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         ber = ber_alloc_t( ld->ld_lberoptions );
  74         if ( ber == NULL ) {
  75                 ld->ld_errno = LDAP_NO_MEMORY;
  76         }
  77
  78         return( ber );
  79 }
  80
  81
  82 void
  83 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  84 {
  85         ber->ber_options = ld->ld_lberoptions;
  86 }
  87
  88
  89 ber_int_t
  90 ldap_send_initial_request(
  91         LDAP *ld,
  92         ber_tag_t msgtype,
  93         const char *dn,
  94         BerElement *ber,
  95         ber_int_t msgid)
  96 {
  97         int rc = 1;
  98
  99         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
 100
 101 #ifdef LDAP_R_COMPILE
 102         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 103 #endif
 104         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 105                 /* not connected yet */
 106                 rc = ldap_open_defconn( ld );
 107
 108         }
 109 #ifdef LDAP_R_COMPILE
 110         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 111 #endif
 112         if( rc < 0 ) {
 113                 ber_free( ber, 1 );
 114                 return( -1 );
 115         } else if ( rc == 0 ) {
 116                 Debug( LDAP_DEBUG_TRACE,
 117                         "ldap_open_defconn: successful\n",
 118                         0, 0, 0 );
 119         }
 120
 121 #ifdef LDAP_CONNECTIONLESS
 122         if (LDAP_IS_UDP(ld)) {
 123                 if (msgtype == LDAP_REQ_BIND) {
 124                         if (ld->ld_options.ldo_cldapdn)
 125                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 126                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 127                         return 0;
 128                 }
 129                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 130                         return LDAP_PARAM_ERROR;
 131         }
 132 #endif
 133 #ifdef LDAP_R_COMPILE
 134         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 135 #endif
 136         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 137                 NULL, NULL, NULL );
 138 #ifdef LDAP_R_COMPILE
 139         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 140 #endif
 141         return(rc);
 142 }
 143
 144
 145 int
 146 ldap_int_flush_request(
 147         LDAP *ld,
 148         LDAPRequest *lr )
 149 {
 150         LDAPConn *lc = lr->lr_conn;
 151
 152         if ( ber_flush2( lc->lconn_sb, lr->lr_ber, LBER_FLUSH_FREE_NEVER ) != 0 ) {
 153                 if ( errno == EAGAIN ) {
 154                         /* need to continue write later */
 155                         lr->lr_status = LDAP_REQST_WRITING;
 156                         ldap_mark_select_write( ld, lc->lconn_sb );
 157                         ld->ld_errno = LDAP_BUSY;
 158                         return -2;
 159                 } else {
 160                         ld->ld_errno = LDAP_SERVER_DOWN;
 161                         ldap_free_request( ld, lr );
 162                         ldap_free_connection( ld, lc, 0, 0 );
 163                         return( -1 );
 164                 }
 165         } else {
 166                 if ( lr->lr_parent == NULL ) {
 167                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 168                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 169                 }
 170                 lr->lr_status = LDAP_REQST_INPROGRESS;
 171
 172                 /* sent -- waiting for a response */
 173                 ldap_mark_select_read( ld, lc->lconn_sb );
 174         }
 175         return 0;
 176 }
 177
 178 int
 179 ldap_send_server_request(
 180         LDAP *ld,
 181         BerElement *ber,
 182         ber_int_t msgid,
 183         LDAPRequest *parentreq,
 184         LDAPURLDesc **srvlist,
 185         LDAPConn *lc,
 186         LDAPreqinfo *bind )
 187 {
 188         LDAPRequest     *lr;
 189         int             incparent, rc;
 190
 191         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 192
 193         incparent = 0;
 194         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 195
 196         if ( lc == NULL ) {
 197                 if ( srvlist == NULL ) {
 198                         lc = ld->ld_defconn;
 199                 } else {
 200                         lc = find_connection( ld, *srvlist, 1 );
 201                         if ( lc == NULL ) {
 202                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 203                                         /* Remember the bind in the parent */
 204                                         incparent = 1;
 205                                         ++parentreq->lr_outrefcnt;
 206                                 }
 207                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 208                         }
 209                 }
 210         }
 211
 212         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 213                 ber_free( ber, 1 );
 214                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 215                         ld->ld_errno = LDAP_SERVER_DOWN;
 216                 }
 217                 if ( incparent ) {
 218                         /* Forget about the bind */
 219                         --parentreq->lr_outrefcnt;
 220                 }
 221                 return( -1 );
 222         }
 223
 224         use_connection( ld, lc );
 225
 226         /* If we still have an incomplete write, try to finish it before
 227          * dealing with the new request. If we don't finish here, return
 228          * LDAP_BUSY and let the caller retry later. We only allow a single
 229          * request to be in WRITING state.
 230          */
 231         rc = 0;
 232         if ( ld->ld_requests &&
 233                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 234                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
 235         {
 236                 rc = -1;
 237         }
 238         if ( rc ) return rc;
 239
 240         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ) );
 241         if ( lr == NULL ) {
 242                 ld->ld_errno = LDAP_NO_MEMORY;
 243                 ldap_free_connection( ld, lc, 0, 0 );
 244                 ber_free( ber, 1 );
 245                 if ( incparent ) {
 246                         /* Forget about the bind */
 247                         --parentreq->lr_outrefcnt;
 248                 }
 249                 return( -1 );
 250         }
 251         lr->lr_msgid = msgid;
 252         lr->lr_status = LDAP_REQST_INPROGRESS;
 253         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 254         lr->lr_ber = ber;
 255         lr->lr_conn = lc;
 256         if ( parentreq != NULL ) {      /* sub-request */
 257                 if ( !incparent ) {
 258                         /* Increment if we didn't do it before the bind */
 259                         ++parentreq->lr_outrefcnt;
 260                 }
 261                 lr->lr_origid = parentreq->lr_origid;
 262                 lr->lr_parentcnt = ++parentreq->lr_parentcnt;
 263                 lr->lr_parent = parentreq;
 264                 lr->lr_refnext = parentreq->lr_child;
 265                 parentreq->lr_child = lr;
 266         } else {                        /* original request */
 267                 lr->lr_origid = lr->lr_msgid;
 268         }
 269
 270         /* Extract requestDN for future reference */
 271         {
 272                 BerElement tmpber = *ber;
 273                 ber_int_t       bint;
 274                 ber_tag_t       tag, rtag;
 275
 276                 ber_reset( &tmpber, 1 );
 277                 rtag = ber_scanf( &tmpber, "{it", /*}*/ &bint, &tag );
 278                 switch ( tag ) {
 279                 case LDAP_REQ_BIND:
 280                         rtag = ber_scanf( &tmpber, "{i" /*}*/, &bint );
 281                         break;
 282                 case LDAP_REQ_DELETE:
 283                         break;
 284                 default:
 285                         rtag = ber_scanf( &tmpber, "{" /*}*/ );
 286                 case LDAP_REQ_ABANDON:
 287                         break;
 288                 }
 289                 if ( tag != LDAP_REQ_ABANDON ) {
 290                         ber_skip_tag( &tmpber, &lr->lr_dn.bv_len );
 291                         lr->lr_dn.bv_val = tmpber.ber_ptr;
 292                 }
 293         }
 294
 295         lr->lr_prev = NULL;
 296         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 297                 lr->lr_next->lr_prev = lr;
 298         }
 299         ld->ld_requests = lr;
 300
 301         ld->ld_errno = LDAP_SUCCESS;
 302         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 303                 msgid = -1;
 304         }
 305
 306         return( msgid );
 307 }
 308
 309 LDAPConn *
 310 ldap_new_connection( LDAP *ld, LDAPURLDesc **srvlist, int use_ldsb,
 311         int connect, LDAPreqinfo *bind )
 312 {
 313         LDAPConn        *lc;
 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                 LDAPURLDesc     **srvp, *srv = NULL;
 342
 343                 for ( srvp = srvlist; *srvp != NULL; srvp = &(*srvp)->lud_next ) {
 344                         if ( ldap_int_open_connection( ld, lc, *srvp, 0 ) != -1 )
 345                         {
 346                                 srv = *srvp;
 347
 348                                 if ( ld->ld_urllist_proc ) {
 349                                         ld->ld_urllist_proc( ld, srvlist, srvp, ld->ld_urllist_params );
 350                                 }
 351
 352                                 break;
 353                         }
 354                 }
 355
 356                 if ( srv == NULL ) {
 357                         if ( !use_ldsb ) {
 358                                 ber_sockbuf_free( lc->lconn_sb );
 359                         }
 360                         LDAP_FREE( (char *)lc );
 361                         ld->ld_errno = LDAP_SERVER_DOWN;
 362                         return( NULL );
 363                 }
 364
 365                 lc->lconn_server = ldap_url_dup( srv );
 366         }
 367
 368         lc->lconn_status = LDAP_CONNST_CONNECTED;
 369 #ifdef LDAP_R_COMPILE
 370         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 371 #endif
 372         lc->lconn_next = ld->ld_conns;
 373         ld->ld_conns = lc;
 374 #ifdef LDAP_R_COMPILE
 375         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 376 #endif
 377
 378         if ( bind != NULL ) {
 379                 int             err = 0;
 380                 LDAPConn        *savedefconn;
 381
 382                 /* Set flag to prevent additional referrals
 383                  * from being processed on this
 384                  * connection until the bind has completed
 385                  */
 386                 lc->lconn_rebind_inprogress = 1;
 387                 /* V3 rebind function */
 388                 if ( ld->ld_rebind_proc != NULL) {
 389                         LDAPURLDesc     *srvfunc;
 390
 391                         srvfunc = ldap_url_dup( *srvlist );
 392                         if ( srvfunc == NULL ) {
 393                                 ld->ld_errno = LDAP_NO_MEMORY;
 394                                 err = -1;
 395                         } else {
 396                                 savedefconn = ld->ld_defconn;
 397                                 ++lc->lconn_refcnt;     /* avoid premature free */
 398                                 ld->ld_defconn = lc;
 399
 400                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 401 #ifdef LDAP_R_COMPILE
 402                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 403                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 404 #endif
 405                                 err = (*ld->ld_rebind_proc)( ld,
 406                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 407                                         ld->ld_rebind_params );
 408 #ifdef LDAP_R_COMPILE
 409                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 410                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 411 #endif
 412
 413                                 ld->ld_defconn = savedefconn;
 414                                 --lc->lconn_refcnt;
 415
 416                                 if ( err != 0 ) {
 417                                         err = -1;
 418                                         ldap_free_connection( ld, lc, 1, 0 );
 419                                         lc = NULL;
 420                                 }
 421                                 ldap_free_urldesc( srvfunc );
 422                         }
 423                 } else {
 424                         int             msgid, rc;
 425                         struct berval   passwd = BER_BVNULL;
 426
 427                         savedefconn = ld->ld_defconn;
 428                         ++lc->lconn_refcnt;     /* avoid premature free */
 429                         ld->ld_defconn = lc;
 430
 431                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 432 #ifdef LDAP_R_COMPILE
 433                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 434                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 435 #endif
 436                         rc = ldap_sasl_bind( ld, "", LDAP_SASL_SIMPLE, &passwd,
 437                                 NULL, NULL, &msgid );
 438                         if ( rc != LDAP_SUCCESS ) {
 439                                 err = -1;
 440
 441                         } else {
 442                                 for ( err = 1; err > 0; ) {
 443                                         struct timeval  tv = { 0, 100000 };
 444                                         LDAPMessage     *res = NULL;
 445
 446                                         switch ( ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 447                                         case -1:
 448                                                 err = -1;
 449                                                 break;
 450
 451                                         case 0:
 452 #ifdef LDAP_R_COMPILE
 453                                                 ldap_pvt_thread_yield();
 454 #endif
 455                                                 break;
 456
 457                                         case LDAP_RES_BIND:
 458                                                 rc = ldap_parse_result( ld, res, &err, NULL, NULL, NULL, NULL, 1 );
 459                                                 if ( rc != LDAP_SUCCESS ) {
 460                                                         err = -1;
 461
 462                                                 } else if ( err != LDAP_SUCCESS ) {
 463                                                         err = -1;
 464                                                 }
 465                                                 /* else err == LDAP_SUCCESS == 0 */
 466                                                 break;
 467
 468                                         default:
 469                                                 assert( 0 );
 470                                         }
 471                                 }
 472                         }
 473 #ifdef LDAP_R_COMPILE
 474                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 475                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 476 #endif
 477                         ld->ld_defconn = savedefconn;
 478                         --lc->lconn_refcnt;
 479
 480                         if ( err != 0 ) {
 481                                 ldap_free_connection( ld, lc, 1, 0 );
 482                                 lc = NULL;
 483                         }
 484                 }
 485                 if ( lc != NULL )
 486                         lc->lconn_rebind_inprogress = 0;
 487         }
 488
 489         return( lc );
 490 }
 491
 492
 493 static LDAPConn *
 494 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 495 /*
 496  * return an existing connection (if any) to the server srv
 497  * if "any" is non-zero, check for any server in the "srv" chain
 498  */
 499 {
 500         LDAPConn        *lc;
 501         LDAPURLDesc     *lcu, *lsu;
 502         int lcu_port, lsu_port;
 503         int found = 0;
 504
 505 #ifdef LDAP_R_COMPILE
 506         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 507 #endif
 508         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 509                 lcu = lc->lconn_server;
 510                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 511                         lcu->lud_port );
 512
 513                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 514                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 515                                 lsu->lud_port );
 516
 517                         if ( lsu_port == lcu_port
 518                                 && strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 519                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 520                                 && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 521                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0 )
 522                         {
 523                                 found = 1;
 524                                 break;
 525                         }
 526
 527                         if ( !any ) break;
 528                 }
 529                 if ( found )
 530                         break;
 531         }
 532 #ifdef LDAP_R_COMPILE
 533         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 534 #endif
 535         return lc;
 536 }
 537
 538
 539
 540 static void
 541 use_connection( LDAP *ld, LDAPConn *lc )
 542 {
 543         ++lc->lconn_refcnt;
 544         lc->lconn_lastused = time( NULL );
 545 }
 546
 547
 548 void
 549 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 550 {
 551         LDAPConn        *tmplc, *prevlc;
 552
 553         Debug( LDAP_DEBUG_TRACE,
 554                 "ldap_free_connection %d %d\n",
 555                 force, unbind, 0 );
 556
 557         if ( force || --lc->lconn_refcnt <= 0 ) {
 558                 /* remove from connections list first */
 559 #ifdef LDAP_R_COMPILE
 560                 ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 561 #endif
 562
 563                 for ( prevlc = NULL, tmplc = ld->ld_conns;
 564                         tmplc != NULL;
 565                         tmplc = tmplc->lconn_next )
 566                 {
 567                         if ( tmplc == lc ) {
 568                                 if ( prevlc == NULL ) {
 569                                     ld->ld_conns = tmplc->lconn_next;
 570                                 } else {
 571                                     prevlc->lconn_next = tmplc->lconn_next;
 572                                 }
 573                                 break;
 574                         }
 575                         prevlc = tmplc;
 576                 }
 577 #ifdef LDAP_R_COMPILE
 578                 ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 579 #endif
 580
 581                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 582                         ldap_mark_select_clear( ld, lc->lconn_sb );
 583                         if ( unbind ) {
 584                                 ldap_send_unbind( ld, lc->lconn_sb,
 585                                                 NULL, NULL );
 586                         }
 587                 }
 588
 589                 if ( lc->lconn_ber != NULL ) {
 590                         ber_free( lc->lconn_ber, 1 );
 591                 }
 592
 593                 ldap_int_sasl_close( ld, lc );
 594
 595                 ldap_free_urllist( lc->lconn_server );
 596 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 597                 if ( lc->lconn_krbinstance != NULL ) {
 598                         LDAP_FREE( lc->lconn_krbinstance );
 599                 }
 600 #endif
 601
 602                 /* FIXME: is this at all possible? */
 603                 if ( force ) {
 604                         LDAPRequest     *lr;
 605
 606                         for ( lr = ld->ld_requests; lr; ) {
 607                                 LDAPRequest     *lr_next = lr->lr_next;
 608
 609                                 if ( lr->lr_conn == lc ) {
 610                                         ldap_free_request_int( ld, lr );
 611                                 }
 612
 613                                 lr = lr_next;
 614                         }
 615                 }
 616
 617                 if ( lc->lconn_sb != ld->ld_sb ) {
 618                         ber_sockbuf_free( lc->lconn_sb );
 619                 }
 620
 621                 if ( lc->lconn_rebind_queue != NULL) {
 622                         int i;
 623                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 624                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 625                         }
 626                         LDAP_FREE( lc->lconn_rebind_queue );
 627                 }
 628
 629                 LDAP_FREE( lc );
 630
 631                 Debug( LDAP_DEBUG_TRACE,
 632                         "ldap_free_connection: actually freed\n",
 633                         0, 0, 0 );
 634
 635         } else {
 636                 lc->lconn_lastused = time( NULL );
 637                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 638                                 lc->lconn_refcnt, 0, 0 );
 639         }
 640 }
 641
 642
 643 #ifdef LDAP_DEBUG
 644 void
 645 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 646 {
 647         LDAPConn        *lc;
 648         char            timebuf[32];
 649
 650         Debug( LDAP_DEBUG_TRACE, "** ld %p Connection%s:\n", (void *)ld, all ? "s" : "", 0 );
 651         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 652                 if ( lc->lconn_server != NULL ) {
 653                         Debug( LDAP_DEBUG_TRACE, "* host: %s  port: %d%s\n",
 654                                 ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 655                                 : lc->lconn_server->lud_host,
 656                                 lc->lconn_server->lud_port, ( lc->lconn_sb ==
 657                                 ld->ld_sb ) ? "  (default)" : "" );
 658                 }
 659                 Debug( LDAP_DEBUG_TRACE, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 660                         ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET )
 661                         ?  "NeedSocket" : ( lc->lconn_status == LDAP_CONNST_CONNECTING )
 662                         ? "Connecting" : "Connected", 0 );
 663                 Debug( LDAP_DEBUG_TRACE, "  last used: %s%s\n",
 664                         ldap_pvt_ctime( &lc->lconn_lastused, timebuf ),
 665                         lc->lconn_rebind_inprogress ? "  rebind in progress" : "", 0 );
 666                 if ( lc->lconn_rebind_inprogress ) {
 667                         if ( lc->lconn_rebind_queue != NULL) {
 668                                 int     i;
 669
 670                                 for ( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 671                                         int     j;
 672                                         for( j = 0; lc->lconn_rebind_queue[i][j] != 0; j++ ) {
 673                                                 Debug( LDAP_DEBUG_TRACE, "    queue %d entry %d - %s\n",
 674                                                         i, j, lc->lconn_rebind_queue[i][j] );
 675                                         }
 676                                 }
 677                         } else {
 678                                 Debug( LDAP_DEBUG_TRACE, "    queue is empty\n", 0, 0, 0 );
 679                         }
 680                 }
 681                 Debug( LDAP_DEBUG_TRACE, "\n", 0, 0, 0 );
 682                 if ( !all ) {
 683                         break;
 684                 }
 685         }
 686 }
 687
 688
 689 void
 690 ldap_dump_requests_and_responses( LDAP *ld )
 691 {
 692         LDAPRequest     *lr;
 693         LDAPMessage     *lm, *l;
 694         int             i;
 695
 696         Debug( LDAP_DEBUG_TRACE, "** ld %p Outstanding Requests:\n",
 697                 (void *)ld, 0, 0 );
 698         lr = ld->ld_requests;
 699         if ( lr == NULL ) {
 700                 Debug( LDAP_DEBUG_TRACE, "   Empty\n", 0, 0, 0 );
 701         }
 702         for ( i = 0; lr != NULL; lr = lr->lr_next, i++ ) {
 703                 Debug( LDAP_DEBUG_TRACE, " * msgid %d,  origid %d, status %s\n",
 704                         lr->lr_msgid, lr->lr_origid,
 705                         ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 706                         ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 707                         ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 708                         ( lr->lr_status == LDAP_REQST_WRITING ) ? "Writing" :
 709                         ( lr->lr_status == LDAP_REQST_COMPLETED ) ? "RequestCompleted"
 710                                 : "InvalidStatus" );
 711                 Debug( LDAP_DEBUG_TRACE, "   outstanding referrals %d, parent count %d\n",
 712                         lr->lr_outrefcnt, lr->lr_parentcnt, 0 );
 713         }
 714         Debug( LDAP_DEBUG_TRACE, "  ld %p request count %d\n", (void *)ld, i, 0 );
 715         Debug( LDAP_DEBUG_TRACE, "** ld %p Response Queue:\n", (void *)ld, 0, 0 );
 716         if ( ( lm = ld->ld_responses ) == NULL ) {
 717                 Debug( LDAP_DEBUG_TRACE, "   Empty\n", 0, 0, 0 );
 718         }
 719         for ( i = 0; lm != NULL; lm = lm->lm_next, i++ ) {
 720                 Debug( LDAP_DEBUG_TRACE, " * msgid %d,  type %lu\n",
 721                     lm->lm_msgid, (unsigned long)lm->lm_msgtype, 0 );
 722                 if ( ( l = lm->lm_chain ) != NULL ) {
 723                         Debug( LDAP_DEBUG_TRACE, "   chained responses:\n", 0, 0, 0 );
 724                         for ( ; l != NULL; l = l->lm_chain ) {
 725                                 Debug( LDAP_DEBUG_TRACE,
 726                                         "  * msgid %d,  type %lu\n",
 727                                         l->lm_msgid,
 728                                         (unsigned long)l->lm_msgtype, 0 );
 729                         }
 730                 }
 731         }
 732         Debug( LDAP_DEBUG_TRACE, "  ld %p response count %d\n", (void *)ld, i, 0 );
 733 }
 734 #endif /* LDAP_DEBUG */
 735
 736 static void
 737 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 738 {
 739         if ( lr->lr_prev == NULL ) {
 740                 /* free'ing the first request? */
 741                 assert( ld->ld_requests == lr );
 742                 ld->ld_requests = lr->lr_next;
 743
 744         } else {
 745                 lr->lr_prev->lr_next = lr->lr_next;
 746         }
 747
 748         if ( lr->lr_next != NULL ) {
 749                 lr->lr_next->lr_prev = lr->lr_prev;
 750         }
 751
 752         if ( lr->lr_ber != NULL ) {
 753                 ber_free( lr->lr_ber, 1 );
 754                 lr->lr_ber = NULL;
 755         }
 756
 757         if ( lr->lr_res_error != NULL ) {
 758                 LDAP_FREE( lr->lr_res_error );
 759                 lr->lr_res_error = NULL;
 760         }
 761
 762         if ( lr->lr_res_matched != NULL ) {
 763                 LDAP_FREE( lr->lr_res_matched );
 764                 lr->lr_res_matched = NULL;
 765         }
 766
 767         LDAP_FREE( lr );
 768 }
 769
 770 void
 771 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 772 {
 773         LDAPRequest     **ttmplr;
 774 #ifdef LDAP_R_COMPILE
 775         LDAP_PVT_THREAD_ASSERT_MUTEX_OWNER( &ld->ld_req_mutex );
 776 #endif
 777
 778         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 779                 lr->lr_origid, lr->lr_msgid, 0 );
 780
 781         /* free all referrals (child requests) */
 782         while ( lr->lr_child )
 783                 ldap_free_request( ld, lr->lr_child );
 784
 785         if ( lr->lr_parent != NULL ) {
 786                 --lr->lr_parent->lr_outrefcnt;
 787                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 788                 if ( *ttmplr == lr )
 789                         *ttmplr = lr->lr_refnext;
 790         }
 791         ldap_free_request_int( ld, lr );
 792 }
 793
 794 /*
 795  * call first time with *cntp = -1
 796  * when returns *cntp == -1, no referrals are left
 797  *
 798  * NOTE: may replace *refsp, or shuffle the contents
 799  * of the original array.
 800  */
 801 static int ldap_int_nextref(
 802         LDAP                    *ld,
 803         char                    ***refsp,
 804         int                     *cntp,
 805         void                    *params )
 806 {
 807         assert( refsp != NULL );
 808         assert( *refsp != NULL );
 809         assert( cntp != NULL );
 810
 811         if ( *cntp < -1 ) {
 812                 *cntp = -1;
 813                 return -1;
 814         }
 815
 816         (*cntp)++;
 817
 818         if ( (*refsp)[ *cntp ] == NULL ) {
 819                 *cntp = -1;
 820         }
 821
 822         return 0;
 823 }
 824
 825 /*
 826  * Chase v3 referrals
 827  *
 828  * Parameters:
 829  *  (IN) ld = LDAP connection handle
 830  *  (IN) lr = LDAP Request structure
 831  *  (IN) refs = array of pointers to referral strings that we will chase
 832  *              The array will be free'd by this function when no longer needed
 833  *  (IN) sref != 0 if following search reference
 834  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 835  *  (OUT) hadrefp = 1 if sucessfully followed referral
 836  *
 837  * Return value - number of referrals followed
 838  */
 839 int
 840 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 841 {
 842         char            *unfollowed;
 843         int              unfollowedcnt = 0;
 844         LDAPRequest     *origreq;
 845         LDAPURLDesc     *srv = NULL;
 846         BerElement      *ber;
 847         char            **refarray = NULL;
 848         LDAPConn        *lc;
 849         int                      rc, count, i, j, id;
 850         LDAPreqinfo  rinfo;
 851
 852         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 853         *hadrefp = 0;
 854
 855         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 856
 857         unfollowed = NULL;
 858         rc = count = 0;
 859
 860         /* If no referrals in array, return */
 861         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 862                 rc = 0;
 863                 goto done;
 864         }
 865
 866         /* Check for hop limit exceeded */
 867         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 868                 Debug( LDAP_DEBUG_ANY,
 869                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 870                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 871                 rc = -1;
 872                 goto done;
 873         }
 874
 875         /* find original request */
 876         for ( origreq = lr;
 877                 origreq->lr_parent != NULL;
 878                 origreq = origreq->lr_parent )
 879         {
 880                 /* empty */ ;
 881         }
 882
 883         refarray = refs;
 884         refs = NULL;
 885
 886         if ( ld->ld_nextref_proc == NULL ) {
 887                 ld->ld_nextref_proc = ldap_int_nextref;
 888         }
 889
 890         /* parse out & follow referrals */
 891         i = -1;
 892         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 893                         i != -1;
 894                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 895         {
 896
 897                 /* Parse the referral URL */
 898                 rc = ldap_url_parse_ext( refarray[i], &srv, LDAP_PVT_URL_PARSE_NOEMPTY_DN );
 899                 if ( rc != LDAP_URL_SUCCESS ) {
 900                         /* ldap_url_parse_ext() returns LDAP_URL_* errors
 901                          * which do not map on API errors */
 902                         ld->ld_errno = LDAP_PARAM_ERROR;
 903                         rc = -1;
 904                         goto done;
 905                 }
 906
 907                 if( srv->lud_crit_exts ) {
 908                         /* we do not support any extensions */
 909                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 910                         rc = -1;
 911                         goto done;
 912                 }
 913
 914                 /* check connection for re-bind in progress */
 915                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 916                         /* See if we've already requested this DN with this conn */
 917                         LDAPRequest *lp;
 918                         int looped = 0;
 919                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
 920                         for ( lp = origreq; lp; ) {
 921                                 if ( lp->lr_conn == lc
 922                                         && len == lp->lr_dn.bv_len
 923                                         && len
 924                                         && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) == 0 )
 925                                 {
 926                                         looped = 1;
 927                                         break;
 928                                 }
 929                                 if ( lp == origreq ) {
 930                                         lp = lp->lr_child;
 931                                 } else {
 932                                         lp = lr->lr_refnext;
 933                                 }
 934                         }
 935                         if ( looped ) {
 936                                 ldap_free_urllist( srv );
 937                                 srv = NULL;
 938                                 ld->ld_errno = LDAP_CLIENT_LOOP;
 939                                 rc = -1;
 940                                 continue;
 941                         }
 942
 943                         if ( lc->lconn_rebind_inprogress ) {
 944                                 /* We are already chasing a referral or search reference and a
 945                                  * bind on that connection is in progress.  We must queue
 946                                  * referrals on that connection, so we don't get a request
 947                                  * going out before the bind operation completes. This happens
 948                                  * if two search references come in one behind the other
 949                                  * for the same server with different contexts.
 950                                  */
 951                                 Debug( LDAP_DEBUG_TRACE,
 952                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 953                                         refarray[i], 0, 0);
 954                                 if( lc->lconn_rebind_queue == NULL ) {
 955                                         /* Create a referral list */
 956                                         lc->lconn_rebind_queue =
 957                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 958
 959                                         if( lc->lconn_rebind_queue == NULL) {
 960                                                 ld->ld_errno = LDAP_NO_MEMORY;
 961                                                 rc = -1;
 962                                                 goto done;
 963                                         }
 964
 965                                         lc->lconn_rebind_queue[0] = refarray;
 966                                         lc->lconn_rebind_queue[1] = NULL;
 967                                         refarray = NULL;
 968
 969                                 } else {
 970                                         /* Count how many referral arrays we already have */
 971                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 972                                                 /* empty */;
 973                                         }
 974
 975                                         /* Add the new referral to the list */
 976                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 977                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 978
 979                                         if( lc->lconn_rebind_queue == NULL ) {
 980                                                 ld->ld_errno = LDAP_NO_MEMORY;
 981                                                 rc = -1;
 982                                                 goto done;
 983                                         }
 984                                         lc->lconn_rebind_queue[j] = refarray;
 985                                         lc->lconn_rebind_queue[j+1] = NULL;
 986                                         refarray = NULL;
 987                                 }
 988
 989                                 /* We have queued the referral/reference, now just return */
 990                                 rc = 0;
 991                                 *hadrefp = 1;
 992                                 count = 1; /* Pretend we already followed referral */
 993                                 goto done;
 994                         }
 995                 }
 996                 /* Re-encode the request with the new starting point of the search.
 997                  * Note: In the future we also need to replace the filter if one
 998                  * was provided with the search reference
 999                  */
1000
1001                 /* For references we don't want old dn if new dn empty */
1002                 if ( sref && srv->lud_dn == NULL ) {
1003                         srv->lud_dn = LDAP_STRDUP( "" );
1004                 }
1005
1006                 LDAP_NEXT_MSGID( ld, id );
1007                 ber = re_encode_request( ld, origreq->lr_ber, id,
1008                         sref, srv, &rinfo.ri_request );
1009
1010                 if( ber == NULL ) {
1011                         ld->ld_errno = LDAP_ENCODING_ERROR;
1012                         rc = -1;
1013                         goto done;
1014                 }
1015
1016                 Debug( LDAP_DEBUG_TRACE,
1017                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
1018                         lr->lr_msgid, refarray[i], 0);
1019
1020                 /* Send the new request to the server - may require a bind */
1021                 rinfo.ri_msgid = origreq->lr_origid;
1022                 rinfo.ri_url = refarray[i];
1023 #ifdef LDAP_R_COMPILE
1024                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1025 #endif
1026                 rc = ldap_send_server_request( ld, ber, id,
1027                         origreq, &srv, NULL, &rinfo );
1028 #ifdef LDAP_R_COMPILE
1029                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1030 #endif
1031                 if ( rc < 0 ) {
1032                         /* Failure, try next referral in the list */
1033                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%d: %s)\n",
1034                                 refarray[i], ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1035                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i] );
1036                         ldap_free_urllist( srv );
1037                         srv = NULL;
1038                         ld->ld_errno = LDAP_REFERRAL;
1039                 } else {
1040                         /* Success, no need to try this referral list further */
1041                         rc = 0;
1042                         ++count;
1043                         *hadrefp = 1;
1044
1045                         /* check if there is a queue of referrals that came in during bind */
1046                         if ( lc == NULL) {
1047                                 lc = find_connection( ld, srv, 1 );
1048                                 if ( lc == NULL ) {
1049                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
1050                                         rc = -1;
1051                                         goto done;
1052                                 }
1053                         }
1054
1055                         if ( lc->lconn_rebind_queue != NULL ) {
1056                                 /* Release resources of previous list */
1057                                 LDAP_VFREE( refarray );
1058                                 refarray = NULL;
1059                                 ldap_free_urllist( srv );
1060                                 srv = NULL;
1061
1062                                 /* Pull entries off end of queue so list always null terminated */
1063                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++ )
1064                                         ;
1065                                 refarray = lc->lconn_rebind_queue[j - 1];
1066                                 lc->lconn_rebind_queue[j-1] = NULL;
1067                                 /* we pulled off last entry from queue, free queue */
1068                                 if ( j == 1 ) {
1069                                         LDAP_FREE( lc->lconn_rebind_queue );
1070                                         lc->lconn_rebind_queue = NULL;
1071                                 }
1072                                 /* restart the loop the with new referral list */
1073                                 i = -1;
1074                                 continue;
1075                         }
1076                         break; /* referral followed, break out of for loop */
1077                 }
1078         } /* end for loop */
1079 done:
1080         LDAP_VFREE( refarray );
1081         ldap_free_urllist( srv );
1082         LDAP_FREE( *errstrp );
1083
1084         if( rc == 0 ) {
1085                 *errstrp = NULL;
1086                 LDAP_FREE( unfollowed );
1087                 return count;
1088         } else {
1089                 *errstrp = unfollowed;
1090                 return rc;
1091         }
1092 }
1093
1094 /*
1095  * XXX merging of errors in this routine needs to be improved
1096  */
1097 int
1098 ldap_chase_referrals( LDAP *ld,
1099         LDAPRequest *lr,
1100         char **errstrp,
1101         int sref,
1102         int *hadrefp )
1103 {
1104         int             rc, count, id;
1105         unsigned        len;
1106         char            *p, *ref, *unfollowed;
1107         LDAPRequest     *origreq;
1108         LDAPURLDesc     *srv;
1109         BerElement      *ber;
1110         LDAPreqinfo  rinfo;
1111         LDAPConn        *lc;
1112
1113         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
1114
1115         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
1116         *hadrefp = 0;
1117
1118         if ( *errstrp == NULL ) {
1119                 return( 0 );
1120         }
1121
1122         len = strlen( *errstrp );
1123         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1124                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1125                         *p = '\0';
1126                         p += LDAP_REF_STR_LEN;
1127                         break;
1128                 }
1129         }
1130
1131         if ( len < LDAP_REF_STR_LEN ) {
1132                 return( 0 );
1133         }
1134
1135         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1136                 Debug( LDAP_DEBUG_ANY,
1137                     "more than %d referral hops (dropping)\n",
1138                     ld->ld_refhoplimit, 0, 0 );
1139                     /* XXX report as error in ld->ld_errno? */
1140                     return( 0 );
1141         }
1142
1143         /* find original request */
1144         for ( origreq = lr; origreq->lr_parent != NULL;
1145              origreq = origreq->lr_parent ) {
1146                 /* empty */;
1147         }
1148
1149         unfollowed = NULL;
1150         rc = count = 0;
1151
1152         /* parse out & follow referrals */
1153         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1154                 p = strchr( ref, '\n' );
1155                 if ( p != NULL ) {
1156                         *p++ = '\0';
1157                 }
1158
1159                 rc = ldap_url_parse_ext( ref, &srv, LDAP_PVT_URL_PARSE_NOEMPTY_DN );
1160                 if ( rc != LDAP_URL_SUCCESS ) {
1161                         Debug( LDAP_DEBUG_TRACE,
1162                                 "ignoring %s referral <%s>\n",
1163                                 ref, rc == LDAP_URL_ERR_BADSCHEME ? "unknown" : "incorrect", 0 );
1164                         rc = ldap_append_referral( ld, &unfollowed, ref );
1165                         *hadrefp = 1;
1166                         continue;
1167                 }
1168
1169                 Debug( LDAP_DEBUG_TRACE,
1170                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1171
1172                 *hadrefp = 1;
1173
1174                 /* See if we've already been here */
1175                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
1176                         LDAPRequest *lp;
1177                         int looped = 0;
1178                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
1179                         for ( lp = lr; lp; lp = lp->lr_parent ) {
1180                                 if ( lp->lr_conn == lc
1181                                         && len == lp->lr_dn.bv_len )
1182                                 {
1183                                         if ( len && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) )
1184                                                         continue;
1185                                         looped = 1;
1186                                         break;
1187                                 }
1188                         }
1189                         if ( looped ) {
1190                                 ldap_free_urllist(srv);
1191                                 ld->ld_errno = LDAP_CLIENT_LOOP;
1192                                 rc = -1;
1193                                 continue;
1194                         }
1195                 }
1196
1197                 LDAP_NEXT_MSGID( ld, id );
1198                 ber = re_encode_request( ld, origreq->lr_ber,
1199                     id, sref, srv, &rinfo.ri_request );
1200
1201                 if ( ber == NULL ) {
1202                         return -1 ;
1203                 }
1204
1205                 /* copy the complete referral for rebind process */
1206                 rinfo.ri_url = LDAP_STRDUP( ref );
1207
1208                 rinfo.ri_msgid = origreq->lr_origid;
1209
1210 #ifdef LDAP_R_COMPILE
1211                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1212 #endif
1213                 rc = ldap_send_server_request( ld, ber, id,
1214                         lr, &srv, NULL, &rinfo );
1215 #ifdef LDAP_R_COMPILE
1216                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1217 #endif
1218
1219                 LDAP_FREE( rinfo.ri_url );
1220
1221                 if( rc >= 0 ) {
1222                         ++count;
1223                 } else {
1224                         Debug( LDAP_DEBUG_ANY,
1225                                 "Unable to chase referral \"%s\" (%d: %s)\n",
1226                                 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1227                         rc = ldap_append_referral( ld, &unfollowed, ref );
1228                 }
1229
1230                 ldap_free_urllist(srv);
1231         }
1232
1233         LDAP_FREE( *errstrp );
1234         *errstrp = unfollowed;
1235
1236         return(( rc == 0 ) ? count : rc );
1237 }
1238
1239
1240 int
1241 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1242 {
1243         int     first;
1244
1245         if ( *referralsp == NULL ) {
1246                 first = 1;
1247                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1248                     + 1 );
1249         } else {
1250                 first = 0;
1251                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1252                     strlen( *referralsp ) + strlen( s ) + 2 );
1253         }
1254
1255         if ( *referralsp == NULL ) {
1256                 ld->ld_errno = LDAP_NO_MEMORY;
1257                 return( -1 );
1258         }
1259
1260         if ( first ) {
1261                 strcpy( *referralsp, LDAP_REF_STR );
1262         } else {
1263                 strcat( *referralsp, "\n" );
1264         }
1265         strcat( *referralsp, s );
1266
1267         return( 0 );
1268 }
1269
1270
1271
1272 static BerElement *
1273 re_encode_request( LDAP *ld,
1274         BerElement *origber,
1275         ber_int_t msgid,
1276         int sref,
1277         LDAPURLDesc *srv,
1278         int *type )
1279 {
1280         /*
1281          * XXX this routine knows way too much about how the lber library works!
1282          */
1283         ber_int_t       along;
1284         ber_tag_t       tag;
1285         ber_tag_t       rtag;
1286         ber_int_t       ver;
1287         ber_int_t       scope;
1288         int             rc;
1289         BerElement      tmpber, *ber;
1290         struct berval           dn;
1291
1292         Debug( LDAP_DEBUG_TRACE,
1293             "re_encode_request: new msgid %ld, new dn <%s>\n",
1294             (long) msgid,
1295                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1296
1297         tmpber = *origber;
1298
1299         /*
1300          * all LDAP requests are sequences that start with a message id.
1301          * For all except delete, this is followed by a sequence that is
1302          * tagged with the operation code.  For delete, the provided DN
1303          * is not wrapped by a sequence.
1304          */
1305         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1306
1307         if ( rtag == LBER_ERROR ) {
1308                 ld->ld_errno = LDAP_DECODING_ERROR;
1309                 return( NULL );
1310         }
1311
1312         assert( tag != 0);
1313         if ( tag == LDAP_REQ_BIND ) {
1314                 /* bind requests have a version number before the DN & other stuff */
1315                 rtag = ber_scanf( &tmpber, "{im" /*}*/, &ver, &dn );
1316
1317         } else if ( tag == LDAP_REQ_DELETE ) {
1318                 /* delete requests don't have a DN wrapping sequence */
1319                 rtag = ber_scanf( &tmpber, "m", &dn );
1320
1321         } else if ( tag == LDAP_REQ_SEARCH ) {
1322                 /* search requests need to be re-scope-ed */
1323                 rtag = ber_scanf( &tmpber, "{me" /*"}"*/, &dn, &scope );
1324
1325                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1326                         /* use the scope provided in reference */
1327                         scope = srv->lud_scope;
1328
1329                 } else if ( sref ) {
1330                         /* use scope implied by previous operation
1331                          *   base -> base
1332                          *   one -> base
1333                          *   subtree -> subtree
1334                          *   subordinate -> subtree
1335                          */
1336                         switch( scope ) {
1337                         default:
1338                         case LDAP_SCOPE_BASE:
1339                         case LDAP_SCOPE_ONELEVEL:
1340                                 scope = LDAP_SCOPE_BASE;
1341                                 break;
1342                         case LDAP_SCOPE_SUBTREE:
1343                         case LDAP_SCOPE_SUBORDINATE:
1344                                 scope = LDAP_SCOPE_SUBTREE;
1345                                 break;
1346                         }
1347                 }
1348
1349         } else {
1350                 rtag = ber_scanf( &tmpber, "{m" /*}*/, &dn );
1351         }
1352
1353         if( rtag == LBER_ERROR ) {
1354                 ld->ld_errno = LDAP_DECODING_ERROR;
1355                 return NULL;
1356         }
1357
1358         /* restore character zero'd out by ber_scanf*/
1359         dn.bv_val[dn.bv_len] = tmpber.ber_tag;
1360
1361         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1362                 return NULL;
1363         }
1364
1365         if ( srv->lud_dn ) {
1366                 ber_str2bv( srv->lud_dn, 0, 0, &dn );
1367         }
1368
1369         if ( tag == LDAP_REQ_BIND ) {
1370                 rc = ber_printf( ber, "{it{iO" /*}}*/, msgid, tag, ver, &dn );
1371         } else if ( tag == LDAP_REQ_DELETE ) {
1372                 rc = ber_printf( ber, "{itON}", msgid, tag, &dn );
1373         } else if ( tag == LDAP_REQ_SEARCH ) {
1374                 rc = ber_printf( ber, "{it{Oe" /*}}*/, msgid, tag, &dn, scope );
1375         } else {
1376                 rc = ber_printf( ber, "{it{O" /*}}*/, msgid, tag, &dn );
1377         }
1378
1379         if ( rc == -1 ) {
1380                 ld->ld_errno = LDAP_ENCODING_ERROR;
1381                 ber_free( ber, 1 );
1382                 return NULL;
1383         }
1384
1385         if ( tag != LDAP_REQ_DELETE && (
1386                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1387                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1388             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1389         {
1390                 ld->ld_errno = LDAP_ENCODING_ERROR;
1391                 ber_free( ber, 1 );
1392                 return NULL;
1393         }
1394
1395 #ifdef LDAP_DEBUG
1396         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1397                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1398                     0, 0, 0 );
1399                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1400         }
1401 #endif /* LDAP_DEBUG */
1402
1403         *type = tag;    /* return request type */
1404         return ber;
1405 }
1406
1407
1408 LDAPRequest *
1409 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1410 {
1411         LDAPRequest     *lr;
1412
1413 #ifdef LDAP_R_COMPILE
1414         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1415 #endif
1416         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1417                 if ( lr->lr_status == LDAP_REQST_COMPLETED ) {
1418                         continue;       /* Skip completed requests */
1419                 }
1420                 if ( msgid == lr->lr_msgid ) {
1421                         break;
1422                 }
1423         }
1424 #ifdef LDAP_R_COMPILE
1425         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1426 #endif
1427
1428         return( lr );
1429 }
1430
1431