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/*
* Copyright (C) 2007 Martin Willi
* 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 "ike_auth_lifetime.h"
#include <time.h>
#include <daemon.h>
#include <encoding/payloads/notify_payload.h>
typedef struct private_ike_auth_lifetime_t private_ike_auth_lifetime_t;
/**
* Private members of a ike_auth_lifetime_t task.
*/
struct private_ike_auth_lifetime_t {
/**
* Public methods and task_t interface.
*/
ike_auth_lifetime_t public;
/**
* Assigned IKE_SA.
*/
ike_sa_t *ike_sa;
};
/**
* add the AUTH_LIFETIME notify to the message
*/
static void add_auth_lifetime(private_ike_auth_lifetime_t *this, message_t *message)
{
chunk_t chunk;
u_int32_t lifetime;
lifetime = this->ike_sa->get_statistic(this->ike_sa, STAT_REAUTH);
if (lifetime)
{
lifetime -= time_monotonic(NULL);
chunk = chunk_from_thing(lifetime);
*(u_int32_t*)chunk.ptr = htonl(lifetime);
message->add_notify(message, FALSE, AUTH_LIFETIME, chunk);
}
}
/**
* read notifys from message and evaluate them
*/
static void process_payloads(private_ike_auth_lifetime_t *this, message_t *message)
{
notify_payload_t *notify;
chunk_t data;
u_int32_t lifetime;
notify = message->get_notify(message, AUTH_LIFETIME);
if (notify)
{
data = notify->get_notification_data(notify);
lifetime = ntohl(*(u_int32_t*)data.ptr);
this->ike_sa->set_auth_lifetime(this->ike_sa, lifetime);
}
}
METHOD(task_t, build_i, status_t,
private_ike_auth_lifetime_t *this, message_t *message)
{
if (message->get_exchange_type(message) == INFORMATIONAL)
{
add_auth_lifetime(this, message);
return SUCCESS;
}
return NEED_MORE;
}
METHOD(task_t, process_r, status_t,
private_ike_auth_lifetime_t *this, message_t *message)
{
if (message->get_exchange_type(message) == INFORMATIONAL)
{
process_payloads(this, message);
return SUCCESS;
}
return NEED_MORE;
}
METHOD(task_t, build_r, status_t,
private_ike_auth_lifetime_t *this, message_t *message)
{
if (message->get_exchange_type(message) == IKE_AUTH &&
this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
{
add_auth_lifetime(this, message);
return SUCCESS;
}
return NEED_MORE;
}
METHOD(task_t, process_i, status_t,
private_ike_auth_lifetime_t *this, message_t *message)
{
if (message->get_exchange_type(message) == IKE_AUTH &&
this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
{
process_payloads(this, message);
return SUCCESS;
}
return NEED_MORE;
}
METHOD(task_t, get_type, task_type_t,
private_ike_auth_lifetime_t *this)
{
return TASK_IKE_AUTH_LIFETIME;
}
METHOD(task_t, migrate, void,
private_ike_auth_lifetime_t *this, ike_sa_t *ike_sa)
{
this->ike_sa = ike_sa;
}
METHOD(task_t, destroy, void,
private_ike_auth_lifetime_t *this)
{
free(this);
}
/*
* Described in header.
*/
ike_auth_lifetime_t *ike_auth_lifetime_create(ike_sa_t *ike_sa, bool initiator)
{
private_ike_auth_lifetime_t *this;
INIT(this,
.public = {
.task = {
.get_type = _get_type,
.migrate = _migrate,
.destroy = _destroy,
},
},
.ike_sa = ike_sa,
);
if (initiator)
{
this->public.task.build = _build_i;
this->public.task.process = _process_i;
}
else
{
this->public.task.build = _build_r;
this->public.task.process = _process_r;
}
return &this->public;
}
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