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Mozilla/mozilla/directory/c-sdk/ldap/libraries/libldap/request.c
anton.bobrov%sun.com cefc50d379 fix for [Bug 399021] doublefree in nsldapi_free_request 
git-svn-id: svn://10.0.0.236/trunk@237425 18797224-902f-48f8-a5cc-f745e15eee43
2007-10-08 22:15:55 +00:00

1660 lines
44 KiB
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*/
/*
* request.c - sending of ldap requests; handling of referrals
*/
#if 0
#ifndef lint
static char copyright[] = "@(#) Copyright (c) 1995 Regents of the University of Michigan.\nAll rights reserved.\n";
#endif
#endif
#include "ldap-int.h"
static LDAPConn *find_connection( LDAP *ld, LDAPServer *srv, int any );
static void free_servers( LDAPServer *srvlist );
static int chase_one_referral( LDAP *ld, LDAPRequest *lr, LDAPRequest *origreq,
char *refurl, char *desc, int *unknownp, int is_reference );
static int re_encode_request( LDAP *ld, BerElement *origber,
int msgid, LDAPURLDesc *ludp, BerElement **berp, int is_reference );
#ifdef LDAP_DNS
static LDAPServer *dn2servers( LDAP *ld, char *dn );
#endif /* LDAP_DNS */
/* returns an LDAP error code and also sets error inside LDAP * */
int
nsldapi_alloc_ber_with_options( LDAP *ld, BerElement **berp )
{
int err;
LDAP_MUTEX_LOCK( ld, LDAP_OPTION_LOCK );
if (( *berp = ber_alloc_t( ld->ld_lberoptions )) == NULLBER ) {
err = LDAP_NO_MEMORY;
LDAP_SET_LDERRNO( ld, err, NULL, NULL );
} else {
err = LDAP_SUCCESS;
#ifdef STR_TRANSLATION
nsldapi_set_ber_options( ld, *berp );
#endif /* STR_TRANSLATION */
}
LDAP_MUTEX_UNLOCK( ld, LDAP_OPTION_LOCK );
return( err );
}
void
nsldapi_set_ber_options( LDAP *ld, BerElement *ber )
{
ber->ber_options = ld->ld_lberoptions;
#ifdef STR_TRANSLATION
if (( ld->ld_lberoptions & LBER_OPT_TRANSLATE_STRINGS ) != 0 ) {
ber_set_string_translators( ber,
ld->ld_lber_encode_translate_proc,
ld->ld_lber_decode_translate_proc );
}
#endif /* STR_TRANSLATION */
}
/* returns the message id of the request or -1 if an error occurs */
int
nsldapi_send_initial_request( LDAP *ld, int msgid, unsigned long msgtype,
char *dn, BerElement *ber )
{
LDAPServer *servers;
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_send_initial_request\n", 0,0,0 );
#ifdef LDAP_DNS
LDAP_MUTEX_LOCK( ld, LDAP_OPTION_LOCK );
if (( ld->ld_options & LDAP_BITOPT_DNS ) != 0 && ldap_is_dns_dn( dn )) {
if (( servers = dn2servers( ld, dn )) == NULL ) {
ber_free( ber, 1 );
LDAP_MUTEX_UNLOCK( ld, LDAP_OPTION_LOCK );
return( -1 );
}
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_TRACE ) {
LDAPServer *srv;
char msg[256];
for ( srv = servers; srv != NULL;
srv = srv->lsrv_next ) {
sprintf( msg,
"LDAP server %s: dn %s, port %d\n",
srv->lsrv_host, ( srv->lsrv_dn == NULL ) ?
"(default)" : srv->lsrv_dn,
srv->lsrv_port );
ber_err_print( msg );
}
}
#endif /* LDAP_DEBUG */
} else {
#endif /* LDAP_DNS */
/*
* use of DNS is turned off or this is an LDAP DN...
* use our default connection
*/
servers = NULL;
#ifdef LDAP_DNS
}
LDAP_MUTEX_UNLOCK( ld, LDAP_OPTION_LOCK );
#endif /* LDAP_DNS */
return( nsldapi_send_server_request( ld, ber, msgid, NULL,
servers, NULL, ( msgtype == LDAP_REQ_BIND ) ? dn : NULL, 0 ));
}
/* returns the message id of the request or -1 if an error occurs */
int
nsldapi_send_server_request(
LDAP *ld, /* session handle */
BerElement *ber, /* message to send */
int msgid, /* ID of message to send */
LDAPRequest *parentreq, /* non-NULL for referred requests */
LDAPServer *srvlist, /* servers to connect to (NULL for default) */
LDAPConn *lc, /* connection to use (NULL for default) */
char *bindreqdn, /* non-NULL for bind requests */
int bind /* perform a bind after opening new conn.? */
)
{
LDAPRequest *lr;
int err;
int incparent; /* did we bump parent's ref count? */
/* EPIPE and Unsolicited Response handling variables */
int res_rc = 0;
int epipe_err = 0;
int ext_res_rc = 0;
char *ext_oid = NULL;
struct berval *ext_data = NULL;
LDAPMessage *ext_res = NULL;
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_send_server_request\n", 0, 0, 0 );
incparent = 0;
LDAP_MUTEX_LOCK( ld, LDAP_CONN_LOCK );
if ( lc == NULL ) {
if ( srvlist == NULL ) {
if ( ld->ld_defconn == NULL ) {
LDAP_MUTEX_LOCK( ld, LDAP_OPTION_LOCK );
if ( bindreqdn == NULL && ( ld->ld_options
& LDAP_BITOPT_RECONNECT ) != 0 ) {
LDAP_SET_LDERRNO( ld, LDAP_SERVER_DOWN,
NULL, NULL );
ber_free( ber, 1 );
LDAP_MUTEX_UNLOCK( ld, LDAP_OPTION_LOCK );
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
return( -1 );
}
LDAP_MUTEX_UNLOCK( ld, LDAP_OPTION_LOCK );
if ( nsldapi_open_ldap_defconn( ld ) < 0 ) {
ber_free( ber, 1 );
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
return( -1 );
}
}
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 = nsldapi_new_connection( ld, &srvlist, 0,
1, bind );
}
free_servers( srvlist );
}
}
/*
* return a fatal error if:
* 1. no connections exists
* or
* 2. the connection is dead
* or
* 3. it is not in the connected state with normal (non async) I/O
*/
if ( lc == NULL
|| ( lc->lconn_status == LDAP_CONNST_DEAD )
|| ( 0 == (ld->ld_options & LDAP_BITOPT_ASYNC) &&
lc->lconn_status != LDAP_CONNST_CONNECTED) ) {
ber_free( ber, 1 );
if ( lc != NULL ) {
LDAP_SET_LDERRNO( ld, LDAP_SERVER_DOWN, NULL, NULL );
}
if ( incparent ) {
/* Forget about the bind */
--parentreq->lr_outrefcnt;
}
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
return( -1 );
}
if (( lr = nsldapi_new_request( lc, ber, msgid,
1 /* expect a response */)) == NULL
|| ( bindreqdn != NULL && ( bindreqdn =
nsldapi_strdup( bindreqdn )) == NULL )) {
if ( lr != NULL ) {
NSLDAPI_FREE( lr );
}
LDAP_SET_LDERRNO( ld, LDAP_NO_MEMORY, NULL, NULL );
nsldapi_free_connection( ld, lc, NULL, NULL, 0, 0 );
ber_free( ber, 1 );
if ( incparent ) {
/* Forget about the bind */
--parentreq->lr_outrefcnt;
}
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
return( -1 );
}
lr->lr_binddn = bindreqdn;
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;
if ( parentreq->lr_child != NULL ) {
lr->lr_sibling = parentreq->lr_child;
}
parentreq->lr_child = lr;
} else { /* original request */
lr->lr_origid = lr->lr_msgid;
}
LDAP_MUTEX_LOCK( ld, LDAP_REQ_LOCK );
/* add new request to the end of the list of outstanding requests */
nsldapi_queue_request_nolock( ld, lr );
/*
* Issue a non-blocking poll() if we need to check this
* connection's status.
*/
if ( lc->lconn_status == LDAP_CONNST_CONNECTING ||
lc->lconn_pending_requests > 0 ) {
struct timeval tv;
tv.tv_sec = tv.tv_usec = 0;
(void)nsldapi_iostatus_poll( ld, &tv );
}
/*
* If the connect is pending, check to see if it has now completed.
*/
if ( lc->lconn_status == LDAP_CONNST_CONNECTING &&
nsldapi_iostatus_is_write_ready( ld, lc->lconn_sb )) {
lc->lconn_status = LDAP_CONNST_CONNECTED;
LDAPDebug( LDAP_DEBUG_TRACE,
"nsldapi_send_server_request: connection 0x%p -"
" LDAP_CONNST_CONNECTING -> LDAP_CONNST_CONNECTED\n",
lc, 0, 0 );
}
if ( lc->lconn_status == LDAP_CONNST_CONNECTING ||
lc->lconn_pending_requests > 0 ) {
/*
* The connect is not yet complete, or there are existing
* requests that have not yet been sent to the server.
* Delay sending this request.
*/
lr->lr_status = LDAP_REQST_WRITING;
++lc->lconn_pending_requests;
nsldapi_iostatus_interest_write( ld, lc->lconn_sb );
/*
* If the connection is now connected, and it is ready
* to accept some more outbound data, send as many
* pending requests as possible.
*/
if ( lc->lconn_status != LDAP_CONNST_CONNECTING
&& nsldapi_iostatus_is_write_ready( ld, lc->lconn_sb )) {
if ( nsldapi_send_pending_requests_nolock( ld, lc )
== -1 ) { /* error */
/*
* Since nsldapi_send_pending_requests_nolock()
* sets LDAP errno, there is no need to do so
* here.
*/
LDAP_MUTEX_UNLOCK( ld, LDAP_REQ_LOCK );
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
return( -1 );
}
}
} else {
if (( err = nsldapi_send_ber_message( ld, lc->lconn_sb,
ber, 0 /* do not free ber */,
1 /* will handle EPIPE */ )) != 0 ) {
epipe_err = LDAP_GET_ERRNO( ld );
if ( epipe_err == EPIPE ) {
res_rc = nsldapi_result_nolock(ld, LDAP_RES_UNSOLICITED, 1,
1, (struct timeval *) NULL, &ext_res);
if ( ( res_rc == LDAP_RES_EXTENDED ) && ext_res ) {
ext_res_rc = ldap_parse_extended_result( ld, ext_res,
&ext_oid, &ext_data, 0 );
if ( ext_res_rc != LDAP_SUCCESS ) {
if ( ext_res ) {
ldap_msgfree( ext_res );
}
nsldapi_connection_lost_nolock( ld, lc->lconn_sb );
} else {
#ifdef LDAP_DEBUG
LDAPDebug( LDAP_DEBUG_TRACE,
"nsldapi_send_server_request: Unsolicited response\n", 0, 0, 0 );
if ( ext_oid ) {
LDAPDebug( LDAP_DEBUG_TRACE,
"nsldapi_send_server_request: Unsolicited response oid: %s\n",
ext_oid, 0, 0 );
}
if ( ext_data && ext_data->bv_len && ext_data->bv_val ) {
LDAPDebug( LDAP_DEBUG_TRACE,
"nsldapi_send_server_request: Unsolicited response len: %d\n",
ext_data->bv_len, 0, 0 );
LDAPDebug( LDAP_DEBUG_TRACE,
"nsldapi_send_server_request: Unsolicited response val: %s\n",
ext_data->bv_val, 0, 0 );
}
if ( !ext_oid && !ext_data ) {
LDAPDebug( LDAP_DEBUG_TRACE,
"nsldapi_send_server_request: Unsolicited response is empty\n",
0, 0, 0 );
}
#endif /* LDAP_DEBUG */
if ( ext_oid ) {
if ( strcmp ( ext_oid,
LDAP_NOTICE_OF_DISCONNECTION ) == 0 ) {
if ( ext_data ) {
ber_bvfree( ext_data );
}
if ( ext_oid ) {
ldap_memfree( ext_oid );
}
if ( ext_res ) {
ldap_msgfree( ext_res );
}
nsldapi_connection_lost_nolock( ld,
lc->lconn_sb );
nsldapi_free_request( ld, lr, 0 );
nsldapi_free_connection( ld, lc,
NULL, NULL, 0, 0 );
LDAP_MUTEX_UNLOCK( ld, LDAP_REQ_LOCK );
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
return( -1 );
}
}
}
} else {
if ( ext_res ) {
ldap_msgfree( ext_res );
}
nsldapi_connection_lost_nolock( ld, lc->lconn_sb );
}
}
/* need to continue write later */
if (err == -2 ) {
lr->lr_status = LDAP_REQST_WRITING;
++lc->lconn_pending_requests;
nsldapi_iostatus_interest_write( ld, lc->lconn_sb );
} else {
LDAP_SET_LDERRNO( ld, LDAP_SERVER_DOWN, NULL, NULL );
nsldapi_free_request( ld, lr, 0 );
nsldapi_free_connection( ld, lc, NULL, NULL, 0, 0 );
LDAP_MUTEX_UNLOCK( ld, LDAP_REQ_LOCK );
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
return( -1 );
}
} else {
if ( parentreq == NULL ) {
ber->ber_end = ber->ber_ptr;
ber->ber_ptr = ber->ber_buf;
}
/* sent -- waiting for a response */
if (ld->ld_options & LDAP_BITOPT_ASYNC) {
lc->lconn_status = LDAP_CONNST_CONNECTED;
}
nsldapi_iostatus_interest_read( ld, lc->lconn_sb );
}
}
LDAP_MUTEX_UNLOCK( ld, LDAP_REQ_LOCK );
LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
LDAP_SET_LDERRNO( ld, LDAP_SUCCESS, NULL, NULL );
return( msgid );
}
/*
* nsldapi_send_ber_message(): Attempt to send a BER-encoded message.
* If freeit is non-zero, ber is freed when the send succeeds.
* If errno is EPIPE and epipe_handler is set we let the caller
* deal with EPIPE and dont call lost_nolock here but the caller
* should call lost_nolock itself when done with handling EPIPE.
*
* Return values:
* 0: message sent successfully.
* -1: a fatal error occurred while trying to send.
* -2: async. I/O is enabled and the send would block.
*/
int
nsldapi_send_ber_message( LDAP *ld, Sockbuf *sb, BerElement *ber, int freeit,
int epipe_handler )
{
int rc = 0; /* optimistic */
int async = ( 0 != (ld->ld_options & LDAP_BITOPT_ASYNC));
int more_to_send = 1;
while ( more_to_send) {
/*
* ber_flush() doesn't set errno on EOF, so we pre-set it to
* zero to avoid getting tricked by leftover "EAGAIN" errors
*/
LDAP_SET_ERRNO( ld, 0 );
if ( ber_flush( sb, ber, freeit ) == 0 ) {
more_to_send = 0; /* success */
} else {
int terrno = LDAP_GET_ERRNO( ld );
if ( NSLDAPI_ERRNO_IO_INPROGRESS( terrno )) {
if ( async ) {
rc = -2;
break;
}
} else {
if ( !(epipe_handler && ( terrno == EPIPE )) ) {
nsldapi_connection_lost_nolock( ld, sb );
}
rc = -1; /* fatal error */
break;
}
}
}
return( rc );
}
/*
* nsldapi_send_pending_requests_nolock(): Send one or more pending requests
* that are associated with connection 'lc'.
*
* Return values: 0 -- success.
* -1 -- fatal error; connection closed.
*
* Must be called with these two mutexes locked, in this order:
* LDAP_CONN_LOCK
* LDAP_REQ_LOCK
*/
int
nsldapi_send_pending_requests_nolock( LDAP *ld, LDAPConn *lc )
{
int err;
int waiting_for_a_response = 0;
int rc = 0;
LDAPRequest *lr;
char *logname = "nsldapi_send_pending_requests_nolock";
LDAPDebug( LDAP_DEBUG_TRACE, "%s\n", logname, 0, 0 );
for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
/*
* This code relies on the fact that the ld_requests list
* is in order from oldest to newest request (the oldest
* requests that have not yet been sent to the server are
* sent first).
*/
if ( lr->lr_status == LDAP_REQST_WRITING
&& lr->lr_conn == lc ) {
err = nsldapi_send_ber_message( ld, lc->lconn_sb,
lr->lr_ber, 0 /* do not free ber */,
0 /* will not handle EPIPE */ );
if ( err == 0 ) { /* send succeeded */
LDAPDebug( LDAP_DEBUG_TRACE,
"%s: 0x%p SENT\n", logname, lr, 0 );
lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
lr->lr_status = LDAP_REQST_INPROGRESS;
--lc->lconn_pending_requests;
} else if ( err == -2 ) { /* would block */
rc = 0; /* not an error */
LDAPDebug( LDAP_DEBUG_TRACE,
"%s: 0x%p WOULD BLOCK\n", logname, lr, 0 );
break;
} else { /* fatal error */
LDAPDebug( LDAP_DEBUG_TRACE,
"%s: 0x%p FATAL ERROR\n", logname, lr, 0 );
LDAP_SET_LDERRNO( ld, LDAP_SERVER_DOWN,
NULL, NULL );
nsldapi_free_request( ld, lr, 0 );
lr = NULL;
nsldapi_free_connection( ld, lc, NULL, NULL,
0, 0 );
lc = NULL;
rc = -1;
break;
}
}
if (lr->lr_status == LDAP_REQST_INPROGRESS ) {
if (lr->lr_expect_resp) {
++waiting_for_a_response;
} else {
LDAPDebug( LDAP_DEBUG_TRACE,
"%s: 0x%p NO RESPONSE EXPECTED;"
" freeing request \n", logname, lr, 0 );
nsldapi_free_request( ld, lr, 0 );
lr = NULL;
}
}
}
if ( lc != NULL ) {
if ( lc->lconn_pending_requests < 1 ) {
/* no need to poll for "write ready" any longer */
nsldapi_iostatus_interest_clear( ld, lc->lconn_sb );
}
if ( waiting_for_a_response ) {
/* need to poll for "read ready" */
nsldapi_iostatus_interest_read( ld, lc->lconn_sb );
}
}
LDAPDebug( LDAP_DEBUG_TRACE, "%s <- %d\n", logname, rc, 0 );
return( rc );
}
LDAPConn *
nsldapi_new_connection( LDAP *ld, LDAPServer **srvlistp, int use_ldsb,
int connect, int bind )
{
int rc = -1;
LDAPConn *lc;
LDAPServer *prevsrv, *srv;
Sockbuf *sb = NULL;
/*
* make a new LDAP server connection
*/
if (( lc = (LDAPConn *)NSLDAPI_CALLOC( 1, sizeof( LDAPConn ))) == NULL
|| ( !use_ldsb && ( sb = ber_sockbuf_alloc()) == NULL )) {
if ( lc != NULL ) {
NSLDAPI_FREE( (char *)lc );
}
LDAP_SET_LDERRNO( ld, LDAP_NO_MEMORY, NULL, NULL );
return( NULL );
}
LDAP_MUTEX_LOCK( ld, LDAP_OPTION_LOCK );
if ( !use_ldsb ) {
/*
* we have allocated a new sockbuf
* set I/O routines to match those in default LDAP sockbuf
*/
IFP sb_fn;
struct lber_x_ext_io_fns extiofns;
extiofns.lbextiofn_size = LBER_X_EXTIO_FNS_SIZE;
if ( ber_sockbuf_get_option( ld->ld_sbp,
LBER_SOCKBUF_OPT_EXT_IO_FNS, &extiofns ) == 0 ) {
ber_sockbuf_set_option( sb,
LBER_SOCKBUF_OPT_EXT_IO_FNS, &extiofns );
}
if ( ber_sockbuf_get_option( ld->ld_sbp,
LBER_SOCKBUF_OPT_READ_FN, (void *)&sb_fn ) == 0
&& sb_fn != NULL ) {
ber_sockbuf_set_option( sb, LBER_SOCKBUF_OPT_READ_FN,
(void *)sb_fn );
}
if ( ber_sockbuf_get_option( ld->ld_sbp,
LBER_SOCKBUF_OPT_WRITE_FN, (void *)&sb_fn ) == 0
&& sb_fn != NULL ) {
ber_sockbuf_set_option( sb, LBER_SOCKBUF_OPT_WRITE_FN,
(void *)sb_fn );
}
}
lc->lconn_sb = ( use_ldsb ) ? ld->ld_sbp : sb;
lc->lconn_version = ld->ld_version; /* inherited */
LDAP_MUTEX_UNLOCK( ld, LDAP_OPTION_LOCK );
if ( connect ) {
prevsrv = NULL;
/*
* save the return code for later
*/
for ( srv = *srvlistp; srv != NULL; srv = srv->lsrv_next ) {
rc = nsldapi_connect_to_host( ld, lc->lconn_sb,
srv->lsrv_host, srv->lsrv_port,
( srv->lsrv_options & LDAP_SRV_OPT_SECURE ) != 0,
&lc->lconn_krbinstance );
if (rc != -1) {
break;
}
prevsrv = srv;
}
if ( srv == NULL ) {
if ( !use_ldsb ) {
NSLDAPI_FREE( (char *)lc->lconn_sb );
}
NSLDAPI_FREE( (char *)lc );
/* nsldapi_open_ldap_connection has already set ld_errno */
return( NULL );
}
if ( prevsrv == NULL ) {
*srvlistp = srv->lsrv_next;
} else {
prevsrv->lsrv_next = srv->lsrv_next;
}
lc->lconn_server = srv;
}
if ( 0 != (ld->ld_options & LDAP_BITOPT_ASYNC)) {
/*
* Technically, the socket may already be connected but we are
* not sure. By setting the state to LDAP_CONNST_CONNECTING, we
* ensure that we will check the socket status to make sure it
* is connected before we try to send any LDAP messages.
*/
lc->lconn_status = LDAP_CONNST_CONNECTING;
} else {
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, lderr, freepasswd, authmethod;
char *binddn, *passwd;
LDAPConn *savedefconn;
freepasswd = err = 0;
if ( ld->ld_rebind_fn == NULL ) {
binddn = passwd = "";
authmethod = LDAP_AUTH_SIMPLE;
} else {
if (( lderr = (*ld->ld_rebind_fn)( ld, &binddn, &passwd,
&authmethod, 0, ld->ld_rebind_arg ))
== LDAP_SUCCESS ) {
freepasswd = 1;
} else {
LDAP_SET_LDERRNO( ld, lderr, NULL, NULL );
err = -1;
}
}
if ( err == 0 ) {
savedefconn = ld->ld_defconn;
ld->ld_defconn = lc;
++lc->lconn_refcnt; /* avoid premature free */
/*
* when binding, we will back down as low as LDAPv2
* if we get back "protocol error" from bind attempts
*/
for ( ;; ) {
/* LDAP_MUTEX_UNLOCK(ld, LDAP_CONN_LOCK); */
if (( lderr = ldap_bind_s( ld, binddn, passwd,
authmethod )) == LDAP_SUCCESS ) {
/* LDAP_MUTEX_LOCK(ld, LDAP_CONN_LOCK); */
break;
}
/* LDAP_MUTEX_LOCK(ld, LDAP_CONN_LOCK); */
if ( lc->lconn_version <= LDAP_VERSION2
|| lderr != LDAP_PROTOCOL_ERROR ) {
err = -1;
break;
}
--lc->lconn_version; /* try lower version */
}
--lc->lconn_refcnt;
ld->ld_defconn = savedefconn;
}
if ( freepasswd ) {
(*ld->ld_rebind_fn)( ld, &binddn, &passwd,
&authmethod, 1, ld->ld_rebind_arg );
}
if ( err != 0 ) {
nsldapi_free_connection( ld, lc, NULL, NULL, 1, 0 );
lc = NULL;
}
}
return( lc );
}
#define LDAP_CONN_SAMEHOST( h1, h2 ) \
(( (h1) == NULL && (h2) == NULL ) || \
( (h1) != NULL && (h2) != NULL && strcasecmp( (h1), (h2) ) == 0 ))
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 ( LDAP_CONN_SAMEHOST( ls->lsrv_host,
lc->lconn_server->lsrv_host )
&& ls->lsrv_port == lc->lconn_server->lsrv_port
&& ls->lsrv_options ==
lc->lconn_server->lsrv_options ) {
return( lc );
}
if ( !any ) {
break;
}
}
}
return( NULL );
}
void
nsldapi_free_connection( LDAP *ld, LDAPConn *lc, LDAPControl **serverctrls,
LDAPControl **clientctrls, int force, int unbind )
{
LDAPConn *tmplc, *prevlc;
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_free_connection\n", 0, 0, 0 );
if ( force || --lc->lconn_refcnt <= 0 ) {
nsldapi_iostatus_interest_clear( ld, lc->lconn_sb );
if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
if ( unbind ) {
nsldapi_send_unbind( ld, lc->lconn_sb,
serverctrls, clientctrls );
}
}
nsldapi_close_connection( ld, lc->lconn_sb );
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 ) {
NSLDAPI_FREE( lc->lconn_krbinstance );
}
/*
* if this is the default connection (lc->lconn_sb==ld->ld_sbp)
* we do not free the Sockbuf here since it will be freed
* later inside ldap_unbind().
*/
if ( lc->lconn_sb != ld->ld_sbp ) {
ber_sockbuf_free( lc->lconn_sb );
lc->lconn_sb = NULL;
}
if ( lc->lconn_ber != NULLBER ) {
ber_free( lc->lconn_ber, 1 );
}
if ( lc->lconn_binddn != NULL ) {
NSLDAPI_FREE( lc->lconn_binddn );
}
#ifdef LDAP_SASLIO_HOOKS
if ( lc->lconn_sasl_ctx ) { /* the sasl connection context */
sasl_dispose(&lc->lconn_sasl_ctx);
lc->lconn_sasl_ctx = NULL;
}
#endif /* LDAP_SASLIO_HOOKS */
NSLDAPI_FREE( lc );
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_free_connection: actually freed\n",
0, 0, 0 );
} else {
lc->lconn_lastused = time( 0 );
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_free_connection: refcnt %d\n",
lc->lconn_refcnt, 0, 0 );
}
}
#ifdef LDAP_DEBUG
void
nsldapi_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
{
LDAPConn *lc;
char msg[256];
/* CTIME for this platform doesn't use this. */
#if !defined(SUNOS4) && !defined(_WIN32) && !defined(LINUX) && !defined(macintosh)
char buf[26];
#endif
sprintf( msg, "** Connection%s:\n", all ? "s" : "" );
ber_err_print( msg );
for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
if ( lc->lconn_server != NULL ) {
sprintf( msg, "* 0x%p - host: %s port: %d secure: %s%s\n",
lc, ( lc->lconn_server->lsrv_host == NULL ) ? "(null)"
: lc->lconn_server->lsrv_host,
lc->lconn_server->lsrv_port,
( lc->lconn_server->lsrv_options &
LDAP_SRV_OPT_SECURE ) ? "Yes" :
"No", ( lc->lconn_sb == ld->ld_sbp ) ?
" (default)" : "" );
ber_err_print( msg );
}
sprintf( msg, " refcnt: %d pending: %d status: %s\n",
lc->lconn_refcnt, lc->lconn_pending_requests,
( lc->lconn_status == LDAP_CONNST_CONNECTING )
? "Connecting" :
( lc->lconn_status == LDAP_CONNST_DEAD ) ? "Dead" :
"Connected" );
ber_err_print( msg );
sprintf( msg, " last used: %s",
NSLDAPI_CTIME( (time_t *) &lc->lconn_lastused, buf,
sizeof(buf) ));
ber_err_print( msg );
if ( lc->lconn_ber != NULLBER ) {
ber_err_print( " partial response has been received:\n" );
ber_dump( lc->lconn_ber, 1 );
}
ber_err_print( "\n" );
if ( !all ) {
break;
}
}
}
void
nsldapi_dump_requests_and_responses( LDAP *ld )
{
LDAPRequest *lr;
LDAPMessage *lm, *l;
char msg[256];
ber_err_print( "** Outstanding Requests:\n" );
LDAP_MUTEX_LOCK( ld, LDAP_REQ_LOCK );
if (( lr = ld->ld_requests ) == NULL ) {
ber_err_print( " Empty\n" );
}
for ( ; lr != NULL; lr = lr->lr_next ) {
sprintf( msg, " * 0x%p - msgid %d, origid %d, status %s\n",
lr, 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_CONNDEAD ) ? "Dead" :
"Writing" );
ber_err_print( msg );
sprintf( msg, " outstanding referrals %d, parent count %d\n",
lr->lr_outrefcnt, lr->lr_parentcnt );
ber_err_print( msg );
if ( lr->lr_binddn != NULL ) {
sprintf( msg, " pending bind DN: <%s>\n", lr->lr_binddn );
ber_err_print( msg );
}
}
LDAP_MUTEX_UNLOCK( ld, LDAP_REQ_LOCK );
ber_err_print( "** Response Queue:\n" );
LDAP_MUTEX_LOCK( ld, LDAP_RESP_LOCK );
if (( lm = ld->ld_responses ) == NULLMSG ) {
ber_err_print( " Empty\n" );
}
for ( ; lm != NULLMSG; lm = lm->lm_next ) {
sprintf( msg, " * 0x%p - msgid %d, type %d\n",
lm, lm->lm_msgid, lm->lm_msgtype );
ber_err_print( msg );
if (( l = lm->lm_chain ) != NULL ) {
ber_err_print( " chained responses:\n" );
for ( ; l != NULLMSG; l = l->lm_chain ) {
sprintf( msg,
" * 0x%p - msgid %d, type %d\n",
l, l->lm_msgid, l->lm_msgtype );
ber_err_print( msg );
}
}
}
LDAP_MUTEX_UNLOCK( ld, LDAP_RESP_LOCK );
}
#endif /* LDAP_DEBUG */
LDAPRequest *
nsldapi_new_request( LDAPConn *lc, BerElement *ber, int msgid, int expect_resp )
{
LDAPRequest *lr;
lr = (LDAPRequest *)NSLDAPI_CALLOC( 1, sizeof( LDAPRequest ));
if ( lr != NULL ) {
lr->lr_conn = lc;
lr->lr_ber = ber;
lr->lr_msgid = lr->lr_origid = msgid;
lr->lr_expect_resp = expect_resp;
lr->lr_status = LDAP_REQST_INPROGRESS;
lr->lr_res_errno = LDAP_SUCCESS; /* optimistic */
if ( lc != NULL ) { /* mark connection as in use */
++lc->lconn_refcnt;
lc->lconn_lastused = time( 0 );
}
}
return( lr );
}
void
nsldapi_free_request( LDAP *ld, LDAPRequest *lr, int free_conn )
{
LDAPRequest *tmplr, *nextlr;
LDAPDebug( LDAP_DEBUG_TRACE,
"nsldapi_free_request 0x%p (origid %d, msgid %d)\n",
lr, lr->lr_origid, lr->lr_msgid );
if ( lr->lr_parent != NULL ) {
/* unlink child from parent */
lr->lr_parent->lr_child = NULL;
--lr->lr_parent->lr_outrefcnt;
}
if ( lr->lr_status == LDAP_REQST_WRITING ) {
--lr->lr_conn->lconn_pending_requests;
}
/* free all of our spawned referrals (child requests) */
for ( tmplr = lr->lr_child; tmplr != NULL; tmplr = nextlr ) {
nextlr = tmplr->lr_sibling;
nsldapi_free_request( ld, tmplr, free_conn );
}
if ( free_conn ) {
nsldapi_free_connection( ld, lr->lr_conn, NULL, NULL, 0, 1 );
}
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 ) {
NSLDAPI_FREE( lr->lr_res_error );
}
if ( lr->lr_res_matched != NULL ) {
NSLDAPI_FREE( lr->lr_res_matched );
}
if ( lr->lr_binddn != NULL ) {
NSLDAPI_FREE( lr->lr_binddn );
}
if ( lr->lr_res_ctrls != NULL ) {
ldap_controls_free( lr->lr_res_ctrls );
}
NSLDAPI_FREE( lr );
}
/*
* Add a request to the end of the list of outstanding requests.
* This function must be called with these two locks in hand, acquired in
* this order:
* LDAP_CONN_LOCK
* LDAP_REQ_LOCK
*/
void
nsldapi_queue_request_nolock( LDAP *ld, LDAPRequest *lr )
{
if ( NULL == ld->ld_requests ) {
ld->ld_requests = lr;
} else {
LDAPRequest *tmplr;
for ( tmplr = ld->ld_requests; tmplr->lr_next != NULL;
tmplr = tmplr->lr_next ) {
;
}
tmplr->lr_next = lr;
lr->lr_prev = tmplr;
}
}
static void
free_servers( LDAPServer *srvlist )
{
LDAPServer *nextsrv;
while ( srvlist != NULL ) {
nextsrv = srvlist->lsrv_next;
if ( srvlist->lsrv_dn != NULL ) {
NSLDAPI_FREE( srvlist->lsrv_dn );
}
if ( srvlist->lsrv_host != NULL ) {
NSLDAPI_FREE( srvlist->lsrv_host );
}
NSLDAPI_FREE( srvlist );
srvlist = nextsrv;
}
}
/*
* Initiate chasing of LDAPv2+ (Umich extension) referrals.
*
* Returns an LDAP error code.
*
* Note that *hadrefp will be set to 1 if one or more referrals were found in
* "*errstrp" (even if we can't chase them) and zero if none were found.
*
* XXX merging of errors in this routine needs to be improved.
*/
int
nsldapi_chase_v2_referrals( LDAP *ld, LDAPRequest *lr, char **errstrp,
int *totalcountp, int *chasingcountp )
{
char *p, *ref, *unfollowed;
LDAPRequest *origreq;
int rc, tmprc, len, unknown;
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_chase_v2_referrals\n", 0, 0, 0 );
*totalcountp = *chasingcountp = 0;
if ( *errstrp == NULL ) {
return( LDAP_SUCCESS );
}
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( LDAP_SUCCESS );
}
if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
LDAPDebug( LDAP_DEBUG_TRACE,
"more than %d referral hops (dropping)\n",
ld->ld_refhoplimit, 0, 0 );
return( LDAP_REFERRAL_LIMIT_EXCEEDED );
}
/* find original request */
for ( origreq = lr; origreq->lr_parent != NULL;
origreq = origreq->lr_parent ) {
;
}
unfollowed = NULL;
rc = LDAP_SUCCESS;
/* parse out & follow referrals */
for ( ref = p; rc == LDAP_SUCCESS && ref != NULL; ref = p ) {
if (( p = strchr( ref, '\n' )) != NULL ) {
*p++ = '\0';
} else {
p = NULL;
}
++*totalcountp;
rc = chase_one_referral( ld, lr, origreq, ref, "v2 referral",
&unknown, 0 /* not a reference */ );
if ( rc != LDAP_SUCCESS || unknown ) {
if (( tmprc = nsldapi_append_referral( ld, &unfollowed,
ref )) != LDAP_SUCCESS ) {
rc = tmprc;
}
} else {
++*chasingcountp;
}
}
NSLDAPI_FREE( *errstrp );
*errstrp = unfollowed;
return( rc );
}
/* returns an LDAP error code */
int
nsldapi_chase_v3_refs( LDAP *ld, LDAPRequest *lr, char **v3refs,
int is_reference, int *totalcountp, int *chasingcountp )
{
int rc = LDAP_SUCCESS;
int i, unknown;
LDAPRequest *origreq;
*totalcountp = *chasingcountp = 0;
if ( v3refs == NULL || v3refs[0] == NULL ) {
return( LDAP_SUCCESS );
}
*totalcountp = 1;
if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
LDAPDebug( LDAP_DEBUG_TRACE,
"more than %d referral hops (dropping)\n",
ld->ld_refhoplimit, 0, 0 );
return( LDAP_REFERRAL_LIMIT_EXCEEDED );
}
/* find original request */
for ( origreq = lr; origreq->lr_parent != NULL;
origreq = origreq->lr_parent ) {
;
}
/*
* in LDAPv3, we just need to follow one referral in the set.
* we dp this by stopping as soon as we succeed in initiating a
* chase on any referral (basically this means we were able to connect
* to the server and bind).
*/
for ( i = 0; v3refs[i] != NULL; ++i ) {
rc = chase_one_referral( ld, lr, origreq, v3refs[i],
is_reference ? "v3 reference" : "v3 referral", &unknown,
is_reference );
if ( rc == LDAP_SUCCESS && !unknown ) {
*chasingcountp = 1;
break;
}
}
/* XXXmcs: should we save unfollowed referrals somewhere? */
return( rc ); /* last error is as good as any other I guess... */
}
/*
* returns an LDAP error code
*
* XXXmcs: this function used to have #ifdef LDAP_DNS code in it but I
* removed it when I improved the parsing (we don't define LDAP_DNS
* here at Netscape).
*/
static int
chase_one_referral( LDAP *ld, LDAPRequest *lr, LDAPRequest *origreq,
char *refurl, char *desc, int *unknownp, int is_reference )
{
int rc, tmprc, secure, msgid;
LDAPServer *srv;
BerElement *ber;
LDAPURLDesc *ludp;
*unknownp = 0;
ludp = NULLLDAPURLDESC;
if ( nsldapi_url_parse( refurl, &ludp, 0 ) != 0 ) {
LDAPDebug( LDAP_DEBUG_TRACE,
"ignoring unknown %s <%s>\n", desc, refurl, 0 );
*unknownp = 1;
rc = LDAP_SUCCESS;
goto cleanup_and_return;
}
secure = (( ludp->lud_options & LDAP_URL_OPT_SECURE ) != 0 );
/* XXXmcs: can't tell if secure is supported by connect callback */
if ( secure && ld->ld_extconnect_fn == NULL ) {
LDAPDebug( LDAP_DEBUG_TRACE,
"ignoring LDAPS %s <%s>\n", desc, refurl, 0 );
*unknownp = 1;
rc = LDAP_SUCCESS;
goto cleanup_and_return;
}
LDAPDebug( LDAP_DEBUG_TRACE, "chasing LDAP%s %s: <%s>\n",
secure ? "S" : "", desc, refurl );
LDAP_MUTEX_LOCK( ld, LDAP_MSGID_LOCK );
msgid = ++ld->ld_msgid;
LDAP_MUTEX_UNLOCK( ld, LDAP_MSGID_LOCK );
if (( tmprc = re_encode_request( ld, origreq->lr_ber, msgid,
ludp, &ber, is_reference )) != LDAP_SUCCESS ) {
rc = tmprc;
goto cleanup_and_return;
}
if (( srv = (LDAPServer *)NSLDAPI_CALLOC( 1, sizeof( LDAPServer )))
== NULL ) {
ber_free( ber, 1 );
rc = LDAP_NO_MEMORY;
goto cleanup_and_return;
}
if ( ludp->lud_host == NULL && ld->ld_defhost == NULL ) {
srv->lsrv_host = NULL;
} else {
if ( ludp->lud_host == NULL ) {
srv->lsrv_host =
nsldapi_strdup( origreq->lr_conn->lconn_server->lsrv_host );
LDAPDebug( LDAP_DEBUG_TRACE,
"chase_one_referral: using hostname '%s' from original "
"request on new request\n",
srv->lsrv_host, 0, 0);
} else {
srv->lsrv_host = nsldapi_strdup( ludp->lud_host );
LDAPDebug( LDAP_DEBUG_TRACE,
"chase_one_referral: using hostname '%s' as specified "
"on new request\n",
srv->lsrv_host, 0, 0);
}
if ( srv->lsrv_host == NULL ) {
NSLDAPI_FREE( (char *)srv );
ber_free( ber, 1 );
rc = LDAP_NO_MEMORY;
goto cleanup_and_return;
}
}
if ( ludp->lud_port == 0 && ludp->lud_host == NULL ) {
srv->lsrv_port = origreq->lr_conn->lconn_server->lsrv_port;
LDAPDebug( LDAP_DEBUG_TRACE,
"chase_one_referral: using port (%d) from original "
"request on new request\n",
srv->lsrv_port, 0, 0);
} else if ( ludp->lud_port != 0 ) {
srv->lsrv_port = ludp->lud_port;
LDAPDebug( LDAP_DEBUG_TRACE,
"chase_one_referral: using port (%d) as specified on "
"new request\n",
srv->lsrv_port, 0, 0);
} else {
srv->lsrv_port = secure ? LDAPS_PORT : LDAP_PORT;
LDAPDebug( LDAP_DEBUG_TRACE,
"chase_one_referral: using default port (%d)\n",
srv->lsrv_port, 0, 0 );
}
if ( secure ) {
srv->lsrv_options |= LDAP_SRV_OPT_SECURE;
}
if ( nsldapi_send_server_request( ld, ber, msgid,
lr, srv, NULL, NULL, 1 ) < 0 ) {
rc = LDAP_GET_LDERRNO( ld, NULL, NULL );
LDAPDebug( LDAP_DEBUG_ANY, "Unable to chase %s %s (%s)\n",
desc, refurl, ldap_err2string( rc ));
} else {
rc = LDAP_SUCCESS;
}
cleanup_and_return:
if ( ludp != NULLLDAPURLDESC ) {
ldap_free_urldesc( ludp );
}
return( rc );
}
/* returns an LDAP error code */
int
nsldapi_append_referral( LDAP *ld, char **referralsp, char *s )
{
int first;
if ( *referralsp == NULL ) {
first = 1;
*referralsp = (char *)NSLDAPI_MALLOC( strlen( s ) +
LDAP_REF_STR_LEN + 1 );
} else {
first = 0;
*referralsp = (char *)NSLDAPI_REALLOC( *referralsp,
strlen( *referralsp ) + strlen( s ) + 2 );
}
if ( *referralsp == NULL ) {
return( LDAP_NO_MEMORY );
}
if ( first ) {
strcpy( *referralsp, LDAP_REF_STR );
} else {
strcat( *referralsp, "\n" );
}
strcat( *referralsp, s );
return( LDAP_SUCCESS );
}
/* returns an LDAP error code */
static int
re_encode_request( LDAP *ld, BerElement *origber, int msgid, LDAPURLDesc *ludp,
BerElement **berp, int is_reference )
{
/*
* XXX this routine knows way too much about how the lber library works!
*/
ber_int_t origmsgid;
ber_tag_t tag;
ber_int_t ver;
int rc;
BerElement *ber;
struct berelement tmpber;
char *dn, *orig_dn;
/* extra stuff for search request */
ber_int_t scope = -1;
LDAPDebug( LDAP_DEBUG_TRACE,
"re_encode_request: new msgid %d, new dn <%s>\n",
msgid, ( ludp->lud_dn == NULL ) ? "NONE" : ludp->lud_dn, 0 );
tmpber = *origber;
/*
* All LDAP requests are sequences that start with a message id. For
* everything except delete requests, this is followed by a sequence
* that is tagged with the operation code. For deletes, there is just
* a DN that is tagged with the operation code.
*/
/* skip past msgid and get operation tag */
if ( ber_scanf( &tmpber, "{it", &origmsgid, &tag ) == LBER_ERROR ) {
return( LDAP_DECODING_ERROR );
}
/*
* XXXmcs: we don't support filters in search referrals yet,
* so if present we return an error which is probably
* better than just ignoring the extra info.
* XXXrichm: we now support scopes. Supporting filters would require
* a lot more additional work to be able to read the filter from
* the ber original search request, convert to string, etc. It might
* be better and easier to change nsldapi_build_search_req to have
* some special mode by which you could tell it to skip filter and
* attrlist encoding if no filter was given - then we could just
* create a new ber search request with our new filter if present.
*/
if ( ( tag == LDAP_REQ_SEARCH ) && ( ludp->lud_filter != NULL )) {
return( LDAP_LOCAL_ERROR );
}
if ( tag == LDAP_REQ_BIND ) {
/* bind requests have a version number before the DN */
rc = ber_scanf( &tmpber, "{ia", &ver, &orig_dn );
} else if ( tag == LDAP_REQ_DELETE ) {
/* delete requests DNs are not within a sequence */
rc = ber_scanf( &tmpber, "a", &orig_dn );
} else if ( tag == LDAP_REQ_SEARCH ) {
/* need scope */
rc = ber_scanf( &tmpber, "{ae", &orig_dn, &scope );
} else {
rc = ber_scanf( &tmpber, "{a", &orig_dn );
}
if ( rc == LBER_ERROR ) {
return( LDAP_DECODING_ERROR );
}
if ( ludp->lud_dn == NULL ) {
dn = orig_dn;
} else {
dn = ludp->lud_dn;
NSLDAPI_FREE( orig_dn );
orig_dn = NULL;
}
if ( ludp->lud_scope != -1 ) {
scope = ludp->lud_scope; /* scope provided by ref - use it */
} else if (is_reference) {
/*
* RFC 4511 says that the we should use scope BASE in the
* search reference if the client's original request was for scope
* ONELEVEL - since the server did not include the scope in the
* search reference returned, we must provide the correct behavior
* in the client (i.e. the correct behavior is implied)
* see RFC 4511 section 4.5.3 for more information
*/
if (scope == LDAP_SCOPE_ONELEVEL) {
scope = LDAP_SCOPE_BASE;
}
}
/* allocate and build the new request */
if (( rc = nsldapi_alloc_ber_with_options( ld, &ber ))
!= LDAP_SUCCESS ) {
if ( orig_dn != NULL ) {
NSLDAPI_FREE( orig_dn );
}
return( rc );
}
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, "{its}", 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 );
}
if ( orig_dn != NULL ) {
NSLDAPI_FREE( orig_dn );
}
/*
* can't use "dn" or "orig_dn" from this point on (they've been freed)
*/
if ( rc == -1 ) {
ber_free( ber, 1 );
return( LDAP_ENCODING_ERROR );
}
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, "}}" ) == -1 )) {
ber_free( ber, 1 );
return( LDAP_ENCODING_ERROR );
}
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
LDAPDebug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
0, 0, 0 );
ber_dump( ber, 0 );
}
#endif /* LDAP_DEBUG */
*berp = ber;
return( LDAP_SUCCESS );
}
LDAPRequest *
nsldapi_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 );
}
/*
* nsldapi_connection_lost_nolock() resets "ld" to a non-connected, known
* state. It should be called whenever a fatal error occurs on the
* Sockbuf "sb." sb == NULL means we don't know specifically where
* the problem was so we assume all connections are bad.
*/
void
nsldapi_connection_lost_nolock( LDAP *ld, Sockbuf *sb )
{
LDAPRequest *lr;
/*
* change status of all pending requests that are associated with "sb
* to "connection dead."
* also change the connection status to "dead" and remove it from
* the list of sockets we are interested in.
*/
for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
if ( sb == NULL ||
( lr->lr_conn != NULL && lr->lr_conn->lconn_sb == sb )) {
lr->lr_status = LDAP_REQST_CONNDEAD;
if ( lr->lr_conn != NULL ) {
lr->lr_conn->lconn_status = LDAP_CONNST_DEAD;
nsldapi_iostatus_interest_clear( ld,
lr->lr_conn->lconn_sb );
}
}
}
}
#ifdef LDAP_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 = nsldapi_getdxbyname( domain )) == NULL ) {
LDAP_SET_LDERRNO( ld, LDAP_NO_MEMORY, NULL, NULL );
return( NULL );
}
srvlist = NULL;
for ( i = 0; dxs[ i ] != NULL; ++i ) {
port = LDAP_PORT;
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 *)NSLDAPI_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 = nsldapi_strdup( host )) == NULL
|| ( server_dn != NULL && ( srv->lsrv_dn =
nsldapi_strdup( server_dn )) == NULL )) {
free_servers( srvlist );
srvlist = NULL;
break; /* exit loop & return */
}
srv->lsrv_port = port;
}
}
ldap_value_free( dxs );
if ( srvlist == NULL ) {
LDAP_SET_LDERRNO( ld, LDAP_SERVER_DOWN, NULL, NULL );
}
return( srvlist );
}
#endif /* LDAP_DNS */
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