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/*
* Copyright (C) 2006 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 "rekey_ike_sa_job.h"
#include <daemon.h>
typedef struct private_rekey_ike_sa_job_t private_rekey_ike_sa_job_t;
/**
* Private data of an rekey_ike_sa_job_t object.
*/
struct private_rekey_ike_sa_job_t {
/**
* Public rekey_ike_sa_job_t interface.
*/
rekey_ike_sa_job_t public;
/**
* ID of the IKE_SA to rekey
*/
ike_sa_id_t *ike_sa_id;
/**
* force reauthentication of the peer (full IKE_SA setup)
*/
bool reauth;
};
METHOD(job_t, destroy, void,
private_rekey_ike_sa_job_t *this)
{
this->ike_sa_id->destroy(this->ike_sa_id);
free(this);
}
/**
* Check if we should delay a reauth, and by how many seconds
*/
static u_int32_t get_retry_delay(ike_sa_t *ike_sa)
{
enumerator_t *enumerator;
child_sa_t *child_sa;
u_int32_t retry = 0;
/* avoid reauth collisions for certain IKE_SA/CHILD_SA states */
if (ike_sa->get_state(ike_sa) != IKE_ESTABLISHED)
{
retry = RETRY_INTERVAL - (random() % RETRY_JITTER);
DBG1(DBG_IKE, "unable to reauthenticate in %N state, delaying for %us",
ike_sa_state_names, ike_sa->get_state(ike_sa), retry);
}
else
{
enumerator = ike_sa->create_child_sa_enumerator(ike_sa);
while (enumerator->enumerate(enumerator, &child_sa))
{
if (child_sa->get_state(child_sa) != CHILD_INSTALLED &&
child_sa->get_state(child_sa) != CHILD_REKEYED)
{
retry = RETRY_INTERVAL - (random() % RETRY_JITTER);
DBG1(DBG_IKE, "unable to reauthenticate in CHILD_SA %N state, "
"delaying for %us", child_sa_state_names,
child_sa->get_state(child_sa), retry);
break;
}
}
enumerator->destroy(enumerator);
}
return retry;
}
METHOD(job_t, execute, job_requeue_t,
private_rekey_ike_sa_job_t *this)
{
ike_sa_t *ike_sa;
status_t status = SUCCESS;
u_int32_t retry = 0;
ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
this->ike_sa_id);
if (ike_sa == NULL)
{
DBG2(DBG_JOB, "IKE_SA to rekey not found");
}
else
{
if (this->reauth)
{
retry = get_retry_delay(ike_sa);
if (!retry)
{
status = ike_sa->reauth(ike_sa);
}
}
else
{
status = ike_sa->rekey(ike_sa);
}
if (status == DESTROY_ME)
{
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);
}
}
if (retry)
{
return JOB_RESCHEDULE(retry);
}
return JOB_REQUEUE_NONE;
}
METHOD(job_t, get_priority, job_priority_t,
private_rekey_ike_sa_job_t *this)
{
return JOB_PRIO_MEDIUM;
}
/*
* Described in header
*/
rekey_ike_sa_job_t *rekey_ike_sa_job_create(ike_sa_id_t *ike_sa_id, bool reauth)
{
private_rekey_ike_sa_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),
.reauth = reauth,
);
return &(this->public);
}
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