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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 <stdlib.h>
#include "dpd_timeout_job.h"
#include <sa/ike_sa.h>
#include <daemon.h>
typedef struct private_dpd_timeout_job_t private_dpd_timeout_job_t;
/**
* Private data
*/
struct private_dpd_timeout_job_t {
/**
* public dpd_timeout_job_t interface
*/
dpd_timeout_job_t public;
/**
* IKE_SA identifier
*/
ike_sa_id_t *ike_sa_id;
/**
* Timestamp of first DPD check
*/
time_t check;
};
METHOD(job_t, destroy, void,
private_dpd_timeout_job_t *this)
{
this->ike_sa_id->destroy(this->ike_sa_id);
free(this);
}
METHOD(job_t, execute, job_requeue_t,
private_dpd_timeout_job_t *this)
{
time_t use_time, current;
enumerator_t *enumerator;
child_sa_t *child_sa;
ike_sa_t *ike_sa;
ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
this->ike_sa_id);
if (ike_sa)
{
if (ike_sa->get_state(ike_sa) == IKE_PASSIVE)
{
charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
return JOB_REQUEUE_NONE;
}
use_time = ike_sa->get_statistic(ike_sa, STAT_INBOUND);
enumerator = ike_sa->create_child_sa_enumerator(ike_sa);
while (enumerator->enumerate(enumerator, &child_sa))
{
child_sa->get_usestats(child_sa, TRUE, ¤t, NULL, NULL);
use_time = max(use_time, current);
}
enumerator->destroy(enumerator);
/* check if no incoming packet during timeout, reestablish SA */
if (use_time < this->check)
{
DBG1(DBG_JOB, "DPD check timed out, enforcing DPD action");
charon->bus->alert(charon->bus, ALERT_RETRANSMIT_SEND_TIMEOUT, NULL);
charon->bus->ike_updown(charon->bus, ike_sa, FALSE);
ike_sa->reestablish(ike_sa);
charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager,
ike_sa);
}
else
{
charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
}
}
return JOB_REQUEUE_NONE;
}
METHOD(job_t, get_priority, job_priority_t,
private_dpd_timeout_job_t *this)
{
return JOB_PRIO_HIGH;
}
/*
* Described in header
*/
dpd_timeout_job_t *dpd_timeout_job_create(ike_sa_id_t *ike_sa_id)
{
private_dpd_timeout_job_t *this;
INIT(this,
.public = {
.job_interface = {
.execute = _execute,
.get_priority = _get_priority,
.destroy = _destroy,
},
},
.ike_sa_id = ike_sa_id->clone(ike_sa_id),
.check = time_monotonic(NULL),
);
return &this->public;
}
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