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/*
* Copyright (C) 2012 Tobias Brunner
* Copyright (C) 2012 Giuliano Grassi
* Copyright (C) 2012 Ralf Sager
* Hochschule fuer Technik Rapperswil
*
* 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 "ipsec_policy_mgr.h"
#include "ipsec_policy.h"
#include <debug.h>
#include <library.h>
#include <ipsec/ipsec_types.h>
#include <selectors/traffic_selector.h>
#include <threading/rwlock.h>
#include <utils/host.h>
#include <utils/linked_list.h>
typedef struct private_ipsec_policy_mgr_t private_ipsec_policy_mgr_t;
/**
* Private additions to ipsec_policy_mgr_t.
*/
struct private_ipsec_policy_mgr_t {
/**
* Public members of ipsec_policy_mgr_t.
*/
ipsec_policy_mgr_t public;
/**
* Installed policies
*/
linked_list_t *policies;
/**
* Lock to safely access policies
*/
rwlock_t *lock;
};
static bool match_policy(ipsec_policy_t *policy, ipsec_policy_t *other_policy)
{
return policy->match(policy, other_policy->get_source_ts(other_policy),
other_policy->get_destination_ts(other_policy),
other_policy->get_direction(other_policy),
other_policy->get_reqid(other_policy),
(mark_t){ .value = 0, },
other_policy->get_priority(other_policy));
}
METHOD(ipsec_policy_mgr_t, add_policy, status_t,
private_ipsec_policy_mgr_t *this, host_t *src, host_t *dst,
traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, mark_t mark,
policy_priority_t priority)
{
ipsec_policy_t *policy;
policy = ipsec_policy_create(src, dst, src_ts, dst_ts, direction, type, sa,
mark, priority);
this->lock->write_lock(this->lock);
if (this->policies->find_first(this->policies, (void*)match_policy,
NULL, policy) != SUCCESS)
{
this->policies->insert_last(this->policies, policy);
}
else
{
policy->destroy(policy);
}
this->lock->unlock(this->lock);
return SUCCESS;
}
METHOD(ipsec_policy_mgr_t, del_policy, status_t,
private_ipsec_policy_mgr_t *this, traffic_selector_t *src_ts,
traffic_selector_t *dst_ts, policy_dir_t direction, u_int32_t reqid,
mark_t mark, policy_priority_t priority)
{
enumerator_t *enumerator;
ipsec_policy_t *current, *found = NULL;
this->lock->write_lock(this->lock);
enumerator = this->policies->create_enumerator(this->policies);
while (enumerator->enumerate(enumerator, (void**)¤t))
{
if (current->match(current, src_ts, dst_ts, direction, reqid,
mark, priority))
{
this->policies->remove_at(this->policies, enumerator);
found = current;
break;
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
if (found)
{
found->destroy(found);
return SUCCESS;
}
return FAILED;
}
METHOD(ipsec_policy_mgr_t, flush_policies, status_t,
private_ipsec_policy_mgr_t *this)
{
ipsec_policy_t *policy;
DBG2(DBG_ESP, "flushing policies");
this->lock->write_lock(this->lock);
while (this->policies->remove_last(this->policies,
(void**)&policy) == SUCCESS)
{
policy->destroy(policy);
}
this->lock->unlock(this->lock);
return SUCCESS;
}
METHOD(ipsec_policy_mgr_t, destroy, void,
private_ipsec_policy_mgr_t *this)
{
flush_policies(this);
this->policies->destroy(this->policies);
this->lock->destroy(this->lock);
free(this);
}
/**
* Described in header.
*/
ipsec_policy_mgr_t *ipsec_policy_mgr_create()
{
private_ipsec_policy_mgr_t *this;
INIT(this,
.public = {
.add_policy = _add_policy,
.del_policy = _del_policy,
.flush_policies = _flush_policies,
.destroy = _destroy,
},
.policies = linked_list_create(),
.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
);
return &this->public;
}
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