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c6f12694fc
openldap/servers/slapd/back-meta/search.c
Pierangelo Masarati c6f12694fc allow proxies to filter out search references (ITS#5593)
2008-07-07 21:25:59 +00:00

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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1999-2008 The OpenLDAP Foundation.
* Portions Copyright 2001-2003 Pierangelo Masarati.
* Portions Copyright 1999-2003 Howard Chu.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by the Howard Chu for inclusion
* in OpenLDAP Software and subsequently enhanced by Pierangelo
* Masarati.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "lutil.h"
#include "slap.h"
#include "../back-ldap/back-ldap.h"
#include "back-meta.h"
#undef ldap_debug /* silence a warning in ldap-int.h */
#include "ldap_log.h"
#include "../../../libraries/libldap/ldap-int.h"
/* IGNORE means that target does not (no longer) participate
* in the search;
* NOTREADY means the search on that target has not been initialized yet
*/
#define META_MSGID_IGNORE (-1)
#define META_MSGID_NEED_BIND (-2)
#define META_MSGID_CONNECTING (-3)
static int
meta_send_entry(
Operation *op,
SlapReply *rs,
metaconn_t *mc,
int i,
LDAPMessage *e );
typedef enum meta_search_candidate_t {
META_SEARCH_UNDEFINED = -2,
META_SEARCH_ERR = -1,
META_SEARCH_NOT_CANDIDATE,
META_SEARCH_CANDIDATE,
META_SEARCH_BINDING,
META_SEARCH_NEED_BIND,
META_SEARCH_CONNECTING
} meta_search_candidate_t;
/*
* meta_search_dobind_init()
*
* initiates bind for a candidate target of a search.
*/
static meta_search_candidate_t
meta_search_dobind_init(
Operation *op,
SlapReply *rs,
metaconn_t **mcp,
int candidate,
SlapReply *candidates )
{
metaconn_t *mc = *mcp;
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
struct berval binddn = msc->msc_bound_ndn,
cred = msc->msc_cred;
int method;
int rc;
meta_search_candidate_t retcode;
Debug( LDAP_DEBUG_TRACE, "%s >>> meta_search_dobind_init[%d]\n",
op->o_log_prefix, candidate, 0 );
/*
* all the targets are already bound as pseudoroot
*/
if ( mc->mc_authz_target == META_BOUND_ALL ) {
return META_SEARCH_CANDIDATE;
}
retcode = META_SEARCH_BINDING;
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
/* already bound (or anonymous) */
#ifdef DEBUG_205
char buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
int bound = 0;
if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
bound = 1;
}
snprintf( buf, sizeof( buf ), " mc=%p ld=%p%s DN=\"%s\"",
(void *)mc, (void *)msc->msc_ld,
bound ? " bound" : " anonymous",
bound == 0 ? "" : msc->msc_bound_ndn.bv_val );
Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
op->o_log_prefix, candidate, buf );
#endif /* DEBUG_205 */
retcode = META_SEARCH_CANDIDATE;
} else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) ) {
/* another thread is binding the target for this conn; wait */
#ifdef DEBUG_205
char buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
snprintf( buf, sizeof( buf ), " mc=%p ld=%p needbind",
(void *)mc, (void *)msc->msc_ld );
Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
op->o_log_prefix, candidate, buf );
#endif /* DEBUG_205 */
candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
retcode = META_SEARCH_NEED_BIND;
} else {
/* we'll need to bind the target for this conn */
#ifdef DEBUG_205
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf ), " mc=%p ld=%p binding",
(void *)mc, (void *)msc->msc_ld );
Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
op->o_log_prefix, candidate, buf );
#endif /* DEBUG_205 */
if ( msc->msc_ld == NULL ) {
/* for some reason (e.g. because formerly in "binding"
* state, with eventual connection expiration or invalidation)
* it was not initialized as expected */
Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] mc=%p ld=NULL\n",
op->o_log_prefix, candidate, (void *)mc );
rc = meta_back_init_one_conn( op, rs, *mcp, candidate,
LDAP_BACK_CONN_ISPRIV( *mcp ), LDAP_BACK_DONTSEND, 0 );
switch ( rc ) {
case LDAP_SUCCESS:
assert( msc->msc_ld != NULL );
break;
case LDAP_SERVER_DOWN:
case LDAP_UNAVAILABLE:
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
goto down;
default:
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
goto other;
}
}
LDAP_BACK_CONN_BINDING_SET( msc );
}
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
if ( retcode != META_SEARCH_BINDING ) {
return retcode;
}
/* NOTE: this obsoletes pseudorootdn */
if ( op->o_conn != NULL &&
!op->o_do_not_cache &&
( BER_BVISNULL( &msc->msc_bound_ndn ) ||
BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
{
rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, LDAP_BACK_DONTSEND, &binddn, &cred, &method );
if ( rc != LDAP_SUCCESS ) {
goto down;
}
/* NOTE: we copy things here, even if bind didn't succeed yet,
* because the connection is not shared until bind is over */
if ( !BER_BVISNULL( &binddn ) ) {
ber_bvreplace( &msc->msc_bound_ndn, &binddn );
if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &cred ) ) {
if ( !BER_BVISNULL( &msc->msc_cred ) ) {
memset( msc->msc_cred.bv_val, 0,
msc->msc_cred.bv_len );
}
ber_bvreplace( &msc->msc_cred, &cred );
}
}
if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
/* apparently, idassert was configured with SASL bind,
* so bind occurred inside meta_back_proxy_authz_cred() */
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
LDAP_BACK_CONN_BINDING_CLEAR( msc );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
return META_SEARCH_CANDIDATE;
}
/* paranoid */
switch ( method ) {
case LDAP_AUTH_NONE:
case LDAP_AUTH_SIMPLE:
/* do a simple bind with binddn, cred */
break;
default:
assert( 0 );
break;
}
}
assert( msc->msc_ld != NULL );
/* connect must be async only the first time... */
ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_ON );
retry:;
rc = ldap_sasl_bind( msc->msc_ld, binddn.bv_val, LDAP_SASL_SIMPLE, &cred,
NULL, NULL, &candidates[ candidate ].sr_msgid );
#ifdef DEBUG_205
{
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf ), "meta_search_dobind_init[%d] mc=%p ld=%p rc=%d",
candidate, (void *)mc, (void *)mc->mc_conns[ candidate ].msc_ld, rc );
Debug( LDAP_DEBUG_ANY, "### %s %s\n",
op->o_log_prefix, buf, 0 );
}
#endif /* DEBUG_205 */
switch ( rc ) {
case LDAP_SUCCESS:
assert( candidates[ candidate ].sr_msgid >= 0 );
META_BINDING_SET( &candidates[ candidate ] );
return META_SEARCH_BINDING;
case LDAP_X_CONNECTING:
/* must retry, same conn */
candidates[ candidate ].sr_msgid = META_MSGID_CONNECTING;
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
LDAP_BACK_CONN_BINDING_CLEAR( msc );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
return META_SEARCH_CONNECTING;
case LDAP_SERVER_DOWN:
down:;
/* This is the worst thing that could happen:
* the search will wait until the retry is over. */
if ( !META_IS_RETRYING( &candidates[ candidate ] ) ) {
META_RETRYING_SET( &candidates[ candidate ] );
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
assert( mc->mc_refcnt > 0 );
if ( LogTest( LDAP_DEBUG_ANY ) ) {
char buf[ SLAP_TEXT_BUFLEN ];
/* this lock is required; however,
* it's invoked only when logging is on */
ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
snprintf( buf, sizeof( buf ),
"retrying URI=\"%s\" DN=\"%s\"",
mt->mt_uri,
BER_BVISNULL( &msc->msc_bound_ndn ) ?
"" : msc->msc_bound_ndn.bv_val );
ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
Debug( LDAP_DEBUG_ANY,
"%s meta_search_dobind_init[%d]: %s.\n",
op->o_log_prefix, candidate, buf );
}
meta_clear_one_candidate( op, mc, candidate );
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
/* mc here must be the regular mc, reset and ready for init */
rc = meta_back_init_one_conn( op, rs, mc, candidate,
LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );
if ( rc == LDAP_SUCCESS ) {
LDAP_BACK_CONN_BINDING_SET( msc );
}
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
if ( rc == LDAP_SUCCESS ) {
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
goto retry;
}
}
if ( *mcp == NULL ) {
retcode = META_SEARCH_ERR;
rs->sr_err = LDAP_UNAVAILABLE;
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
break;
}
/* fall thru */
default:
other:;
rs->sr_err = rc;
rc = slap_map_api2result( rs );
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
meta_clear_one_candidate( op, mc, candidate );
candidates[ candidate ].sr_err = rc;
if ( META_BACK_ONERR_STOP( mi ) ) {
LDAP_BACK_CONN_TAINTED_SET( mc );
meta_back_release_conn_lock( mi, mc, 0 );
*mcp = NULL;
rs->sr_err = rc;
retcode = META_SEARCH_ERR;
} else {
retcode = META_SEARCH_NOT_CANDIDATE;
}
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
break;
}
return retcode;
}
static meta_search_candidate_t
meta_search_dobind_result(
Operation *op,
SlapReply *rs,
metaconn_t **mcp,
int candidate,
SlapReply *candidates,
LDAPMessage *res )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metaconn_t *mc = *mcp;
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
meta_search_candidate_t retcode = META_SEARCH_NOT_CANDIDATE;
int rc;
assert( msc->msc_ld != NULL );
/* FIXME: matched? referrals? response controls? */
rc = ldap_parse_result( msc->msc_ld, res,
&candidates[ candidate ].sr_err,
NULL, NULL, NULL, NULL, 0 );
if ( rc != LDAP_SUCCESS ) {
candidates[ candidate ].sr_err = rc;
} else {
rc = slap_map_api2result( &candidates[ candidate ] );
}
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
LDAP_BACK_CONN_BINDING_CLEAR( msc );
if ( rc != LDAP_SUCCESS ) {
meta_clear_one_candidate( op, mc, candidate );
candidates[ candidate ].sr_err = rc;
if ( META_BACK_ONERR_STOP( mi ) ) {
LDAP_BACK_CONN_TAINTED_SET( mc );
meta_back_release_conn_lock( mi, mc, 0 );
*mcp = NULL;
retcode = META_SEARCH_ERR;
rs->sr_err = rc;
}
} else {
/* FIXME: check if bound as idassert authcDN! */
if ( BER_BVISNULL( &msc->msc_bound_ndn )
|| BER_BVISEMPTY( &msc->msc_bound_ndn ) )
{
LDAP_BACK_CONN_ISANON_SET( msc );
} else {
LDAP_BACK_CONN_ISBOUND_SET( msc );
}
retcode = META_SEARCH_CANDIDATE;
/* connect must be async */
ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_OFF );
}
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
META_BINDING_CLEAR( &candidates[ candidate ] );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
return retcode;
}
static meta_search_candidate_t
meta_back_search_start(
Operation *op,
SlapReply *rs,
dncookie *dc,
metaconn_t **mcp,
int candidate,
SlapReply *candidates )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
metasingleconn_t *msc = &(*mcp)->mc_conns[ candidate ];
struct berval realbase = op->o_req_dn;
int realscope = op->ors_scope;
struct berval mbase = BER_BVNULL;
struct berval mfilter = BER_BVNULL;
char **mapped_attrs = NULL;
int rc;
meta_search_candidate_t retcode;
struct timeval tv, *tvp = NULL;
int nretries = 1;
LDAPControl **ctrls = NULL;
/* this should not happen; just in case... */
if ( msc->msc_ld == NULL ) {
Debug( LDAP_DEBUG_ANY,
"%s: meta_back_search_start candidate=%d ld=NULL%s.\n",
op->o_log_prefix, candidate,
META_BACK_ONERR_STOP( mi ) ? "" : " (ignored)" );
candidates[ candidate ].sr_err = LDAP_OTHER;
if ( META_BACK_ONERR_STOP( mi ) ) {
return META_SEARCH_ERR;
}
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
return META_SEARCH_NOT_CANDIDATE;
}
Debug( LDAP_DEBUG_TRACE, "%s >>> meta_back_search_start[%d]\n", op->o_log_prefix, candidate, 0 );
/*
* modifies the base according to the scope, if required
*/
if ( mt->mt_nsuffix.bv_len > op->o_req_ndn.bv_len ) {
switch ( op->ors_scope ) {
case LDAP_SCOPE_SUBTREE:
/*
* make the target suffix the new base
* FIXME: this is very forgiving, because
* "illegal" searchBases may be turned
* into the suffix of the target; however,
* the requested searchBase already passed
* thru the candidate analyzer...
*/
if ( dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) ) {
realbase = mt->mt_nsuffix;
if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
realscope = LDAP_SCOPE_SUBORDINATE;
}
} else {
/*
* this target is no longer candidate
*/
retcode = META_SEARCH_NOT_CANDIDATE;
goto doreturn;
}
break;
case LDAP_SCOPE_SUBORDINATE:
case LDAP_SCOPE_ONELEVEL:
{
struct berval rdn = mt->mt_nsuffix;
rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
if ( dnIsOneLevelRDN( &rdn )
&& dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) )
{
/*
* if there is exactly one level,
* make the target suffix the new
* base, and make scope "base"
*/
realbase = mt->mt_nsuffix;
if ( op->ors_scope == LDAP_SCOPE_SUBORDINATE ) {
if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
realscope = LDAP_SCOPE_SUBORDINATE;
} else {
realscope = LDAP_SCOPE_SUBTREE;
}
} else {
realscope = LDAP_SCOPE_BASE;
}
break;
} /* else continue with the next case */
}
case LDAP_SCOPE_BASE:
/*
* this target is no longer candidate
*/
retcode = META_SEARCH_NOT_CANDIDATE;
goto doreturn;
}
}
/* initiate dobind */
retcode = meta_search_dobind_init( op, rs, mcp, candidate, candidates );
Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%d]=%d\n", op->o_log_prefix, candidate, retcode );
if ( retcode != META_SEARCH_CANDIDATE ) {
goto doreturn;
}
/*
* Rewrite the search base, if required
*/
dc->target = mt;
dc->ctx = "searchBase";
switch ( ldap_back_dn_massage( dc, &realbase, &mbase ) ) {
case LDAP_SUCCESS:
break;
case LDAP_UNWILLING_TO_PERFORM:
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
rs->sr_text = "Operation not allowed";
send_ldap_result( op, rs );
retcode = META_SEARCH_ERR;
goto doreturn;
default:
/*
* this target is no longer candidate
*/
retcode = META_SEARCH_NOT_CANDIDATE;
goto doreturn;
}
/*
* Maps filter
*/
rc = ldap_back_filter_map_rewrite( dc, op->ors_filter,
&mfilter, BACKLDAP_MAP );
switch ( rc ) {
case LDAP_SUCCESS:
break;
case LDAP_COMPARE_FALSE:
default:
/*
* this target is no longer candidate
*/
retcode = META_SEARCH_NOT_CANDIDATE;
goto done;
}
/*
* Maps required attributes
*/
rc = ldap_back_map_attrs( &mt->mt_rwmap.rwm_at,
op->ors_attrs, BACKLDAP_MAP, &mapped_attrs );
if ( rc != LDAP_SUCCESS ) {
/*
* this target is no longer candidate
*/
retcode = META_SEARCH_NOT_CANDIDATE;
goto done;
}
/* should we check return values? */
if ( op->ors_deref != -1 ) {
assert( msc->msc_ld != NULL );
(void)ldap_set_option( msc->msc_ld, LDAP_OPT_DEREF,
( void * )&op->ors_deref );
}
if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
tv.tv_sec = op->ors_tlimit > 0 ? op->ors_tlimit : 1;
tv.tv_usec = 0;
tvp = &tv;
}
retry:;
ctrls = op->o_ctrls;
if ( meta_back_controls_add( op, rs, *mcp, candidate, &ctrls )
!= LDAP_SUCCESS )
{
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
retcode = META_SEARCH_NOT_CANDIDATE;
goto done;
}
/*
* Starts the search
*/
assert( msc->msc_ld != NULL );
rc = ldap_search_ext( msc->msc_ld,
mbase.bv_val, realscope, mfilter.bv_val,
mapped_attrs, op->ors_attrsonly,
ctrls, NULL, tvp, op->ors_slimit,
&candidates[ candidate ].sr_msgid );
switch ( rc ) {
case LDAP_SUCCESS:
retcode = META_SEARCH_CANDIDATE;
break;
case LDAP_SERVER_DOWN:
if ( nretries && meta_back_retry( op, rs, mcp, candidate, LDAP_BACK_DONTSEND ) ) {
nretries = 0;
/* if the identity changed, there might be need to re-authz */
(void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
goto retry;
}
if ( *mcp == NULL ) {
retcode = META_SEARCH_ERR;
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
break;
}
/* fall thru */
default:
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
retcode = META_SEARCH_NOT_CANDIDATE;
}
done:;
(void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
if ( mapped_attrs ) {
free( mapped_attrs );
}
if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
free( mfilter.bv_val );
}
if ( mbase.bv_val != realbase.bv_val ) {
free( mbase.bv_val );
}
doreturn:;
Debug( LDAP_DEBUG_TRACE, "%s <<< meta_back_search_start[%d]=%d\n", op->o_log_prefix, candidate, retcode );
return retcode;
}
int
meta_back_search( Operation *op, SlapReply *rs )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metaconn_t *mc;
struct timeval save_tv = { 0, 0 },
tv;
time_t stoptime = (time_t)(-1),
lastres_time = slap_get_time(),
timeout = 0;
int rc = 0, sres = LDAP_SUCCESS;
char *matched = NULL;
int last = 0, ncandidates = 0,
initial_candidates = 0, candidate_match = 0,
needbind = 0;
ldap_back_send_t sendok = LDAP_BACK_SENDERR;
long i;
dncookie dc;
int is_ok = 0;
void *savepriv;
SlapReply *candidates = NULL;
/*
* controls are set in ldap_back_dobind()
*
* FIXME: in case of values return filter, we might want
* to map attrs and maybe rewrite value
*/
getconn:;
mc = meta_back_getconn( op, rs, NULL, sendok );
if ( !mc ) {
return rs->sr_err;
}
dc.conn = op->o_conn;
dc.rs = rs;
if ( candidates == NULL ) candidates = meta_back_candidates_get( op );
/*
* Inits searches
*/
for ( i = 0; i < mi->mi_ntargets; i++ ) {
/* reset sr_msgid; it is used in most loops
* to check if that target is still to be considered */
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
/* a target is marked as candidate by meta_back_getconn();
* if for any reason (an error, it's over or so) it is
* no longer active, sr_msgid is set to META_MSGID_IGNORE
* but it remains candidate, which means it has been active
* at some point during the operation. This allows to
* use its response code and more to compute the final
* response */
if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
continue;
}
candidates[ i ].sr_matched = NULL;
candidates[ i ].sr_text = NULL;
candidates[ i ].sr_ref = NULL;
candidates[ i ].sr_ctrls = NULL;
/* get largest timeout among candidates */
if ( mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ]
&& mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ] > timeout )
{
timeout = mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ];
}
}
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( !META_IS_CANDIDATE( &candidates[ i ] )
|| candidates[ i ].sr_err != LDAP_SUCCESS )
{
continue;
}
switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
{
case META_SEARCH_NOT_CANDIDATE:
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
break;
case META_SEARCH_NEED_BIND:
++needbind;
/* fallthru */
case META_SEARCH_CONNECTING:
case META_SEARCH_CANDIDATE:
case META_SEARCH_BINDING:
candidates[ i ].sr_type = REP_INTERMEDIATE;
++ncandidates;
break;
case META_SEARCH_ERR:
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
rc = -1;
goto finish;
default:
assert( 0 );
break;
}
}
if ( ncandidates > 0 && needbind == ncandidates ) {
/*
* give up the second time...
*
* NOTE: this should not occur the second time, since a fresh
* connection has ben created; however, targets may also
* need bind because the bind timed out or so.
*/
if ( sendok & LDAP_BACK_BINDING ) {
Debug( LDAP_DEBUG_ANY,
"%s meta_back_search: unable to initialize conn\n",
op->o_log_prefix, 0, 0 );
rs->sr_err = LDAP_UNAVAILABLE;
rs->sr_text = "unable to initialize connection to remote targets";
send_ldap_result( op, rs );
rc = -1;
goto finish;
}
/* FIXME: better create a separate connection? */
sendok |= LDAP_BACK_BINDING;
#ifdef DEBUG_205
Debug( LDAP_DEBUG_ANY, "*** %s drop mc=%p create new connection\n",
op->o_log_prefix, (void *)mc, 0 );
#endif /* DEBUG_205 */
meta_back_release_conn( mi, mc );
mc = NULL;
needbind = 0;
ncandidates = 0;
goto getconn;
}
initial_candidates = ncandidates;
if ( LogTest( LDAP_DEBUG_TRACE ) ) {
char cnd[ SLAP_TEXT_BUFLEN ];
int c;
for ( c = 0; c < mi->mi_ntargets; c++ ) {
if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
cnd[ c ] = '*';
} else {
cnd[ c ] = ' ';
}
}
cnd[ c ] = '\0';
Debug( LDAP_DEBUG_TRACE, "%s meta_back_search: ncandidates=%d "
"cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
}
if ( initial_candidates == 0 ) {
/* NOTE: here we are not sending any matchedDN;
* this is intended, because if the back-meta
* is serving this search request, but no valid
* candidate could be looked up, it means that
* there is a hole in the mapping of the targets
* and thus no knowledge of any remote superior
* is available */
Debug( LDAP_DEBUG_ANY, "%s meta_back_search: "
"base=\"%s\" scope=%d: "
"no candidate could be selected\n",
op->o_log_prefix, op->o_req_dn.bv_val,
op->ors_scope );
/* FIXME: we're sending the first error we encounter;
* maybe we should pick the worst... */
rc = LDAP_NO_SUCH_OBJECT;
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( META_IS_CANDIDATE( &candidates[ i ] )
&& candidates[ i ].sr_err != LDAP_SUCCESS )
{
rc = candidates[ i ].sr_err;
break;
}
}
send_ldap_error( op, rs, rc, NULL );
goto finish;
}
/* We pull apart the ber result, stuff it into a slapd entry, and
* let send_search_entry stuff it back into ber format. Slow & ugly,
* but this is necessary for version matching, and for ACL processing.
*/
if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
stoptime = op->o_time + op->ors_tlimit;
}
/*
* In case there are no candidates, no cycle takes place...
*
* FIXME: we might use a queue, to better balance the load
* among the candidates
*/
for ( rc = 0; ncandidates > 0; ) {
int gotit = 0,
doabandon = 0,
alreadybound = ncandidates;
/* check timeout */
if ( timeout && lastres_time > 0
&& ( slap_get_time() - lastres_time ) > timeout )
{
doabandon = 1;
rs->sr_text = "Operation timed out";
rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
goto finish;
}
/* check time limit */
if ( op->ors_tlimit != SLAP_NO_LIMIT
&& slap_get_time() > stoptime )
{
doabandon = 1;
rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
goto finish;
}
for ( i = 0; i < mi->mi_ntargets; i++ ) {
meta_search_candidate_t retcode = META_SEARCH_UNDEFINED;
metasingleconn_t *msc = &mc->mc_conns[ i ];
LDAPMessage *res = NULL, *msg;
/* if msgid is invalid, don't ldap_result() */
if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
continue;
}
/* if target still needs bind, retry */
if ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND
|| candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
{
/* initiate dobind */
retcode = meta_search_dobind_init( op, rs, &mc, i, candidates );
Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%ld]=%d\n",
op->o_log_prefix, i, retcode );
switch ( retcode ) {
case META_SEARCH_NEED_BIND:
alreadybound--;
/* fallthru */
case META_SEARCH_CONNECTING:
case META_SEARCH_BINDING:
break;
case META_SEARCH_ERR:
candidates[ i ].sr_err = rs->sr_err;
if ( META_BACK_ONERR_STOP( mi ) ) {
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
goto finish;
}
/* fallthru */
case META_SEARCH_NOT_CANDIDATE:
/*
* When no candidates are left,
* the outer cycle finishes
*/
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
assert( ncandidates > 0 );
--ncandidates;
break;
case META_SEARCH_CANDIDATE:
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
{
case META_SEARCH_CANDIDATE:
assert( candidates[ i ].sr_msgid >= 0 );
break;
case META_SEARCH_ERR:
candidates[ i ].sr_err = rs->sr_err;
if ( META_BACK_ONERR_STOP( mi ) ) {
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
goto finish;
}
/* fallthru */
case META_SEARCH_NOT_CANDIDATE:
/* means that meta_back_search_start()
* failed but onerr == continue */
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
assert( ncandidates > 0 );
--ncandidates;
break;
default:
/* impossible */
assert( 0 );
break;
}
break;
default:
/* impossible */
assert( 0 );
break;
}
continue;
}
/* check for abandon */
if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
break;
}
#ifdef DEBUG_205
if ( msc->msc_ld == NULL ) {
char buf[ SLAP_TEXT_BUFLEN ];
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
snprintf( buf, sizeof( buf ),
"%s meta_back_search[%ld] mc=%p msgid=%d%s%s%s\n",
op->o_log_prefix, (long)i, (void *)mc,
candidates[ i ].sr_msgid,
META_IS_BINDING( &candidates[ i ] ) ? " binding" : "",
LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ? " connbinding" : "",
META_BACK_CONN_CREATING( &mc->mc_conns[ i ] ) ? " conncreating" : "" );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
Debug( LDAP_DEBUG_ANY, "!!! %s\n", buf, 0, 0 );
}
#endif /* DEBUG_205 */
/*
* FIXME: handle time limit as well?
* Note that target servers are likely
* to handle it, so at some time we'll
* get a LDAP_TIMELIMIT_EXCEEDED from
* one of them ...
*/
tv = save_tv;
rc = ldap_result( msc->msc_ld, candidates[ i ].sr_msgid,
LDAP_MSG_RECEIVED, &tv, &res );
switch ( rc ) {
case 0:
/* FIXME: res should not need to be freed */
assert( res == NULL );
continue;
case -1:
really_bad:;
/* something REALLY bad happened! */
if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
candidates[ i ].sr_type = REP_RESULT;
if ( meta_back_retry( op, rs, &mc, i, LDAP_BACK_DONTSEND ) ) {
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
{
/* means that failed but onerr == continue */
case META_SEARCH_NOT_CANDIDATE:
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
assert( ncandidates > 0 );
--ncandidates;
candidates[ i ].sr_err = rs->sr_err;
if ( META_BACK_ONERR_STOP( mi ) ) {
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
goto finish;
}
/* fall thru */
case META_SEARCH_CANDIDATE:
/* get back into business... */
continue;
case META_SEARCH_BINDING:
case META_SEARCH_CONNECTING:
case META_SEARCH_NEED_BIND:
case META_SEARCH_UNDEFINED:
assert( 0 );
default:
/* unrecoverable error */
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
rc = rs->sr_err = LDAP_OTHER;
goto finish;
}
}
candidates[ i ].sr_err = rs->sr_err;
if ( META_BACK_ONERR_STOP( mi ) ) {
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
goto finish;
}
}
/*
* When no candidates are left,
* the outer cycle finishes
*/
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
assert( ncandidates > 0 );
--ncandidates;
rs->sr_err = candidates[ i ].sr_err;
continue;
default:
lastres_time = slap_get_time();
/* only touch when activity actually took place... */
if ( mi->mi_idle_timeout != 0 && msc->msc_time < lastres_time ) {
msc->msc_time = lastres_time;
}
break;
}
for ( msg = ldap_first_message( msc->msc_ld, res );
msg != NULL;
msg = ldap_next_message( msc->msc_ld, msg ) )
{
rc = ldap_msgtype( msg );
if ( rc == LDAP_RES_SEARCH_ENTRY ) {
LDAPMessage *e;
if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
/* don't retry any more... */
candidates[ i ].sr_type = REP_RESULT;
}
is_ok++;
e = ldap_first_entry( msc->msc_ld, msg );
savepriv = op->o_private;
op->o_private = (void *)i;
rs->sr_err = meta_send_entry( op, rs, mc, i, e );
switch ( rs->sr_err ) {
case LDAP_SIZELIMIT_EXCEEDED:
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
rs->sr_err = LDAP_SUCCESS;
ldap_msgfree( res );
res = NULL;
goto finish;
case LDAP_UNAVAILABLE:
rs->sr_err = LDAP_OTHER;
ldap_msgfree( res );
res = NULL;
goto finish;
}
op->o_private = savepriv;
/* don't wait any longer... */
gotit = 1;
save_tv.tv_sec = 0;
save_tv.tv_usec = 0;
} else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
char **references = NULL;
int cnt;
if ( META_BACK_TGT_NOREFS( mi->mi_targets[ i ] ) ) {
continue;
}
if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
/* don't retry any more... */
candidates[ i ].sr_type = REP_RESULT;
}
is_ok++;
rc = ldap_parse_reference( msc->msc_ld, msg,
&references, &rs->sr_ctrls, 0 );
if ( rc != LDAP_SUCCESS ) {
continue;
}
if ( references == NULL ) {
continue;
}
#ifdef ENABLE_REWRITE
dc.ctx = "referralDN";
#else /* ! ENABLE_REWRITE */
dc.tofrom = 0;
dc.normalized = 0;
#endif /* ! ENABLE_REWRITE */
/* FIXME: merge all and return at the end */
for ( cnt = 0; references[ cnt ]; cnt++ )
;
rs->sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
for ( cnt = 0; references[ cnt ]; cnt++ ) {
ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
}
BER_BVZERO( &rs->sr_ref[ cnt ] );
( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref );
if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
/* ignore return value by now */
savepriv = op->o_private;
op->o_private = (void *)i;
( void )send_search_reference( op, rs );
op->o_private = savepriv;
ber_bvarray_free( rs->sr_ref );
rs->sr_ref = NULL;
}
/* cleanup */
if ( references ) {
ber_memvfree( (void **)references );
}
if ( rs->sr_ctrls ) {
ldap_controls_free( rs->sr_ctrls );
rs->sr_ctrls = NULL;
}
} else if ( rc == LDAP_RES_SEARCH_RESULT ) {
char buf[ SLAP_TEXT_BUFLEN ];
char **references = NULL;
if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
/* don't retry any more... */
candidates[ i ].sr_type = REP_RESULT;
}
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
/* NOTE: ignores response controls
* (and intermediate response controls
* as well, except for those with search
* references); this may not be correct,
* but if they're not ignored then
* back-meta would need to merge them
* consistently (think of pagedResults...)
*/
/* FIXME: response controls? */
rs->sr_err = ldap_parse_result( msc->msc_ld,
msg,
&candidates[ i ].sr_err,
(char **)&candidates[ i ].sr_matched,
NULL /* (char **)&candidates[ i ].sr_text */ ,
&references,
NULL /* &candidates[ i ].sr_ctrls (unused) */ ,
0 );
if ( rs->sr_err != LDAP_SUCCESS ) {
sres = slap_map_api2result( &candidates[ i ] );
candidates[ i ].sr_type = REP_RESULT;
ldap_msgfree( res );
res = NULL;
goto really_bad;
}
rs->sr_err = candidates[ i ].sr_err;
/* massage matchedDN if need be */
if ( candidates[ i ].sr_matched != NULL ) {
struct berval match, mmatch;
ber_str2bv( candidates[ i ].sr_matched,
0, 0, &match );
candidates[ i ].sr_matched = NULL;
dc.ctx = "matchedDN";
dc.target = mi->mi_targets[ i ];
if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
if ( mmatch.bv_val == match.bv_val ) {
candidates[ i ].sr_matched
= ch_strdup( mmatch.bv_val );
} else {
candidates[ i ].sr_matched = mmatch.bv_val;
}
candidate_match++;
}
ldap_memfree( match.bv_val );
}
/* add references to array */
/* RFC 4511: referrals can only appear
* if result code is LDAP_REFERRAL */
if ( references != NULL
&& references[ 0 ] != NULL
&& references[ 0 ][ 0 ] != '\0' )
{
if ( rs->sr_err != LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_ANY,
"%s meta_back_search[%ld]: "
"got referrals with err=%d\n",
op->o_log_prefix,
i, rs->sr_err );
} else {
BerVarray sr_ref;
int cnt;
for ( cnt = 0; references[ cnt ]; cnt++ )
;
sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
for ( cnt = 0; references[ cnt ]; cnt++ ) {
ber_str2bv( references[ cnt ], 0, 1, &sr_ref[ cnt ] );
}
BER_BVZERO( &sr_ref[ cnt ] );
( void )ldap_back_referral_result_rewrite( &dc, sr_ref );
if ( rs->sr_v2ref == NULL ) {
rs->sr_v2ref = sr_ref;
} else {
for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
ber_bvarray_add( &rs->sr_v2ref, &sr_ref[ cnt ] );
}
ber_memfree( sr_ref );
}
}
} else if ( rs->sr_err == LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_ANY,
"%s meta_back_search[%ld]: "
"got err=%d with null "
"or empty referrals\n",
op->o_log_prefix,
i, rs->sr_err );
rs->sr_err = LDAP_NO_SUCH_OBJECT;
}
/* cleanup */
ber_memvfree( (void **)references );
sres = slap_map_api2result( rs );
if ( LogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
snprintf( buf, sizeof( buf ),
"%s meta_back_search[%ld] "
"match=\"%s\" err=%ld",
op->o_log_prefix, i,
candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
(long) candidates[ i ].sr_err );
if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
} else {
Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
}
}
switch ( sres ) {
case LDAP_NO_SUCH_OBJECT:
/* is_ok is touched any time a valid
* (even intermediate) result is
* returned; as a consequence, if
* a candidate returns noSuchObject
* it is ignored and the candidate
* is simply demoted. */
if ( is_ok ) {
sres = LDAP_SUCCESS;
}
break;
case LDAP_SUCCESS:
case LDAP_REFERRAL:
is_ok++;
break;
case LDAP_SIZELIMIT_EXCEEDED:
/* if a target returned sizelimitExceeded
* and the entry count is equal to the
* proxy's limit, the target would have
* returned more, and the error must be
* propagated to the client; otherwise,
* the target enforced a limit lower
* than what requested by the proxy;
* ignore it */
candidates[ i ].sr_err = rs->sr_err;
if ( rs->sr_nentries == op->ors_slimit
|| META_BACK_ONERR_STOP( mi ) )
{
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
ldap_msgfree( res );
res = NULL;
goto finish;
}
break;
default:
candidates[ i ].sr_err = rs->sr_err;
if ( META_BACK_ONERR_STOP( mi ) ) {
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
ldap_msgfree( res );
res = NULL;
goto finish;
}
break;
}
last = i;
rc = 0;
/*
* When no candidates are left,
* the outer cycle finishes
*/
assert( ncandidates > 0 );
--ncandidates;
} else if ( rc == LDAP_RES_BIND ) {
meta_search_candidate_t retcode;
retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
if ( retcode == META_SEARCH_CANDIDATE ) {
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates );
}
switch ( retcode ) {
case META_SEARCH_CANDIDATE:
break;
/* means that failed but onerr == continue */
case META_SEARCH_NOT_CANDIDATE:
case META_SEARCH_ERR:
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
assert( ncandidates > 0 );
--ncandidates;
candidates[ i ].sr_err = rs->sr_err;
if ( META_BACK_ONERR_STOP( mi ) ) {
savepriv = op->o_private;
op->o_private = (void *)i;
send_ldap_result( op, rs );
op->o_private = savepriv;
ldap_msgfree( res );
res = NULL;
goto finish;
}
goto free_message;
default:
assert( 0 );
break;
}
} else {
assert( 0 );
ldap_msgfree( res );
res = NULL;
goto really_bad;
}
}
free_message:;
ldap_msgfree( res );
res = NULL;
}
/* check for abandon */
if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( candidates[ i ].sr_msgid >= 0
|| candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
{
if ( META_IS_BINDING( &candidates[ i ] )
|| candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
{
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
|| candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
{
/* if still binding, destroy */
#ifdef DEBUG_205
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf), "%s meta_back_search(abandon) "
"ldap_unbind_ext[%ld] mc=%p ld=%p",
op->o_log_prefix, i, (void *)mc,
(void *)mc->mc_conns[i].msc_ld );
Debug( LDAP_DEBUG_ANY, "### %s\n", buf, 0, 0 );
#endif /* DEBUG_205 */
meta_clear_one_candidate( op, mc, i );
}
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
META_BINDING_CLEAR( &candidates[ i ] );
} else {
(void)meta_back_cancel( mc, op, rs,
candidates[ i ].sr_msgid, i,
LDAP_BACK_DONTSEND );
}
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
assert( ncandidates > 0 );
--ncandidates;
}
}
if ( op->o_abandon ) {
rc = SLAPD_ABANDON;
}
/* let send_ldap_result play cleanup handlers (ITS#4645) */
break;
}
/* if no entry was found during this loop,
* set a minimal timeout */
if ( ncandidates > 0 && gotit == 0 ) {
if ( save_tv.tv_sec == 0 && save_tv.tv_usec == 0 ) {
save_tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;
/* arbitrarily limit to something between 1 and 2 minutes */
} else if ( ( stoptime == -1 && save_tv.tv_sec < 60 )
|| save_tv.tv_sec < ( stoptime - slap_get_time() ) / ( 2 * ncandidates ) )
{
/* double the timeout */
lutil_timermul( &save_tv, 2, &save_tv );
}
if ( alreadybound == 0 ) {
tv = save_tv;
(void)select( 0, NULL, NULL, NULL, &tv );
} else {
ldap_pvt_thread_yield();
}
}
}
if ( rc == -1 ) {
/*
* FIXME: need a better strategy to handle errors
*/
if ( mc ) {
rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
-1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
LDAP_BACK_SENDERR );
} else {
rc = rs->sr_err;
}
goto finish;
}
/*
* Rewrite the matched portion of the search base, if required
*
* FIXME: only the last one gets caught!
*/
savepriv = op->o_private;
op->o_private = (void *)(long)mi->mi_ntargets;
if ( candidate_match > 0 ) {
struct berval pmatched = BER_BVNULL;
/* we use the first one */
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( META_IS_CANDIDATE( &candidates[ i ] )
&& candidates[ i ].sr_matched != NULL )
{
struct berval bv, pbv;
int rc;
/* if we got success, and this target
* returned noSuchObject, and its suffix
* is a superior of the searchBase,
* ignore the matchedDN */
if ( sres == LDAP_SUCCESS
&& candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
&& op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
{
free( (char *)candidates[ i ].sr_matched );
candidates[ i ].sr_matched = NULL;
continue;
}
ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );
if ( rc == LDAP_SUCCESS ) {
/* NOTE: if they all are superiors
* of the baseDN, the shorter is also
* superior of the longer... */
if ( pbv.bv_len > pmatched.bv_len ) {
if ( !BER_BVISNULL( &pmatched ) ) {
op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
}
pmatched = pbv;
op->o_private = (void *)i;
} else {
op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
}
}
if ( candidates[ i ].sr_matched != NULL ) {
free( (char *)candidates[ i ].sr_matched );
candidates[ i ].sr_matched = NULL;
}
}
}
if ( !BER_BVISNULL( &pmatched ) ) {
matched = pmatched.bv_val;
}
} else if ( sres == LDAP_NO_SUCH_OBJECT ) {
matched = op->o_bd->be_suffix[ 0 ].bv_val;
}
/*
* In case we returned at least one entry, we return LDAP_SUCCESS
* otherwise, the latter error code we got
*/
if ( sres == LDAP_SUCCESS ) {
if ( rs->sr_v2ref ) {
sres = LDAP_REFERRAL;
}
if ( META_BACK_ONERR_REPORT( mi ) ) {
/*
* Report errors, if any
*
* FIXME: we should handle error codes and return the more
* important/reasonable
*/
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
continue;
}
if ( candidates[ i ].sr_err != LDAP_SUCCESS
&& candidates[ i ].sr_err != LDAP_NO_SUCH_OBJECT )
{
sres = candidates[ i ].sr_err;
break;
}
}
}
}
rs->sr_err = sres;
rs->sr_matched = matched;
rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
send_ldap_result( op, rs );
op->o_private = savepriv;
rs->sr_matched = NULL;
rs->sr_ref = NULL;
finish:;
if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
op->o_tmpfree( matched, op->o_tmpmemctx );
}
if ( rs->sr_v2ref ) {
ber_bvarray_free( rs->sr_v2ref );
}
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
continue;
}
if ( mc ) {
if ( META_IS_BINDING( &candidates[ i ] )
|| candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
{
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
|| candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
{
assert( candidates[ i ].sr_msgid >= 0
|| candidates[ i ].sr_msgid == META_MSGID_CONNECTING );
assert( mc->mc_conns[ i ].msc_ld != NULL );
#ifdef DEBUG_205
Debug( LDAP_DEBUG_ANY, "### %s meta_back_search(cleanup) "
"ldap_unbind_ext[%ld] ld=%p\n",
op->o_log_prefix, i, (void *)mc->mc_conns[i].msc_ld );
#endif /* DEBUG_205 */
/* if still binding, destroy */
meta_clear_one_candidate( op, mc, i );
}
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
META_BINDING_CLEAR( &candidates[ i ] );
} else if ( candidates[ i ].sr_msgid >= 0 ) {
(void)meta_back_cancel( mc, op, rs,
candidates[ i ].sr_msgid, i,
LDAP_BACK_DONTSEND );
}
}
if ( candidates[ i ].sr_matched ) {
free( (char *)candidates[ i ].sr_matched );
candidates[ i ].sr_matched = NULL;
}
if ( candidates[ i ].sr_text ) {
ldap_memfree( (char *)candidates[ i ].sr_text );
candidates[ i ].sr_text = NULL;
}
if ( candidates[ i ].sr_ref ) {
ber_bvarray_free( candidates[ i ].sr_ref );
candidates[ i ].sr_ref = NULL;
}
if ( candidates[ i ].sr_ctrls ) {
ldap_controls_free( candidates[ i ].sr_ctrls );
candidates[ i ].sr_ctrls = NULL;
}
if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
meta_back_quarantine( op, &candidates[ i ], i );
}
/* only in case of timelimit exceeded, if the timelimit exceeded because
* one contacted target never responded, invalidate the connection
* NOTE: should we quarantine the target as well? right now, the connection
* is invalidated; the next time it will be recreated and the target
* will be quarantined if it cannot be contacted */
if ( mi->mi_idle_timeout != 0
&& rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
&& op->o_time > mc->mc_conns[ i ].msc_time )
{
/* don't let anyone else use this expired connection */
LDAP_BACK_CONN_TAINTED_SET( mc );
}
}
if ( mc ) {
meta_back_release_conn( mi, mc );
}
return rs->sr_err;
}
static int
meta_send_entry(
Operation *op,
SlapReply *rs,
metaconn_t *mc,
int target,
LDAPMessage *e )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
struct berval a, mapped;
int check_duplicate_attrs = 0;
Entry ent = { 0 };
BerElement ber = *e->lm_ber;
Attribute *attr, **attrp;
struct berval bdn,
dn = BER_BVNULL;
const char *text;
dncookie dc;
int rc;
if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
return LDAP_DECODING_ERROR;
}
/*
* Rewrite the dn of the result, if needed
*/
dc.target = mi->mi_targets[ target ];
dc.conn = op->o_conn;
dc.rs = rs;
dc.ctx = "searchResult";
rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
if ( rs->sr_err != LDAP_SUCCESS) {
return rs->sr_err;
}
/*
* Note: this may fail if the target host(s) schema differs
* from the one known to the meta, and a DN with unknown
* attributes is returned.
*
* FIXME: should we log anything, or delegate to dnNormalize?
*/
rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
op->o_tmpmemctx );
if ( dn.bv_val != bdn.bv_val ) {
free( dn.bv_val );
}
BER_BVZERO( &dn );
if ( rc != LDAP_SUCCESS ) {
return LDAP_INVALID_DN_SYNTAX;
}
/*
* cache dn
*/
if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
( void )meta_dncache_update_entry( &mi->mi_cache,
&ent.e_nname, target );
}
attrp = &ent.e_attrs;
dc.ctx = "searchAttrDN";
while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
int last = 0;
slap_syntax_validate_func *validate;
slap_syntax_transform_func *pretty;
ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at,
&a, &mapped, BACKLDAP_REMAP );
if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
( void )ber_scanf( &ber, "x" /* [W] */ );
continue;
}
if ( mapped.bv_val != a.bv_val ) {
/* will need to check for duplicate attrs */
check_duplicate_attrs++;
}
attr = attr_alloc( NULL );
if ( attr == NULL ) {
continue;
}
if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
!= LDAP_SUCCESS) {
if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
SLAP_AD_PROXIED ) != LDAP_SUCCESS )
{
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf ),
"%s meta_send_entry(\"%s\"): "
"slap_bv2undef_ad(%s): %s\n",
op->o_log_prefix, ent.e_name.bv_val,
mapped.bv_val, text );
Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
attr_free( attr );
continue;
}
}
/* no subschemaSubentry */
if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
|| attr->a_desc == slap_schema.si_ad_entryDN )
{
/*
* We eat target's subschemaSubentry because
* a search for this value is likely not
* to resolve to the appropriate backend;
* later, the local subschemaSubentry is
* added.
*
* We also eat entryDN because the frontend
* will reattach it without checking if already
* present...
*/
( void )ber_scanf( &ber, "x" /* [W] */ );
attr_free(attr);
continue;
}
if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
|| attr->a_vals == NULL )
{
attr->a_vals = (struct berval *)&slap_dummy_bv;
} else {
for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
;
}
attr->a_numvals = last;
validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
if ( !validate && !pretty ) {
attr_free( attr );
goto next_attr;
}
if ( attr->a_desc == slap_schema.si_ad_objectClass
|| attr->a_desc == slap_schema.si_ad_structuralObjectClass )
{
struct berval *bv;
for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
bv, &mapped, BACKLDAP_REMAP );
if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
remove_oc:;
free( bv->bv_val );
BER_BVZERO( bv );
if ( --last < 0 ) {
break;
}
*bv = attr->a_vals[ last ];
BER_BVZERO( &attr->a_vals[ last ] );
bv--;
} else if ( mapped.bv_val != bv->bv_val ) {
int i;
for ( i = 0; !BER_BVISNULL( &attr->a_vals[ i ] ); i++ ) {
if ( &attr->a_vals[ i ] == bv ) {
continue;
}
if ( ber_bvstrcasecmp( &mapped, &attr->a_vals[ i ] ) == 0 ) {
break;
}
}
if ( !BER_BVISNULL( &attr->a_vals[ i ] ) ) {
goto remove_oc;
}
ber_bvreplace( bv, &mapped );
}
}
/*
* It is necessary to try to rewrite attributes with
* dn syntax because they might be used in ACLs as
* members of groups; since ACLs are applied to the
* rewritten stuff, no dn-based subecj clause could
* be used at the ldap backend side (see
* http://www.OpenLDAP.org/faq/data/cache/452.html)
* The problem can be overcome by moving the dn-based
* ACLs to the target directory server, and letting
* everything pass thru the ldap backend.
*/
} else {
int i;
if ( attr->a_desc->ad_type->sat_syntax ==
slap_schema.si_syn_distinguishedName )
{
ldap_dnattr_result_rewrite( &dc, attr->a_vals );
} else if ( attr->a_desc == slap_schema.si_ad_ref ) {
ldap_back_referral_result_rewrite( &dc, attr->a_vals );
}
for ( i = 0; i < last; i++ ) {
struct berval pval;
int rc;
if ( pretty ) {
rc = pretty( attr->a_desc->ad_type->sat_syntax,
&attr->a_vals[i], &pval, NULL );
} else {
rc = validate( attr->a_desc->ad_type->sat_syntax,
&attr->a_vals[i] );
}
if ( rc ) {
LBER_FREE( attr->a_vals[i].bv_val );
if ( --last == i ) {
BER_BVZERO( &attr->a_vals[ i ] );
break;
}
attr->a_vals[i] = attr->a_vals[last];
BER_BVZERO( &attr->a_vals[last] );
i--;
continue;
}
if ( pretty ) {
LBER_FREE( attr->a_vals[i].bv_val );
attr->a_vals[i] = pval;
}
}
if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
attr_free( attr );
goto next_attr;
}
}
if ( last && attr->a_desc->ad_type->sat_equality &&
attr->a_desc->ad_type->sat_equality->smr_normalize )
{
int i;
attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
for ( i = 0; i<last; i++ ) {
attr->a_desc->ad_type->sat_equality->smr_normalize(
SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
attr->a_desc->ad_type->sat_syntax,
attr->a_desc->ad_type->sat_equality,
&attr->a_vals[i], &attr->a_nvals[i],
NULL );
}
BER_BVZERO( &attr->a_nvals[i] );
} else {
attr->a_nvals = attr->a_vals;
}
*attrp = attr;
attrp = &attr->a_next;
next_attr:;
}
/* only check if some mapping occurred */
if ( check_duplicate_attrs ) {
Attribute **ap;
for ( ap = &ent.e_attrs; *ap != NULL; ap = &(*ap)->a_next ) {
Attribute **tap;
for ( tap = &(*ap)->a_next; *tap != NULL; ) {
if ( (*tap)->a_desc == (*ap)->a_desc ) {
Entry e = { 0 };
Modification mod = { 0 };
const char *text = NULL;
char textbuf[ SLAP_TEXT_BUFLEN ];
Attribute *next = (*tap)->a_next;
BER_BVSTR( &e.e_name, "" );
BER_BVSTR( &e.e_nname, "" );
e.e_attrs = *ap;
mod.sm_op = LDAP_MOD_ADD;
mod.sm_desc = (*ap)->a_desc;
mod.sm_type = mod.sm_desc->ad_cname;
mod.sm_numvals = (*ap)->a_numvals;
mod.sm_values = (*tap)->a_vals;
if ( (*tap)->a_nvals != (*tap)->a_vals ) {
mod.sm_nvalues = (*tap)->a_nvals;
}
(void)modify_add_values( &e, &mod,
/* permissive */ 1,
&text, textbuf, sizeof( textbuf ) );
/* should not insert new attrs! */
assert( e.e_attrs == *ap );
attr_free( *tap );
*tap = next;
} else {
tap = &(*tap)->a_next;
}
}
}
}
ldap_get_entry_controls( mc->mc_conns[target].msc_ld,
e, &rs->sr_ctrls );
rs->sr_entry = &ent;
rs->sr_attrs = op->ors_attrs;
rs->sr_operational_attrs = NULL;
rs->sr_flags = 0;
rs->sr_err = LDAP_SUCCESS;
rc = send_search_entry( op, rs );
switch ( rc ) {
case LDAP_UNAVAILABLE:
rc = LDAP_OTHER;
break;
}
rs->sr_entry = NULL;
rs->sr_attrs = NULL;
if ( rs->sr_ctrls != NULL ) {
ldap_controls_free( rs->sr_ctrls );
rs->sr_ctrls = NULL;
}
if ( !BER_BVISNULL( &ent.e_name ) ) {
free( ent.e_name.bv_val );
BER_BVZERO( &ent.e_name );
}
if ( !BER_BVISNULL( &ent.e_nname ) ) {
free( ent.e_nname.bv_val );
BER_BVZERO( &ent.e_nname );
}
entry_clean( &ent );
return rc;
}
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