3 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
7 * Copyright (c) 1995 Regents of the University of Michigan.
11 * This notice applies to changes, created by or for Novell, Inc.,
12 * to preexisting works for which notices appear elsewhere in this file.
14 * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
16 * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
17 * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
18 * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
19 * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
20 * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
21 * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
22 * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
23 * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
25 * Modification to OpenLDAP source by Novell, Inc.
26 * April 2000 sfs Added code to chase V3 referrals
27 * request.c - sending of ldap requests; handling of referrals
34 #include <ac/stdlib.h>
37 #include <ac/socket.h>
38 #include <ac/string.h>
40 #include <ac/unistd.h>
45 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
46 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
49 re_encode_request( LDAP *ld,
57 ldap_alloc_ber_with_options( LDAP *ld )
61 if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
62 ld->ld_errno = LDAP_NO_MEMORY;
70 ldap_set_ber_options( LDAP *ld, BerElement *ber )
72 ber->ber_options = ld->ld_lberoptions;
77 ldap_send_initial_request(
86 Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
88 if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
89 /* not connected yet */
90 int rc = ldap_open_defconn( ld );
97 Debug( LDAP_DEBUG_TRACE,
98 "ldap_open_defconn: successful\n",
104 * use of DNS is turned off or this is an X.500 DN...
105 * use our default connection
110 #ifdef LDAP_CONNECTIONLESS
111 if (LDAP_IS_UDP(ld)) {
112 if (msgtype == LDAP_REQ_BIND) {
113 if (ld->ld_options.ldo_cldapdn)
114 ldap_memfree(ld->ld_options.ldo_cldapdn);
115 ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
118 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
119 return LDAP_PARAM_ERROR;
122 rc = ldap_send_server_request( ld, ber, ld->ld_msgid, NULL,
123 servers, NULL, NULL );
125 ldap_free_urllist(servers);
132 ldap_send_server_request(
136 LDAPRequest *parentreq,
137 LDAPURLDesc *srvlist,
144 Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
147 ld->ld_errno = LDAP_SUCCESS; /* optimistic */
150 if ( srvlist == NULL ) {
153 if (( lc = find_connection( ld, srvlist, 1 )) ==
155 if ( (bind != NULL) && (parentreq != NULL) ) {
156 /* Remember the bind in the parent */
158 ++parentreq->lr_outrefcnt;
160 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
165 if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
167 if ( ld->ld_errno == LDAP_SUCCESS ) {
168 ld->ld_errno = LDAP_SERVER_DOWN;
171 /* Forget about the bind */
172 --parentreq->lr_outrefcnt;
177 use_connection( ld, lc );
178 if (( lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ))) ==
180 ld->ld_errno = LDAP_NO_MEMORY;
181 ldap_free_connection( ld, lc, 0, 0 );
184 /* Forget about the bind */
185 --parentreq->lr_outrefcnt;
189 lr->lr_msgid = msgid;
190 lr->lr_status = LDAP_REQST_INPROGRESS;
191 lr->lr_res_errno = LDAP_SUCCESS; /* optimistic */
194 if ( parentreq != NULL ) { /* sub-request */
196 /* Increment if we didn't do it before the bind */
197 ++parentreq->lr_outrefcnt;
199 lr->lr_origid = parentreq->lr_origid;
200 lr->lr_parentcnt = parentreq->lr_parentcnt + 1;
201 lr->lr_parent = parentreq;
202 lr->lr_refnext = parentreq->lr_child;
203 parentreq->lr_child = lr;
204 } else { /* original request */
205 lr->lr_origid = lr->lr_msgid;
208 if (( lr->lr_next = ld->ld_requests ) != NULL ) {
209 lr->lr_next->lr_prev = lr;
211 ld->ld_requests = lr;
214 if ( ber_flush( lc->lconn_sb, ber, 0 ) != 0 ) {
216 if ( errno == EWOULDBLOCK ) {
217 /* need to continue write later */
218 lr->lr_status = LDAP_REQST_WRITING;
219 ldap_mark_select_write( ld, lc->lconn_sb );
222 ld->ld_errno = LDAP_SERVER_DOWN;
223 ldap_free_request( ld, lr );
224 ldap_free_connection( ld, lc, 0, 0 );
231 if ( parentreq == NULL ) {
232 ber->ber_end = ber->ber_ptr;
233 ber->ber_ptr = ber->ber_buf;
236 /* sent -- waiting for a response */
237 ldap_mark_select_read( ld, lc->lconn_sb );
240 ld->ld_errno = LDAP_SUCCESS;
245 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
246 int connect, LDAPreqinfo *bind )
252 Debug( LDAP_DEBUG_TRACE, "ldap_new_connection\n", 0, 0, 0 );
254 * make a new LDAP server connection
255 * XXX open connection synchronously for now
257 if (( lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ))) == NULL ||
258 ( !use_ldsb && ( (sb = ber_sockbuf_alloc()) == NULL ))) {
260 LDAP_FREE( (char *)lc );
262 ld->ld_errno = LDAP_NO_MEMORY;
266 lc->lconn_sb = ( use_ldsb ) ? ld->ld_sb : sb;
269 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
270 if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 ) {
277 ber_sockbuf_free( lc->lconn_sb );
279 LDAP_FREE( (char *)lc );
280 ld->ld_errno = LDAP_SERVER_DOWN;
284 lc->lconn_server = ldap_url_dup(srv);
287 lc->lconn_status = LDAP_CONNST_CONNECTED;
288 lc->lconn_next = ld->ld_conns;
292 * XXX for now, we always do a synchronous bind. This will have
293 * to change in the long run...
297 LDAPConn *savedefconn;
299 /* Set flag to prevent additional referrals from being processed on this
300 * connection until the bind has completed
302 lc->lconn_rebind_inprogress = 1;
303 /* V3 rebind function */
304 if ( ld->ld_rebind_proc != NULL) {
305 LDAPURLDesc *srvfunc;
306 if( ( srvfunc = ldap_url_dup( srvlist)) == NULL) {
307 ld->ld_errno = LDAP_NO_MEMORY;
310 savedefconn = ld->ld_defconn;
311 ++lc->lconn_refcnt; /* avoid premature free */
314 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
315 err = (*ld->ld_rebind_proc)( ld,
316 bind->ri_url, bind->ri_request, bind->ri_msgid,
317 ld->ld_rebind_params );
319 ld->ld_defconn = savedefconn;
324 ldap_free_connection( ld, lc, 1, 0 );
327 ldap_free_urldesc( srvfunc);
330 savedefconn = ld->ld_defconn;
331 ++lc->lconn_refcnt; /* avoid premature free */
334 Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
335 if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
338 ld->ld_defconn = savedefconn;
342 ldap_free_connection( ld, lc, 1, 0 );
347 lc->lconn_rebind_inprogress = 0;
355 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
357 * return an existing connection (if any) to the server srv
358 * if "any" is non-zero, check for any server in the "srv" chain
364 for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
365 for ( ls = srv; ls != NULL; ls = ls->lud_next ) {
366 if ( lc->lconn_server->lud_host != NULL &&
367 *lc->lconn_server->lud_host != '\0' &&
368 ls->lud_host != NULL && *ls->lud_host != '\0' &&
369 strcasecmp( ls->lud_host, lc->lconn_server->lud_host ) == 0
370 && ls->lud_port == lc->lconn_server->lud_port ) {
385 use_connection( LDAP *ld, LDAPConn *lc )
388 lc->lconn_lastused = time( NULL );
393 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
395 LDAPConn *tmplc, *prevlc;
397 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection\n", 0, 0, 0 );
399 if ( force || --lc->lconn_refcnt <= 0 ) {
400 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
401 ldap_mark_select_clear( ld, lc->lconn_sb );
403 ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
407 if( lc->lconn_ber != NULL ) {
408 ber_free( lc->lconn_ber, 1 );
411 ldap_int_sasl_close( ld, lc );
414 for ( tmplc = ld->ld_conns; tmplc != NULL;
415 tmplc = tmplc->lconn_next ) {
417 if ( prevlc == NULL ) {
418 ld->ld_conns = tmplc->lconn_next;
420 prevlc->lconn_next = tmplc->lconn_next;
426 ldap_free_urllist( lc->lconn_server );
427 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
428 if ( lc->lconn_krbinstance != NULL ) {
429 LDAP_FREE( lc->lconn_krbinstance );
432 if ( lc->lconn_sb != ld->ld_sb ) {
433 ber_sockbuf_free( lc->lconn_sb );
435 if( lc->lconn_rebind_queue != NULL) {
437 for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++) {
438 LDAP_VFREE(lc->lconn_rebind_queue[i]);
440 LDAP_FREE( lc->lconn_rebind_queue);
443 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
446 lc->lconn_lastused = time( NULL );
447 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
448 lc->lconn_refcnt, 0, 0 );
455 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
460 fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
461 for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
462 if ( lc->lconn_server != NULL ) {
463 fprintf( stderr, "* host: %s port: %d%s\n",
464 ( lc->lconn_server->lud_host == NULL ) ? "(null)"
465 : lc->lconn_server->lud_host,
466 lc->lconn_server->lud_port, ( lc->lconn_sb ==
467 ld->ld_sb ) ? " (default)" : "" );
469 fprintf( stderr, " refcnt: %d status: %s\n", lc->lconn_refcnt,
470 ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
471 "NeedSocket" : ( lc->lconn_status ==
472 LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
473 fprintf( stderr, " last used: %s",
474 ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
475 if( lc->lconn_rebind_inprogress ) {
476 fprintf( stderr, " rebind in progress\n");
477 if( lc->lconn_rebind_queue != NULL) {
479 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
481 for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
482 fprintf( stderr, " queue %d entry %d - %s\n",
483 i, j, lc->lconn_rebind_queue[i][j]);
487 fprintf( stderr, " queue is empty\n");
490 fprintf(stderr, "\n");
499 ldap_dump_requests_and_responses( LDAP *ld )
504 fprintf( stderr, "** Outstanding Requests:\n" );
505 if (( lr = ld->ld_requests ) == NULL ) {
506 fprintf( stderr, " Empty\n" );
508 for ( ; lr != NULL; lr = lr->lr_next ) {
509 fprintf( stderr, " * msgid %d, origid %d, status %s\n",
510 lr->lr_msgid, lr->lr_origid,
511 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
512 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
513 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
514 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
515 ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
516 fprintf( stderr, " outstanding referrals %d, parent count %d\n",
517 lr->lr_outrefcnt, lr->lr_parentcnt );
520 fprintf( stderr, "** Response Queue:\n" );
521 if (( lm = ld->ld_responses ) == NULL ) {
522 fprintf( stderr, " Empty\n" );
524 for ( ; lm != NULL; lm = lm->lm_next ) {
525 fprintf( stderr, " * msgid %d, type %lu\n",
526 lm->lm_msgid, (unsigned long) lm->lm_msgtype );
527 if (( l = lm->lm_chain ) != NULL ) {
528 fprintf( stderr, " chained responses:\n" );
529 for ( ; l != NULL; l = l->lm_chain ) {
531 " * msgid %d, type %lu\n",
533 (unsigned long) l->lm_msgtype );
538 #endif /* LDAP_DEBUG */
541 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
543 if ( lr->lr_prev == NULL ) {
544 ld->ld_requests = lr->lr_next;
546 lr->lr_prev->lr_next = lr->lr_next;
549 if ( lr->lr_next != NULL ) {
550 lr->lr_next->lr_prev = lr->lr_prev;
553 if ( lr->lr_ber != NULL ) {
554 ber_free( lr->lr_ber, 1 );
557 if ( lr->lr_res_error != NULL ) {
558 LDAP_FREE( lr->lr_res_error );
561 if ( lr->lr_res_matched != NULL ) {
562 LDAP_FREE( lr->lr_res_matched );
569 ldap_free_request( LDAP *ld, LDAPRequest *lr )
571 LDAPRequest *tmplr, *nextlr;
572 LDAPRequest **ttmplr;
574 Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
575 lr->lr_origid, lr->lr_msgid, 0 );
577 if ( lr->lr_parent != NULL ) {
578 --lr->lr_parent->lr_outrefcnt;
579 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
581 *ttmplr = lr->lr_refnext;
583 /* free all referrals (child requests) */
584 while ( lr->lr_child )
585 ldap_free_request( ld, lr->lr_child );
587 ldap_free_request_int( ld, lr );
595 * (IN) ld = LDAP connection handle
596 * (IN) lr = LDAP Request structure
597 * (IN) refs = array of pointers to referral strings that we will chase
598 * The array will be free'd by this function when no longer needed
599 * (IN) sref != 0 if following search reference
600 * (OUT) errstrp = Place to return a string of referrals which could not be followed
601 * (OUT) hadrefp = 1 if sucessfully followed referral
603 * Return value - number of referrals followed
606 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
609 int unfollowedcnt = 0;
610 LDAPRequest *origreq;
611 LDAPURLDesc *srv = NULL;
613 char **refarray = NULL;
618 ld->ld_errno = LDAP_SUCCESS; /* optimistic */
621 Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
626 /* If no referrals in array, return */
627 if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
632 /* Check for hop limit exceeded */
633 if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
634 Debug( LDAP_DEBUG_ANY,
635 "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
636 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
641 /* find original request */
643 origreq->lr_parent != NULL;
644 origreq = origreq->lr_parent )
651 /* parse out & follow referrals */
652 for( i=0; refarray[i] != NULL; i++) {
653 /* Parse the referral URL */
654 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
660 if( srv->lud_crit_exts ) {
661 /* we do not support any extensions */
662 ld->ld_errno = LDAP_NOT_SUPPORTED;
667 /* treat ldap://hostpart and ldap://hostpart/ the same */
668 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
669 LDAP_FREE( srv->lud_dn );
673 /* check connection for re-bind in progress */
674 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
675 if( lc->lconn_rebind_inprogress) {
676 /* We are already chasing a referral or search reference and a
677 * bind on that connection is in progress. We must queue
678 * referrals on that connection, so we don't get a request
679 * going out before the bind operation completes. This happens
680 * if two search references come in one behind the other
681 * for the same server with different contexts.
683 Debug( LDAP_DEBUG_TRACE,
684 "ldap_chase_v3referrals: queue referral \"%s\"\n",
686 if( lc->lconn_rebind_queue == NULL ) {
687 /* Create a referral list */
688 lc->lconn_rebind_queue =
689 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
691 if( lc->lconn_rebind_queue == NULL) {
692 ld->ld_errno = LDAP_NO_MEMORY;
697 lc->lconn_rebind_queue[0] = refarray;
698 lc->lconn_rebind_queue[1] = NULL;
702 /* Count how many referral arrays we already have */
703 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
707 /* Add the new referral to the list */
708 lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
709 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
711 if( lc->lconn_rebind_queue == NULL ) {
712 ld->ld_errno = LDAP_NO_MEMORY;
716 lc->lconn_rebind_queue[j] = refarray;
717 lc->lconn_rebind_queue[j+1] = NULL;
721 /* We have queued the referral/reference, now just return */
724 count = 1; /* Pretend we already followed referral */
728 /* Re-encode the request with the new starting point of the search.
729 * Note: In the future we also need to replace the filter if one
730 * was provided with the search reference
733 /* For references we don't want old dn if new dn empty */
734 if ( sref && srv->lud_dn == NULL ) {
735 srv->lud_dn = LDAP_STRDUP( "" );
738 ber = re_encode_request( ld, origreq->lr_ber, ++ld->ld_msgid,
739 sref, srv, &rinfo.ri_request );
742 ld->ld_errno = LDAP_ENCODING_ERROR;
747 Debug( LDAP_DEBUG_TRACE,
748 "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
749 lr->lr_msgid, refarray[i], 0);
751 /* Send the new request to the server - may require a bind */
752 rinfo.ri_msgid = origreq->lr_origid;
753 rinfo.ri_url = refarray[i];
754 if ( (rc = ldap_send_server_request( ld, ber, ld->ld_msgid,
755 origreq, srv, NULL, &rinfo )) < 0 ) {
756 /* Failure, try next referral in the list */
757 Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
758 refarray[i], ldap_err2string( ld->ld_errno ), 0);
759 unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
760 ldap_free_urllist(srv);
763 /* Success, no need to try this referral list further */
768 /* check if there is a queue of referrals that came in during bind */
770 if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
771 ld->ld_errno = LDAP_OPERATIONS_ERROR;
777 if( lc->lconn_rebind_queue != NULL) {
778 /* Release resources of previous list */
779 LDAP_VFREE(refarray);
781 ldap_free_urllist(srv);
784 /* Pull entries off end of queue so list always null terminated */
785 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
788 refarray = lc->lconn_rebind_queue[j-1];
789 lc->lconn_rebind_queue[j-1] = NULL;
790 /* we pulled off last entry from queue, free queue */
792 LDAP_FREE( lc->lconn_rebind_queue);
793 lc->lconn_rebind_queue = NULL;
795 /* restart the loop the with new referral list */
799 break; /* referral followed, break out of for loop */
803 LDAP_VFREE(refarray);
804 ldap_free_urllist(srv);
805 LDAP_FREE( *errstrp );
809 LDAP_FREE( unfollowed );
812 ld->ld_errno = LDAP_REFERRAL;
813 *errstrp = unfollowed;
819 * XXX merging of errors in this routine needs to be improved
822 ldap_chase_referrals( LDAP *ld,
829 char *p, *ref, *unfollowed;
830 LDAPRequest *origreq;
835 Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
837 ld->ld_errno = LDAP_SUCCESS; /* optimistic */
840 if ( *errstrp == NULL ) {
844 len = strlen( *errstrp );
845 for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
846 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
848 p += LDAP_REF_STR_LEN;
853 if ( len < LDAP_REF_STR_LEN ) {
857 if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
858 Debug( LDAP_DEBUG_ANY,
859 "more than %d referral hops (dropping)\n",
860 ld->ld_refhoplimit, 0, 0 );
861 /* XXX report as error in ld->ld_errno? */
865 /* find original request */
866 for ( origreq = lr; origreq->lr_parent != NULL;
867 origreq = origreq->lr_parent ) {
874 /* parse out & follow referrals */
875 for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
876 if (( p = strchr( ref, '\n' )) != NULL ) {
882 rc = ldap_url_parse_ext( ref, &srv );
884 if ( rc != LDAP_URL_SUCCESS ) {
885 Debug( LDAP_DEBUG_TRACE,
886 "ignoring unknown referral <%s>\n", ref, 0, 0 );
887 rc = ldap_append_referral( ld, &unfollowed, ref );
892 if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
893 LDAP_FREE( srv->lud_dn );
897 Debug( LDAP_DEBUG_TRACE,
898 "chasing LDAP referral: <%s>\n", ref, 0, 0 );
902 ber = re_encode_request( ld, origreq->lr_ber,
903 ++ld->ld_msgid, sref, srv, &rinfo.ri_request );
909 /* copy the complete referral for rebind process */
910 rinfo.ri_url = LDAP_STRDUP( ref );
912 rinfo.ri_msgid = origreq->lr_origid;
914 rc = ldap_send_server_request( ld, ber, ld->ld_msgid,
915 lr, srv, NULL, &rinfo );
917 LDAP_FREE( rinfo.ri_url );
922 Debug( LDAP_DEBUG_ANY,
923 "Unable to chase referral (%s)\n",
924 ldap_err2string( ld->ld_errno ), 0, 0 );
925 rc = ldap_append_referral( ld, &unfollowed, ref );
928 ldap_free_urllist(srv);
931 LDAP_FREE( *errstrp );
932 *errstrp = unfollowed;
934 return(( rc == 0 ) ? count : rc );
939 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
943 if ( *referralsp == NULL ) {
945 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
949 *referralsp = (char *)LDAP_REALLOC( *referralsp,
950 strlen( *referralsp ) + strlen( s ) + 2 );
953 if ( *referralsp == NULL ) {
954 ld->ld_errno = LDAP_NO_MEMORY;
959 strcpy( *referralsp, LDAP_REF_STR );
961 strcat( *referralsp, "\n" );
963 strcat( *referralsp, s );
971 re_encode_request( LDAP *ld,
979 * XXX this routine knows way too much about how the lber library works!
986 BerElement tmpber, *ber;
990 Debug( LDAP_DEBUG_TRACE,
991 "re_encode_request: new msgid %ld, new dn <%s>\n",
993 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
998 * all LDAP requests are sequences that start with a message id.
999 * For all except delete, this is followed by a sequence that is
1000 * tagged with the operation code. For delete, the provided DN
1001 * is not wrapped by a sequence.
1003 rc = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1005 if ( rc == LBER_ERROR ) {
1006 ld->ld_errno = LDAP_DECODING_ERROR;
1011 if ( tag == LDAP_REQ_BIND ) {
1012 /* bind requests have a version number before the DN & other stuff */
1013 rc = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
1015 } else if ( tag == LDAP_REQ_DELETE ) {
1016 /* delete requests don't have a DN wrapping sequence */
1017 rc = ber_scanf( &tmpber, "a", &orig_dn );
1019 } else if ( tag == LDAP_REQ_SEARCH ) {
1020 /* search requests need to be re-scope-ed */
1021 rc = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
1023 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1024 /* use the scope provided in reference */
1025 scope = srv->lud_scope;
1027 } else if ( sref && scope != LDAP_SCOPE_SUBTREE ) {
1028 /* use scope implied by previous operation */
1031 /* subtree -> subtree */
1032 scope = LDAP_SCOPE_BASE;
1036 rc = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
1039 if( rc == LBER_ERROR ) {
1040 ld->ld_errno = LDAP_DECODING_ERROR;
1044 if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1048 if ( srv->lud_dn == NULL ) {
1054 if ( tag == LDAP_REQ_BIND ) {
1055 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1056 } else if ( tag == LDAP_REQ_DELETE ) {
1057 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1058 } else if ( tag == LDAP_REQ_SEARCH ) {
1059 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1061 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1064 LDAP_FREE( orig_dn );
1067 ld->ld_errno = LDAP_ENCODING_ERROR;
1072 if ( tag != LDAP_REQ_DELETE && (
1073 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1074 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1075 ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1077 ld->ld_errno = LDAP_ENCODING_ERROR;
1083 if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1084 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1086 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1088 #endif /* LDAP_DEBUG */
1090 *type = tag; /* return request type */
1096 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1100 for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1101 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1102 continue; /* Skip completed requests */
1104 if ( msgid == lr->lr_msgid ) {