  This will have
 377          * to change in the long run...
 378          */
 379         if ( bind != NULL) {
 380                 int             err = 0;
 381                 LDAPConn        *savedefconn;
 382
 383                 /* Set flag to prevent additional referrals
 384                  * from being processed on this
 385                  * connection until the bind has completed
 386                  */
 387                 lc->lconn_rebind_inprogress = 1;
 388                 /* V3 rebind function */
 389                 if ( ld->ld_rebind_proc != NULL) {
 390                         LDAPURLDesc     *srvfunc;
 391
 392                         srvfunc = ldap_url_dup( srvlist );
 393                         if ( srvfunc == NULL ) {
 394                                 ld->ld_errno = LDAP_NO_MEMORY;
 395                                 err = -1;
 396                         } else {
 397                                 savedefconn = ld->ld_defconn;
 398                                 ++lc->lconn_refcnt;     /* avoid premature free */
 399                                 ld->ld_defconn = lc;
 400
 401                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 402 #ifdef LDAP_R_COMPILE
 403                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 404                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 405 #endif
 406                                 err = (*ld->ld_rebind_proc)( ld,
 407                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 408                                         ld->ld_rebind_params );
 409 #ifdef LDAP_R_COMPILE
 410                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 411                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 412 #endif
 413
 414                                 ld->ld_defconn = savedefconn;
 415                                 --lc->lconn_refcnt;
 416
 417                                 if ( err != 0 ) {
 418                                         err = -1;
 419                                         ldap_free_connection( ld, lc, 1, 0 );
 420                                         lc = NULL;
 421                                 }
 422                                 ldap_free_urldesc( srvfunc );
 423                         }
 424                 } else {
 425                         savedefconn = ld->ld_defconn;
 426                         ++lc->lconn_refcnt;     /* avoid premature free */
 427                         ld->ld_defconn = lc;
 428
 429                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 430 #ifdef LDAP_R_COMPILE
 431                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 432                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 433 #endif
 434                         if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
 435                                 err = -1;
 436                         }
 437 #ifdef LDAP_R_COMPILE
 438                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 439                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 440 #endif
 441                         ld->ld_defconn = savedefconn;
 442                         --lc->lconn_refcnt;
 443
 444                         if ( err != 0 ) {
 445                                 ldap_free_connection( ld, lc, 1, 0 );
 446                                 lc = NULL;
 447                         }
 448                 }
 449                 if ( lc != NULL )
 450                         lc->lconn_rebind_inprogress = 0;
 451         }
 452
 453         return( lc );
 454 }
 455
 456
 457 static LDAPConn *
 458 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 459 /*
 460  * return an existing connection (if any) to the server srv
 461  * if "any" is non-zero, check for any server in the "srv" chain
 462  */
 463 {
 464         LDAPConn        *lc;
 465         LDAPURLDesc     *lcu, *lsu;
 466         int lcu_port, lsu_port;
 467         int found = 0;
 468
 469 #ifdef LDAP_R_COMPILE
 470         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 471 #endif
 472         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 473                 lcu = lc->lconn_server;
 474                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 475                         lcu->lud_port );
 476
 477                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 478                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 479                                 lsu->lud_port );
 480
 481                         if ( lsu_port == lcu_port
 482                                 && strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 483                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 484                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 485                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0 )
 486                         {
 487                                 found = 1;
 488                                 break;
 489                         }
 490
 491                         if ( !any ) break;
 492                 }
 493                 if ( found )
 494                         break;
 495         }
 496 #ifdef LDAP_R_COMPILE
 497         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 498 #endif
 499         return lc;
 500 }
 501
 502
 503
 504 static void
 505 use_connection( LDAP *ld, LDAPConn *lc )
 506 {
 507         ++lc->lconn_refcnt;
 508         lc->lconn_lastused = time( NULL );
 509 }
 510
 511
 512 void
 513 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 514 {
 515         LDAPConn        *tmplc, *prevlc;
 516
 517         Debug( LDAP_DEBUG_TRACE,
 518                 "ldap_free_connection %d %d\n",
 519                 force, unbind, 0 );
 520
 521         if ( force || --lc->lconn_refcnt <= 0 ) {
 522                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 523                         ldap_mark_select_clear( ld, lc->lconn_sb );
 524                         if ( unbind ) {
 525                                 ldap_send_unbind( ld, lc->lconn_sb,
 526                                                 NULL, NULL );
 527                         }
 528                 }
 529
 530                 if ( lc->lconn_ber != NULL ) {
 531                         ber_free( lc->lconn_ber, 1 );
 532                 }
 533
 534                 ldap_int_sasl_close( ld, lc );
 535
 536                 prevlc = NULL;
 537 #ifdef LDAP_R_COMPILE
 538         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 539 #endif
 540                 for ( tmplc = ld->ld_conns;
 541                         tmplc != NULL;
 542                         tmplc = tmplc->lconn_next )
 543                 {
 544                         if ( tmplc == lc ) {
 545                                 if ( prevlc == NULL ) {
 546                                     ld->ld_conns = tmplc->lconn_next;
 547                                 } else {
 548                                     prevlc->lconn_next = tmplc->lconn_next;
 549                                 }
 550                                 break;
 551                         }
 552                         prevlc = tmplc;
 553                 }
 554 #ifdef LDAP_R_COMPILE
 555         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 556 #endif
 557                 ldap_free_urllist( lc->lconn_server );
 558 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 559                 if ( lc->lconn_krbinstance != NULL ) {
 560                         LDAP_FREE( lc->lconn_krbinstance );
 561                 }
 562 #endif
 563
 564                 /* FIXME: is this at all possible? */
 565                 if ( force ) {
 566                         LDAPRequest     *lr;
 567
 568                         for ( lr = ld->ld_requests; lr; ) {
 569                                 LDAPRequest     *lr_next = lr->lr_next;
 570
 571                                 if ( lr->lr_conn == lc ) {
 572                                         ldap_free_request_int( ld, lr );
 573                                 }
 574
 575                                 lr = lr_next;
 576                         }
 577                 }
 578                 if ( lc->lconn_sb != ld->ld_sb ) {
 579                         ber_sockbuf_free( lc->lconn_sb );
 580                 }
 581                 if ( lc->lconn_rebind_queue != NULL) {
 582                         int i;
 583                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 584                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 585                         }
 586                         LDAP_FREE( lc->lconn_rebind_queue );
 587                 }
 588                 LDAP_FREE( lc );
 589                 Debug( LDAP_DEBUG_TRACE,
 590                         "ldap_free_connection: actually freed\n",
 591                         0, 0, 0 );
 592         } else {
 593                 lc->lconn_lastused = time( NULL );
 594                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 595                                 lc->lconn_refcnt, 0, 0 );
 596         }
 597 }
 598
 599
 600 #ifdef LDAP_DEBUG
 601 void
 602 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 603 {
 604         LDAPConn        *lc;
 605         char            timebuf[32];
 606
 607         fprintf( stderr, "** ld %p Connection%s:\n", (void *)ld, all ? "s" : "" );
 608         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 609                 if ( lc->lconn_server != NULL ) {
 610                         fprintf( stderr, "* host: %s  port: %d%s\n",
 611                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 612                             : lc->lconn_server->lud_host,
 613                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 614                             ld->ld_sb ) ? "  (default)" : "" );
 615                 }
 616                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 617                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 618                     "NeedSocket" : ( lc->lconn_status ==
 619                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 620                 fprintf( stderr, "  last used: %s",
 621                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 622                 if( lc->lconn_rebind_inprogress ) {
 623                         fprintf( stderr, "  rebind in progress\n");
 624                         if( lc->lconn_rebind_queue != NULL) {
 625                                 int i = 0;
 626                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 627                                         int j = 0;
 628                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 629                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 630                                                         i, j, lc->lconn_rebind_queue[i][j]);
 631                                         }
 632                                 }
 633                         } else {
 634                                 fprintf( stderr, "    queue is empty\n");
 635                         }
 636                 }
 637                 fprintf(stderr, "\n");
 638                 if ( !all ) {
 639                         break;
 640                 }
 641         }
 642 }
 643
 644
 645 void
 646 ldap_dump_requests_and_responses( LDAP *ld )
 647 {
 648         LDAPRequest     *lr;
 649         LDAPMessage     *lm, *l;
 650
 651 #ifdef LDAP_R_COMPILE
 652         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 653 #endif
 654         fprintf( stderr, "** ld %p Outstanding Requests:\n", (void *)ld );
 655         if (( lr = ld->ld_requests ) == NULL ) {
 656                 fprintf( stderr, "   Empty\n" );
 657         }
 658         for ( ; lr != NULL; lr = lr->lr_next ) {
 659             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 660                 lr->lr_msgid, lr->lr_origid,
 661                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 662                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 663                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 664                 ( lr->lr_status == LDAP_REQST_WRITING ) ? "Writing" :
 665                 ( lr->lr_status == LDAP_REQST_COMPLETED ) ? "RequestCompleted"
 666                         : "InvalidStatus");
 667             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 668                     lr->lr_outrefcnt, lr->lr_parentcnt );
 669         }
 670 #ifdef LDAP_R_COMPILE
 671         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 672 #endif
 673         fprintf( stderr, "** ld %p Response Queue:\n", (void *)ld );
 674         if (( lm = ld->ld_responses ) == NULL ) {
 675                 fprintf( stderr, "   Empty\n" );
 676         }
 677         for ( ; lm != NULL; lm = lm->lm_next ) {
 678                 fprintf( stderr, " * msgid %d,  type %lu\n",
 679                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 680                 if (( l = lm->lm_chain ) != NULL ) {
 681                         fprintf( stderr, "   chained responses:\n" );
 682                         for ( ; l != NULL; l = l->lm_chain ) {
 683                                 fprintf( stderr,
 684                                     "  * msgid %d,  type %lu\n",
 685                                     l->lm_msgid,
 686                                     (unsigned long) l->lm_msgtype );
 687                         }
 688                 }
 689         }
 690 }
 691 #endif /* LDAP_DEBUG */
 692
 693 static void
 694 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 695 {
 696         if ( lr->lr_prev == NULL ) {
 697                 /* free'ing the first request? */
 698                 assert( ld->ld_requests == lr );
 699                 ld->ld_requests = lr->lr_next;
 700
 701         } else {
 702                 lr->lr_prev->lr_next = lr->lr_next;
 703         }
 704
 705         if ( lr->lr_next != NULL ) {
 706                 lr->lr_next->lr_prev = lr->lr_prev;
 707         }
 708
 709         if ( lr->lr_ber != NULL ) {
 710                 ber_free( lr->lr_ber, 1 );
 711         }
 712
 713         if ( lr->lr_res_error != NULL ) {
 714                 LDAP_FREE( lr->lr_res_error );
 715         }
 716
 717         if ( lr->lr_res_matched != NULL ) {
 718                 LDAP_FREE( lr->lr_res_matched );
 719         }
 720
 721         LDAP_FREE( lr );
 722 }
 723
 724 void
 725 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 726 {
 727         LDAPRequest     **ttmplr;
 728
 729         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 730                 lr->lr_origid, lr->lr_msgid, 0 );
 731
 732         /* free all referrals (child requests) */
 733         while ( lr->lr_child )
 734                 ldap_free_request( ld, lr->lr_child );
 735
 736         if ( lr->lr_parent != NULL ) {
 737                 --lr->lr_parent->lr_outrefcnt;
 738                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 739                 if ( *ttmplr == lr )
 740                         *ttmplr = lr->lr_refnext;
 741         }
 742         ldap_free_request_int( ld, lr );
 743 }
 744
 745 /*
 746  * call first time with *cntp = -1
 747  * when returns *cntp == -1, no referrals are left
 748  *
 749  * NOTE: may replace *refsp, or shuffle the contents
 750  * of the original array.
 751  */
 752 static int ldap_int_nextref(
 753         LDAP                    *ld,
 754         char                    ***refsp,
 755         int                     *cntp,
 756         void                    *params )
 757 {
 758         assert( refsp != NULL );
 759         assert( *refsp != NULL );
 760         assert( cntp != NULL );
 761
 762         if ( *cntp < -1 ) {
 763                 *cntp = -1;
 764                 return -1;
 765         }
 766
 767         (*cntp)++;
 768
 769         if ( (*refsp)[ *cntp ] == NULL ) {
 770                 *cntp = -1;
 771         }
 772
 773         return 0;
 774 }
 775
 776 /*
 777  * Chase v3 referrals
 778  *
 779  * Parameters:
 780  *  (IN) ld = LDAP connection handle
 781  *  (IN) lr = LDAP Request structure
 782  *  (IN) refs = array of pointers to referral strings that we will chase
 783  *              The array will be free'd by this function when no longer needed
 784  *  (IN) sref != 0 if following search reference
 785  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 786  *  (OUT) hadrefp = 1 if sucessfully followed referral
 787  *
 788  * Return value - number of referrals followed
 789  */
 790 int
 791 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 792 {
 793         char            *unfollowed;
 794         int              unfollowedcnt = 0;
 795         LDAPRequest     *origreq;
 796         LDAPURLDesc     *srv = NULL;
 797         BerElement      *ber;
 798         char            **refarray = NULL;
 799         LDAPConn        *lc;
 800         int                      rc, count, i, j, id;
 801         LDAPreqinfo  rinfo;
 802
 803         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 804         *hadrefp = 0;
 805
 806         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 807
 808         unfollowed = NULL;
 809         rc = count = 0;
 810
 811         /* If no referrals in array, return */
 812         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 813                 rc = 0;
 814                 goto done;
 815         }
 816
 817         /* Check for hop limit exceeded */
 818         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 819                 Debug( LDAP_DEBUG_ANY,
 820                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 821                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 822             rc = -1;
 823                 goto done;
 824         }
 825
 826         /* find original request */
 827         for ( origreq = lr;
 828                 origreq->lr_parent != NULL;
 829                 origreq = origreq->lr_parent )
 830         {
 831                 /* empty */ ;
 832         }
 833
 834         refarray = refs;
 835         refs = NULL;
 836
 837         if ( ld->ld_nextref_proc == NULL ) {
 838                 ld->ld_nextref_proc = ldap_int_nextref;
 839         }
 840
 841         /* parse out & follow referrals */
 842         i = -1;
 843         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 844                         i != -1;
 845                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 846         {
 847
 848                 /* Parse the referral URL */
 849                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 850                         ld->ld_errno = rc;
 851                         rc = -1;
 852                         goto done;
 853                 }
 854
 855                 if( srv->lud_crit_exts ) {
 856                         /* we do not support any extensions */
 857                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 858                         rc = -1;
 859                         goto done;
 860                 }
 861
 862                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 863                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 864                         LDAP_FREE( srv->lud_dn );
 865                         srv->lud_dn = NULL;
 866                 }
 867
 868                 /* check connection for re-bind in progress */
 869                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 870                         /* See if we've already requested this DN with this conn */
 871                         LDAPRequest *lp;
 872                         int looped = 0;
 873                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
 874                         for (lp = origreq; lp; ) {
 875                                 if ( lp->lr_conn == lc ) {
 876                                         if ( len == lp->lr_dn.bv_len ) {
 877                                                 if ( len && strncmp( srv->lud_dn, lp->lr_dn.bv_val,
 878                                                         len ))
 879                                                         continue;
 880                                                 looped = 1;
 881                                                 break;
 882                                         }
 883                                 }
 884                                 if ( lp == origreq )
 885                                         lp = lp->lr_child;
 886                                 else
 887                                         lp = lr->lr_refnext;
 888                         }
 889                         if ( looped ) {
 890                                 ldap_free_urllist( srv );
 891                                 srv = NULL;
 892                                 ld->ld_errno = LDAP_CLIENT_LOOP;
 893                                 rc = -1;
 894                                 continue;
 895                         }
 896
 897                         if( lc->lconn_rebind_inprogress) {
 898                                 /* We are already chasing a referral or search reference and a
 899                                  * bind on that connection is in progress.  We must queue
 900                                  * referrals on that connection, so we don't get a request
 901                                  * going out before the bind operation completes. This happens
 902                                  * if two search references come in one behind the other
 903                                  * for the same server with different contexts.
 904                                  */
 905                                 Debug( LDAP_DEBUG_TRACE,
 906                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 907                                         refarray[i], 0, 0);
 908                                 if( lc->lconn_rebind_queue == NULL ) {
 909                                         /* Create a referral list */
 910                                         lc->lconn_rebind_queue =
 911                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 912
 913                                         if( lc->lconn_rebind_queue == NULL) {
 914                                                 ld->ld_errno = LDAP_NO_MEMORY;
 915                                                 rc = -1;
 916                                                 goto done;
 917                                         }
 918
 919                                         lc->lconn_rebind_queue[0] = refarray;
 920                                         lc->lconn_rebind_queue[1] = NULL;
 921                                         refarray = NULL;
 922
 923                                 } else {
 924                                         /* Count how many referral arrays we already have */
 925                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 926                                                 /* empty */;
 927                                         }
 928
 929                                         /* Add the new referral to the list */
 930                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 931                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 932
 933                                         if( lc->lconn_rebind_queue == NULL ) {
 934                                                 ld->ld_errno = LDAP_NO_MEMORY;
 935                                                 rc = -1;
 936                                                 goto done;
 937                                         }
 938                                         lc->lconn_rebind_queue[j] = refarray;
 939                                         lc->lconn_rebind_queue[j+1] = NULL;
 940                                         refarray = NULL;
 941                                 }
 942
 943                                 /* We have queued the referral/reference, now just return */
 944                                 rc = 0;
 945                                 *hadrefp = 1;
 946                                 count = 1; /* Pretend we already followed referral */
 947                                 goto done;
 948                         }
 949                 }
 950                 /* Re-encode the request with the new starting point of the search.
 951                  * Note: In the future we also need to replace the filter if one
 952                  * was provided with the search reference
 953                  */
 954
 955                 /* For references we don't want old dn if new dn empty */
 956                 if ( sref && srv->lud_dn == NULL ) {
 957                         srv->lud_dn = LDAP_STRDUP( "" );
 958                 }
 959
 960                 LDAP_NEXT_MSGID( ld, id );
 961                 ber = re_encode_request( ld, origreq->lr_ber, id,
 962                         sref, srv, &rinfo.ri_request );
 963
 964                 if( ber == NULL ) {
 965                         ld->ld_errno = LDAP_ENCODING_ERROR;
 966                         rc = -1;
 967                         goto done;
 968                 }
 969
 970                 Debug( LDAP_DEBUG_TRACE,
 971                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
 972                         lr->lr_msgid, refarray[i], 0);
 973
 974                 /* Send the new request to the server - may require a bind */
 975                 rinfo.ri_msgid = origreq->lr_origid;
 976                 rinfo.ri_url = refarray[i];
 977 #ifdef LDAP_R_COMPILE
 978                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 979 #endif
 980                 rc = ldap_send_server_request( ld, ber, id,
 981                         origreq, srv, NULL, &rinfo );
 982 #ifdef LDAP_R_COMPILE
 983                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 984 #endif
 985                 if ( rc < 0 ) {
 986                         /* Failure, try next referral in the list */
 987                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%d: %s)\n",
 988                                 refarray[i], ld->ld_errno, ldap_err2string( ld->ld_errno ) );
 989                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i] );
 990                         ldap_free_urllist( srv );
 991                         srv = NULL;
 992                         ld->ld_errno = LDAP_REFERRAL;
 993                 } else {
 994                         /* Success, no need to try this referral list further */
 995                         rc = 0;
 996                         ++count;
 997                         *hadrefp = 1;
 998
 999                         /* check if there is a queue of referrals that came in during bind */
1000                         if ( lc == NULL) {
1001                                 lc = find_connection( ld, srv, 1 );
1002                                 if ( lc == NULL ) {
1003                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
1004                                         rc = -1;
1005                                         goto done;
1006                                 }
1007                         }
1008
1009                         if ( lc->lconn_rebind_queue != NULL ) {
1010                                 /* Release resources of previous list */
1011                                 LDAP_VFREE( refarray );
1012                                 refarray = NULL;
1013                                 ldap_free_urllist( srv );
1014                                 srv = NULL;
1015
1016                                 /* Pull entries off end of queue so list always null terminated */
1017                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++ )
1018                                         ;
1019                                 refarray = lc->lconn_rebind_queue[j - 1];
1020                                 lc->lconn_rebind_queue[j-1] = NULL;
1021                                 /* we pulled off last entry from queue, free queue */
1022                                 if ( j == 1 ) {
1023                                         LDAP_FREE( lc->lconn_rebind_queue );
1024                                         lc->lconn_rebind_queue = NULL;
1025                                 }
1026                                 /* restart the loop the with new referral list */
1027                                 i = -1;
1028                                 continue;
1029                         }
1030                         break; /* referral followed, break out of for loop */
1031                 }
1032         } /* end for loop */
1033 done:
1034         LDAP_VFREE( refarray );
1035         ldap_free_urllist( srv );
1036         LDAP_FREE( *errstrp );
1037
1038         if( rc == 0 ) {
1039                 *errstrp = NULL;
1040                 LDAP_FREE( unfollowed );
1041                 return count;
1042         } else {
1043                 *errstrp = unfollowed;
1044                 return rc;
1045         }
1046 }
1047
1048 /*
1049  * XXX merging of errors in this routine needs to be improved
1050  */
1051 int
1052 ldap_chase_referrals( LDAP *ld,
1053         LDAPRequest *lr,
1054         char **errstrp,
1055         int sref,
1056         int *hadrefp )
1057 {
1058         int             rc, count, id;
1059         unsigned        len;
1060         char            *p, *ref, *unfollowed;
1061         LDAPRequest     *origreq;
1062         LDAPURLDesc     *srv;
1063         BerElement      *ber;
1064         LDAPreqinfo  rinfo;
1065         LDAPConn        *lc;
1066
1067         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
1068
1069         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
1070         *hadrefp = 0;
1071
1072         if ( *errstrp == NULL ) {
1073                 return( 0 );
1074         }
1075
1076         len = strlen( *errstrp );
1077         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1078                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1079                         *p = '\0';
1080                         p += LDAP_REF_STR_LEN;
1081                         break;
1082                 }
1083         }
1084
1085         if ( len < LDAP_REF_STR_LEN ) {
1086                 return( 0 );
1087         }
1088
1089         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1090                 Debug( LDAP_DEBUG_ANY,
1091                     "more than %d referral hops (dropping)\n",
1092                     ld->ld_refhoplimit, 0, 0 );
1093                     /* XXX report as error in ld->ld_errno? */
1094                     return( 0 );
1095         }
1096
1097         /* find original request */
1098         for ( origreq = lr; origreq->lr_parent != NULL;
1099              origreq = origreq->lr_parent ) {
1100                 /* empty */;
1101         }
1102
1103         unfollowed = NULL;
1104         rc = count = 0;
1105
1106         /* parse out & follow referrals */
1107         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1108                 p = strchr( ref, '\n' );
1109                 if ( p != NULL ) {
1110                         *p++ = '\0';
1111                 }
1112
1113                 rc = ldap_url_parse_ext( ref, &srv );
1114
1115                 if ( rc != LDAP_URL_SUCCESS ) {
1116                         Debug( LDAP_DEBUG_TRACE,
1117                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1118                         rc = ldap_append_referral( ld, &unfollowed, ref );
1119                         *hadrefp = 1;
1120                         continue;
1121                 }
1122
1123                 if ( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1124                         LDAP_FREE( srv->lud_dn );
1125                         srv->lud_dn = NULL;
1126                 }
1127
1128                 Debug( LDAP_DEBUG_TRACE,
1129                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1130
1131                 *hadrefp = 1;
1132
1133                 /* See if we've already been here */
1134                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
1135                         LDAPRequest *lp;
1136                         int looped = 0;
1137                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
1138                         for (lp = lr; lp; lp = lp->lr_parent ) {
1139                                 if ( lp->lr_conn == lc ) {
1140                                         if ( len == lp->lr_dn.bv_len ) {
1141                                                 if ( len && strncmp( srv->lud_dn, lp->lr_dn.bv_val,
1142                                                         len ))
1143                                                         continue;
1144                                                 looped = 1;
1145                                                 break;
1146                                         }
1147                                 }
1148                         }
1149                         if ( looped ) {
1150                                 ldap_free_urllist(srv);
1151                                 ld->ld_errno = LDAP_CLIENT_LOOP;
1152                                 rc = -1;
1153                                 continue;
1154                         }
1155                 }
1156
1157                 LDAP_NEXT_MSGID( ld, id );
1158                 ber = re_encode_request( ld, origreq->lr_ber,
1159                     id, sref, srv, &rinfo.ri_request );
1160
1161                 if ( ber == NULL ) {
1162                         return -1 ;
1163                 }
1164
1165                 /* copy the complete referral for rebind process */
1166                 rinfo.ri_url = LDAP_STRDUP( ref );
1167
1168                 rinfo.ri_msgid = origreq->lr_origid;
1169
1170 #ifdef LDAP_R_COMPILE
1171                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1172 #endif
1173                 rc = ldap_send_server_request( ld, ber, id,
1174                         lr, srv, NULL, &rinfo );
1175 #ifdef LDAP_R_COMPILE
1176                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1177 #endif
1178
1179                 LDAP_FREE( rinfo.ri_url );
1180
1181                 if( rc >= 0 ) {
1182                         ++count;
1183                 } else {
1184                         Debug( LDAP_DEBUG_ANY,
1185                                 "Unable to chase referral \"%s\" (%d: %s)\n",
1186                                 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1187                         rc = ldap_append_referral( ld, &unfollowed, ref );
1188                 }
1189
1190                 ldap_free_urllist(srv);
1191         }
1192
1193         LDAP_FREE( *errstrp );
1194         *errstrp = unfollowed;
1195
1196         return(( rc == 0 ) ? count : rc );
1197 }
1198
1199
1200 int
1201 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1202 {
1203         int     first;
1204
1205         if ( *referralsp == NULL ) {
1206                 first = 1;
1207                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1208                     + 1 );
1209         } else {
1210                 first = 0;
1211                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1212                     strlen( *referralsp ) + strlen( s ) + 2 );
1213         }
1214
1215         if ( *referralsp == NULL ) {
1216                 ld->ld_errno = LDAP_NO_MEMORY;
1217                 return( -1 );
1218         }
1219
1220         if ( first ) {
1221                 strcpy( *referralsp, LDAP_REF_STR );
1222         } else {
1223                 strcat( *referralsp, "\n" );
1224         }
1225         strcat( *referralsp, s );
1226
1227         return( 0 );
1228 }
1229
1230
1231
1232 static BerElement *
1233 re_encode_request( LDAP *ld,
1234         BerElement *origber,
1235         ber_int_t msgid,
1236         int sref,
1237         LDAPURLDesc *srv,
1238         int *type )
1239 {
1240         /*
1241          * XXX this routine knows way too much about how the lber library works!
1242          */
1243         ber_int_t       along;
1244         ber_tag_t       tag;
1245         ber_tag_t       rtag;
1246         ber_int_t       ver;
1247         ber_int_t       scope;
1248         int             rc;
1249         BerElement      tmpber, *ber;
1250         struct berval           orig_dn;
1251         char            *dn;
1252
1253         Debug( LDAP_DEBUG_TRACE,
1254             "re_encode_request: new msgid %ld, new dn <%s>\n",
1255             (long) msgid,
1256                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1257
1258         tmpber = *origber;
1259
1260         /*
1261          * all LDAP requests are sequences that start with a message id.
1262          * For all except delete, this is followed by a sequence that is
1263          * tagged with the operation code.  For delete, the provided DN
1264          * is not wrapped by a sequence.
1265          */
1266         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1267
1268         if ( rtag == LBER_ERROR ) {
1269                 ld->ld_errno = LDAP_DECODING_ERROR;
1270                 return( NULL );
1271         }
1272
1273         assert( tag != 0);
1274         if ( tag == LDAP_REQ_BIND ) {
1275                 /* bind requests have a version number before the DN & other stuff */
1276                 rtag = ber_scanf( &tmpber, "{im" /*}*/, &ver, &orig_dn );
1277
1278         } else if ( tag == LDAP_REQ_DELETE ) {
1279                 /* delete requests don't have a DN wrapping sequence */
1280                 rtag = ber_scanf( &tmpber, "m", &orig_dn );
1281
1282         } else if ( tag == LDAP_REQ_SEARCH ) {
1283                 /* search requests need to be re-scope-ed */
1284                 rtag = ber_scanf( &tmpber, "{me" /*"}"*/, &orig_dn, &scope );
1285
1286                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1287                         /* use the scope provided in reference */
1288                         scope = srv->lud_scope;
1289
1290                 } else if ( sref ) {
1291                         /* use scope implied by previous operation
1292                          *   base -> base
1293                          *   one -> base
1294                          *   subtree -> subtree
1295                          *   subordinate -> subtree
1296                          */
1297                         switch( scope ) {
1298                         default:
1299                         case LDAP_SCOPE_BASE:
1300                         case LDAP_SCOPE_ONELEVEL:
1301                                 scope = LDAP_SCOPE_BASE;
1302                                 break;
1303                         case LDAP_SCOPE_SUBTREE:
1304                         case LDAP_SCOPE_SUBORDINATE:
1305                                 scope = LDAP_SCOPE_SUBTREE;
1306                                 break;
1307                         }
1308                 }
1309
1310         } else {
1311                 rtag = ber_scanf( &tmpber, "{m" /*}*/, &orig_dn );
1312         }
1313
1314         if( rtag == LBER_ERROR ) {
1315                 ld->ld_errno = LDAP_DECODING_ERROR;
1316                 return NULL;
1317         }
1318
1319         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1320                 return NULL;
1321         }
1322
1323         if ( srv->lud_dn == NULL ) {
1324                 dn = orig_dn.bv_val;
1325         } else {
1326                 dn = srv->lud_dn;
1327         }
1328
1329         if ( tag == LDAP_REQ_BIND ) {
1330                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1331         } else if ( tag == LDAP_REQ_DELETE ) {
1332                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1333         } else if ( tag == LDAP_REQ_SEARCH ) {
1334                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1335         } else {
1336                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1337         }
1338
1339         if ( rc == -1 ) {
1340                 ld->ld_errno = LDAP_ENCODING_ERROR;
1341                 ber_free( ber, 1 );
1342                 return NULL;
1343         }
1344
1345         if ( tag != LDAP_REQ_DELETE && (
1346                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1347                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1348             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1349         {
1350                 ld->ld_errno = LDAP_ENCODING_ERROR;
1351                 ber_free( ber, 1 );
1352                 return NULL;
1353         }
1354
1355 #ifdef LDAP_DEBUG
1356         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1357                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1358                     0, 0, 0 );
1359                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1360         }
1361 #endif /* LDAP_DEBUG */
1362
1363         *type = tag;    /* return request type */
1364         return ber;
1365 }
1366
1367
1368 LDAPRequest *
1369 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1370 {
1371         LDAPRequest     *lr;
1372
1373 #ifdef LDAP_R_COMPILE
1374         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1375 #endif
1376         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1377                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1378                         continue;       /* Skip completed requests */
1379                 }
1380                 if ( msgid == lr->lr_msgid ) {
1381                         break;
1382                 }
1383         }
1384 #ifdef LDAP_R_COMPILE
1385         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1386 #endif
1387
1388         return( lr );
1389 }
1390
1391