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/*
* Copyright (C) 2015 Tobias Brunner
* Hochschule fuer Technik Rapperswil
*
* 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 "adopt_children_job.h"
#include <daemon.h>
#include <hydra.h>
#include <collections/array.h>
typedef struct private_adopt_children_job_t private_adopt_children_job_t;
/**
* Private data of an adopt_children_job_t object.
*/
struct private_adopt_children_job_t {
/**
* Public adopt_children_job_t interface.
*/
adopt_children_job_t public;
/**
* IKE_SA id to adopt children from
*/
ike_sa_id_t *id;
/**
* Tasks queued for execution
*/
array_t *tasks;
};
METHOD(job_t, destroy, void,
private_adopt_children_job_t *this)
{
array_destroy_offset(this->tasks, offsetof(task_t, destroy));
this->id->destroy(this->id);
free(this);
}
METHOD(job_t, execute, job_requeue_t,
private_adopt_children_job_t *this)
{
identification_t *my_id, *other_id, *xauth;
host_t *me, *other, *vip;
peer_cfg_t *cfg;
linked_list_t *children, *vips;
enumerator_t *enumerator, *subenum;
ike_sa_id_t *id;
ike_sa_t *ike_sa;
child_sa_t *child_sa;
ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager, this->id);
if (ike_sa)
{
/* get what we need from new SA */
me = ike_sa->get_my_host(ike_sa);
me = me->clone(me);
other = ike_sa->get_other_host(ike_sa);
other = other->clone(other);
my_id = ike_sa->get_my_id(ike_sa);
my_id = my_id->clone(my_id);
other_id = ike_sa->get_other_id(ike_sa);
other_id = other_id->clone(other_id);
xauth = ike_sa->get_other_eap_id(ike_sa);
xauth = xauth->clone(xauth);
cfg = ike_sa->get_peer_cfg(ike_sa);
cfg->get_ref(cfg);
charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
/* find old SA to adopt children and virtual IPs from */
vips = linked_list_create();
children = linked_list_create();
enumerator = charon->ike_sa_manager->create_id_enumerator(
charon->ike_sa_manager, my_id, xauth,
other->get_family(other));
while (enumerator->enumerate(enumerator, &id))
{
if (id->equals(id, this->id))
{ /* not from self */
continue;
}
ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager, id);
if (ike_sa)
{
if ((ike_sa->get_state(ike_sa) == IKE_ESTABLISHED ||
ike_sa->get_state(ike_sa) == IKE_PASSIVE) &&
me->equals(me, ike_sa->get_my_host(ike_sa)) &&
other->equals(other, ike_sa->get_other_host(ike_sa)) &&
other_id->equals(other_id, ike_sa->get_other_id(ike_sa)) &&
cfg->equals(cfg, ike_sa->get_peer_cfg(ike_sa)))
{
subenum = ike_sa->create_child_sa_enumerator(ike_sa);
while (subenum->enumerate(subenum, &child_sa))
{
ike_sa->remove_child_sa(ike_sa, subenum);
children->insert_last(children, child_sa);
}
subenum->destroy(subenum);
subenum = ike_sa->create_virtual_ip_enumerator(ike_sa, FALSE);
while (subenum->enumerate(subenum, &vip))
{
vips->insert_last(vips, vip->clone(vip));
}
subenum->destroy(subenum);
/* this does not release the addresses, which is good, but
* it does trigger an assign_vips(FALSE) event, so we also
* trigger one below */
ike_sa->clear_virtual_ips(ike_sa, FALSE);
if (children->get_count(children) || vips->get_count(vips))
{
DBG1(DBG_IKE, "detected reauth of existing IKE_SA, "
"adopting %d children and %d virtual IPs",
children->get_count(children), vips->get_count(vips));
}
ike_sa->set_state(ike_sa, IKE_DELETING);
charon->bus->ike_updown(charon->bus, ike_sa, FALSE);
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 (children->get_count(children) || vips->get_count(vips))
{
break;
}
}
}
enumerator->destroy(enumerator);
me->destroy(me);
other->destroy(other);
my_id->destroy(my_id);
other_id->destroy(other_id);
xauth->destroy(xauth);
cfg->destroy(cfg);
if (children->get_count(children) || vips->get_count(vips))
{
/* adopt children by new SA */
ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
this->id);
if (ike_sa)
{
while (children->remove_last(children,
(void**)&child_sa) == SUCCESS)
{
ike_sa->add_child_sa(ike_sa, child_sa);
}
if (vips->get_count(vips))
{
while (vips->remove_first(vips, (void**)&vip) == SUCCESS)
{
ike_sa->add_virtual_ip(ike_sa, FALSE, vip);
vip->destroy(vip);
}
charon->bus->assign_vips(charon->bus, ike_sa, TRUE);
}
charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
}
}
children->destroy_offset(children, offsetof(child_sa_t, destroy));
/* FIXME: If we still have addresses here it means we weren't able to
* find the new SA anymore (while not very likely during a proper
* reauthentication, this theoretically could happen because the SA is
* not locked while we search for the old one). So the addresses here
* should be released properly to avoid leaking these leases. This is
* currently not possible, though, due to the changed interface of
* release_address(), which now takes a complete IKE_SA object. */
vips->destroy_offset(vips, offsetof(host_t, destroy));
if (array_count(this->tasks))
{
ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
this->id);
if (ike_sa)
{
task_t *task;
while (array_remove(this->tasks, ARRAY_HEAD, &task))
{
task->migrate(task, ike_sa);
ike_sa->queue_task(ike_sa, task);
}
if (ike_sa->initiate(ike_sa, NULL, 0, NULL, NULL) == 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);
}
}
}
}
return JOB_REQUEUE_NONE;
}
METHOD(job_t, get_priority, job_priority_t,
private_adopt_children_job_t *this)
{
return JOB_PRIO_HIGH;
}
METHOD(adopt_children_job_t, queue_task, void,
private_adopt_children_job_t *this, task_t *task)
{
array_insert_create(&this->tasks, ARRAY_TAIL, task);
}
/**
* See header
*/
adopt_children_job_t *adopt_children_job_create(ike_sa_id_t *id)
{
private_adopt_children_job_t *this;
INIT(this,
.public = {
.job_interface = {
.execute = _execute,
.get_priority = _get_priority,
.destroy = _destroy,
},
.queue_task = _queue_task,
},
.id = id->clone(id),
);
return &this->public;
}
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