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openldap/libraries/libldap/request.c
Bart Hartgers a81ca18845 Added support in liblber and libldap for partial reads, i.e. situations in 
which only part of a LDAPMessage is available on a socket.

The server-code seemed to handle this correctly already, so I didn't touch
it.

My apologies for the hack in ber_get_next :-).
1999-03-03 16:38:56 +00:00

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/*
* Copyright 1998-1999 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.
*
* request.c - sending of ldap requests; handling of referrals
*/
#include "portable.h"
#include <stdio.h>
#include <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"
#if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS ) || defined( LDAP_API_FEATURE_X_OPENLDAP_V2_DNS )
static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPServer *srv, int any ));
static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
static void free_servers LDAP_P(( LDAPServer *srvlist ));
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS || LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
static LDAPServer *dn2servers LDAP_P(( LDAP *ld, char *dn ));
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS
static BerElement *re_encode_request LDAP_P(( LDAP *ld, BerElement *origber,
int msgid, char **dnp ));
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS */
BerElement *
ldap_alloc_ber_with_options( LDAP *ld )
{
BerElement *ber;
if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULLBER ) {
ld->ld_errno = LDAP_NO_MEMORY;
#ifdef STR_TRANSLATION
} else {
ldap_set_ber_options( ld, ber );
#endif /* STR_TRANSLATION */
}
return( ber );
}
void
ldap_set_ber_options( LDAP *ld, BerElement *ber )
{
ber->ber_options = ld->ld_lberoptions;
#ifdef STR_TRANSLATION
if (( ld->ld_lberoptions & LBER_TRANSLATE_STRINGS ) != 0 ) {
ber_set_string_translators( ber,
ld->ld_lber_encode_translate_proc,
ld->ld_lber_decode_translate_proc );
}
#endif /* STR_TRANSLATION */
}
int
ldap_send_initial_request( LDAP *ld, unsigned long msgtype, char *dn,
BerElement *ber )
{
#if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS ) || defined( LDAP_API_FEATURE_X_OPENLDAP_V2_DNS )
LDAPServer *servers, *srv;
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS || LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
if ( ! lber_pvt_sb_in_use(&ld->ld_sb ) ) {
/* not connected yet */
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS
if (( srv = (LDAPServer *)calloc( 1, sizeof( LDAPServer ))) ==
NULL || ( ld->ld_defhost != NULL && ( srv->lsrv_host =
strdup( ld->ld_defhost )) == NULL ))
{
if (srv != NULL) free( srv );
ld->ld_errno = LDAP_NO_MEMORY;
return( -1 );
}
srv->lsrv_port = ld->ld_defport;
if (( ld->ld_defconn = ldap_new_connection( ld, &srv, 1,1,0 ))
== NULL )
{
if ( ld->ld_defhost != NULL ) free( srv->lsrv_host );
free( (char *)srv );
ld->ld_errno = LDAP_SERVER_DOWN;
return( -1 );
}
++ld->ld_defconn->lconn_refcnt; /* so it never gets closed/freed */
#else /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS */
if ( open_ldap_connection( ld, &ld->ld_sb, ld->ld_defhost,
ld->ld_defport, &ld->ld_host, 0 ) < 0 )
{
ldap_ld_free( ld, 0 );
ld->ld_errno = LDAP_SERVER_DOWN;
return( -1 );
}
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS */
Debug( LDAP_DEBUG_TRACE,
"ldap_delayed_open successful, ld_host is %s\n",
( ld->ld_host == NULL ) ? "(null)" : ld->ld_host, 0, 0 );
}
#if !defined( LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS ) && !defined( LDAP_API_FEATURE_X_OPENLDAP_V2_DNS )
if ( ber_flush( &ld->ld_sb, ber, 1 ) != 0 ) {
ld->ld_errno = LDAP_SERVER_DOWN;
return( -1 );
}
ld->ld_errno = LDAP_SUCCESS;
return( ld->ld_msgid );
#else /* !LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS && !LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
if (( LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_DNS ) == LDAP_OPT_ON )
&& ldap_is_dns_dn( dn ) )
{
if (( servers = dn2servers( ld, dn )) == NULL ) {
ber_free( ber, 1 );
return( -1 );
}
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_TRACE ) {
LDAPServer *srv;
for ( srv = servers; srv != NULL;
srv = srv->lsrv_next ) {
fprintf( stderr,
"LDAP server %s: dn %s, port %d\n",
srv->lsrv_host, ( srv->lsrv_dn == NULL ) ?
"(default)" : srv->lsrv_dn,
srv->lsrv_port );
}
}
#endif /* LDAP_DEBUG */
} else {
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
/*
* use of DNS is turned off or this is an X.500 DN...
* use our default connection
*/
servers = NULL;
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
}
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
return( ldap_send_server_request( ld, ber, ld->ld_msgid, NULL, servers,
NULL, 0 ));
#endif /* !LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS && !LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
}
#if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS ) || defined( LDAP_API_FEATURE_X_OPENLDAP_V2_DNS )
int
ldap_send_server_request( LDAP *ld, BerElement *ber, int msgid, LDAPRequest
*parentreq, LDAPServer *srvlist, LDAPConn *lc, int 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 && (parentreq != NULL) ) {
/* Remember the bind in the parent */
incparent = 1;
++parentreq->lr_outrefcnt;
}
lc = ldap_new_connection( ld, &srvlist, 0, 1, bind );
}
free_servers( srvlist );
}
}
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 *)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, LDAPServer **srvlistp, int use_ldsb,
int connect, int bind )
{
LDAPConn *lc;
LDAPServer *prevsrv, *srv;
Sockbuf *sb;
/*
* make a new LDAP server connection
* XXX open connection synchronously for now
*/
if (( lc = (LDAPConn *)calloc( 1, sizeof( LDAPConn ))) == NULL ||
( !use_ldsb && ( (sb = lber_pvt_sb_alloc()) == NULL ))) {
if ( lc != NULL ) {
free( (char *)lc );
}
ld->ld_errno = LDAP_NO_MEMORY;
return( NULL );
}
lc->lconn_sb = ( use_ldsb ) ? &ld->ld_sb : sb;
if ( connect ) {
prevsrv = NULL;
for ( srv = *srvlistp; srv != NULL; srv = srv->lsrv_next ) {
if ( open_ldap_connection( ld, lc->lconn_sb,
srv->lsrv_host, srv->lsrv_port,
&lc->lconn_krbinstance, 0 ) != -1 ) {
break;
}
prevsrv = srv;
}
if ( srv == NULL ) {
if ( !use_ldsb ) {
lber_pvt_sb_free( lc->lconn_sb );
}
free( (char *)lc );
ld->ld_errno = LDAP_SERVER_DOWN;
return( NULL );
}
if ( prevsrv == NULL ) {
*srvlistp = srv->lsrv_next;
} else {
prevsrv->lsrv_next = srv->lsrv_next;
}
lc->lconn_server = 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 ) {
int err, freepasswd, authmethod;
char *binddn, *passwd;
LDAPConn *savedefconn;
freepasswd = err = 0;
if ( ld->ld_rebindproc == 0 ) {
binddn = passwd = "";
authmethod = LDAP_AUTH_SIMPLE;
} else {
if (( err = (*ld->ld_rebindproc)( ld, &binddn, &passwd,
&authmethod, 0 )) == LDAP_SUCCESS ) {
freepasswd = 1;
} else {
ld->ld_errno = err;
err = -1;
}
}
if ( err == 0 ) {
savedefconn = ld->ld_defconn;
ld->ld_defconn = lc;
++lc->lconn_refcnt; /* avoid premature free */
if ( ldap_bind_s( ld, binddn, passwd, authmethod ) !=
LDAP_SUCCESS ) {
err = -1;
}
--lc->lconn_refcnt;
ld->ld_defconn = savedefconn;
}
if ( freepasswd ) {
(*ld->ld_rebindproc)( ld, &binddn, &passwd,
&authmethod, 1 );
}
if ( err != 0 ) {
ldap_free_connection( ld, lc, 1, 0 );
lc = NULL;
}
}
return( lc );
}
static LDAPConn *
find_connection( LDAP *ld, LDAPServer *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;
LDAPServer *ls;
for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
for ( ls = srv; ls != NULL; ls = ls->lsrv_next ) {
if ( lc->lconn_server->lsrv_host != NULL &&
ls->lsrv_host != NULL && strcasecmp(
ls->lsrv_host, lc->lconn_server->lsrv_host ) == 0
&& ls->lsrv_port == lc->lconn_server->lsrv_port ) {
return( lc );
}
if ( !any ) {
break;
}
}
}
return( NULL );
}
static void
use_connection( LDAP *ld, LDAPConn *lc )
{
++lc->lconn_refcnt;
lc->lconn_lastused = time( 0 );
}
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 );
}
ldap_close_connection( lc->lconn_sb );
lber_pvt_sb_destroy( lc->lconn_sb );
ber_clear( &lc->lconn_ber, 1 );
}
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;
}
free_servers( lc->lconn_server );
if ( lc->lconn_krbinstance != NULL ) {
free( lc->lconn_krbinstance );
}
if ( lc->lconn_sb != &ld->ld_sb ) {
lber_pvt_sb_free( lc->lconn_sb );
}
free( lc );
Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: actually freed\n",
0, 0, 0 );
} else {
lc->lconn_lastused = time( 0 );
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->lsrv_host == NULL ) ? "(null)"
: lc->lconn_server->lsrv_host,
lc->lconn_server->lsrv_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\n",
ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
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" :
"Writing" );
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 ) == NULLMSG ) {
fprintf( stderr, " Empty\n" );
}
for ( ; lm != NULLMSG; lm = lm->lm_next ) {
fprintf( stderr, " * msgid %d, type %d\n",
lm->lm_msgid, lm->lm_msgtype );
if (( l = lm->lm_chain ) != NULL ) {
fprintf( stderr, " chained responses:\n" );
for ( ; l != NULLMSG; l = l->lm_chain ) {
fprintf( stderr,
" * msgid %d, type %d\n",
l->lm_msgid, 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 ) {
free( lr->lr_res_error );
}
if ( lr->lr_res_matched != NULL ) {
free( lr->lr_res_matched );
}
free( lr );
}
static void
free_servers( LDAPServer *srvlist )
{
LDAPServer *nextsrv;
while ( srvlist != NULL ) {
nextsrv = srvlist->lsrv_next;
if ( srvlist->lsrv_dn != NULL ) {
free( srvlist->lsrv_dn );
}
if ( srvlist->lsrv_host != NULL ) {
free( srvlist->lsrv_host );
}
free( srvlist );
srvlist = nextsrv;
}
}
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS || LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS
/*
* XXX merging of errors in this routine needs to be improved
*/
int
ldap_chase_referrals( LDAP *ld, LDAPRequest *lr, char **errstrp, int *hadrefp )
{
int rc, count, len, newdn;
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
int ldapref;
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
char *p, *ports, *ref, *tmpref, *refdn, *unfollowed;
LDAPRequest *origreq;
LDAPServer *srv;
BerElement *ber;
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 (( *p == 'R' || *p == 'r' ) && 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 ) {
;
}
unfollowed = NULL;
rc = count = 0;
/* parse out & follow referrals */
for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
ldapref = 0;
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
if (( p = strchr( ref, '\n' )) != NULL ) {
*p++ = '\0';
} else {
p = NULL;
}
len = strlen( ref );
if ( len > LDAP_LDAP_REF_STR_LEN && strncasecmp( ref,
LDAP_LDAP_REF_STR, LDAP_LDAP_REF_STR_LEN ) == 0 ) {
Debug( LDAP_DEBUG_TRACE,
"chasing LDAP referral: <%s>\n", ref, 0, 0 );
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
ldapref = 1;
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
tmpref = ref + LDAP_LDAP_REF_STR_LEN;
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
} else if ( len > LDAP_DX_REF_STR_LEN && strncasecmp( ref,
LDAP_DX_REF_STR, LDAP_DX_REF_STR_LEN ) == 0 ) {
Debug( LDAP_DEBUG_TRACE,
"chasing DX referral: <%s>\n", ref, 0, 0 );
tmpref = ref + LDAP_DX_REF_STR_LEN;
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
} else {
Debug( LDAP_DEBUG_TRACE,
"ignoring unknown referral <%s>\n", ref, 0, 0 );
rc = ldap_append_referral( ld, &unfollowed, ref );
*hadrefp = 1;
continue;
}
*hadrefp = 1;
if (( refdn = strchr( tmpref, '/' )) != NULL ) {
*refdn++ = '\0';
newdn = 1;
} else {
newdn = 0;
}
if (( ber = re_encode_request( ld, origreq->lr_ber,
++ld->ld_msgid, &refdn )) == NULL ) {
return( -1 );
}
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
if ( ldapref ) {
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
if (( srv = (LDAPServer *)calloc( 1,
sizeof( LDAPServer ))) == NULL ) {
ber_free( ber, 1 );
ld->ld_errno = LDAP_NO_MEMORY;
return( -1 );
}
if (( srv->lsrv_host = strdup( tmpref )) == NULL ) {
free( (char *)srv );
ber_free( ber, 1 );
ld->ld_errno = LDAP_NO_MEMORY;
return( -1 );
}
if (( ports = strchr( srv->lsrv_host, ':' )) != NULL ) {
*ports++ = '\0';
srv->lsrv_port = atoi( ports );
} else {
srv->lsrv_port = openldap_ldap_global_options.ldo_defport;
}
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
} else {
srv = dn2servers( ld, tmpref );
}
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
if ( srv != NULL && ldap_send_server_request( ld, ber, ld->ld_msgid,
lr, srv, NULL, 1 ) >= 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 );
}
if ( !newdn && refdn != NULL ) {
free( refdn );
}
}
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 *)malloc( strlen( s ) + LDAP_REF_STR_LEN
+ 1 );
} else {
first = 0;
*referralsp = (char *)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, int msgid, char **dnp )
{
/*
* XXX this routine knows way too much about how the lber library works!
*/
unsigned long along, tag;
long ver;
int rc;
BerElement tmpber, *ber;
char *orig_dn;
Debug( LDAP_DEBUG_TRACE,
"re_encode_request: new msgid %d, new dn <%s>\n",
msgid, ( *dnp == NULL ) ? "NONE" : *dnp, 0 );
tmpber = *origber;
/*
* all LDAP requests are sequences that start with a message id,
* followed by a sequence that is tagged with the operation code
*/
if ( ber_scanf( &tmpber, "{i", &along ) != LDAP_TAG_MSGID ||
( tag = ber_skip_tag( &tmpber, &along )) == LBER_DEFAULT ) {
ld->ld_errno = LDAP_DECODING_ERROR;
return( NULL );
}
if (( ber = ldap_alloc_ber_with_options( ld )) == NULLBER ) {
return( NULL );
}
/* bind requests have a version number before the DN & other stuff */
if ( tag == LDAP_REQ_BIND && ber_get_int( &tmpber, (long *)&ver ) ==
LBER_DEFAULT ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return( NULL );
}
/* the rest of the request is the DN followed by other stuff */
if ( ber_get_stringa( &tmpber, &orig_dn ) == LBER_DEFAULT ) {
ber_free( ber, 1 );
return( NULL );
}
if ( *dnp == NULL ) {
*dnp = orig_dn;
} else {
free( orig_dn );
}
if ( tag == LDAP_REQ_BIND ) {
rc = ber_printf( ber, "{it{is", msgid, tag, ver, *dnp );
} else {
rc = ber_printf( ber, "{it{s", msgid, tag, *dnp );
}
if ( rc == -1 ) {
ber_free( ber, 1 );
return( NULL );
}
if ( ber_write( ber, tmpber.ber_ptr, ( tmpber.ber_end -
tmpber.ber_ptr ), 0 ) != ( tmpber.ber_end - tmpber.ber_ptr ) ||
ber_printf( ber, "}}" ) == -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 );
lber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
}
#endif /* LDAP_DEBUG */
return( ber );
}
LDAPRequest *
ldap_find_request_by_msgid( LDAP *ld, int msgid )
{
LDAPRequest *lr;
for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
if ( msgid == lr->lr_msgid ) {
break;
}
}
return( lr );
}
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS */
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_DNS
static LDAPServer *
dn2servers( LDAP *ld, char *dn ) /* dn can also be a domain.... */
{
char *p, *domain, *host, *server_dn, **dxs;
int i, port;
LDAPServer *srvlist, *prevsrv, *srv;
if (( domain = strrchr( dn, '@' )) != NULL ) {
++domain;
} else {
domain = dn;
}
if (( dxs = ldap_getdxbyname( domain )) == NULL ) {
ld->ld_errno = LDAP_NO_MEMORY;
return( NULL );
}
srvlist = NULL;
for ( i = 0; dxs[ i ] != NULL; ++i ) {
port = openldap_ldap_global_options.ldo_defport;
server_dn = NULL;
if ( strchr( dxs[ i ], ':' ) == NULL ) {
host = dxs[ i ];
} else if ( strlen( dxs[ i ] ) >= 7 &&
strncmp( dxs[ i ], "ldap://", 7 ) == 0 ) {
host = dxs[ i ] + 7;
if (( p = strchr( host, ':' )) == NULL ) {
p = host;
} else {
*p++ = '\0';
port = atoi( p );
}
if (( p = strchr( p, '/' )) != NULL ) {
server_dn = ++p;
if ( *server_dn == '\0' ) {
server_dn = NULL;
}
}
} else {
host = NULL;
}
if ( host != NULL ) { /* found a server we can use */
if (( srv = (LDAPServer *)calloc( 1,
sizeof( LDAPServer ))) == NULL ) {
free_servers( srvlist );
srvlist = NULL;
break; /* exit loop & return */
}
/* add to end of list of servers */
if ( srvlist == NULL ) {
srvlist = srv;
} else {
prevsrv->lsrv_next = srv;
}
prevsrv = srv;
/* copy in info. */
if (( srv->lsrv_host = strdup( host )) == NULL ||
( server_dn != NULL && ( srv->lsrv_dn =
strdup( server_dn )) == NULL )) {
free_servers( srvlist );
srvlist = NULL;
break; /* exit loop & return */
}
srv->lsrv_port = port;
}
}
ldap_value_free( dxs );
if ( srvlist == NULL ) {
ld->ld_errno = LDAP_SERVER_DOWN;
}
return( srvlist );
}
#endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_DNS */
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