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/* dyngroup.c - Demonstration of overlay code */
/* $OpenLDAP: pkg/ldap/servers/slapd/overlays/dyngroup.c,v 1.5.2.5 2006/01/03 22:16:24 kurt Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2003-2006 The OpenLDAP Foundation.
* Copyright 2003 by 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 Howard Chu for inclusion in
* OpenLDAP Software.
*/
#include "portable.h"
#ifdef SLAPD_OVER_DYNGROUP
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include "slap.h"
/* This overlay extends the Compare operation to detect members of a
* dynamic group. It has no effect on any other operations. It must
* be configured with a pair of attributes to trigger on, e.g.
* attrpair member memberURL
* will cause compares on "member" to trigger a compare on "memberURL".
*/
typedef struct adpair {
struct adpair *ap_next;
AttributeDescription *ap_mem;
AttributeDescription *ap_uri;
} adpair;
static int
dyngroup_response( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
adpair *ap = on->on_bi.bi_private;
/* If we've been configured and the current response is
* what we're looking for...
*/
if ( ap && op->o_tag == LDAP_REQ_COMPARE &&
rs->sr_err == LDAP_NO_SUCH_ATTRIBUTE ) {
for (;ap;ap=ap->ap_next) {
if ( op->oq_compare.rs_ava->aa_desc == ap->ap_mem ) {
/* This compare is for one of the attributes we're
* interested in. We'll use slapd's existing dyngroup
* evaluator to get the answer we want.
*/
int cache = op->o_do_not_cache;
op->o_do_not_cache = 1;
rs->sr_err = backend_group( op, NULL, &op->o_req_ndn,
&op->oq_compare.rs_ava->aa_value, NULL, ap->ap_uri );
op->o_do_not_cache = cache;
switch ( rs->sr_err ) {
case LDAP_SUCCESS:
rs->sr_err = LDAP_COMPARE_TRUE;
break;
case LDAP_NO_SUCH_OBJECT:
rs->sr_err = LDAP_COMPARE_FALSE;
break;
}
break;
}
}
}
/* Default is to just fall through to the normal processing */
return SLAP_CB_CONTINUE;
}
static int dyngroup_config(
BackendDB *be,
const char *fname,
int lineno,
int argc,
char **argv
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
adpair ap = { NULL, NULL, NULL }, *a2;
if ( strcasecmp( argv[0], "attrpair" ) == 0 ) {
const char *text;
if ( argc != 3 ) {
Debug( LDAP_DEBUG_ANY, "%s: line %d: "
"attribute description missing in "
"\"attrpair <member-attribute> <URL-attribute>\" line.\n",
fname, lineno, 0 );
return( 1 );
}
if ( slap_str2ad( argv[1], &ap.ap_mem, &text ) ) {
Debug( LDAP_DEBUG_ANY, "%s: line %d: "
"attribute description unknown \"attrpair\" line: %s.\n",
fname, lineno, text );
return( 1 );
}
if ( slap_str2ad( argv[2], &ap.ap_uri, &text ) ) {
Debug( LDAP_DEBUG_ANY, "%s: line %d: "
"attribute description unknown \"attrpair\" line: %s.\n",
fname, lineno, text );
return( 1 );
}
/* The on->on_bi.bi_private pointer can be used for
* anything this instance of the overlay needs.
*/
a2 = ch_malloc( sizeof(adpair) );
a2->ap_next = on->on_bi.bi_private;
a2->ap_mem = ap.ap_mem;
a2->ap_uri = ap.ap_uri;
on->on_bi.bi_private = a2;
} else {
return SLAP_CONF_UNKNOWN;
}
return 0;
}
static int
dyngroup_close(
BackendDB *be
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
adpair *ap, *a2;
for ( ap = on->on_bi.bi_private; ap; ap = a2 ) {
a2 = ap->ap_next;
ch_free( ap );
}
return 0;
}
static slap_overinst dyngroup;
/* This overlay is set up for dynamic loading via moduleload. For static
* configuration, you'll need to arrange for the slap_overinst to be
* initialized and registered by some other function inside slapd.
*/
int dyngroup_initialize() {
dyngroup.on_bi.bi_type = "dyngroup";
dyngroup.on_bi.bi_db_config = dyngroup_config;
dyngroup.on_bi.bi_db_close = dyngroup_close;
dyngroup.on_response = dyngroup_response;
return overlay_register( &dyngroup );
}
#if SLAPD_OVER_DYNGROUP == SLAPD_MOD_DYNAMIC
int
init_module( int argc, char *argv[] )
{
return dyngroup_initialize();
}
#endif
#endif /* defined(SLAPD_OVER_DYNGROUP) */
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