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openldap/servers/slapd/backend.c

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/* backend.c - routines for dealing with back-end databases */
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include <sys/stat.h>
#include "slap.h"
#include "lutil.h"
#ifdef SLAPD_LDBM
#include "back-ldbm/external.h"
#endif
#ifdef SLAPD_BDB2
#include "back-bdb2/external.h"
#endif
#ifdef SLAPD_PASSWD
#include "back-passwd/external.h"
#endif
#ifdef SLAPD_PERL
#include "back-perl/external.h"
#endif
#ifdef SLAPD_SHELL
#include "back-shell/external.h"
#endif
#ifdef SLAPD_TCL
#include "back-tcl/external.h"
#endif
static BackendInfo binfo[] = {
#ifdef SLAPD_LDBM
{"ldbm", ldbm_back_initialize},
#endif
#ifdef SLAPD_BDB2
{"bdb2", bdb2_back_initialize},
#endif
#ifdef SLAPD_PASSWD
{"passwd", passwd_back_initialize},
#endif
#ifdef SLAPD_PERL
{"perl", perl_back_initialize},
#endif
#ifdef SLAPD_SHELL
{"shell", shell_back_initialize},
#endif
#ifdef SLAPD_TCL
{"tcl", tcl_back_initialize},
#endif
{NULL}
};
int nBackendInfo = 0;
BackendInfo *backendInfo = NULL;
int nBackendDB = 0;
BackendDB *backendDB = NULL;
int backend_init(void)
{
int rc = -1;
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++ )
{
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;
}
Debug( LDAP_DEBUG_ANY,
"backend_init: failed\n",
0, 0, 0 );
return rc;
}
int backend_startup(int n)
{
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(n >= 0) {
/* startup a specific backend database */
Debug( LDAP_DEBUG_TRACE,
"backend_startup: starting database %d\n",
n, 0, 0 );
/* make sure, n does not exceed the number of backend databases */
if ( n >= nbackends ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: database number %d exceeding maximum (%d)\n",
n, nbackends, 0 );
return 1;
}
if ( backendDB[n].bd_info->bi_open ) {
rc = backendDB[n].bd_info->bi_open(
backendDB[n].bd_info );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_open failed!\n",
0, 0, 0 );
return rc;
}
if ( backendDB[n].bd_info->bi_db_open ) {
rc = backendDB[n].bd_info->bi_db_open(
&backendDB[n] );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_open failed!\n",
0, 0, 0 );
return rc;
}
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;
}
}
/* open each backend database */
for( i = 0; i < nBackendDB; i++ ) {
if ( backendDB[i].bd_info->bi_db_open ) {
rc = backendDB[i].bd_info->bi_db_open(
&backendDB[i] );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_open %d failed!\n",
i, 0, 0 );
return rc;
}
}
return rc;
}
int backend_shutdown(int n)
{
int i;
int rc = 0;
if(n >= 0) {
/* shutdown a specific backend database */
/* make sure, n does not exceed the number of backend databases */
if ( n >= nbackends ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: database number %d exceeding maximum (%d)\n",
n, nbackends, 0 );
return 1;
}
if ( backendDB[n].bd_info->bi_nDB == 0 ) {
/* no database of this type, we never opened it */
return 0;
}
if ( backendDB[n].bd_info->bi_db_close ) {
backendDB[n].bd_info->bi_db_close(
&backendDB[n] );
}
if( backendDB[n].bd_info->bi_close ) {
backendDB[n].bd_info->bi_close(
backendDB[n].bd_info );
}
return 0;
}
/* close each backend database */
for( i = 0; i < nBackendDB; i++ ) {
BackendInfo *bi;
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_close %s failed!\n",
bi->bi_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] );
}
}
return 0;
}
int backend_destroy(void)
{
int i;
/* destroy each backend database */
for( i = 0; i < nBackendDB; i++ ) {
if ( backendDB[i].bd_info->bi_db_destroy ) {
backendDB[i].bd_info->bi_db_destroy(
&backendDB[i] );
}
}
/* destroy each backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( backendInfo[i].bi_destroy ) {
backendInfo[i].bi_destroy(
&backendInfo[i] );
}
}
return 0;
}
BackendInfo* backend_info(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(
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;
}
backendDB = (BackendDB *) ch_realloc(
(char *) backendDB,
(nBackendDB + 1) * sizeof(Backend) );
memset( &backendDB[nbackends], '\0', sizeof(Backend) );
be = &backends[nbackends++];
be->bd_info = bi;
be->be_sizelimit = defsize;
be->be_timelimit = deftime;
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] );
}
}
}
Backend *
select_backend( char * dn )
{
int i, j, len, dnlen;
dnlen = strlen( dn );
for ( i = 0; i < nbackends; i++ ) {
for ( j = 0; backends[i].be_suffix != NULL &&
backends[i].be_suffix[j] != NULL; j++ )
{
len = strlen( backends[i].be_suffix[j] );
if ( len > dnlen ) {
continue;
}
if ( strcmp( backends[i].be_suffix[j],
dn + (dnlen - len) ) == 0 ) {
return( &backends[i] );
}
}
}
/* if no proper suffix could be found then check for aliases */
for ( i = 0; i < nbackends; i++ ) {
for ( j = 0;
backends[i].be_suffixAlias != NULL &&
backends[i].be_suffixAlias[j] != NULL;
j += 2 )
{
len = strlen( backends[i].be_suffixAlias[j] );
if ( len > dnlen ) {
continue;
}
if ( strcmp( backends[i].be_suffixAlias[j],
dn + (dnlen - len) ) == 0 ) {
return( &backends[i] );
}
}
}
#ifdef LDAP_ALLOW_NULL_SEARCH_BASE
/* Add greg@greg.rim.or.jp
* It's quick hack for cheap client
* Some browser offer a NULL base at ldap_search
*
* Should only be used as a last resort. -Kdz
*/
if(dnlen == 0) {
Debug( LDAP_DEBUG_TRACE,
"select_backend: use default backend\n", 0, 0, 0 );
return( &backends[0] );
}
#endif /* LDAP_ALLOW_NULL_SEARCH_BASE */
return( NULL );
}
int
be_issuffix(
Backend *be,
char *suffix
)
{
int i;
for ( i = 0; be->be_suffix != NULL && be->be_suffix[i] != NULL; i++ ) {
if ( strcmp( be->be_suffix[i], suffix ) == 0 ) {
return( 1 );
}
}
return( 0 );
}
int
be_isroot( Backend *be, char *ndn )
{
int rc;
if ( ndn == NULL || be->be_root_ndn == NULL ) {
return( 0 );
}
rc = strcmp( be->be_root_ndn, ndn ) ? 0 : 1;
return(rc);
}
char *
be_root_dn( Backend *be )
{
if ( be->be_root_dn == NULL ) {
return( "" );
}
return be->be_root_dn;
}
int
be_isroot_pw( Backend *be, char *ndn, struct berval *cred )
{
int result;
if ( ! be_isroot( be, ndn ) ) {
return( 0 );
}
#ifdef SLAPD_CRYPT
ldap_pvt_thread_mutex_lock( &crypt_mutex );
#endif
result = lutil_passwd( cred->bv_val, be->be_root_pw );
#ifdef SLAPD_CRYPT
ldap_pvt_thread_mutex_unlock( &crypt_mutex );
#endif
return result == 0;
}
int
backend_unbind(
Connection *conn,
Operation *op
)
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].be_unbind ) {
(*backends[i].be_unbind)( &backends[i], conn, op );
}
}
return 0;
}
#ifdef SLAPD_ACLGROUPS
int
backend_group(
Backend *be,
Entry *target,
char *gr_ndn,
char *op_ndn,
char *objectclassValue,
char *groupattrName
)
{
if (be->be_group)
return( be->be_group(be, target, gr_ndn, op_ndn,
objectclassValue, groupattrName) );
else
return(1);
}
#endif
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