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/*
* Copyright (C) 2012 Martin Willi
* Copyright (C) 2012 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "unity_narrow.h"
#include <daemon.h>
typedef struct private_unity_narrow_t private_unity_narrow_t;
/**
* Private data of an unity_narrow_t object.
*/
struct private_unity_narrow_t {
/**
* Public unity_narrow_t interface.
*/
unity_narrow_t public;
/**
* Unity attribute handler
*/
unity_handler_t *handler;
};
METHOD(listener_t, narrow, bool,
private_unity_narrow_t *this, ike_sa_t *ike_sa, child_sa_t *child_sa,
narrow_hook_t type, linked_list_t *local, linked_list_t *remote)
{
traffic_selector_t *current, *orig = NULL;
enumerator_t *enumerator;
if (type == NARROW_INITIATOR_POST_AUTH &&
remote->get_count(remote) == 1)
{
enumerator = this->handler->create_include_enumerator(this->handler,
ike_sa->get_unique_id(ike_sa));
while (enumerator->enumerate(enumerator, ¤t))
{
if (orig == NULL)
{ /* got one, replace original TS */
remote->remove_first(remote, (void**)&orig);
}
current = orig->get_subset(orig, current);
if (current)
{
remote->insert_last(remote, current);
}
}
enumerator->destroy(enumerator);
if (orig)
{
DBG1(DBG_CFG, "narrowed CHILD_SA to %N %#R",
configuration_attribute_type_names,
UNITY_SPLIT_INCLUDE, remote);
orig->destroy(orig);
}
}
return TRUE;
}
METHOD(unity_narrow_t, destroy, void,
private_unity_narrow_t *this)
{
free(this);
}
/**
* See header
*/
unity_narrow_t *unity_narrow_create(unity_handler_t *handler)
{
private_unity_narrow_t *this;
INIT(this,
.public = {
.listener = {
.narrow = _narrow,
},
.destroy = _destroy,
},
.handler = handler,
);
return &this->public;
}
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