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         int rc = 1;
  97
  98         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
  99
 100 #ifdef LDAP_R_COMPILE
 101         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 102 #endif
 103         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 104                 /* not connected yet */
 105                 rc = ldap_open_defconn( ld );
 106
 107         }
 108 #ifdef LDAP_R_COMPILE
 109         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 110 #endif
 111         if( rc < 0 ) {
 112                 ber_free( ber, 1 );
 113                 return( -1 );
 114         } else if ( rc == 0 ) {
 115                 Debug( LDAP_DEBUG_TRACE,
 116                         "ldap_open_defconn: successful\n",
 117                         0, 0, 0 );
 118         }
 119
 120 #ifdef LDAP_CONNECTIONLESS
 121         if (LDAP_IS_UDP(ld)) {
 122                 if (msgtype == LDAP_REQ_BIND) {
 123                         if (ld->ld_options.ldo_cldapdn)
 124                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 125                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 126                         return 0;
 127                 }
 128                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 129                         return LDAP_PARAM_ERROR;
 130         }
 131 #endif
 132 #ifdef LDAP_R_COMPILE
 133         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 134 #endif
 135         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 136                 NULL, NULL, NULL );
 137 #ifdef LDAP_R_COMPILE
 138         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 139 #endif
 140         return(rc);
 141 }
 142
 143
 144 int
 145 ldap_int_flush_request(
 146         LDAP *ld,
 147         LDAPRequest *lr )
 148 {
 149         LDAPConn *lc = lr->lr_conn;
 150
 151         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 152                 if ( errno == EAGAIN ) {
 153                         /* need to continue write later */
 154                         lr->lr_status = LDAP_REQST_WRITING;
 155                         ldap_mark_select_write( ld, lc->lconn_sb );
 156                         ld->ld_errno = LDAP_BUSY;
 157                         return -2;
 158                 } else {
 159                         ld->ld_errno = LDAP_SERVER_DOWN;
 160                         ldap_free_request( ld, lr );
 161                         ldap_free_connection( ld, lc, 0, 0 );
 162                         return( -1 );
 163                 }
 164         } else {
 165                 if ( lr->lr_parent == NULL ) {
 166                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 167                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 168                 }
 169                 lr->lr_status = LDAP_REQST_INPROGRESS;
 170
 171                 /* sent -- waiting for a response */
 172                 ldap_mark_select_read( ld, lc->lconn_sb );
 173         }
 174         return 0;
 175 }
 176
 177 int
 178 ldap_send_server_request(
 179         LDAP *ld,
 180         BerElement *ber,
 181         ber_int_t msgid,
 182         LDAPRequest *parentreq,
 183         LDAPURLDesc *srvlist,
 184         LDAPConn *lc,
 185         LDAPreqinfo *bind )
 186 {
 187         LDAPRequest     *lr;
 188         int incparent, rc;
 189
 190         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 191
 192         incparent = 0;
 193         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 194
 195         if ( lc == NULL ) {
 196                 if ( srvlist == NULL ) {
 197                         lc = ld->ld_defconn;
 198                 } else {
 199                         lc = find_connection( ld, srvlist, 1 );
 200                         if ( lc == NULL ) {
 201                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 202                                         /* Remember the bind in the parent */
 203                                         incparent = 1;
 204                                         ++parentreq->lr_outrefcnt;
 205                                 }
 206                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 207                         }
 208                 }
 209         }
 210
 211         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 212                 ber_free( ber, 1 );
 213                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 214                         ld->ld_errno = LDAP_SERVER_DOWN;
 215                 }
 216                 if ( incparent ) {
 217                         /* Forget about the bind */
 218                         --parentreq->lr_outrefcnt;
 219                 }
 220                 return( -1 );
 221         }
 222
 223         use_connection( ld, lc );
 224
 225         /* If we still have an incomplete write, try to finish it before
 226          * dealing with the new request. If we don't finish here, return
 227          * LDAP_BUSY and let the caller retry later. We only allow a single
 228          * request to be in WRITING state.
 229          */
 230         rc = 0;
 231         if ( ld->ld_requests &&
 232                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 233                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
 234         {
 235                 rc = -1;
 236         }
 237         if ( rc ) return rc;
 238
 239         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
 240         if ( lr == NULL ) {
 241                 ld->ld_errno = LDAP_NO_MEMORY;
 242                 ldap_free_connection( ld, lc, 0, 0 );
 243                 ber_free( ber, 1 );
 244                 if ( incparent ) {
 245                         /* Forget about the bind */
 246                         --parentreq->lr_outrefcnt;
 247                 }
 248                 return( -1 );
 249         }
 250         lr->lr_msgid = msgid;
 251         lr->lr_status = LDAP_REQST_INPROGRESS;
 252         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 253         lr->lr_ber = ber;
 254         lr->lr_conn = lc;
 255         if ( parentreq != NULL ) {      /* sub-request */
 256                 if ( !incparent ) {
 257                         /* Increment if we didn't do it before the bind */
 258                         ++parentreq->lr_outrefcnt;
 259                 }
 260                 lr->lr_origid = parentreq->lr_origid;
 261                 lr->lr_parentcnt = ++parentreq->lr_parentcnt;
 262                 lr->lr_parent = parentreq;
 263                 lr->lr_refnext = parentreq->lr_child;
 264                 parentreq->lr_child = lr;
 265         } else {                        /* original request */
 266                 lr->lr_origid = lr->lr_msgid;
 267         }
 268
 269         /* Extract requestDN for future reference */
 270         {
 271                 BerElement tmpber = *ber;
 272                 ber_int_t       bint;
 273                 ber_tag_t       tag, rtag;
 274
 275                 ber_reset( &tmpber, 1 );
 276                 rtag = ber_scanf( &tmpber, "{it", /*}*/ &bint, &tag );
 277                 switch ( tag ) {
 278                 case LDAP_REQ_BIND:
 279                         rtag = ber_scanf( &tmpber, "{i" /*}*/, &bint );
 280                         break;
 281                 case LDAP_REQ_DELETE:
 282                         break;
 283                 default:
 284                         rtag = ber_scanf( &tmpber, "{" /*}*/ );
 285                 case LDAP_REQ_ABANDON:
 286                         break;
 287                 }
 288                 if ( tag != LDAP_REQ_ABANDON ) {
 289                         ber_skip_tag( &tmpber, &lr->lr_dn.bv_len );
 290                         lr->lr_dn.bv_val = tmpber.ber_ptr;
 291                 }
 292         }
 293
 294         lr->lr_prev = NULL;
 295         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 296                 lr->lr_next->lr_prev = lr;
 297         }
 298         ld->ld_requests = lr;
 299
 300         ld->ld_errno = LDAP_SUCCESS;
 301         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 302                 msgid = -1;
 303         }
 304
 305         return( msgid );
 306 }
 307
 308 LDAPConn *
 309 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 310         int connect, LDAPreqinfo *bind )
 311 {
 312         LDAPConn        *lc;
 313         LDAPURLDesc     *srv;
 314
 315         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
 316                 use_ldsb, connect, (bind != NULL) );
 317         /*
 318          * make a new LDAP server connection
 319          * XXX open connection synchronously for now
 320          */
 321         lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
 322         if ( lc == NULL ) {
 323                 ld->ld_errno = LDAP_NO_MEMORY;
 324                 return( NULL );
 325         }
 326
 327         if ( use_ldsb ) {
 328                 assert( ld->ld_sb != NULL );
 329                 lc->lconn_sb = ld->ld_sb;
 330
 331         } else {
 332                 lc->lconn_sb = ber_sockbuf_alloc();
 333                 if ( lc->lconn_sb == NULL ) {
 334                         LDAP_FREE( (char *)lc );
 335                         ld->ld_errno = LDAP_NO_MEMORY;
 336                         return( NULL );
 337                 }
 338         }
 339
 340         if ( connect ) {
 341                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 342                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 )
 343                         {
 344                                 break;
 345                         }
 346                 }
 347
 348                 if ( srv == NULL ) {
 349                         if ( !use_ldsb ) {
 350                                 ber_sockbuf_free( lc->lconn_sb );
 351                         }
 352                         LDAP_FREE( (char *)lc );
 353                         ld->ld_errno = LDAP_SERVER_DOWN;
 354                         return( NULL );
 355                 }
 356
 357                 lc->lconn_server = ldap_url_dup( srv );
 358         }
 359
 360         lc->lconn_status = LDAP_CONNST_CONNECTED;
 361 #ifdef LDAP_R_COMPILE
 362         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 363 #endif
 364         lc->lconn_next = ld->ld_conns;
 365         ld->ld_conns = lc;
 366 #ifdef LDAP_R_COMPILE
 367         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 368 #endif
 369
 370         /*
 371          * XXX for now, we always do a synchronous bind.  This will have
 372          * to change in the long run...
 373          */
 374         if ( bind != NULL) {
 375                 int             err = 0;
 376                 LDAPConn        *savedefconn;
 377
 378                 /* Set flag to prevent additional referrals
 379                  * from being processed on this
 380                  * connection until the bind has completed
 381                  */
 382                 lc->lconn_rebind_inprogress = 1;
 383                 /* V3 rebind function */
 384                 if ( ld->ld_rebind_proc != NULL) {
 385                         LDAPURLDesc     *srvfunc;
 386
 387                         srvfunc = ldap_url_dup( srvlist );
 388                         if ( srvfunc == NULL ) {
 389                                 ld->ld_errno = LDAP_NO_MEMORY;
 390                                 err = -1;
 391                         } else {
 392                                 savedefconn = ld->ld_defconn;
 393                                 ++lc->lconn_refcnt;     /* avoid premature free */
 394                                 ld->ld_defconn = lc;
 395
 396                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 397 #ifdef LDAP_R_COMPILE
 398                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 399                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 400 #endif
 401                                 err = (*ld->ld_rebind_proc)( ld,
 402                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 403                                         ld->ld_rebind_params );
 404 #ifdef LDAP_R_COMPILE
 405                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 406                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 407 #endif
 408
 409                                 ld->ld_defconn = savedefconn;
 410                                 --lc->lconn_refcnt;
 411
 412                                 if ( err != 0 ) {
 413                                         err = -1;
 414                                         ldap_free_connection( ld, lc, 1, 0 );
 415                                         lc = NULL;
 416                                 }
 417                                 ldap_free_urldesc( srvfunc );
 418                         }
 419                 } else {
 420                         int             msgid, rc;
 421                         struct berval   passwd = BER_BVNULL;
 422
 423                         savedefconn = ld->ld_defconn;
 424                         ++lc->lconn_refcnt;     /* avoid premature free */
 425                         ld->ld_defconn = lc;
 426
 427                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 428 #ifdef LDAP_R_COMPILE
 429                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 430                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 431 #endif
 432                         rc = ldap_sasl_bind( ld, "", LDAP_SASL_SIMPLE, &passwd,
 433                                 NULL, NULL, &msgid );
 434                         if ( rc != LDAP_SUCCESS ) {
 435                                 err = -1;
 436
 437                         } else {
 438                                 for ( err = 1; err > 0; ) {
 439                                         struct timeval  tv = { 0, 100000 };
 440                                         LDAPMessage     *res = NULL;
 441
 442                                         switch ( ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 443                                         case -1:
 444                                                 err = -1;
 445                                                 break;
 446
 447                                         case 0:
 448 #ifdef LDAP_R_COMPILE
 449                                                 ldap_pvt_thread_yield();
 450 #endif
 451                                                 break;
 452
 453                                         case LDAP_RES_BIND:
 454                                                 rc = ldap_parse_result( ld, res, &err, NULL, NULL, NULL, NULL, 1 );
 455                                                 if ( rc != LDAP_SUCCESS ) {
 456                                                         err = -1;
 457
 458                                                 } else if ( err != LDAP_SUCCESS ) {
 459                                                         err = -1;
 460                                                 }
 461                                                 /* else err == LDAP_SUCCESS == 0 */
 462                                                 break;
 463
 464                                         default:
 465                                                 assert( 0 );
 466                                         }
 467                                 }
 468                         }
 469 #ifdef LDAP_R_COMPILE
 470                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 471                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 472 #endif
 473                         ld->ld_defconn = savedefconn;
 474                         --lc->lconn_refcnt;
 475
 476                         if ( err != 0 ) {
 477                                 ldap_free_connection( ld, lc, 1, 0 );
 478                                 lc = NULL;
 479                         }
 480                 }
 481                 if ( lc != NULL )
 482                         lc->lconn_rebind_inprogress = 0;
 483         }
 484
 485         return( lc );
 486 }
 487
 488
 489 static LDAPConn *
 490 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 491 /*
 492  * return an existing connection (if any) to the server srv
 493  * if "any" is non-zero, check for any server in the "srv" chain
 494  */
 495 {
 496         LDAPConn        *lc;
 497         LDAPURLDesc     *lcu, *lsu;
 498         int lcu_port, lsu_port;
 499         int found = 0;
 500
 501 #ifdef LDAP_R_COMPILE
 502         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 503 #endif
 504         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 505                 lcu = lc->lconn_server;
 506                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 507                         lcu->lud_port );
 508
 509                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 510                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 511                                 lsu->lud_port );
 512
 513                         if ( lsu_port == lcu_port
 514                                 && strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 515                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 516                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 517                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0 )
 518                         {
 519                                 found = 1;
 520                                 break;
 521                         }
 522
 523                         if ( !any ) break;
 524                 }
 525                 if ( found )
 526                         break;
 527         }
 528 #ifdef LDAP_R_COMPILE
 529         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 530 #endif
 531         return lc;
 532 }
 533
 534
 535
 536 static void
 537 use_connection( LDAP *ld, LDAPConn *lc )
 538 {
 539         ++lc->lconn_refcnt;
 540         lc->lconn_lastused = time( NULL );
 541 }
 542
 543
 544 void
 545 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 546 {
 547         LDAPConn        *tmplc, *prevlc;
 548
 549         Debug( LDAP_DEBUG_TRACE,
 550                 "ldap_free_connection %d %d\n",
 551                 force, unbind, 0 );
 552
 553         if ( force || --lc->lconn_refcnt <= 0 ) {
 554                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 555                         ldap_mark_select_clear( ld, lc->lconn_sb );
 556                         if ( unbind ) {
 557                                 ldap_send_unbind( ld, lc->lconn_sb,
 558                                                 NULL, NULL );
 559                         }
 560                 }
 561
 562                 if ( lc->lconn_ber != NULL ) {
 563                         ber_free( lc->lconn_ber, 1 );
 564                 }
 565
 566                 ldap_int_sasl_close( ld, lc );
 567
 568                 prevlc = NULL;
 569 #ifdef LDAP_R_COMPILE
 570         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 571 #endif
 572                 for ( tmplc = ld->ld_conns;
 573                         tmplc != NULL;
 574                         tmplc = tmplc->lconn_next )
 575                 {
 576                         if ( tmplc == lc ) {
 577                                 if ( prevlc == NULL ) {
 578                                     ld->ld_conns = tmplc->lconn_next;
 579                                 } else {
 580                                     prevlc->lconn_next = tmplc->lconn_next;
 581                                 }
 582                                 break;
 583                         }
 584                         prevlc = tmplc;
 585                 }
 586 #ifdef LDAP_R_COMPILE
 587         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 588 #endif
 589                 ldap_free_urllist( lc->lconn_server );
 590 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 591                 if ( lc->lconn_krbinstance != NULL ) {
 592                         LDAP_FREE( lc->lconn_krbinstance );
 593                 }
 594 #endif
 595
 596                 /* FIXME: is this at all possible? */
 597                 if ( force ) {
 598                         LDAPRequest     *lr;
 599
 600                         for ( lr = ld->ld_requests; lr; ) {
 601                                 LDAPRequest     *lr_next = lr->lr_next;
 602
 603                                 if ( lr->lr_conn == lc ) {
 604                                         ldap_free_request_int( ld, lr );
 605                                 }
 606
 607                                 lr = lr_next;
 608                         }
 609                 }
 610                 if ( lc->lconn_sb != ld->ld_sb ) {
 611                         ber_sockbuf_free( lc->lconn_sb );
 612                 }
 613                 if ( lc->lconn_rebind_queue != NULL) {
 614                         int i;
 615                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 616                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 617                         }
 618                         LDAP_FREE( lc->lconn_rebind_queue );
 619                 }
 620                 LDAP_FREE( lc );
 621                 Debug( LDAP_DEBUG_TRACE,
 622                         "ldap_free_connection: actually freed\n",
 623                         0, 0, 0 );
 624         } else {
 625                 lc->lconn_lastused = time( NULL );
 626                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 627                                 lc->lconn_refcnt, 0, 0 );
 628         }
 629 }
 630
 631
 632 #ifdef LDAP_DEBUG
 633 void
 634 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 635 {
 636         LDAPConn        *lc;
 637         char            timebuf[32];
 638
 639         fprintf( stderr, "** ld %p Connection%s:\n", (void *)ld, all ? "s" : "" );
 640         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 641                 if ( lc->lconn_server != NULL ) {
 642                         fprintf( stderr, "* host: %s  port: %d%s\n",
 643                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 644                             : lc->lconn_server->lud_host,
 645                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 646                             ld->ld_sb ) ? "  (default)" : "" );
 647                 }
 648                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 649                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 650                     "NeedSocket" : ( lc->lconn_status ==
 651                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 652                 fprintf( stderr, "  last used: %s",
 653                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 654                 if( lc->lconn_rebind_inprogress ) {
 655                         fprintf( stderr, "  rebind in progress\n");
 656                         if( lc->lconn_rebind_queue != NULL) {
 657                                 int i = 0;
 658                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 659                                         int j = 0;
 660                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 661                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 662                                                         i, j, lc->lconn_rebind_queue[i][j]);
 663                                         }
 664                                 }
 665                         } else {
 666                                 fprintf( stderr, "    queue is empty\n");
 667                         }
 668                 }
 669                 fprintf(stderr, "\n");
 670                 if ( !all ) {
 671                         break;
 672                 }
 673         }
 674 }
 675
 676
 677 void
 678 ldap_dump_requests_and_responses( LDAP *ld )
 679 {
 680         LDAPRequest     *lr;
 681         LDAPMessage     *lm, *l;
 682
 683 #ifdef LDAP_R_COMPILE
 684         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 685 #endif
 686         fprintf( stderr, "** ld %p Outstanding Requests:\n", (void *)ld );
 687         if (( lr = ld->ld_requests ) == NULL ) {
 688                 fprintf( stderr, "   Empty\n" );
 689         }
 690         for ( ; lr != NULL; lr = lr->lr_next ) {
 691             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 692                 lr->lr_msgid, lr->lr_origid,
 693                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 694                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 695                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 696                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 697                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "RequestCompleted"
 698                         : "InvalidStatus"));
 699             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 700                     lr->lr_outrefcnt, lr->lr_parentcnt );
 701         }
 702 #ifdef LDAP_R_COMPILE
 703         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 704 #endif
 705         fprintf( stderr, "** ld %p Response Queue:\n", (void *)ld );
 706         if (( lm = ld->ld_responses ) == NULL ) {
 707                 fprintf( stderr, "   Empty\n" );
 708         }
 709         for ( ; lm != NULL; lm = lm->lm_next ) {
 710                 fprintf( stderr, " * msgid %d,  type %lu\n",
 711                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 712                 if (( l = lm->lm_chain ) != NULL ) {
 713                         fprintf( stderr, "   chained responses:\n" );
 714                         for ( ; l != NULL; l = l->lm_chain ) {
 715                                 fprintf( stderr,
 716                                     "  * msgid %d,  type %lu\n",
 717                                     l->lm_msgid,
 718                                     (unsigned long) l->lm_msgtype );
 719                         }
 720                 }
 721         }
 722 }
 723 #endif /* LDAP_DEBUG */
 724
 725 static void
 726 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 727 {
 728         if ( lr->lr_prev == NULL ) {
 729                 /* free'ing the first request? */
 730                 assert( ld->ld_requests == lr );
 731                 ld->ld_requests = lr->lr_next;
 732
 733         } else {
 734                 lr->lr_prev->lr_next = lr->lr_next;
 735         }
 736
 737         if ( lr->lr_next != NULL ) {
 738                 lr->lr_next->lr_prev = lr->lr_prev;
 739         }
 740
 741         if ( lr->lr_ber != NULL ) {
 742                 ber_free( lr->lr_ber, 1 );
 743         }
 744
 745         if ( lr->lr_res_error != NULL ) {
 746                 LDAP_FREE( lr->lr_res_error );
 747         }
 748
 749         if ( lr->lr_res_matched != NULL ) {
 750                 LDAP_FREE( lr->lr_res_matched );
 751         }
 752
 753         LDAP_FREE( lr );
 754 }
 755
 756 void
 757 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 758 {
 759         LDAPRequest     **ttmplr;
 760
 761         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 762                 lr->lr_origid, lr->lr_msgid, 0 );
 763
 764         /* free all referrals (child requests) */
 765         while ( lr->lr_child )
 766                 ldap_free_request( ld, lr->lr_child );
 767
 768         if ( lr->lr_parent != NULL ) {
 769                 --lr->lr_parent->lr_outrefcnt;
 770                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 771                 if ( *ttmplr == lr )
 772                         *ttmplr = lr->lr_refnext;
 773         }
 774         ldap_free_request_int( ld, lr );
 775 }
 776
 777 /*
 778  * call first time with *cntp = -1
 779  * when returns *cntp == -1, no referrals are left
 780  *
 781  * NOTE: may replace *refsp, or shuffle the contents
 782  * of the original array.
 783  */
 784 static int ldap_int_nextref(
 785         LDAP                    *ld,
 786         char                    ***refsp,
 787         int                     *cntp,
 788         void                    *params )
 789 {
 790         assert( refsp != NULL );
 791         assert( *refsp != NULL );
 792         assert( cntp != NULL );
 793
 794         if ( *cntp < -1 ) {
 795                 *cntp = -1;
 796                 return -1;
 797         }
 798
 799         (*cntp)++;
 800
 801         if ( (*refsp)[ *cntp ] == NULL ) {
 802                 *cntp = -1;
 803         }
 804
 805         return 0;
 806 }
 807
 808 /*
 809  * Chase v3 referrals
 810  *
 811  * Parameters:
 812  *  (IN) ld = LDAP connection handle
 813  *  (IN) lr = LDAP Request structure
 814  *  (IN) refs = array of pointers to referral strings that we will chase
 815  *              The array will be free'd by this function when no longer needed
 816  *  (IN) sref != 0 if following search reference
 817  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 818  *  (OUT) hadrefp = 1 if sucessfully followed referral
 819  *
 820  * Return value - number of referrals followed
 821  */
 822 int
 823 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 824 {
 825         char            *unfollowed;
 826         int              unfollowedcnt = 0;
 827         LDAPRequest     *origreq;
 828         LDAPURLDesc     *srv = NULL;
 829         BerElement      *ber;
 830         char            **refarray = NULL;
 831         LDAPConn        *lc;
 832         int                      rc, count, i, j, id;
 833         LDAPreqinfo  rinfo;
 834
 835         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 836         *hadrefp = 0;
 837
 838         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 839
 840         unfollowed = NULL;
 841         rc = count = 0;
 842
 843         /* If no referrals in array, return */
 844         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 845                 rc = 0;
 846                 goto done;
 847         }
 848
 849         /* Check for hop limit exceeded */
 850         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 851                 Debug( LDAP_DEBUG_ANY,
 852                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 853                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 854             rc = -1;
 855                 goto done;
 856         }
 857
 858         /* find original request */
 859         for ( origreq = lr;
 860                 origreq->lr_parent != NULL;
 861                 origreq = origreq->lr_parent )
 862         {
 863                 /* empty */ ;
 864         }
 865
 866         refarray = refs;
 867         refs = NULL;
 868
 869         if ( ld->ld_nextref_proc == NULL ) {
 870                 ld->ld_nextref_proc = ldap_int_nextref;
 871         }
 872
 873         /* parse out & follow referrals */
 874         i = -1;
 875         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 876                         i != -1;
 877                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 878         {
 879
 880                 /* Parse the referral URL */
 881                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 882                         ld->ld_errno = rc;
 883                         rc = -1;
 884                         goto done;
 885                 }
 886
 887                 if( srv->lud_crit_exts ) {
 888                         /* we do not support any extensions */
 889                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 890                         rc = -1;
 891                         goto done;
 892                 }
 893
 894                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 895                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 896                         LDAP_FREE( srv->lud_dn );
 897                         srv->lud_dn = NULL;
 898                 }
 899
 900                 /* check connection for re-bind in progress */
 901                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 902                         /* See if we've already requested this DN with this conn */
 903                         LDAPRequest *lp;
 904                         int looped = 0;
 905                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
 906                         for ( lp = origreq; lp; ) {
 907                                 if ( lp->lr_conn == lc ) {
 908                                         if ( len == lp->lr_dn.bv_len
 909                                                 && len
 910                                                 && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) == 0 )
 911                                         {
 912                                                 looped = 1;
 913                                                 break;
 914                                         }
 915                                 }
 916                                 if ( lp == origreq ) {
 917                                         lp = lp->lr_child;
 918                                 } else {
 919                                         lp = lr->lr_refnext;
 920                                 }
 921                         }
 922                         if ( looped ) {
 923                                 ldap_free_urllist( srv );
 924                                 srv = NULL;
 925                                 ld->ld_errno = LDAP_CLIENT_LOOP;
 926                                 rc = -1;
 927                                 continue;
 928                         }
 929
 930                         if ( lc->lconn_rebind_inprogress ) {
 931                                 /* We are already chasing a referral or search reference and a
 932                                  * bind on that connection is in progress.  We must queue
 933                                  * referrals on that connection, so we don't get a request
 934                                  * going out before the bind operation completes. This happens
 935                                  * if two search references come in one behind the other
 936                                  * for the same server with different contexts.
 937                                  */
 938                                 Debug( LDAP_DEBUG_TRACE,
 939                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 940                                         refarray[i], 0, 0);
 941                                 if( lc->lconn_rebind_queue == NULL ) {
 942                                         /* Create a referral list */
 943                                         lc->lconn_rebind_queue =
 944                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 945
 946                                         if( lc->lconn_rebind_queue == NULL) {
 947                                                 ld->ld_errno = LDAP_NO_MEMORY;
 948                                                 rc = -1;
 949                                                 goto done;
 950                                         }
 951
 952                                         lc->lconn_rebind_queue[0] = refarray;
 953                                         lc->lconn_rebind_queue[1] = NULL;
 954                                         refarray = NULL;
 955
 956                                 } else {
 957                                         /* Count how many referral arrays we already have */
 958                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 959                                                 /* empty */;
 960                                         }
 961
 962                                         /* Add the new referral to the list */
 963                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 964                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 965
 966                                         if( lc->lconn_rebind_queue == NULL ) {
 967                                                 ld->ld_errno = LDAP_NO_MEMORY;
 968                                                 rc = -1;
 969                                                 goto done;
 970                                         }
 971                                         lc->lconn_rebind_queue[j] = refarray;
 972                                         lc->lconn_rebind_queue[j+1] = NULL;
 973                                         refarray = NULL;
 974                                 }
 975
 976                                 /* We have queued the referral/reference, now just return */
 977                                 rc = 0;
 978                                 *hadrefp = 1;
 979                                 count = 1; /* Pretend we already followed referral */
 980                                 goto done;
 981                         }
 982                 }
 983                 /* Re-encode the request with the new starting point of the search.
 984                  * Note: In the future we also need to replace the filter if one
 985                  * was provided with the search reference
 986                  */
 987
 988                 /* For references we don't want old dn if new dn empty */
 989                 if ( sref && srv->lud_dn == NULL ) {
 990                         srv->lud_dn = LDAP_STRDUP( "" );
 991                 }
 992
 993                 LDAP_NEXT_MSGID( ld, id );
 994                 ber = re_encode_request( ld, origreq->lr_ber, id,
 995                         sref, srv, &rinfo.ri_request );
 996
 997                 if( ber == NULL ) {
 998                         ld->ld_errno = LDAP_ENCODING_ERROR;
 999                         rc = -1;
1000                         goto done;
1001                 }
1002
1003                 Debug( LDAP_DEBUG_TRACE,
1004                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
1005                         lr->lr_msgid, refarray[i], 0);
1006
1007                 /* Send the new request to the server - may require a bind */
1008                 rinfo.ri_msgid = origreq->lr_origid;
1009                 rinfo.ri_url = refarray[i];
1010 #ifdef LDAP_R_COMPILE
1011                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1012 #endif
1013                 rc = ldap_send_server_request( ld, ber, id,
1014                         origreq, srv, NULL, &rinfo );
1015 #ifdef LDAP_R_COMPILE
1016                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1017 #endif
1018                 if ( rc < 0 ) {
1019                         /* Failure, try next referral in the list */
1020                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%d: %s)\n",
1021                                 refarray[i], ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1022                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i] );
1023                         ldap_free_urllist( srv );
1024                         srv = NULL;
1025                         ld->ld_errno = LDAP_REFERRAL;
1026                 } else {
1027                         /* Success, no need to try this referral list further */
1028                         rc = 0;
1029                         ++count;
1030                         *hadrefp = 1;
1031
1032                         /* check if there is a queue of referrals that came in during bind */
1033                         if ( lc == NULL) {
1034                                 lc = find_connection( ld, srv, 1 );
1035                                 if ( lc == NULL ) {
1036                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
1037                                         rc = -1;
1038                                         goto done;
1039                                 }
1040                         }
1041
1042                         if ( lc->lconn_rebind_queue != NULL ) {
1043                                 /* Release resources of previous list */
1044                                 LDAP_VFREE( refarray );
1045                                 refarray = NULL;
1046                                 ldap_free_urllist( srv );
1047                                 srv = NULL;
1048
1049                                 /* Pull entries off end of queue so list always null terminated */
1050                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++ )
1051                                         ;
1052                                 refarray = lc->lconn_rebind_queue[j - 1];
1053                                 lc->lconn_rebind_queue[j-1] = NULL;
1054                                 /* we pulled off last entry from queue, free queue */
1055                                 if ( j == 1 ) {
1056                                         LDAP_FREE( lc->lconn_rebind_queue );
1057                                         lc->lconn_rebind_queue = NULL;
1058                                 }
1059                                 /* restart the loop the with new referral list */
1060                                 i = -1;
1061                                 continue;
1062                         }
1063                         break; /* referral followed, break out of for loop */
1064                 }
1065         } /* end for loop */
1066 done:
1067         LDAP_VFREE( refarray );
1068         ldap_free_urllist( srv );
1069         LDAP_FREE( *errstrp );
1070
1071         if( rc == 0 ) {
1072                 *errstrp = NULL;
1073                 LDAP_FREE( unfollowed );
1074                 return count;
1075         } else {
1076                 *errstrp = unfollowed;
1077                 return rc;
1078         }
1079 }
1080
1081 /*
1082  * XXX merging of errors in this routine needs to be improved
1083  */
1084 int
1085 ldap_chase_referrals( LDAP *ld,
1086         LDAPRequest *lr,
1087         char **errstrp,
1088         int sref,
1089         int *hadrefp )
1090 {
1091         int             rc, count, id;
1092         unsigned        len;
1093         char            *p, *ref, *unfollowed;
1094         LDAPRequest     *origreq;
1095         LDAPURLDesc     *srv;
1096         BerElement      *ber;
1097         LDAPreqinfo  rinfo;
1098         LDAPConn        *lc;
1099
1100         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
1101
1102         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
1103         *hadrefp = 0;
1104
1105         if ( *errstrp == NULL ) {
1106                 return( 0 );
1107         }
1108
1109         len = strlen( *errstrp );
1110         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1111                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1112                         *p = '\0';
1113                         p += LDAP_REF_STR_LEN;
1114                         break;
1115                 }
1116         }
1117
1118         if ( len < LDAP_REF_STR_LEN ) {
1119                 return( 0 );
1120         }
1121
1122         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1123                 Debug( LDAP_DEBUG_ANY,
1124                     "more than %d referral hops (dropping)\n",
1125                     ld->ld_refhoplimit, 0, 0 );
1126                     /* XXX report as error in ld->ld_errno? */
1127                     return( 0 );
1128         }
1129
1130         /* find original request */
1131         for ( origreq = lr; origreq->lr_parent != NULL;
1132              origreq = origreq->lr_parent ) {
1133                 /* empty */;
1134         }
1135
1136         unfollowed = NULL;
1137         rc = count = 0;
1138
1139         /* parse out & follow referrals */
1140         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1141                 p = strchr( ref, '\n' );
1142                 if ( p != NULL ) {
1143                         *p++ = '\0';
1144                 }
1145
1146                 rc = ldap_url_parse_ext( ref, &srv );
1147
1148                 if ( rc != LDAP_URL_SUCCESS ) {
1149                         Debug( LDAP_DEBUG_TRACE,
1150                             "ignoring unknown referral <%s>\n", ref, 0, 0 );
1151                         rc = ldap_append_referral( ld, &unfollowed, ref );
1152                         *hadrefp = 1;
1153                         continue;
1154                 }
1155
1156                 if ( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1157                         LDAP_FREE( srv->lud_dn );
1158                         srv->lud_dn = NULL;
1159                 }
1160
1161                 Debug( LDAP_DEBUG_TRACE,
1162                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1163
1164                 *hadrefp = 1;
1165
1166                 /* See if we've already been here */
1167                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
1168                         LDAPRequest *lp;
1169                         int looped = 0;
1170                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
1171                         for (lp = lr; lp; lp = lp->lr_parent ) {
1172                                 if ( lp->lr_conn == lc ) {
1173                                         if ( len == lp->lr_dn.bv_len ) {
1174                                                 if ( len && strncmp( srv->lud_dn, lp->lr_dn.bv_val,
1175                                                         len ))
1176                                                         continue;
1177                                                 looped = 1;
1178                                                 break;
1179                                         }
1180                                 }
1181                         }
1182                         if ( looped ) {
1183                                 ldap_free_urllist(srv);
1184                                 ld->ld_errno = LDAP_CLIENT_LOOP;
1185                                 rc = -1;
1186                                 continue;
1187                         }
1188                 }
1189
1190                 LDAP_NEXT_MSGID( ld, id );
1191                 ber = re_encode_request( ld, origreq->lr_ber,
1192                     id, sref, srv, &rinfo.ri_request );
1193
1194                 if ( ber == NULL ) {
1195                         return -1 ;
1196                 }
1197
1198                 /* copy the complete referral for rebind process */
1199                 rinfo.ri_url = LDAP_STRDUP( ref );
1200
1201                 rinfo.ri_msgid = origreq->lr_origid;
1202
1203 #ifdef LDAP_R_COMPILE
1204                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1205 #endif
1206                 rc = ldap_send_server_request( ld, ber, id,
1207                         lr, srv, NULL, &rinfo );
1208 #ifdef LDAP_R_COMPILE
1209                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1210 #endif
1211
1212                 LDAP_FREE( rinfo.ri_url );
1213
1214                 if( rc >= 0 ) {
1215                         ++count;
1216                 } else {
1217                         Debug( LDAP_DEBUG_ANY,
1218                                 "Unable to chase referral \"%s\" (%d: %s)\n",
1219                                 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1220                         rc = ldap_append_referral( ld, &unfollowed, ref );
1221                 }
1222
1223                 ldap_free_urllist(srv);
1224         }
1225
1226         LDAP_FREE( *errstrp );
1227         *errstrp = unfollowed;
1228
1229         return(( rc == 0 ) ? count : rc );
1230 }
1231
1232
1233 int
1234 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1235 {
1236         int     first;
1237
1238         if ( *referralsp == NULL ) {
1239                 first = 1;
1240                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1241                     + 1 );
1242         } else {
1243                 first = 0;
1244                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1245                     strlen( *referralsp ) + strlen( s ) + 2 );
1246         }
1247
1248         if ( *referralsp == NULL ) {
1249                 ld->ld_errno = LDAP_NO_MEMORY;
1250                 return( -1 );
1251         }
1252
1253         if ( first ) {
1254                 strcpy( *referralsp, LDAP_REF_STR );
1255         } else {
1256                 strcat( *referralsp, "\n" );
1257         }
1258         strcat( *referralsp, s );
1259
1260         return( 0 );
1261 }
1262
1263
1264
1265 static BerElement *
1266 re_encode_request( LDAP *ld,
1267         BerElement *origber,
1268         ber_int_t msgid,
1269         int sref,
1270         LDAPURLDesc *srv,
1271         int *type )
1272 {
1273         /*
1274          * XXX this routine knows way too much about how the lber library works!
1275          */
1276         ber_int_t       along;
1277         ber_tag_t       tag;
1278         ber_tag_t       rtag;
1279         ber_int_t       ver;
1280         ber_int_t       scope;
1281         int             rc;
1282         BerElement      tmpber, *ber;
1283         struct berval           dn;
1284
1285         Debug( LDAP_DEBUG_TRACE,
1286             "re_encode_request: new msgid %ld, new dn <%s>\n",
1287             (long) msgid,
1288                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1289
1290         tmpber = *origber;
1291
1292         /*
1293          * all LDAP requests are sequences that start with a message id.
1294          * For all except delete, this is followed by a sequence that is
1295          * tagged with the operation code.  For delete, the provided DN
1296          * is not wrapped by a sequence.
1297          */
1298         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1299
1300         if ( rtag == LBER_ERROR ) {
1301                 ld->ld_errno = LDAP_DECODING_ERROR;
1302                 return( NULL );
1303         }
1304
1305         assert( tag != 0);
1306         if ( tag == LDAP_REQ_BIND ) {
1307                 /* bind requests have a version number before the DN & other stuff */
1308                 rtag = ber_scanf( &tmpber, "{im" /*}*/, &ver, &dn );
1309
1310         } else if ( tag == LDAP_REQ_DELETE ) {
1311                 /* delete requests don't have a DN wrapping sequence */
1312                 rtag = ber_scanf( &tmpber, "m", &dn );
1313
1314         } else if ( tag == LDAP_REQ_SEARCH ) {
1315                 /* search requests need to be re-scope-ed */
1316                 rtag = ber_scanf( &tmpber, "{me" /*"}"*/, &dn, &scope );
1317
1318                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1319                         /* use the scope provided in reference */
1320                         scope = srv->lud_scope;
1321
1322                 } else if ( sref ) {
1323                         /* use scope implied by previous operation
1324                          *   base -> base
1325                          *   one -> base
1326                          *   subtree -> subtree
1327                          *   subordinate -> subtree
1328                          */
1329                         switch( scope ) {
1330                         default:
1331                         case LDAP_SCOPE_BASE:
1332                         case LDAP_SCOPE_ONELEVEL:
1333                                 scope = LDAP_SCOPE_BASE;
1334                                 break;
1335                         case LDAP_SCOPE_SUBTREE:
1336 #ifdef LDAP_SCOPE_SUBORDINATE
1337                         case LDAP_SCOPE_SUBORDINATE:
1338 #endif
1339                                 scope = LDAP_SCOPE_SUBTREE;
1340                                 break;
1341                         }
1342                 }
1343
1344         } else {
1345                 rtag = ber_scanf( &tmpber, "{m" /*}*/, &dn );
1346         }
1347
1348         if( rtag == LBER_ERROR ) {
1349                 ld->ld_errno = LDAP_DECODING_ERROR;
1350                 return NULL;
1351         }
1352
1353         /* restore character zero'd out by ber_scanf*/
1354         dn.bv_val[dn.bv_len] = tmpber.ber_tag;
1355
1356         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1357                 return NULL;
1358         }
1359
1360         if ( srv->lud_dn ) {
1361                 ber_str2bv( srv->lud_dn, 0, 0, &dn );
1362         }
1363
1364         if ( tag == LDAP_REQ_BIND ) {
1365                 rc = ber_printf( ber, "{it{iO" /*}}*/, msgid, tag, ver, &dn );
1366         } else if ( tag == LDAP_REQ_DELETE ) {
1367                 rc = ber_printf( ber, "{itON}", msgid, tag, &dn );
1368         } else if ( tag == LDAP_REQ_SEARCH ) {
1369                 rc = ber_printf( ber, "{it{Oe" /*}}*/, msgid, tag, &dn, scope );
1370         } else {
1371                 rc = ber_printf( ber, "{it{O" /*}}*/, msgid, tag, &dn );
1372         }
1373
1374         if ( rc == -1 ) {
1375                 ld->ld_errno = LDAP_ENCODING_ERROR;
1376                 ber_free( ber, 1 );
1377                 return NULL;
1378         }
1379
1380         if ( tag != LDAP_REQ_DELETE && (
1381                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1382                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1383             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1384         {
1385                 ld->ld_errno = LDAP_ENCODING_ERROR;
1386                 ber_free( ber, 1 );
1387                 return NULL;
1388         }
1389
1390 #ifdef LDAP_DEBUG
1391         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1392                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1393                     0, 0, 0 );
1394                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1395         }
1396 #endif /* LDAP_DEBUG */
1397
1398         *type = tag;    /* return request type */
1399         return ber;
1400 }
1401
1402
1403 LDAPRequest *
1404 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1405 {
1406         LDAPRequest     *lr;
1407
1408 #ifdef LDAP_R_COMPILE
1409         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1410 #endif
1411         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1412                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1413                         continue;       /* Skip completed requests */
1414                 }
1415                 if ( msgid == lr->lr_msgid ) {
1416                         break;
1417                 }
1418         }
1419 #ifdef LDAP_R_COMPILE
1420         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1421 #endif
1422
1423         return( lr );
1424 }
1425
1426