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- /* $OpenLDAP: pkg/ldap/libraries/libldap/request.c,v 1.30.2.14 2001/07/21 19:01:40 kurt Exp $ */
- /*
- * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
- */
- /* Portions
- * Copyright (c) 1995 Regents of the University of Michigan.
- * All rights reserved.
- */
- /*---
- * This notice applies to changes, created by or for Novell, Inc.,
- * to preexisting works for which notices appear elsewhere in this file.
- *
- * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
- *
- * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
- * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
- * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
- * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
- * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
- * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
- * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
- * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
- *---
- * Modification to OpenLDAP source by Novell, Inc.
- * April 2000 sfs Added code to chase V3 referrals
- * request.c - sending of ldap requests; handling of referrals
- */
-
- #include "portable.h"
-
- #include <stdio.h>
-
- #include <ac/stdlib.h>
-
- #include <ac/errno.h>
- #include <ac/socket.h>
- #include <ac/string.h>
- #include <ac/time.h>
- #include <ac/unistd.h>
-
- #include "ldap-int.h"
- #include "lber.h"
-
- static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
- static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
-
- static BerElement *
- re_encode_request( LDAP *ld,
- BerElement *origber,
- ber_int_t msgid,
- int sref,
- LDAPURLDesc *srv,
- int *type );
-
- BerElement *
- ldap_alloc_ber_with_options( LDAP *ld )
- {
- BerElement *ber;
-
- if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
- ld->ld_errno = LDAP_NO_MEMORY;
- }
-
- return( ber );
- }
-
-
- void
- ldap_set_ber_options( LDAP *ld, BerElement *ber )
- {
- ber->ber_options = ld->ld_lberoptions;
- }
-
-
- ber_int_t
- ldap_send_initial_request(
- LDAP *ld,
- ber_tag_t msgtype,
- const char *dn,
- BerElement *ber )
- {
- LDAPURLDesc *servers;
- int rc;
-
- Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
-
- if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
- /* not connected yet */
- int rc = ldap_open_defconn( ld );
-
- if( rc < 0 ) {
- ber_free( ber, 1 );
- return( -1 );
- }
-
- Debug( LDAP_DEBUG_TRACE,
- "ldap_open_defconn: successful\n",
- 0, 0, 0 );
- }
-
- {
- /*
- * use of DNS is turned off or this is an X.500 DN...
- * use our default connection
- */
- servers = NULL;
- }
-
- rc = ldap_send_server_request( ld, ber, ld->ld_msgid, NULL,
- servers, NULL, NULL );
- if (servers)
- ldap_free_urllist(servers);
- return(rc);
- }
-
-
-
- int
- ldap_send_server_request(
- LDAP *ld,
- BerElement *ber,
- ber_int_t msgid,
- LDAPRequest *parentreq,
- LDAPURLDesc *srvlist,
- LDAPConn *lc,
- LDAPreqinfo *bind )
- {
- LDAPRequest *lr;
- int incparent;
-
- Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
-
- incparent = 0;
- ld->ld_errno = LDAP_SUCCESS; /* optimistic */
-
- if ( lc == NULL ) {
- if ( srvlist == NULL ) {
- lc = ld->ld_defconn;
- } else {
- if (( lc = find_connection( ld, srvlist, 1 )) ==
- NULL ) {
- if ( (bind != NULL) && (parentreq != NULL) ) {
- /* Remember the bind in the parent */
- incparent = 1;
- ++parentreq->lr_outrefcnt;
- }
- lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
- }
- }
- }
-
- if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
- ber_free( ber, 1 );
- if ( ld->ld_errno == LDAP_SUCCESS ) {
- ld->ld_errno = LDAP_SERVER_DOWN;
- }
- if ( incparent ) {
- /* Forget about the bind */
- --parentreq->lr_outrefcnt;
- }
- return( -1 );
- }
-
- use_connection( ld, lc );
- if (( lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ))) ==
- NULL ) {
- ld->ld_errno = LDAP_NO_MEMORY;
- ldap_free_connection( ld, lc, 0, 0 );
- ber_free( ber, 1 );
- if ( incparent ) {
- /* Forget about the bind */
- --parentreq->lr_outrefcnt;
- }
- return( -1 );
- }
- lr->lr_msgid = msgid;
- lr->lr_status = LDAP_REQST_INPROGRESS;
- lr->lr_res_errno = LDAP_SUCCESS; /* optimistic */
- lr->lr_ber = ber;
- lr->lr_conn = lc;
- if ( parentreq != NULL ) { /* sub-request */
- if ( !incparent ) {
- /* Increment if we didn't do it before the bind */
- ++parentreq->lr_outrefcnt;
- }
- lr->lr_origid = parentreq->lr_origid;
- lr->lr_parentcnt = parentreq->lr_parentcnt + 1;
- lr->lr_parent = parentreq;
- lr->lr_refnext = parentreq->lr_refnext;
- parentreq->lr_refnext = lr;
- } else { /* original request */
- lr->lr_origid = lr->lr_msgid;
- }
-
- if (( lr->lr_next = ld->ld_requests ) != NULL ) {
- lr->lr_next->lr_prev = lr;
- }
- ld->ld_requests = lr;
- lr->lr_prev = NULL;
-
- if ( ber_flush( lc->lconn_sb, ber, 0 ) != 0 ) {
- #ifdef notyet
- if ( errno == EWOULDBLOCK ) {
- /* need to continue write later */
- lr->lr_status = LDAP_REQST_WRITING;
- ldap_mark_select_write( ld, lc->lconn_sb );
- } else {
- #else /* notyet */
- ld->ld_errno = LDAP_SERVER_DOWN;
- ldap_free_request( ld, lr );
- ldap_free_connection( ld, lc, 0, 0 );
- return( -1 );
- #endif /* notyet */
- #ifdef notyet
- }
- #endif /* notyet */
- } else {
- if ( parentreq == NULL ) {
- ber->ber_end = ber->ber_ptr;
- ber->ber_ptr = ber->ber_buf;
- }
-
- /* sent -- waiting for a response */
- ldap_mark_select_read( ld, lc->lconn_sb );
- }
-
- ld->ld_errno = LDAP_SUCCESS;
- return( msgid );
- }
-
- LDAPConn *
- ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
- int connect, LDAPreqinfo *bind )
- {
- LDAPConn *lc;
- LDAPURLDesc *srv;
- Sockbuf *sb = NULL;
-
- Debug( LDAP_DEBUG_TRACE, "ldap_new_connection\n", 0, 0, 0 );
- /*
- * make a new LDAP server connection
- * XXX open connection synchronously for now
- */
- if (( lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ))) == NULL ||
- ( !use_ldsb && ( (sb = ber_sockbuf_alloc()) == NULL ))) {
- if ( lc != NULL ) {
- LDAP_FREE( (char *)lc );
- }
- ld->ld_errno = LDAP_NO_MEMORY;
- return( NULL );
- }
-
- lc->lconn_sb = ( use_ldsb ) ? ld->ld_sb : sb;
-
- if ( connect ) {
- for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
- if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 ) {
- break;
- }
- }
-
- if ( srv == NULL ) {
- if ( !use_ldsb ) {
- ber_sockbuf_free( lc->lconn_sb );
- }
- LDAP_FREE( (char *)lc );
- ld->ld_errno = LDAP_SERVER_DOWN;
- return( NULL );
- }
-
- lc->lconn_server = ldap_url_dup(srv);
- }
-
- lc->lconn_status = LDAP_CONNST_CONNECTED;
- lc->lconn_next = ld->ld_conns;
- ld->ld_conns = lc;
-
- /*
- * XXX for now, we always do a synchronous bind. This will have
- * to change in the long run...
- */
- if ( bind != NULL) {
- int err = 0;
- LDAPConn *savedefconn;
-
- /* Set flag to prevent additional referrals from being processed on this
- * connection until the bind has completed
- */
- lc->lconn_rebind_inprogress = 1;
- /* V3 rebind function */
- if ( ld->ld_rebindproc != NULL) {
- LDAPURLDesc *srvfunc;
- if( ( srvfunc = ldap_url_dup( srvlist)) == NULL) {
- ld->ld_errno = LDAP_NO_MEMORY;
- err = -1;
- } else {
- savedefconn = ld->ld_defconn;
- ++lc->lconn_refcnt; /* avoid premature free */
- ld->ld_defconn = lc;
-
- Debug( LDAP_DEBUG_TRACE, "Call application rebindproc\n", 0, 0, 0);
- err = (*ld->ld_rebindproc)( ld, bind->ri_url, bind->ri_request, bind->ri_msgid);
-
- ld->ld_defconn = savedefconn;
- --lc->lconn_refcnt;
-
- if( err != 0) {
- err = -1;
- ldap_free_connection( ld, lc, 1, 0 );
- lc = NULL;
- }
- ldap_free_urldesc( srvfunc);
- }
- } else {
- savedefconn = ld->ld_defconn;
- ++lc->lconn_refcnt; /* avoid premature free */
- ld->ld_defconn = lc;
-
- Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
- if ( ldap_bind_s( ld, "", "", LDAP_AUTH_SIMPLE ) != LDAP_SUCCESS ) {
- err = -1;
- }
- ld->ld_defconn = savedefconn;
- --lc->lconn_refcnt;
-
- if ( err != 0 ) {
- ldap_free_connection( ld, lc, 1, 0 );
- lc = NULL;
- }
- }
- if( lc != NULL)
- lc->lconn_rebind_inprogress = 0;
- }
-
- return( lc );
- }
-
-
- static LDAPConn *
- find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
- /*
- * return an existing connection (if any) to the server srv
- * if "any" is non-zero, check for any server in the "srv" chain
- */
- {
- LDAPConn *lc;
- LDAPURLDesc *ls;
-
- for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
- for ( ls = srv; ls != NULL; ls = ls->lud_next ) {
- if ( lc->lconn_server->lud_host != NULL &&
- *lc->lconn_server->lud_host != '\0' &&
- ls->lud_host != NULL && *ls->lud_host != '\0' &&
- strcasecmp( ls->lud_host, lc->lconn_server->lud_host ) == 0
- && ls->lud_port == lc->lconn_server->lud_port ) {
- return lc;
- }
- if ( !any ) {
- break;
- }
- }
- }
-
- return NULL;
- }
-
-
-
- static void
- use_connection( LDAP *ld, LDAPConn *lc )
- {
- ++lc->lconn_refcnt;
- lc->lconn_lastused = time( NULL );
- }
-
-
- void
- ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
- {
- LDAPConn *tmplc, *prevlc;
-
- Debug( LDAP_DEBUG_TRACE, "ldap_free_connection\n", 0, 0, 0 );
-
- if ( force || --lc->lconn_refcnt <= 0 ) {
- if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
- ldap_mark_select_clear( ld, lc->lconn_sb );
- if ( unbind ) {
- ldap_send_unbind( ld, lc->lconn_sb, NULL, NULL );
- }
- }
-
- if( lc->lconn_ber != NULL ) {
- ber_free( lc->lconn_ber, 1 );
- }
-
- ldap_int_sasl_close( ld, lc );
-
- prevlc = NULL;
- for ( tmplc = ld->ld_conns; tmplc != NULL;
- tmplc = tmplc->lconn_next ) {
- if ( tmplc == lc ) {
- if ( prevlc == NULL ) {
- ld->ld_conns = tmplc->lconn_next;
- } else {
- prevlc->lconn_next = tmplc->lconn_next;
- }
- break;
- }
- prevlc = tmplc;
- }
- ldap_free_urllist( lc->lconn_server );
- #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
- if ( lc->lconn_krbinstance != NULL ) {
- LDAP_FREE( lc->lconn_krbinstance );
- }
- #endif
- if ( lc->lconn_sb != ld->ld_sb ) {
- ber_sockbuf_free( lc->lconn_sb );
- }
- if( lc->lconn_rebind_queue != NULL) {
- int i;
- for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++) {
- LDAP_VFREE(lc->lconn_rebind_queue[i]);
- }
- LDAP_FREE( lc->lconn_rebind_queue);
- }
- LDAP_FREE( lc );
- Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
- 0, 0, 0 );
- } else {
- lc->lconn_lastused = time( NULL );
- Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
- lc->lconn_refcnt, 0, 0 );
- }
- }
-
-
- #ifdef LDAP_DEBUG
- void
- ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
- {
- LDAPConn *lc;
- char timebuf[32];
-
- fprintf( stderr, "** Connection%s:\n", all ? "s" : "" );
- for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
- if ( lc->lconn_server != NULL ) {
- fprintf( stderr, "* host: %s port: %d%s\n",
- ( lc->lconn_server->lud_host == NULL ) ? "(null)"
- : lc->lconn_server->lud_host,
- lc->lconn_server->lud_port, ( lc->lconn_sb ==
- ld->ld_sb ) ? " (default)" : "" );
- }
- fprintf( stderr, " refcnt: %d status: %s\n", lc->lconn_refcnt,
- ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
- "NeedSocket" : ( lc->lconn_status ==
- LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
- fprintf( stderr, " last used: %s",
- ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
- if( lc->lconn_rebind_inprogress ) {
- fprintf( stderr, " rebind in progress\n");
- if( lc->lconn_rebind_queue != NULL) {
- int i = 0;
- for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
- int j = 0;
- for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
- fprintf( stderr, " queue %d entry %d - %s\n",
- i, j, lc->lconn_rebind_queue[i][j]);
- }
- }
- } else {
- fprintf( stderr, " queue is empty\n");
- }
- }
- fprintf(stderr, "\n");
- if ( !all ) {
- break;
- }
- }
- }
-
-
- void
- ldap_dump_requests_and_responses( LDAP *ld )
- {
- LDAPRequest *lr;
- LDAPMessage *lm, *l;
-
- fprintf( stderr, "** Outstanding Requests:\n" );
- if (( lr = ld->ld_requests ) == NULL ) {
- fprintf( stderr, " Empty\n" );
- }
- for ( ; lr != NULL; lr = lr->lr_next ) {
- fprintf( stderr, " * msgid %d, origid %d, status %s\n",
- lr->lr_msgid, lr->lr_origid,
- ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
- ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
- ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
- ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
- ( lr->lr_status == LDAP_REQST_COMPLETED ? "Request Completed" : "Invalid Status"));
- fprintf( stderr, " outstanding referrals %d, parent count %d\n",
- lr->lr_outrefcnt, lr->lr_parentcnt );
- }
-
- fprintf( stderr, "** Response Queue:\n" );
- if (( lm = ld->ld_responses ) == NULL ) {
- fprintf( stderr, " Empty\n" );
- }
- for ( ; lm != NULL; lm = lm->lm_next ) {
- fprintf( stderr, " * msgid %d, type %lu\n",
- lm->lm_msgid, (unsigned long) lm->lm_msgtype );
- if (( l = lm->lm_chain ) != NULL ) {
- fprintf( stderr, " chained responses:\n" );
- for ( ; l != NULL; l = l->lm_chain ) {
- fprintf( stderr,
- " * msgid %d, type %lu\n",
- l->lm_msgid,
- (unsigned long) l->lm_msgtype );
- }
- }
- }
- }
- #endif /* LDAP_DEBUG */
-
-
- void
- ldap_free_request( LDAP *ld, LDAPRequest *lr )
- {
- LDAPRequest *tmplr, *nextlr;
-
- Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
- lr->lr_origid, lr->lr_msgid, 0 );
-
- if ( lr->lr_parent != NULL ) {
- --lr->lr_parent->lr_outrefcnt;
- } else {
- /* free all referrals (child requests) */
- for ( tmplr = lr->lr_refnext; tmplr != NULL; tmplr = nextlr ) {
- nextlr = tmplr->lr_refnext;
- ldap_free_request( ld, tmplr );
- }
- }
-
- if ( lr->lr_prev == NULL ) {
- ld->ld_requests = lr->lr_next;
- } else {
- lr->lr_prev->lr_next = lr->lr_next;
- }
-
- if ( lr->lr_next != NULL ) {
- lr->lr_next->lr_prev = lr->lr_prev;
- }
-
- if ( lr->lr_ber != NULL ) {
- ber_free( lr->lr_ber, 1 );
- }
-
- if ( lr->lr_res_error != NULL ) {
- LDAP_FREE( lr->lr_res_error );
- }
-
- if ( lr->lr_res_matched != NULL ) {
- LDAP_FREE( lr->lr_res_matched );
- }
-
- LDAP_FREE( lr );
- }
-
- /*
- * Chase v3 referrals
- *
- * Parameters:
- * (IN) ld = LDAP connection handle
- * (IN) lr = LDAP Request structure
- * (IN) refs = array of pointers to referral strings that we will chase
- * The array will be free'd by this function when no longer needed
- * (IN) sref != 0 if following search reference
- * (OUT) errstrp = Place to return a string of referrals which could not be followed
- * (OUT) hadrefp = 1 if sucessfully followed referral
- *
- * Return value - number of referrals followed
- */
- int
- ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
- {
- char *unfollowed;
- int unfollowedcnt = 0;
- LDAPRequest *origreq;
- LDAPURLDesc *srv = NULL;
- BerElement *ber;
- char **refarray = NULL;
- LDAPConn *lc;
- int rc, count, i, j;
- LDAPreqinfo rinfo;
-
- ld->ld_errno = LDAP_SUCCESS; /* optimistic */
- *hadrefp = 0;
-
- Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
-
- unfollowed = NULL;
- rc = count = 0;
-
- /* If no referrals in array, return */
- if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
- rc = 0;
- goto done;
- }
-
- /* Check for hop limit exceeded */
- if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
- Debug( LDAP_DEBUG_ANY,
- "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
- ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
- rc = -1;
- goto done;
- }
-
- /* find original request */
- for ( origreq = lr; origreq->lr_parent != NULL; origreq = origreq->lr_parent ) {
- ;
- }
-
- refarray = refs;
- refs = NULL;
- /* parse out & follow referrals */
- for( i=0; refarray[i] != NULL; i++) {
- /* Parse the referral URL */
- if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
- ld->ld_errno = rc;
- rc = -1;
- goto done;
- }
-
- if( srv->lud_crit_exts ) {
- /* we do not support any extensions */
- ld->ld_errno = LDAP_NOT_SUPPORTED;
- rc = -1;
- goto done;
- }
-
- /* treat ldap://hostpart and ldap://hostpart/ the same */
- if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
- LDAP_FREE( srv->lud_dn );
- srv->lud_dn = NULL;
- }
-
- /* check connection for re-bind in progress */
- if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
- if( lc->lconn_rebind_inprogress) {
- /* We are already chasing a referral or search reference and a
- * bind on that connection is in progress. We must queue
- * referrals on that connection, so we don't get a request
- * going out before the bind operation completes. This happens
- * if two search references come in one behind the other
- * for the same server with different contexts.
- */
- Debug( LDAP_DEBUG_TRACE,
- "ldap_chase_v3referrals: queue referral \"%s\"\n",
- refarray[i], 0, 0);
- if( lc->lconn_rebind_queue == NULL ) {
- /* Create a referral list */
- if( (lc->lconn_rebind_queue = (char ***)LDAP_MALLOC( sizeof(void *) * 2)) == NULL) {
- ld->ld_errno = LDAP_NO_MEMORY;
- rc = -1;
- goto done;
- }
- lc->lconn_rebind_queue[0] = refarray;
- lc->lconn_rebind_queue[1] = NULL;
- refarray = NULL;
- } else {
- /* Count how many referral arrays we already have */
- for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
- ;
- }
- /* Add the new referral to the list */
- if( (lc->lconn_rebind_queue = (char ***)LDAP_REALLOC(
- lc->lconn_rebind_queue, sizeof(void *) * (j + 2))) == NULL) {
- ld->ld_errno = LDAP_NO_MEMORY;
- rc = -1;
- goto done;
- }
- lc->lconn_rebind_queue[j] = refarray;
- lc->lconn_rebind_queue[j+1] = NULL;
- refarray = NULL;
- }
- /* We have queued the referral/reference, now just return */
- rc = 0;
- *hadrefp = 1;
- count = 1; /* Pretend we already followed referral */
- goto done;
- }
- }
- /* Re-encode the request with the new starting point of the search.
- * Note: In the future we also need to replace the filter if one
- * was provided with the search reference
- */
-
- /* For references we don't want old dn if new dn empty */
- if ( sref && srv->lud_dn == NULL ) {
- srv->lud_dn = LDAP_STRDUP( "" );
- }
-
- ber = re_encode_request( ld, origreq->lr_ber, ++ld->ld_msgid,
- sref, srv, &rinfo.ri_request );
-
- if( ber == NULL ) {
- ld->ld_errno = LDAP_ENCODING_ERROR;
- rc = -1;
- goto done;
- }
-
- Debug( LDAP_DEBUG_TRACE,
- "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
- lr->lr_msgid, refarray[i], 0);
-
- /* Send the new request to the server - may require a bind */
- rinfo.ri_msgid = origreq->lr_origid;
- rinfo.ri_url = refarray[i];
- if ( (rc = ldap_send_server_request( ld, ber, ld->ld_msgid,
- origreq, srv, NULL, &rinfo )) < 0 ) {
- /* Failure, try next referral in the list */
- Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%s)\n",
- refarray[i], ldap_err2string( ld->ld_errno ), 0);
- unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i]);
- ldap_free_urllist(srv);
- srv = NULL;
- } else {
- /* Success, no need to try this referral list further */
- rc = 0;
- ++count;
- *hadrefp = 1;
-
- /* check if there is a queue of referrals that came in during bind */
- if( lc == NULL) {
- if (( lc = find_connection( ld, srv, 1 )) == NULL ) {
- ld->ld_errno = LDAP_OPERATIONS_ERROR;
- rc = -1;
- goto done;
- }
- }
-
- if( lc->lconn_rebind_queue != NULL) {
- /* Release resources of previous list */
- LDAP_VFREE(refarray);
- refarray = NULL;
- ldap_free_urllist(srv);
- srv = NULL;
-
- /* Pull entries off end of queue so list always null terminated */
- for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
- ;
- }
- refarray = lc->lconn_rebind_queue[j-1];
- lc->lconn_rebind_queue[j-1] = NULL;
- /* we pulled off last entry from queue, free queue */
- if ( j == 1 ) {
- LDAP_FREE( lc->lconn_rebind_queue);
- lc->lconn_rebind_queue = NULL;
- }
- /* restart the loop the with new referral list */
- i = -1;
- continue;
- }
- break; /* referral followed, break out of for loop */
- }
- } /* end for loop */
- done:
- LDAP_VFREE(refarray);
- ldap_free_urllist(srv);
- LDAP_FREE( *errstrp );
-
- if( rc == 0) {
- *errstrp = NULL;
- LDAP_FREE( unfollowed );
- return count;
- } else {
- ld->ld_errno = LDAP_REFERRAL;
- *errstrp = unfollowed;
- return rc;
- }
- }
-
- /*
- * XXX merging of errors in this routine needs to be improved
- */
- int
- ldap_chase_referrals( LDAP *ld,
- LDAPRequest *lr,
- char **errstrp,
- int sref,
- int *hadrefp )
- {
- int rc, count, len;
- char *p, *ref, *unfollowed;
- LDAPRequest *origreq;
- LDAPURLDesc *srv;
- BerElement *ber;
- LDAPreqinfo rinfo;
-
- Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
-
- ld->ld_errno = LDAP_SUCCESS; /* optimistic */
- *hadrefp = 0;
-
- if ( *errstrp == NULL ) {
- return( 0 );
- }
-
- len = strlen( *errstrp );
- for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
- if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
- *p = '\0';
- p += LDAP_REF_STR_LEN;
- break;
- }
- }
-
- if ( len < LDAP_REF_STR_LEN ) {
- return( 0 );
- }
-
- if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
- Debug( LDAP_DEBUG_ANY,
- "more than %d referral hops (dropping)\n",
- ld->ld_refhoplimit, 0, 0 );
- /* XXX report as error in ld->ld_errno? */
- return( 0 );
- }
-
- /* find original request */
- for ( origreq = lr; origreq->lr_parent != NULL;
- origreq = origreq->lr_parent ) {
- /* empty */;
- }
-
- unfollowed = NULL;
- rc = count = 0;
-
- /* parse out & follow referrals */
- for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
- if (( p = strchr( ref, '\n' )) != NULL ) {
- *p++ = '\0';
- } else {
- p = NULL;
- }
-
- rc = ldap_url_parse_ext( ref, &srv );
-
- if ( rc != LDAP_URL_SUCCESS ) {
- Debug( LDAP_DEBUG_TRACE,
- "ignoring unknown referral <%s>\n", ref, 0, 0 );
- rc = ldap_append_referral( ld, &unfollowed, ref );
- *hadrefp = 1;
- continue;
- }
-
- if( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
- LDAP_FREE( srv->lud_dn );
- srv->lud_dn = NULL;
- }
-
- Debug( LDAP_DEBUG_TRACE,
- "chasing LDAP referral: <%s>\n", ref, 0, 0 );
-
- *hadrefp = 1;
-
- ber = re_encode_request( ld, origreq->lr_ber,
- ++ld->ld_msgid, sref, srv, &rinfo.ri_request );
-
- if( ber == NULL ) {
- return -1 ;
- }
-
- /* copy the complete referral for rebind process */
- rinfo.ri_url = LDAP_STRDUP( ref );
-
- rinfo.ri_msgid = origreq->lr_origid;
-
- rc = ldap_send_server_request( ld, ber, ld->ld_msgid,
- lr, srv, NULL, &rinfo );
-
- LDAP_FREE( rinfo.ri_url );
-
- if( rc >= 0 ) {
- ++count;
- } else {
- Debug( LDAP_DEBUG_ANY,
- "Unable to chase referral (%s)\n",
- ldap_err2string( ld->ld_errno ), 0, 0 );
- rc = ldap_append_referral( ld, &unfollowed, ref );
- }
-
- ldap_free_urllist(srv);
- }
-
- LDAP_FREE( *errstrp );
- *errstrp = unfollowed;
-
- return(( rc == 0 ) ? count : rc );
- }
-
-
- int
- ldap_append_referral( LDAP *ld, char **referralsp, char *s )
- {
- int first;
-
- if ( *referralsp == NULL ) {
- first = 1;
- *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
- + 1 );
- } else {
- first = 0;
- *referralsp = (char *)LDAP_REALLOC( *referralsp,
- strlen( *referralsp ) + strlen( s ) + 2 );
- }
-
- if ( *referralsp == NULL ) {
- ld->ld_errno = LDAP_NO_MEMORY;
- return( -1 );
- }
-
- if ( first ) {
- strcpy( *referralsp, LDAP_REF_STR );
- } else {
- strcat( *referralsp, "\n" );
- }
- strcat( *referralsp, s );
-
- return( 0 );
- }
-
-
-
- static BerElement *
- re_encode_request( LDAP *ld,
- BerElement *origber,
- ber_int_t msgid,
- int sref,
- LDAPURLDesc *srv,
- int *type )
- {
- /*
- * XXX this routine knows way too much about how the lber library works!
- */
- ber_int_t along;
- ber_tag_t tag;
- ber_int_t ver;
- ber_int_t scope;
- int rc;
- BerElement tmpber, *ber;
- char *orig_dn;
- char *dn;
-
- Debug( LDAP_DEBUG_TRACE,
- "re_encode_request: new msgid %ld, new dn <%s>\n",
- (long) msgid,
- ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
-
- tmpber = *origber;
-
- /*
- * all LDAP requests are sequences that start with a message id.
- * For all except delete, this is followed by a sequence that is
- * tagged with the operation code. For delete, the provided DN
- * is not wrapped by a sequence.
- */
- rc = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
-
- if ( rc == LBER_ERROR ) {
- ld->ld_errno = LDAP_DECODING_ERROR;
- return( NULL );
- }
-
- assert( tag != 0);
- if ( tag == LDAP_REQ_BIND ) {
- /* bind requests have a version number before the DN & other stuff */
- rc = ber_scanf( &tmpber, "{ia" /*}*/, &ver, &orig_dn );
-
- } else if ( tag == LDAP_REQ_DELETE ) {
- /* delete requests don't have a DN wrapping sequence */
- rc = ber_scanf( &tmpber, "a", &orig_dn );
-
- } else if ( tag == LDAP_REQ_SEARCH ) {
- /* search requests need to be re-scope-ed */
- rc = ber_scanf( &tmpber, "{ae" /*"}"*/, &orig_dn, &scope );
-
- if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
- /* use the scope provided in reference */
- scope = srv->lud_scope;
-
- } else if ( sref && scope != LDAP_SCOPE_SUBTREE ) {
- /* use scope implied by previous operation */
- /* base -> base */
- /* one -> base */
- /* subtree -> subtree */
- scope = LDAP_SCOPE_BASE;
- }
-
- } else {
- rc = ber_scanf( &tmpber, "{a" /*}*/, &orig_dn );
- }
-
- if( rc == LBER_ERROR ) {
- ld->ld_errno = LDAP_DECODING_ERROR;
- return NULL;
- }
-
- if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
- return NULL;
- }
-
- if ( srv->lud_dn == NULL ) {
- dn = orig_dn;
- } else {
- dn = srv->lud_dn;
- }
-
- if ( tag == LDAP_REQ_BIND ) {
- rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
- } else if ( tag == LDAP_REQ_DELETE ) {
- rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
- } else if ( tag == LDAP_REQ_SEARCH ) {
- rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
- } else {
- rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
- }
-
- LDAP_FREE( orig_dn );
-
- if ( rc == -1 ) {
- ld->ld_errno = LDAP_ENCODING_ERROR;
- ber_free( ber, 1 );
- return NULL;
- }
-
- if ( tag != LDAP_REQ_DELETE && (
- ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
- != ( tmpber.ber_end - tmpber.ber_ptr ) ||
- ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
- {
- ld->ld_errno = LDAP_ENCODING_ERROR;
- ber_free( ber, 1 );
- return NULL;
- }
-
- #ifdef LDAP_DEBUG
- if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
- Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
- 0, 0, 0 );
- ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
- }
- #endif /* LDAP_DEBUG */
-
- *type = tag; /* return request type */
- return ber;
- }
-
-
- LDAPRequest *
- ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
- {
- LDAPRequest *lr;
-
- for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
- if( lr->lr_status == LDAP_REQST_COMPLETED ) {
- continue; /* Skip completed requests */
- }
- if ( msgid == lr->lr_msgid ) {
- break;
- }
- }
-
- return( lr );
- }
-
-
-