2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2005 The OpenLDAP Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted only as authorized by the OpenLDAP
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>.
15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
16 * All rights reserved.
18 /* This notice applies to changes, created by or for Novell, Inc.,
19 * to preexisting works for which notices appear elsewhere in this file.
21 * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
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.
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
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.
45 #include <ac/stdlib.h>
48 #include <ac/socket.h>
49 #include <ac/string.h>
51 #include <ac/unistd.h>
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 ));
61 re_encode_request( LDAP *ld,
69 ldap_alloc_ber_with_options( LDAP *ld )
73 if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
74 ld->ld_errno = LDAP_NO_MEMORY;
82 ldap_set_ber_options( LDAP *ld, BerElement *ber )
84 ber->ber_options = ld->ld_lberoptions;
89 ldap_send_initial_request(
99 Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
101 if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
102 /* not connected yet */
103 int rc = ldap_open_defconn( ld );
110 Debug( LDAP_DEBUG_TRACE,
111 "ldap_open_defconn: successful\n",
117 * use of DNS is turned off or this is an X.500 DN...
118 * use our default connection
123 #ifdef LDAP_CONNECTIONLESS
124 if (LDAP_IS_UDP(ld)) {
125 if (msgtype == LDAP_REQ_BIND) {
126 if (ld->ld_options.ldo_cldapdn)
127 ldap_memfree(ld->ld_options.ldo_cldapdn);
128 ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
131 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
132 return LDAP_PARAM_ERROR;
135 #ifdef LDAP_R_COMPILE
136 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
138 rc = ldap_send_server_request( ld, ber, msgid, NULL,
139 servers, NULL, NULL );
140 #ifdef LDAP_R_COMPILE
141 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
144 ldap_free_urllist(servers);
150 ldap_int_flush_request(
154 LDAPConn *lc = lr->lr_conn;
156 if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
157 if ( errno == EAGAIN ) {
158 /* need to continue write later */
159 lr->lr_status = LDAP_REQST_WRITING;
160 ldap_mark_select_write( ld, lc->lconn_sb );
161 ld->ld_errno = LDAP_BUSY;
164 ld->ld_errno = LDAP_SERVER_DOWN;
165 ldap_free_request( ld, lr );
166 ldap_free_connection( ld, lc, 0, 0 );
170 if ( lr->lr_parent == NULL ) {
171 lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
172 lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
174 lr->lr_status = LDAP_REQST_INPROGRESS;
176 /* sent -- waiting for a response */
177 ldap_mark_select_read( ld, lc->lconn_sb );
183 ldap_send_server_request(
187 LDAPRequest *parentreq,
188 LDAPURLDesc *srvlist,
195 Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
198 ld->ld_errno = LDAP_SUCCESS; /* optimistic */
201 if ( srvlist == NULL ) {
204 lc = find_connection( ld, srvlist, 1 );
206 if ( (bind != NULL) && (parentreq != NULL) ) {
207 /* Remember the bind in the parent */
209 ++parentreq->lr_outrefcnt;
211 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
216 if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
218 if ( ld->ld_errno == LDAP_SUCCESS ) {
219 ld->ld_errno = LDAP_SERVER_DOWN;
222 /* Forget about the bind */
223 --parentreq->lr_outrefcnt;
228 use_connection( ld, lc );
230 /* If we still have an incomplete write, try to finish it before
231 * dealing with the new request. If we don't finish here, return
232 * LDAP_BUSY and let the caller retry later. We only allow a single
233 * request to be in WRITING state.
236 if ( ld->ld_requests &&
237 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
238 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
244 lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
246 ld->ld_errno = LDAP_NO_MEMORY;
247 ldap_free_connection( ld, lc, 0, 0 );
250 /* Forget about the bind */
251 --parentreq->lr_outrefcnt;
255 lr->lr_msgid = msgid;
256 lr->lr_status = LDAP_REQST_INPROGRESS;
257 lr->lr_res_errno = LDAP_SUCCESS; /* optimistic */
260 if ( parentreq != NULL ) { /* sub-request */
262 /* Increment if we didn't do it before the bind */
263 ++parentreq->lr_outrefcnt;
265 lr->lr_origid = parentreq->lr_origid;
266 lr->lr_parentcnt = ++parentreq->lr_parentcnt;
267 lr->lr_parent = parentreq;
268 lr->lr_refnext = parentreq->lr_child;
269 parentreq->lr_child = lr;
270 } else { /* original request */
271 lr->lr_origid = lr->lr_msgid;
274 /* Extract requestDN for future reference */
276 BerElement tmpber = *ber;
280 ber_reset( &tmpber, 1 );
281 rtag = ber_scanf( &tmpber, "{it", /*}*/ &bint, &tag );
284 rtag = ber_scanf( &tmpber, "{i" /*}*/, &bint );
286 case LDAP_REQ_DELETE:
289 rtag = ber_scanf( &tmpber, "{" /*}*/ );
290 case LDAP_REQ_ABANDON:
293 if ( tag != LDAP_REQ_ABANDON ) {
294 ber_skip_tag( &tmpber, &lr->lr_dn.bv_len );
295 lr->lr_dn.bv_val = tmpber.ber_ptr;
300 if (( lr->lr_next = ld->ld_requests ) != NULL ) {
301 lr->lr_next->lr_prev = lr;
303 ld->ld_requests = lr;
305 ld->ld_errno = LDAP_SUCCESS;
306 if ( ldap_int_flush_request( ld, lr ) == -1 ) {
314 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
315 int connect, LDAPreqinfo *bind )
320 Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
321 use_ldsb, connect, (bind != NULL) );
323 * make a new LDAP server connection
324 * XXX open connection synchronously for now
326 lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
328 ld->ld_errno = LDAP_NO_MEMORY;
333 assert( ld->ld_sb != NULL );
334 lc->lconn_sb = ld->ld_sb;
337 lc->lconn_sb = ber_sockbuf_alloc();
338 if ( lc->lconn_sb == NULL ) {
339 LDAP_FREE( (char *)lc );
340 ld->ld_errno = LDAP_NO_MEMORY;
346 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
347 if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 )
355 ber_sockbuf_free( lc->lconn_sb );
357 LDAP_FREE( (char *)lc );
358 ld->ld_errno = LDAP_SERVER_DOWN;
362 lc->lconn_server = ldap_url_dup( srv );
365 lc->lconn_status = LDAP_CONNST_CONNECTED;
366 lc->lconn_next = ld->ld_conns;
370 * XXX for now, we always do a synchronous bind. This will have
371 * to change in the long run...
375 LDAPConn *savedefconn;
377 /* Set flag to prevent additional referrals
378 * from being processed on this
379 * connection until the bind has completed
381 lc->lconn_rebind_inprogress = 1;
382 /* V3 rebind function */
383 if ( ld->ld_rebind_proc != NULL) {
384 LDAPURLDesc *srvfunc;
386 srvfunc = ldap_url_dup( srvlist );
387 if ( srvfunc == NULL ) {
388 ld->ld_errno = LDAP_NO_MEMORY;
391 savedefconn = ld->ld_defconn;
392 ++lc->lconn_refcnt; /* avoid premature free */
395 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
396 #ifdef LDAP_R_COMPILE
397 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
398 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
400 err = (*ld->ld_rebind_proc)( ld,
401 bind->ri_url, bind->ri_request, bind->ri_msgid,
402 ld->ld_rebind_params );
403 #ifdef LDAP_R_COMPILE
404 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
405 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
408 ld->ld_defconn = savedefconn;
413 ldap_free_connection( ld, lc, 1, 0 );
416 ldap_free_urldesc( srvfunc );
419 savedefconn = ld->ld_defconn;
420 ++lc->lconn_refcnt; /* avoid premature free */
423 Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
424 #ifdef LDAP_R_COMPILE
425 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
426 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
428 if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
431 #ifdef LDAP_R_COMPILE
432 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
433 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
435 ld->ld_defconn = savedefconn;
439 ldap_free_connection( ld, lc, 1, 0 );
444 lc->lconn_rebind_inprogress = 0;
452 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
454 * return an existing connection (if any) to the server srv
455 * if "any" is non-zero, check for any server in the "srv" chain
459 LDAPURLDesc *lcu, *lsu;
460 int lcu_port, lsu_port;
462 for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
463 lcu = lc->lconn_server;
464 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
467 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
468 lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
471 if ( strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
472 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
473 && lsu->lud_host != NULL && *lsu->lud_host != '\0'
474 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0
475 && lsu_port == lcu_port )
490 use_connection( LDAP *ld, LDAPConn *lc )
493 lc->lconn_lastused = time( NULL );
498 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
500 LDAPConn *tmplc, *prevlc;
502 Debug( LDAP_DEBUG_TRACE,
503 "ldap_free_connection %d %d\n",
506 if ( force || --lc->lconn_refcnt <= 0 ) {
507 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
508 ldap_mark_select_clear( ld, lc->lconn_sb );
510 ldap_send_unbind( ld, lc->lconn_sb,
515 if ( lc->lconn_ber != NULL ) {
516 ber_free( lc->lconn_ber, 1 );
519 ldap_int_sasl_close( ld, lc );
522 for ( tmplc = ld->ld_conns;
524 tmplc = tmplc->lconn_next )
527 if ( prevlc == NULL ) {
528 ld->ld_conns = tmplc->lconn_next;
530 prevlc->lconn_next = tmplc->lconn_next;
536 ldap_free_urllist( lc->lconn_server );
537 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
538 if ( lc->lconn_krbinstance != NULL ) {
539 LDAP_FREE( lc->lconn_krbinstance );
543 /* FIXME: is this at all possible? */
547 for ( lr = ld->ld_requests; lr; ) {
548 LDAPRequest *lr_next = lr->lr_next;
550 if ( lr->lr_conn == lc ) {
551 ldap_free_request_int( ld, lr );
557 if ( lc->lconn_sb != ld->ld_sb ) {
558 ber_sockbuf_free( lc->lconn_sb );
560 if ( lc->lconn_rebind_queue != NULL) {
562 for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
563 LDAP_VFREE( lc->lconn_rebind_queue[i] );
565 LDAP_FREE( lc->lconn_rebind_queue );
568 Debug( LDAP_DEBUG_TRACE,
569 "ldap_free_connection: actually freed\n",
572 lc->lconn_lastused = time( NULL );
573 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
574 lc->lconn_refcnt, 0, 0 );
581 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
586 fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
587 for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
588 if ( lc->lconn_server != NULL ) {
589 fprintf( stderr, "* host: %s port: %d%s\n",
590 ( lc->lconn_server->lud_host == NULL ) ? "(null)"
591 : lc->lconn_server->lud_host,
592 lc->lconn_server->lud_port, ( lc->lconn_sb ==
593 ld->ld_sb ) ? " (default)" : "" );
595 fprintf( stderr, " refcnt: %d status: %s\n", lc->lconn_refcnt,
596 ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
597 "NeedSocket" : ( lc->lconn_status ==
598 LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
599 fprintf( stderr, " last used: %s",
600 ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
601 if( lc->lconn_rebind_inprogress ) {
602 fprintf( stderr, " rebind in progress\n");
603 if( lc->lconn_rebind_queue != NULL) {
605 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
607 for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
608 fprintf( stderr, " queue %d entry %d - %s\n",
609 i, j, lc->lconn_rebind_queue[i][j]);
613 fprintf( stderr, " queue is empty\n");
616 fprintf(stderr, "\n");
625 ldap_dump_requests_and_responses( LDAP *ld )
630 #ifdef LDAP_R_COMPILE
631 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
633 fprintf( stderr, "** Outstanding Requests:\n" );
634 if (( lr = ld->ld_requests ) == NULL ) {
635 fprintf( stderr, " Empty\n" );
637 for ( ; lr != NULL; lr = lr->lr_next ) {
638 fprintf( stderr, " * msgid %d, origid %d, status %s\n",
639 lr->lr_msgid, lr->lr_origid,
640 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
641 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
642 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
643 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
644 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
645 fprintf( stderr, " outstanding referrals %d, parent count %d\n",
646 lr->lr_outrefcnt, lr->lr_parentcnt );
648 #ifdef LDAP_R_COMPILE
649 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
651 fprintf( stderr, "** Response Queue:\n" );
652 if (( lm = ld->ld_responses ) == NULL ) {
653 fprintf( stderr, " Empty\n" );
655 for ( ; lm != NULL; lm = lm->lm_next ) {
656 fprintf( stderr, " * msgid %d, type %lu\n",
657 lm->lm_msgid, (unsigned long) lm->lm_msgtype );
658 if (( l = lm->lm_chain ) != NULL ) {
659 fprintf( stderr, " chained responses:\n" );
660 for ( ; l != NULL; l = l->lm_chain ) {
662 " * msgid %d, type %lu\n",
664 (unsigned long) l->lm_msgtype );
669 #endif /* LDAP_DEBUG */
672 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
674 if ( lr->lr_prev == NULL ) {
675 /* free'ing the first request? */
676 assert( ld->ld_requests == lr );
677 ld->ld_requests = lr->lr_next;
680 lr->lr_prev->lr_next = lr->lr_next;
683 if ( lr->lr_next != NULL ) {
684 lr->lr_next->lr_prev = lr->lr_prev;
687 if ( lr->lr_ber != NULL ) {
688 ber_free( lr->lr_ber, 1 );
691 if ( lr->lr_res_error != NULL ) {
692 LDAP_FREE( lr->lr_res_error );
695 if ( lr->lr_res_matched != NULL ) {
696 LDAP_FREE( lr->lr_res_matched );
703 ldap_free_request( LDAP *ld, LDAPRequest *lr )
705 LDAPRequest **ttmplr;
707 Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
708 lr->lr_origid, lr->lr_msgid, 0 );
710 /* free all referrals (child requests) */
711 while ( lr->lr_child )
712 ldap_free_request( ld, lr->lr_child );
714 if ( lr->lr_parent != NULL ) {
715 --lr->lr_parent->lr_outrefcnt;
716 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
718 *ttmplr = lr->lr_refnext;
720 ldap_free_request_int( ld, lr );
724 * call first time with *cntp = -1
725 * when returns *cntp == -1, no referrals are left
727 * NOTE: may replace *refsp, or shuffle the contents
728 * of the original array.
730 static int ldap_int_nextref(
736 assert( refsp != NULL );
737 assert( *refsp != NULL );
738 assert( cntp != NULL );
747 if ( (*refsp)[ *cntp ] == NULL ) {
758 * (IN) ld = LDAP connection handle
759 * (IN) lr = LDAP Request structure
760 * (IN) refs = array of pointers to referral strings that we will chase
761 * The array will be free'd by this function when no longer needed
762 * (IN) sref != 0 if following search reference
763 * (OUT) errstrp = Place to return a string of referrals which could not be followed
764 * (OUT) hadrefp = 1 if sucessfully followed referral
766 * Return value - number of referrals followed
769 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
772 int unfollowedcnt = 0;
773 LDAPRequest *origreq;
774 LDAPURLDesc *srv = NULL;
776 char **refarray = NULL;
778 int rc, count, i, j, id;
781 ld->ld_errno = LDAP_SUCCESS; /* optimistic */
784 Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
789 /* If no referrals in array, return */
790 if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
795 /* Check for hop limit exceeded */
796 if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
797 Debug( LDAP_DEBUG_ANY,
798 "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
799 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
804 /* find original request */
806 origreq->lr_parent != NULL;
807 origreq = origreq->lr_parent )
815 if ( ld->ld_nextref_proc == NULL ) {
816 ld->ld_nextref_proc = ldap_int_nextref;
819 /* parse out & follow referrals */
821 for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
823 ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
826 /* Parse the referral URL */
827 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
833 if( srv->lud_crit_exts ) {
834 /* we do not support any extensions */
835 ld->ld_errno = LDAP_NOT_SUPPORTED;
840 /* treat ldap://hostpart and ldap://hostpart/ the same */
841 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
842 LDAP_FREE( srv->lud_dn );
846 /* check connection for re-bind in progress */
847 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
848 /* See if we've already requested this DN with this conn */
851 int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
852 for (lp = origreq; lp; ) {
853 if ( lp->lr_conn == lc ) {
854 if ( len == lp->lr_dn.bv_len ) {
855 if ( len && strncmp( srv->lud_dn, lp->lr_dn.bv_val,
868 ldap_free_urllist( srv );
870 ld->ld_errno = LDAP_CLIENT_LOOP;
875 if( lc->lconn_rebind_inprogress) {
876 /* We are already chasing a referral or search reference and a
877 * bind on that connection is in progress. We must queue
878 * referrals on that connection, so we don't get a request
879 * going out before the bind operation completes. This happens
880 * if two search references come in one behind the other
881 * for the same server with different contexts.
883 Debug( LDAP_DEBUG_TRACE,
884 "ldap_chase_v3referrals: queue referral \"%s\"\n",
886 if( lc->lconn_rebind_queue == NULL ) {
887 /* Create a referral list */
888 lc->lconn_rebind_queue =
889 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
891 if( lc->lconn_rebind_queue == NULL) {
892 ld->ld_errno = LDAP_NO_MEMORY;
897 lc->lconn_rebind_queue[0] = refarray;
898 lc->lconn_rebind_queue[1] = NULL;
902 /* Count how many referral arrays we already have */
903 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
907 /* Add the new referral to the list */
908 lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
909 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
911 if( lc->lconn_rebind_queue == NULL ) {
912 ld->ld_errno = LDAP_NO_MEMORY;
916 lc->lconn_rebind_queue[j] = refarray;
917 lc->lconn_rebind_queue[j+1] = NULL;
921 /* We have queued the referral/reference, now just return */
924 count = 1; /* Pretend we already followed referral */
928 /* Re-encode the request with the new starting point of the search.
929 * Note: In the future we also need to replace the filter if one
930 * was provided with the search reference
933 /* For references we don't want old dn if new dn empty */
934 if ( sref && srv->lud_dn == NULL ) {
935 srv->lud_dn = LDAP_STRDUP( "" );
938 LDAP_NEXT_MSGID( ld, id );
939 ber = re_encode_request( ld, origreq->lr_ber, id,
940 sref, srv, &rinfo.ri_request );
943 ld->ld_errno = LDAP_ENCODING_ERROR;
948 Debug( LDAP_DEBUG_TRACE,
949 "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
950 lr->lr_msgid, refarray[i], 0);
952 /* Send the new request to the server - may require a bind */
953 rinfo.ri_msgid = origreq->lr_origid;
954 rinfo.ri_url = refarray[i];
955 #ifdef LDAP_R_COMPILE
956 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
958 rc = ldap_send_server_request( ld, ber, id,
959 origreq, srv, NULL, &rinfo );
960 #ifdef LDAP_R_COMPILE
961 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
964 /* Failure, try next referral in the list */
965 Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%d: %s)\n",
966 refarray[i], ld->ld_errno, ldap_err2string( ld->ld_errno ) );
967 unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i] );
968 ldap_free_urllist( srv );
970 ld->ld_errno = LDAP_REFERRAL;
972 /* Success, no need to try this referral list further */
977 /* check if there is a queue of referrals that came in during bind */
979 lc = find_connection( ld, srv, 1 );
981 ld->ld_errno = LDAP_OPERATIONS_ERROR;
987 if ( lc->lconn_rebind_queue != NULL ) {
988 /* Release resources of previous list */
989 LDAP_VFREE( refarray );
991 ldap_free_urllist( srv );
994 /* Pull entries off end of queue so list always null terminated */
995 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++ )
997 refarray = lc->lconn_rebind_queue[j - 1];
998 lc->lconn_rebind_queue[j-1] = NULL;
999 /* we pulled off last entry from queue, free queue */
1001 LDAP_FREE( lc->lconn_rebind_queue );
1002 lc->lconn_rebind_queue = NULL;
1004 /* restart the loop the with new referral list */
1008 break; /* referral followed, break out of for loop */
1010 } /* end for loop */
1012 LDAP_VFREE( refarray );
1013 ldap_free_urllist( srv );
1014 LDAP_FREE( *errstrp );
1018 LDAP_FREE( unfollowed );
1021 *errstrp = unfollowed;
1027 * XXX merging of errors in this routine needs to be improved
1030 ldap_chase_referrals( LDAP *ld,
1038 char *p, *ref, *unfollowed;
1039 LDAPRequest *origreq;
1045 Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
1047 ld->ld_errno = LDAP_SUCCESS; /* optimistic */
1050 if ( *errstrp == NULL ) {
1054 len = strlen( *errstrp );
1055 for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1056 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1058 p += LDAP_REF_STR_LEN;
1063 if ( len < LDAP_REF_STR_LEN ) {
1067 if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1068 Debug( LDAP_DEBUG_ANY,
1069 "more than %d referral hops (dropping)\n",
1070 ld->ld_refhoplimit, 0, 0 );
1071 /* XXX report as error in ld->ld_errno? */
1075 /* find original request */
1076 for ( origreq = lr; origreq->lr_parent != NULL;
1077 origreq = origreq->lr_parent ) {
1084 /* parse out & follow referrals */
1085 for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1086 p = strchr( ref, '\n' );
1091 rc = ldap_url_parse_ext( ref, &srv );
1093 if ( rc != LDAP_URL_SUCCESS ) {
1094 Debug( LDAP_DEBUG_TRACE,
1095 "ignoring unknown referral <%s>\n", ref, 0, 0 );
1096 rc = ldap_append_referral( ld, &unfollowed, ref );
1101 if ( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1102 LDAP_FREE( srv->lud_dn );
1106 Debug( LDAP_DEBUG_TRACE,
1107 "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1111 /* See if we've already been here */
1112 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
1115 int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
1116 for (lp = lr; lp; lp = lp->lr_parent ) {
1117 if ( lp->lr_conn == lc ) {
1118 if ( len == lp->lr_dn.bv_len ) {
1119 if ( len && strncmp( srv->lud_dn, lp->lr_dn.bv_val,
1128 ldap_free_urllist(srv);
1129 ld->ld_errno = LDAP_CLIENT_LOOP;
1135 LDAP_NEXT_MSGID( ld, id );
1136 ber = re_encode_request( ld, origreq->lr_ber,
1137 id, sref, srv, &rinfo.ri_request );
1139 if ( ber == NULL ) {
1143 /* copy the complete referral for rebind process */
1144 rinfo.ri_url = LDAP_STRDUP( ref );
1146 rinfo.ri_msgid = origreq->lr_origid;
1148 #ifdef LDAP_R_COMPILE
1149 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1151 rc = ldap_send_server_request( ld, ber, id,
1152 lr, srv, NULL, &rinfo );
1153 #ifdef LDAP_R_COMPILE
1154 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1157 LDAP_FREE( rinfo.ri_url );
1162 Debug( LDAP_DEBUG_ANY,
1163 "Unable to chase referral \"%s\" (%d: %s)\n",
1164 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1165 rc = ldap_append_referral( ld, &unfollowed, ref );
1168 ldap_free_urllist(srv);
1171 LDAP_FREE( *errstrp );
1172 *errstrp = unfollowed;
1174 return(( rc == 0 ) ? count : rc );
1179 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1183 if ( *referralsp == NULL ) {
1185 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1189 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1190 strlen( *referralsp ) + strlen( s ) + 2 );
1193 if ( *referralsp == NULL ) {
1194 ld->ld_errno = LDAP_NO_MEMORY;
1199 strcpy( *referralsp, LDAP_REF_STR );
1201 strcat( *referralsp, "\n" );
1203 strcat( *referralsp, s );
1211 re_encode_request( LDAP *ld,
1212 BerElement *origber,
1219 * XXX this routine knows way too much about how the lber library works!
1227 BerElement tmpber, *ber;
1228 struct berval orig_dn;
1231 Debug( LDAP_DEBUG_TRACE,
1232 "re_encode_request: new msgid %ld, new dn <%s>\n",
1234 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1239 * all LDAP requests are sequences that start with a message id.
1240 * For all except delete, this is followed by a sequence that is
1241 * tagged with the operation code. For delete, the provided DN
1242 * is not wrapped by a sequence.
1244 rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1246 if ( rtag == LBER_ERROR ) {
1247 ld->ld_errno = LDAP_DECODING_ERROR;
1252 if ( tag == LDAP_REQ_BIND ) {
1253 /* bind requests have a version number before the DN & other stuff */
1254 rtag = ber_scanf( &tmpber, "{im" /*}*/, &ver, &orig_dn );
1256 } else if ( tag == LDAP_REQ_DELETE ) {
1257 /* delete requests don't have a DN wrapping sequence */
1258 rtag = ber_scanf( &tmpber, "m", &orig_dn );
1260 } else if ( tag == LDAP_REQ_SEARCH ) {
1261 /* search requests need to be re-scope-ed */
1262 rtag = ber_scanf( &tmpber, "{me" /*"}"*/, &orig_dn, &scope );
1264 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1265 /* use the scope provided in reference */
1266 scope = srv->lud_scope;
1268 } else if ( sref ) {
1269 /* use scope implied by previous operation
1272 * subtree -> subtree
1273 * subordinate -> subtree
1277 case LDAP_SCOPE_BASE:
1278 case LDAP_SCOPE_ONELEVEL:
1279 scope = LDAP_SCOPE_BASE;
1281 case LDAP_SCOPE_SUBTREE:
1282 #ifdef LDAP_SCOPE_SUBORDINATE
1283 case LDAP_SCOPE_SUBORDINATE:
1285 scope = LDAP_SCOPE_SUBTREE;
1291 rtag = ber_scanf( &tmpber, "{m" /*}*/, &orig_dn );
1294 if( rtag == LBER_ERROR ) {
1295 ld->ld_errno = LDAP_DECODING_ERROR;
1299 if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1303 if ( srv->lud_dn == NULL ) {
1304 dn = orig_dn.bv_val;
1309 if ( tag == LDAP_REQ_BIND ) {
1310 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1311 } else if ( tag == LDAP_REQ_DELETE ) {
1312 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1313 } else if ( tag == LDAP_REQ_SEARCH ) {
1314 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1316 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1320 ld->ld_errno = LDAP_ENCODING_ERROR;
1325 if ( tag != LDAP_REQ_DELETE && (
1326 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1327 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1328 ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1330 ld->ld_errno = LDAP_ENCODING_ERROR;
1336 if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1337 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1339 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1341 #endif /* LDAP_DEBUG */
1343 *type = tag; /* return request type */
1349 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1353 #ifdef LDAP_R_COMPILE
1354 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1356 for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1357 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1358 continue; /* Skip completed requests */
1360 if ( msgid == lr->lr_msgid ) {
1364 #ifdef LDAP_R_COMPILE
1365 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );