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/* dyngroup.c - Demonstration of overlay code */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2003-2018 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 "lutil.h"
#include "slap.h"
#include "config.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 dgroup_cf( ConfigArgs *c )
{
slap_overinst *on = (slap_overinst *)c->bi;
int rc = 1;
switch( c->op ) {
case SLAP_CONFIG_EMIT:
{
adpair *ap;
for ( ap = on->on_bi.bi_private; ap; ap = ap->ap_next ) {
struct berval bv;
char *ptr;
bv.bv_len = ap->ap_mem->ad_cname.bv_len + 1 +
ap->ap_uri->ad_cname.bv_len;
bv.bv_val = ch_malloc( bv.bv_len + 1 );
ptr = lutil_strcopy( bv.bv_val, ap->ap_mem->ad_cname.bv_val );
*ptr++ = ' ';
strcpy( ptr, ap->ap_uri->ad_cname.bv_val );
ber_bvarray_add( &c->rvalue_vals, &bv );
rc = 0;
}
}
break;
case LDAP_MOD_DELETE:
if ( c->valx == -1 ) {
adpair *ap;
while (( ap = on->on_bi.bi_private )) {
on->on_bi.bi_private = ap->ap_next;
ch_free( ap );
}
} else {
adpair **app, *ap;
int i;
app = (adpair **)&on->on_bi.bi_private;
for (i=0; i<=c->valx; i++, app = &ap->ap_next) {
ap = *app;
}
*app = ap->ap_next;
ch_free( ap );
}
rc = 0;
break;
case SLAP_CONFIG_ADD:
case LDAP_MOD_ADD:
{
adpair ap = { NULL, NULL, NULL }, *a2;
const char *text;
if ( slap_str2ad( c->argv[1], &ap.ap_mem, &text ) ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s attribute description unknown: \"%s\"",
c->argv[0], c->argv[1] );
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
"%s: %s\n", c->log, c->cr_msg, 0 );
return ARG_BAD_CONF;
}
if ( slap_str2ad( c->argv[2], &ap.ap_uri, &text ) ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s attribute description unknown: \"%s\"",
c->argv[0], c->argv[2] );
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
"%s: %s\n", c->log, c->cr_msg, 0 );
return ARG_BAD_CONF;
}
/* 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;
rc = 0;
}
}
return rc;
}
static ConfigTable dgroupcfg[] = {
{ "attrpair", "member-attribute> <URL-attribute", 3, 3, 0,
ARG_MAGIC, dgroup_cf,
"( OLcfgOvAt:17.1 NAME 'olcDGAttrPair' "
"DESC 'Member and MemberURL attribute pair' "
"SYNTAX OMsDirectoryString )", NULL, NULL },
{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
};
static ConfigOCs dgroupocs[] = {
{ "( OLcfgOvOc:17.1 "
"NAME 'olcDGConfig' "
"DESC 'Dynamic Group configuration' "
"SUP olcOverlayConfig "
"MAY olcDGAttrPair )",
Cft_Overlay, dgroupcfg },
{ NULL, 0, NULL }
};
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_destroy(
BackendDB *be,
ConfigReply *cr
)
{
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() {
int code;
dyngroup.on_bi.bi_type = "dyngroup";
dyngroup.on_bi.bi_db_destroy = dyngroup_destroy;
dyngroup.on_response = dyngroup_response;
dyngroup.on_bi.bi_cf_ocs = dgroupocs;
code = config_register_schema( dgroupcfg, dgroupocs );
if ( code ) return code;
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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