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openldap/servers/slapd/backend.c

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/* backend.c - routines for dealing with back-end databases */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2004 The OpenLDAP Foundation.
* 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>.
*/
/* Portions Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include <sys/stat.h>
#include "slap.h"
#include "lutil.h"
#include "lber_pvt.h"
#include "ldap_rq.h"
#ifdef LDAP_SLAPI
#include "slapi/slapi.h"
static void init_group_pblock( Operation *op, Entry *target,
Entry *e, struct berval *op_ndn, AttributeDescription *group_at );
static int call_group_preop_plugins( Operation *op );
static void call_group_postop_plugins( Operation *op );
#endif /* LDAP_SLAPI */
/*
* If a module is configured as dynamic, its header should not
* get included into slapd. While this is a general rule and does
* not have much of an effect in UNIX, this rule should be adhered
* to for Windows, where dynamic object code should not be implicitly
* imported into slapd without appropriate __declspec(dllimport) directives.
*/
#if SLAPD_BDB == SLAPD_MOD_STATIC
#include "back-bdb/external.h"
#endif
#if SLAPD_DNSSRV == SLAPD_MOD_STATIC
#include "back-dnssrv/external.h"
#endif
#if SLAPD_HDB == SLAPD_MOD_STATIC
#include "back-hdb/external.h"
#endif
#if SLAPD_LDAP == SLAPD_MOD_STATIC
#include "back-ldap/external.h"
#endif
#if SLAPD_LDBM == SLAPD_MOD_STATIC
#include "back-ldbm/external.h"
#endif
#if SLAPD_META == SLAPD_MOD_STATIC
#include "back-meta/external.h"
#endif
#if SLAPD_MONITOR == SLAPD_MOD_STATIC
#include "back-monitor/external.h"
#endif
#if SLAPD_NULL == SLAPD_MOD_STATIC
#include "back-null/external.h"
#endif
#if SLAPD_PASSWD == SLAPD_MOD_STATIC
#include "back-passwd/external.h"
#endif
#if SLAPD_PERL == SLAPD_MOD_STATIC
#include "back-perl/external.h"
#endif
#if SLAPD_RELAY == SLAPD_MOD_STATIC
#include "back-relay/external.h"
#endif
#if SLAPD_SHELL == SLAPD_MOD_STATIC
#include "back-shell/external.h"
#endif
#if SLAPD_TCL == SLAPD_MOD_STATIC
#include "back-tcl/external.h"
#endif
#if SLAPD_SQL == SLAPD_MOD_STATIC
#include "back-sql/external.h"
#endif
#if SLAPD_PRIVATE == SLAPD_MOD_STATIC
#include "private/external.h"
#endif
static BackendInfo binfo[] = {
#if SLAPD_BDB == SLAPD_MOD_STATIC
{"bdb", bdb_initialize},
#endif
#if SLAPD_DNSSRV == SLAPD_MOD_STATIC
{"dnssrv", dnssrv_back_initialize},
#endif
#if SLAPD_HDB == SLAPD_MOD_STATIC
{"hdb", hdb_initialize},
#endif
#if SLAPD_LDAP == SLAPD_MOD_STATIC
{"ldap", ldap_back_initialize},
#endif
#if SLAPD_LDBM == SLAPD_MOD_STATIC
{"ldbm", ldbm_back_initialize},
#endif
#if SLAPD_META == SLAPD_MOD_STATIC
{"meta", meta_back_initialize},
#endif
#if SLAPD_MONITOR == SLAPD_MOD_STATIC
{"monitor", monitor_back_initialize},
#endif
#if SLAPD_NULL == SLAPD_MOD_STATIC
{"null", null_back_initialize},
#endif
#if SLAPD_PASSWD == SLAPD_MOD_STATIC
{"passwd", passwd_back_initialize},
#endif
#if SLAPD_PERL == SLAPD_MOD_STATIC
{"perl", perl_back_initialize},
#endif
#if SLAPD_RELAY == SLAPD_MOD_STATIC
{"relay", relay_back_initialize},
#endif
#if SLAPD_SHELL == SLAPD_MOD_STATIC
{"shell", shell_back_initialize},
#endif
#if SLAPD_TCL == SLAPD_MOD_STATIC
{"tcl", tcl_back_initialize},
#endif
#if SLAPD_SQL == SLAPD_MOD_STATIC
{"sql", backsql_initialize},
#endif
/* for any private backend */
#if SLAPD_PRIVATE == SLAPD_MOD_STATIC
{"private", private_back_initialize},
#endif
{NULL}
};
int nBackendInfo = 0;
BackendInfo *backendInfo = NULL;
int nBackendDB = 0;
BackendDB *backendDB = NULL;
ldap_pvt_thread_pool_t syncrepl_pool;
int syncrepl_pool_max = SLAP_MAX_SYNCREPL_THREADS;
int backend_init(void)
{
int rc = -1;
ldap_pvt_thread_pool_init( &syncrepl_pool, syncrepl_pool_max, 0 );
if((nBackendInfo != 0) || (backendInfo != NULL)) {
/* already initialized */
Debug( LDAP_DEBUG_ANY,
"backend_init: already initialized.\n", 0, 0, 0 );
return -1;
}
for( ;
binfo[nBackendInfo].bi_type != NULL;
nBackendInfo++ )
{
assert( binfo[nBackendInfo].bi_init );
rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_init: initialized for type \"%s\"\n",
binfo[nBackendInfo].bi_type, 0, 0 );
/* destroy those we've already inited */
for( nBackendInfo--;
nBackendInfo >= 0 ;
nBackendInfo-- )
{
if ( binfo[nBackendInfo].bi_destroy ) {
binfo[nBackendInfo].bi_destroy(
&binfo[nBackendInfo] );
}
}
return rc;
}
}
if ( nBackendInfo > 0) {
backendInfo = binfo;
return 0;
}
#ifdef SLAPD_MODULES
return 0;
#else
Debug( LDAP_DEBUG_ANY,
"backend_init: failed\n",
0, 0, 0 );
return rc;
#endif /* SLAPD_MODULES */
}
int backend_add(BackendInfo *aBackendInfo)
{
int rc = 0;
if ( aBackendInfo->bi_init == NULL ) {
Debug( LDAP_DEBUG_ANY, "backend_add: "
"backend type \"%s\" does not have the (mandatory)init function\n",
aBackendInfo->bi_type, 0, 0 );
return -1;
}
if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_add: initialization for type \"%s\" failed\n",
aBackendInfo->bi_type, 0, 0 );
return rc;
}
/* now add the backend type to the Backend Info List */
{
BackendInfo *newBackendInfo = 0;
/* if backendInfo == binfo no deallocation of old backendInfo */
if (backendInfo == binfo) {
newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
AC_MEMCPY(newBackendInfo, backendInfo,
sizeof(BackendInfo) * nBackendInfo);
} else {
newBackendInfo = ch_realloc(backendInfo,
sizeof(BackendInfo) * (nBackendInfo + 1));
}
AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
sizeof(BackendInfo));
backendInfo = newBackendInfo;
nBackendInfo++;
return 0;
}
}
/* startup a specific backend database */
int backend_startup_one(Backend *be)
{
int rc = 0;
assert(be);
be->be_pending_csn_list = (struct be_pcl *)
ch_calloc( 1, sizeof( struct be_pcl ));
build_new_dn( &be->be_context_csn, be->be_nsuffix,
(struct berval *)&slap_ldapsync_cn_bv, NULL );
LDAP_TAILQ_INIT( be->be_pending_csn_list );
Debug( LDAP_DEBUG_TRACE,
"backend_startup: starting \"%s\"\n",
be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
0, 0 );
if ( be->bd_info->bi_db_open ) {
rc = be->bd_info->bi_db_open( be );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_open failed! (%d)\n",
rc, 0, 0 );
}
}
return rc;
}
int backend_startup(Backend *be)
{
int i;
int rc = 0;
if( ! ( nBackendDB > 0 ) ) {
/* no databases */
Debug( LDAP_DEBUG_ANY,
"backend_startup: %d databases to startup.\n",
nBackendDB, 0, 0 );
return 1;
}
if(be != NULL) {
if ( be->bd_info->bi_open ) {
rc = be->bd_info->bi_open( be->bd_info );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_open failed!\n",
0, 0, 0 );
return rc;
}
}
return backend_startup_one( be );
}
/* open frontend, if required */
if ( frontendDB->bd_info->bi_db_open ) {
rc = frontendDB->bd_info->bi_db_open( frontendDB );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_open(frontend) failed! (%d)\n",
rc, 0, 0 );
return rc;
}
}
/* open each backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( backendInfo[i].bi_nDB == 0) {
/* no database of this type, don't open */
continue;
}
if( backendInfo[i].bi_open ) {
rc = backendInfo[i].bi_open(
&backendInfo[i] );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_open %d failed!\n",
i, 0, 0 );
return rc;
}
}
}
ldap_pvt_thread_mutex_init( &syncrepl_rq.rq_mutex );
LDAP_STAILQ_INIT( &syncrepl_rq.task_list );
LDAP_STAILQ_INIT( &syncrepl_rq.run_list );
/* open each backend database */
for( i = 0; i < nBackendDB; i++ ) {
if ( backendDB[i].be_suffix == NULL ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: warning, database %d (%s) "
"has no suffix\n",
i, backendDB[i].bd_info->bi_type, 0 );
}
/* append global access controls */
acl_append( &backendDB[i].be_acl, frontendDB->be_acl );
rc = backend_startup_one( &backendDB[i] );
if ( rc ) return rc;
if ( !LDAP_STAILQ_EMPTY( &backendDB[i].be_syncinfo )) {
syncinfo_t *si;
if ( !( backendDB[i].be_search && backendDB[i].be_add &&
backendDB[i].be_modify && backendDB[i].be_delete )) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: database(%d) does not support "
"operations required for syncrepl", i, 0, 0 );
continue;
}
LDAP_STAILQ_FOREACH( si, &backendDB[i].be_syncinfo, si_next ) {
si->si_be = &backendDB[i];
init_syncrepl( si );
ldap_pvt_thread_mutex_lock( &syncrepl_rq.rq_mutex );
ldap_pvt_runqueue_insert( &syncrepl_rq,
si->si_interval, do_syncrepl, (void *) si );
ldap_pvt_thread_mutex_unlock( &syncrepl_rq.rq_mutex );
}
}
}
return rc;
}
int backend_num( Backend *be )
{
int i;
if( be == NULL ) return -1;
for( i = 0; i < nBackendDB; i++ ) {
if( be == &backendDB[i] ) return i;
}
return -1;
}
int backend_shutdown( Backend *be )
{
int i;
int rc = 0;
if( be != NULL ) {
/* shutdown a specific backend database */
if ( be->bd_info->bi_nDB == 0 ) {
/* no database of this type, we never opened it */
return 0;
}
if ( be->bd_info->bi_db_close ) {
be->bd_info->bi_db_close( be );
}
if( be->bd_info->bi_close ) {
be->bd_info->bi_close( be->bd_info );
}
return 0;
}
/* close each backend database */
for( i = 0; i < nBackendDB; i++ ) {
if ( backendDB[i].bd_info->bi_db_close ) {
backendDB[i].bd_info->bi_db_close(
&backendDB[i] );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_close: bi_db_close %s failed!\n",
backendDB[i].be_type, 0, 0 );
}
}
/* close each backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( backendInfo[i].bi_nDB == 0 ) {
/* no database of this type */
continue;
}
if( backendInfo[i].bi_close ) {
backendInfo[i].bi_close(
&backendInfo[i] );
}
}
/* close frontend, if required */
if ( frontendDB->bd_info->bi_db_close ) {
rc = frontendDB->bd_info->bi_db_close ( frontendDB );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_close(frontend) failed! (%d)\n",
rc, 0, 0 );
}
}
return 0;
}
int backend_destroy(void)
{
int i;
BackendDB *bd;
syncinfo_t *si_entry;
struct slap_csn_entry *csne;
ldap_pvt_thread_pool_destroy( &syncrepl_pool, 1 );
/* destroy each backend database */
for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
while ( !LDAP_STAILQ_EMPTY( &bd->be_syncinfo )) {
si_entry = LDAP_STAILQ_FIRST( &bd->be_syncinfo );
LDAP_STAILQ_REMOVE_HEAD( &bd->be_syncinfo, si_next );
syncinfo_free( si_entry );
}
if ( bd->be_pending_csn_list ) {
csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
while ( csne ) {
struct slap_csn_entry *tmp_csne = csne;
LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
ch_free( csne->ce_csn->bv_val );
ch_free( csne->ce_csn );
csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
ch_free( tmp_csne );
}
}
if ( bd->bd_info->bi_db_destroy ) {
bd->bd_info->bi_db_destroy( bd );
}
ber_bvarray_free( bd->be_suffix );
ber_bvarray_free( bd->be_nsuffix );
if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
if ( bd->be_context_csn.bv_val ) free( bd->be_context_csn.bv_val );
acl_destroy( bd->be_acl, frontendDB->be_acl );
}
free( backendDB );
/* destroy each backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( backendInfo[i].bi_destroy ) {
backendInfo[i].bi_destroy(
&backendInfo[i] );
}
}
#ifdef SLAPD_MODULES
if (backendInfo != binfo) {
free(backendInfo);
}
#endif /* SLAPD_MODULES */
nBackendInfo = 0;
backendInfo = NULL;
/* destroy frontend database */
bd = frontendDB;
if ( bd->bd_info->bi_db_destroy ) {
bd->bd_info->bi_db_destroy( bd );
}
ber_bvarray_free( bd->be_suffix );
ber_bvarray_free( bd->be_nsuffix );
if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
acl_destroy( bd->be_acl, frontendDB->be_acl );
return 0;
}
BackendInfo* backend_info(const char *type)
{
int i;
/* search for the backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
return &backendInfo[i];
}
}
return NULL;
}
BackendDB *
backend_db_init(
const char *type )
{
Backend *be;
BackendInfo *bi = backend_info(type);
int rc = 0;
if( bi == NULL ) {
fprintf( stderr, "Unrecognized database type (%s)\n", type );
return NULL;
}
be = backendDB;
backendDB = (BackendDB *) ch_realloc(
(char *) backendDB,
(nBackendDB + 1) * sizeof(Backend) );
memset( &backendDB[nbackends], '\0', sizeof(Backend) );
/* did realloc move our table? if so, fix up dependent pointers */
if ( be != backendDB ) {
int i;
for ( i=0, be=backendDB; i<nbackends; i++, be++ ) {
be->be_pcl_mutexp = &be->be_pcl_mutex;
}
}
be = &backends[nbackends++];
be->bd_info = bi;
be->be_def_limit = frontendDB->be_def_limit;
be->be_dfltaccess = frontendDB->be_dfltaccess;
be->be_restrictops = frontendDB->be_restrictops;
be->be_requires = frontendDB->be_requires;
be->be_ssf_set = frontendDB->be_ssf_set;
be->be_context_csn.bv_len = 0;
be->be_context_csn.bv_val = NULL;
be->be_pcl_mutexp = &be->be_pcl_mutex;
ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
LDAP_STAILQ_INIT( &be->be_syncinfo );
/* assign a default depth limit for alias deref */
be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
if(bi->bi_db_init) {
rc = bi->bi_db_init( be );
}
if(rc != 0) {
fprintf( stderr, "database init failed (%s)\n", type );
nbackends--;
return NULL;
}
bi->bi_nDB++;
return( be );
}
void
be_db_close( void )
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].bd_info->bi_db_close ) {
(*backends[i].bd_info->bi_db_close)( &backends[i] );
}
}
if ( frontendDB->bd_info->bi_db_close ) {
(*frontendDB->bd_info->bi_db_close)( frontendDB );
}
}
Backend *
select_backend(
struct berval * dn,
int manageDSAit,
int noSubs )
{
int i, j;
ber_len_t len, dnlen = dn->bv_len;
Backend *be = NULL;
for ( i = 0; i < nbackends; i++ ) {
for ( j = 0; backends[i].be_nsuffix != NULL &&
backends[i].be_nsuffix[j].bv_val != NULL; j++ )
{
if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
&& noSubs )
{
continue;
}
len = backends[i].be_nsuffix[j].bv_len;
if ( len > dnlen ) {
/* suffix is longer than DN */
continue;
}
/*
* input DN is normalized, so the separator check
* need not look at escaping
*/
if ( len && len < dnlen &&
!DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
{
continue;
}
if ( strcmp( backends[i].be_nsuffix[j].bv_val,
&dn->bv_val[dnlen-len] ) == 0 )
{
if( be == NULL ) {
be = &backends[i];
if( manageDSAit && len == dnlen &&
!SLAP_GLUE_SUBORDINATE( be ) ) {
continue;
}
} else {
be = &backends[i];
}
return be;
}
}
}
return be;
}
int
be_issuffix(
Backend *be,
struct berval *bvsuffix )
{
int i;
for ( i = 0;
be->be_nsuffix != NULL && be->be_nsuffix[i].bv_val != NULL;
i++ )
{
if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
return( 1 );
}
}
return( 0 );
}
int
be_isroot_dn( Backend *be, struct berval *ndn )
{
if ( !ndn->bv_len ) {
return( 0 );
}
if ( !be->be_rootndn.bv_len ) {
return( 0 );
}
return dn_match( &be->be_rootndn, ndn );
}
int
be_sync_update( Operation *op )
{
return ( SLAP_SYNC_SHADOW( op->o_bd ) && syncrepl_isupdate( op ) );
}
int
be_slurp_update( Operation *op )
{
return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
be_isupdate_dn( op->o_bd, &op->o_ndn ));
}
int
be_shadow_update( Operation *op )
{
return ( SLAP_SHADOW( op->o_bd ) &&
( syncrepl_isupdate( op ) || be_isupdate_dn( op->o_bd, &op->o_ndn )));
}
int
be_isupdate_dn( Backend *be, struct berval *ndn )
{
if ( !ndn->bv_len ) return( 0 );
if ( !be->be_update_ndn.bv_len ) return( 0 );
return dn_match( &be->be_update_ndn, ndn );
}
struct berval *
be_root_dn( Backend *be )
{
return &be->be_rootdn;
}
int
be_isroot( Operation *op )
{
return be_isroot_dn( op->o_bd, &op->o_ndn );
}
int
be_isroot_pw( Operation *op )
{
int result;
if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
return 0;
}
if( op->o_bd->be_rootpw.bv_len == 0 ) {
return 0;
}
#if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
ldap_pvt_thread_mutex_lock( &passwd_mutex );
#ifdef SLAPD_SPASSWD
lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
#endif
#endif
result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
#if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
#ifdef SLAPD_SPASSWD
lutil_passwd_sasl_conn = NULL;
#endif
ldap_pvt_thread_mutex_unlock( &passwd_mutex );
#endif
return result == 0;
}
int
be_entry_release_rw(
Operation *op,
Entry *e,
int rw )
{
if ( op->o_bd->be_release ) {
/* free and release entry from backend */
return op->o_bd->be_release( op, e, rw );
} else {
/* free entry */
entry_free( e );
return 0;
}
}
int
backend_unbind( Operation *op, SlapReply *rs )
{
int i;
for ( i = 0; i < nbackends; i++ ) {
#if defined( LDAP_SLAPI )
if ( op->o_pb ) {
int rc;
if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)&backends[i] );
rc = slapi_int_call_plugins( &backends[i],
SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
if ( rc < 0 ) {
/*
* A preoperation plugin failure will abort the
* entire operation.
*/
Debug(LDAP_DEBUG_TRACE,
"do_bind: Unbind preoperation plugin failed\n",
0, 0, 0);
return 0;
}
}
#endif /* defined( LDAP_SLAPI ) */
if ( backends[i].be_unbind ) {
op->o_bd = &backends[i];
(*backends[i].be_unbind)( op, rs );
}
#if defined( LDAP_SLAPI )
if ( op->o_pb != NULL && slapi_int_call_plugins( &backends[i],
SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
{
Debug(LDAP_DEBUG_TRACE,
"do_unbind: Unbind postoperation plugins failed\n",
0, 0, 0);
}
#endif /* defined( LDAP_SLAPI ) */
}
return 0;
}
int
backend_connection_init(
Connection *conn )
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].be_connection_init ) {
(*backends[i].be_connection_init)( &backends[i], conn);
}
}
return 0;
}
int
backend_connection_destroy(
Connection *conn )
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].be_connection_destroy ) {
(*backends[i].be_connection_destroy)( &backends[i], conn);
}
}
return 0;
}
static int
backend_check_controls(
Operation *op,
SlapReply *rs )
{
LDAPControl **ctrls = op->o_ctrls;
rs->sr_err = LDAP_SUCCESS;
if( ctrls ) {
for( ; *ctrls != NULL ; ctrls++ ) {
if( (*ctrls)->ldctl_iscritical && !ldap_charray_inlist(
op->o_bd->be_controls, (*ctrls)->ldctl_oid ) )
{
/* FIXME: standards compliance issue
*
* Per RFC 2251 (and LDAPBIS discussions), if the control
* is recognized and appropriate for the operation (which
* we've already verified), then the server should make
* use of the control when performing the operation
* (without regard to criticality). This code is incorrect
* on two counts.
* 1) a service error (e.g., unwillingToPerform) should be
* returned where a particular backend cannot service the
* operation,
* 2) this error should be returned irregardless of the
* criticality of the control.
*/
rs->sr_text = "control unavailable in context";
rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
break;
}
}
}
return rs->sr_err;
}
int
backend_check_restrictions(
Operation *op,
SlapReply *rs,
struct berval *opdata )
{
slap_mask_t restrictops;
slap_mask_t requires;
slap_mask_t opflag;
slap_mask_t exopflag = 0;
slap_ssf_set_t *ssf;
int updateop = 0;
int starttls = 0;
int session = 0;
if( op->o_bd ) {
if ( backend_check_controls( op, rs ) != LDAP_SUCCESS ) {
return rs->sr_err;
}
restrictops = op->o_bd->be_restrictops;
requires = op->o_bd->be_requires;
ssf = &op->o_bd->be_ssf_set;
} else {
restrictops = frontendDB->be_restrictops;
requires = frontendDB->be_requires;
ssf = &frontendDB->be_ssf_set;
}
switch( op->o_tag ) {
case LDAP_REQ_ADD:
opflag = SLAP_RESTRICT_OP_ADD;
updateop++;
break;
case LDAP_REQ_BIND:
opflag = SLAP_RESTRICT_OP_BIND;
session++;
break;
case LDAP_REQ_COMPARE:
opflag = SLAP_RESTRICT_OP_COMPARE;
break;
case LDAP_REQ_DELETE:
updateop++;
opflag = SLAP_RESTRICT_OP_DELETE;
break;
case LDAP_REQ_EXTENDED:
opflag = SLAP_RESTRICT_OP_EXTENDED;
if( !opdata ) {
/* treat unspecified as a modify */
opflag = SLAP_RESTRICT_OP_MODIFY;
updateop++;
break;
}
if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
session++;
starttls++;
exopflag = SLAP_RESTRICT_EXOP_START_TLS;
break;
}
if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
break;
}
if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
exopflag = SLAP_RESTRICT_EXOP_CANCEL;
break;
}
if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
updateop++;
break;
}
/* treat everything else as a modify */
opflag = SLAP_RESTRICT_OP_MODIFY;
updateop++;
break;
case LDAP_REQ_MODIFY:
updateop++;
opflag = SLAP_RESTRICT_OP_MODIFY;
break;
case LDAP_REQ_RENAME:
updateop++;
opflag = SLAP_RESTRICT_OP_RENAME;
break;
case LDAP_REQ_SEARCH:
opflag = SLAP_RESTRICT_OP_SEARCH;
break;
case LDAP_REQ_UNBIND:
session++;
opflag = 0;
break;
default:
rs->sr_text = "restrict operations internal error";
rs->sr_err = LDAP_OTHER;
return rs->sr_err;
}
if ( !starttls ) {
/* these checks don't apply to StartTLS */
rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
if( op->o_transport_ssf < ssf->sss_transport ) {
rs->sr_text = op->o_transport_ssf
? "stronger transport confidentiality required"
: "transport confidentiality required";
return rs->sr_err;
}
if( op->o_tls_ssf < ssf->sss_tls ) {
rs->sr_text = op->o_tls_ssf
? "stronger TLS confidentiality required"
: "TLS confidentiality required";
return rs->sr_err;
}
if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
/* simple bind specific check */
if( op->o_ssf < ssf->sss_simple_bind ) {
rs->sr_text = op->o_ssf
? "stronger confidentiality required"
: "confidentiality required";
return rs->sr_err;
}
}
if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
/* these checks don't apply to SASL bind */
if( op->o_sasl_ssf < ssf->sss_sasl ) {
rs->sr_text = op->o_sasl_ssf
? "stronger SASL confidentiality required"
: "SASL confidentiality required";
return rs->sr_err;
}
if( op->o_ssf < ssf->sss_ssf ) {
rs->sr_text = op->o_ssf
? "stronger confidentiality required"
: "confidentiality required";
return rs->sr_err;
}
}
if( updateop ) {
if( op->o_transport_ssf < ssf->sss_update_transport ) {
rs->sr_text = op->o_transport_ssf
? "stronger transport confidentiality required for update"
: "transport confidentiality required for update";
return rs->sr_err;
}
if( op->o_tls_ssf < ssf->sss_update_tls ) {
rs->sr_text = op->o_tls_ssf
? "stronger TLS confidentiality required for update"
: "TLS confidentiality required for update";
return rs->sr_err;
}
if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
rs->sr_text = op->o_sasl_ssf
? "stronger SASL confidentiality required for update"
: "SASL confidentiality required for update";
return rs->sr_err;
}
if( op->o_ssf < ssf->sss_update_ssf ) {
rs->sr_text = op->o_ssf
? "stronger confidentiality required for update"
: "confidentiality required for update";
return rs->sr_err;
}
if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
op->o_ndn.bv_len == 0 )
{
rs->sr_text = "modifications require authentication";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
#ifdef SLAP_X_LISTENER_MOD
if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( op->o_ndn.bv_len > 0 ? S_IWUSR : S_IWOTH ) ) ) {
/* no "w" mode means readonly */
rs->sr_text = "modifications not allowed on this listener";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
#endif /* SLAP_X_LISTENER_MOD */
}
}
if ( !session ) {
/* these checks don't apply to Bind, StartTLS, or Unbind */
if( requires & SLAP_REQUIRE_STRONG ) {
/* should check mechanism */
if( ( op->o_transport_ssf < ssf->sss_transport
&& op->o_authtype == LDAP_AUTH_SIMPLE )
|| op->o_dn.bv_len == 0 )
{
rs->sr_text = "strong(er) authentication required";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_SASL ) {
if( op->o_authtype != LDAP_AUTH_SASL || op->o_dn.bv_len == 0 ) {
rs->sr_text = "SASL authentication required";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_AUTHC ) {
if( op->o_dn.bv_len == 0 ) {
rs->sr_text = "authentication required";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_BIND ) {
int version;
ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
version = op->o_conn->c_protocol;
ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
if( !version ) {
/* no bind has occurred */
rs->sr_text = "BIND required";
rs->sr_err = LDAP_OPERATIONS_ERROR;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_LDAP_V3 ) {
if( op->o_protocol < LDAP_VERSION3 ) {
/* no bind has occurred */
rs->sr_text = "operation restricted to LDAPv3 clients";
rs->sr_err = LDAP_OPERATIONS_ERROR;
return rs->sr_err;
}
}
#ifdef SLAP_X_LISTENER_MOD
if ( !starttls && op->o_dn.bv_len == 0 ) {
if ( op->o_conn->c_listener &&
!( op->o_conn->c_listener->sl_perms & S_IXOTH ))
{
/* no "x" mode means bind required */
rs->sr_text = "bind required on this listener";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
}
if ( !starttls && !updateop ) {
if ( op->o_conn->c_listener &&
!( op->o_conn->c_listener->sl_perms &
( op->o_dn.bv_len > 0 ? S_IRUSR : S_IROTH )))
{
/* no "r" mode means no read */
rs->sr_text = "read not allowed on this listener";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
}
#endif /* SLAP_X_LISTENER_MOD */
}
if( ( restrictops & opflag )
|| ( exopflag && ( restrictops & exopflag ) ) ) {
if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
rs->sr_text = "read operations restricted";
} else if ( restrictops & exopflag ) {
rs->sr_text = "extended operation restricted";
} else {
rs->sr_text = "operation restricted";
}
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
rs->sr_err = LDAP_SUCCESS;
return rs->sr_err;
}
int backend_check_referrals( Operation *op, SlapReply *rs )
{
rs->sr_err = LDAP_SUCCESS;
if( op->o_bd->be_chk_referrals ) {
rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
send_ldap_result( op, rs );
}
}
return rs->sr_err;
}
int
be_entry_get_rw(
Operation *op,
struct berval *ndn,
ObjectClass *oc,
AttributeDescription *at,
int rw,
Entry **e )
{
int rc;
*e = NULL;
if (op->o_bd == NULL) {
rc = LDAP_NO_SUCH_OBJECT;
} else if ( op->o_bd->be_fetch ) {
rc = ( op->o_bd->be_fetch )( op, ndn,
oc, at, rw, e );
} else {
rc = LDAP_UNWILLING_TO_PERFORM;
}
return rc;
}
int
backend_group(
Operation *op,
Entry *target,
struct berval *gr_ndn,
struct berval *op_ndn,
ObjectClass *group_oc,
AttributeDescription *group_at )
{
Entry *e;
Attribute *a;
int rc;
GroupAssertion *g;
Backend *be = op->o_bd;
if ( op->o_abandon ) return SLAPD_ABANDON;
op->o_bd = select_backend( gr_ndn, 0, 0 );
for (g = op->o_groups; g; g=g->ga_next) {
if (g->ga_be != op->o_bd || g->ga_oc != group_oc ||
g->ga_at != group_at || g->ga_len != gr_ndn->bv_len)
continue;
if (strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0)
break;
}
if (g) {
rc = g->ga_res;
goto done;
}
if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
e = target;
rc = 0;
} else {
rc = be_entry_get_rw(op, gr_ndn, group_oc, group_at, 0, &e );
}
if ( e ) {
#ifdef LDAP_SLAPI
if ( op->o_pb != NULL ) {
init_group_pblock( op, target, e, op_ndn, group_at );
rc = call_group_preop_plugins( op );
if ( rc == LDAP_SUCCESS ) {
goto done;
}
}
#endif /* LDAP_SLAPI */
a = attr_find( e->e_attrs, group_at );
if ( a ) {
/* If the attribute is a subtype of labeledURI, treat this as
* a dynamic group ala groupOfURLs
*/
if (is_at_subtype( group_at->ad_type,
slap_schema.si_ad_labeledURI->ad_type ) )
{
int i;
LDAPURLDesc *ludp;
struct berval bv, nbase;
Filter *filter;
Entry *user;
Backend *b2 = op->o_bd;
void *o_private = op->o_private;
if ( target && dn_match( &target->e_nname, op_ndn ) ) {
user = target;
} else {
/* back-bdb stored lockinfo here, we saved it
* above. Clear it out so that a new lock can be used.
*/
op->o_private = NULL;
op->o_bd = select_backend( op_ndn, 0, 0 );
rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
}
if ( rc == 0 ) {
rc = 1;
for (i=0; a->a_vals[i].bv_val; i++) {
if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
LDAP_SUCCESS )
{
continue;
}
nbase.bv_val = NULL;
/* host part must be empty */
/* attrs and extensions parts must be empty */
if (( ludp->lud_host && *ludp->lud_host ) ||
ludp->lud_attrs || ludp->lud_exts )
{
goto loopit;
}
ber_str2bv( ludp->lud_dn, 0, 0, &bv );
if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
op->o_tmpmemctx ) != LDAP_SUCCESS )
{
goto loopit;
}
switch(ludp->lud_scope) {
case LDAP_SCOPE_BASE:
if ( !dn_match( &nbase, op_ndn )) goto loopit;
break;
case LDAP_SCOPE_ONELEVEL:
dnParent(op_ndn, &bv );
if ( !dn_match( &nbase, &bv )) goto loopit;
break;
case LDAP_SCOPE_SUBTREE:
if ( !dnIsSuffix( op_ndn, &nbase )) goto loopit;
break;
#ifdef LDAP_SCOPE_SUBORDINATE
case LDAP_SCOPE_SUBORDINATE:
if ( dn_match( &nbase, op_ndn ) &&
!dnIsSuffix(op_ndn, &nbase ))
{
goto loopit;
}
#endif
}
filter = str2filter_x( op, ludp->lud_filter );
if ( filter ) {
if ( test_filter( NULL, user, filter ) ==
LDAP_COMPARE_TRUE )
{
rc = 0;
}
filter_free_x( op, filter );
}
loopit:
ldap_free_urldesc( ludp );
if ( nbase.bv_val ) {
op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
}
if ( rc == 0 ) break;
}
if ( user != target ) {
be_entry_release_r( op, user );
/* restore previous lockinfo, if any */
op->o_private = o_private;
}
}
op->o_bd = b2;
} else {
rc = value_find_ex( group_at,
SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
a->a_nvals, op_ndn, op->o_tmpmemctx );
}
} else {
rc = LDAP_NO_SUCH_ATTRIBUTE;
}
if (e != target ) {
be_entry_release_r( op, e );
}
} else {
rc = LDAP_NO_SUCH_OBJECT;
}
#ifdef LDAP_SLAPI
if ( op->o_pb ) call_group_postop_plugins( op );
#endif /* LDAP_SLAPI */
if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
g = op->o_tmpalloc(sizeof(GroupAssertion) + gr_ndn->bv_len,
op->o_tmpmemctx);
g->ga_be = op->o_bd;
g->ga_oc = group_oc;
g->ga_at = group_at;
g->ga_res = rc;
g->ga_len = gr_ndn->bv_len;
strcpy(g->ga_ndn, gr_ndn->bv_val);
g->ga_next = op->o_groups;
op->o_groups = g;
}
done:
op->o_bd = be;
return rc;
}
#ifdef LDAP_SLAPI
static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
{
BerVarray v;
int rc;
BerVarray *vals = (BerVarray *)c->cac_private;
Operation *op = NULL;
int i, j;
slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
if ( op == NULL ) {
return 1;
}
if ( op->o_conn && access_allowed( op,
e, a->a_desc, NULL, ACL_AUTH,
&c->cac_acl_state ) == 0 ) {
return 1;
}
for ( i=0; a->a_vals[i].bv_val; i++ ) ;
v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
op->o_tmpmemctx );
for ( i=0,j=0; a->a_vals[i].bv_val; i++ ) {
if ( op->o_conn && access_allowed( op,
e, a->a_desc,
&a->a_nvals[i],
ACL_AUTH, &c->cac_acl_state ) == 0 ) {
continue;
}
ber_dupbv_x( &v[j],
&a->a_nvals[i], op->o_tmpmemctx );
if (v[j].bv_val ) j++;
}
if (j == 0) {
op->o_tmpfree( v, op->o_tmpmemctx );
*vals = NULL;
rc = 1;
} else {
v[j].bv_val = NULL;
v[j].bv_len = 0;
*vals = v;
rc = 0;
}
return rc;
}
#endif /* LDAP_SLAPI */
int
backend_attribute(
Operation *op,
Entry *target,
struct berval *edn,
AttributeDescription *entry_at,
BerVarray *vals,
slap_access_t access )
{
Entry *e;
Attribute *a;
int i, j, rc = LDAP_SUCCESS;
AccessControlState acl_state = ACL_STATE_INIT;
Backend *be = op->o_bd;
op->o_bd = select_backend( edn, 0, 0 );
if ( target && dn_match( &target->e_nname, edn ) ) {
e = target;
} else {
rc = be_entry_get_rw(op, edn, NULL, entry_at, 0, &e );
}
if ( e ) {
a = attr_find( e->e_attrs, entry_at );
if ( a ) {
BerVarray v;
if ( op->o_conn && access > ACL_NONE && access_allowed( op,
e, entry_at, NULL, access,
&acl_state ) == 0 ) {
rc = LDAP_INSUFFICIENT_ACCESS;
goto freeit;
}
for ( i=0; a->a_vals[i].bv_val; i++ ) ;
v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
op->o_tmpmemctx );
for ( i=0,j=0; a->a_vals[i].bv_val; i++ ) {
if ( op->o_conn && access > ACL_NONE && access_allowed( op,
e, entry_at,
&a->a_nvals[i],
access, &acl_state ) == 0 ) {
continue;
}
ber_dupbv_x( &v[j],
&a->a_nvals[i], op->o_tmpmemctx );
if (v[j].bv_val ) j++;
}
if (j == 0) {
op->o_tmpfree( v, op->o_tmpmemctx );
*vals = NULL;
rc = LDAP_INSUFFICIENT_ACCESS;
} else {
v[j].bv_val = NULL;
v[j].bv_len = 0;
*vals = v;
rc = LDAP_SUCCESS;
}
}
#ifdef LDAP_SLAPI
else if ( op->o_pb ) {
/* try any computed attributes */
computed_attr_context ctx;
AttributeName aname;
slapi_int_pblock_set_operation( op->o_pb, op );
ctx.cac_pb = op->o_pb;
ctx.cac_attrs = NULL;
ctx.cac_userattrs = 0;
ctx.cac_opattrs = 0;
ctx.cac_acl_state = acl_state;
ctx.cac_private = (void *)vals;
if ( compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr ) == 1)
rc = LDAP_INSUFFICIENT_ACCESS;
else
rc = LDAP_SUCCESS;
}
#endif /* LDAP_SLAPI */
freeit: if (e != target ) {
be_entry_release_r( op, e );
}
}
op->o_bd = be;
return rc;
}
int backend_operational(
Operation *op,
SlapReply *rs )
{
Attribute **ap;
int rc = 0;
for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
/* just count them */ ;
/*
* If operational attributes (allegedly) are required,
* and the backend supports specific operational attributes,
* add them to the attribute list
*/
if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( op->ors_attrs &&
ad_inlist( slap_schema.si_ad_entryDN, op->ors_attrs )))
{
*ap = slap_operational_entryDN( rs->sr_entry );
ap = &(*ap)->a_next;
}
if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( op->ors_attrs &&
ad_inlist( slap_schema.si_ad_subschemaSubentry, op->ors_attrs )))
{
*ap = slap_operational_subschemaSubentry( op->o_bd );
ap = &(*ap)->a_next;
}
if (( SLAP_OPATTRS( rs->sr_attr_flags ) || op->ors_attrs ) &&
op->o_bd && op->o_bd->be_operational != NULL )
{
Attribute *a;
a = rs->sr_operational_attrs;
rs->sr_operational_attrs = NULL;
rc = op->o_bd->be_operational( op, rs );
*ap = rs->sr_operational_attrs;
if ( a != NULL ) {
rs->sr_operational_attrs = a;
}
for ( ; *ap; ap = &(*ap)->a_next )
/* just count them */ ;
}
return rc;
}
#ifdef LDAP_SLAPI
static void init_group_pblock( Operation *op, Entry *target,
Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
{
slapi_int_pblock_set_operation( op->o_pb, op );
slapi_pblock_set( op->o_pb,
SLAPI_X_GROUP_ENTRY, (void *)e );
slapi_pblock_set( op->o_pb,
SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
slapi_pblock_set( op->o_pb,
SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
slapi_pblock_set( op->o_pb,
SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
}
static int call_group_preop_plugins( Operation *op )
{
int rc;
rc = slapi_int_call_plugins( op->o_bd,
SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
if ( rc < 0 ) {
if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
(void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
{
rc = LDAP_NO_SUCH_ATTRIBUTE;
}
} else {
rc = LDAP_SUCCESS;
}
return rc;
}
static void call_group_postop_plugins( Operation *op )
{
(void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
}
#endif /* LDAP_SLAPI */
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