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/*
* Copyright (C) 2015 Tobias Brunner
* HSR Hochschule fuer Technik Rapperswil
*
* Copyright (C) 2011 Martin Willi
* Copyright (C) 2011 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 "isakmp_delete.h"
#include <daemon.h>
#include <encoding/payloads/delete_payload.h>
typedef struct private_isakmp_delete_t private_isakmp_delete_t;
/**
* Private members of a isakmp_delete_t task.
*/
struct private_isakmp_delete_t {
/**
* Public methods and task_t interface.
*/
isakmp_delete_t public;
/**
* Assigned IKE_SA.
*/
ike_sa_t *ike_sa;
};
METHOD(task_t, build_i, status_t,
private_isakmp_delete_t *this, message_t *message)
{
delete_payload_t *delete_payload;
ike_sa_id_t *id;
DBG0(DBG_IKE, "deleting IKE_SA %s[%d] between %H[%Y]...%H[%Y]",
this->ike_sa->get_name(this->ike_sa),
this->ike_sa->get_unique_id(this->ike_sa),
this->ike_sa->get_my_host(this->ike_sa),
this->ike_sa->get_my_id(this->ike_sa),
this->ike_sa->get_other_host(this->ike_sa),
this->ike_sa->get_other_id(this->ike_sa));
delete_payload = delete_payload_create(PLV1_DELETE, PROTO_IKE);
id = this->ike_sa->get_id(this->ike_sa);
delete_payload->set_ike_spi(delete_payload, id->get_initiator_spi(id),
id->get_responder_spi(id));
message->add_payload(message, (payload_t*)delete_payload);
DBG1(DBG_IKE, "sending DELETE for IKE_SA %s[%d]",
this->ike_sa->get_name(this->ike_sa),
this->ike_sa->get_unique_id(this->ike_sa));
this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
return SUCCESS;
}
METHOD(task_t, process_i, status_t,
private_isakmp_delete_t *this, message_t *message)
{
return FAILED;
}
METHOD(task_t, process_r, status_t,
private_isakmp_delete_t *this, message_t *message)
{
enumerator_t *payloads;
payload_t *payload;
delete_payload_t *delete_payload;
ike_sa_id_t *id;
uint64_t spi_i, spi_r;
bool found = FALSE;
/* some peers send DELETE payloads for other IKE_SAs, e.g. those for expired
* ones after a rekeyeing, make sure the SPIs match */
id = this->ike_sa->get_id(this->ike_sa);
payloads = message->create_payload_enumerator(message);
while (payloads->enumerate(payloads, &payload))
{
if (payload->get_type(payload) == PLV1_DELETE)
{
delete_payload = (delete_payload_t*)payload;
if (!delete_payload->get_ike_spi(delete_payload, &spi_i, &spi_r))
{
continue;
}
if (id->get_initiator_spi(id) == spi_i &&
id->get_responder_spi(id) == spi_r)
{
found = TRUE;
break;
}
}
}
payloads->destroy(payloads);
if (!found)
{
DBG1(DBG_IKE, "received DELETE for different IKE_SA, ignored");
return SUCCESS;
}
DBG1(DBG_IKE, "received DELETE for IKE_SA %s[%d]",
this->ike_sa->get_name(this->ike_sa),
this->ike_sa->get_unique_id(this->ike_sa));
DBG0(DBG_IKE, "deleting IKE_SA %s[%d] between %H[%Y]...%H[%Y]",
this->ike_sa->get_name(this->ike_sa),
this->ike_sa->get_unique_id(this->ike_sa),
this->ike_sa->get_my_host(this->ike_sa),
this->ike_sa->get_my_id(this->ike_sa),
this->ike_sa->get_other_host(this->ike_sa),
this->ike_sa->get_other_id(this->ike_sa));
if (this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
{
this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
this->ike_sa->reestablish(this->ike_sa);
}
this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
return DESTROY_ME;
}
METHOD(task_t, build_r, status_t,
private_isakmp_delete_t *this, message_t *message)
{
return FAILED;
}
METHOD(task_t, get_type, task_type_t,
private_isakmp_delete_t *this)
{
return TASK_ISAKMP_DELETE;
}
METHOD(task_t, migrate, void,
private_isakmp_delete_t *this, ike_sa_t *ike_sa)
{
this->ike_sa = ike_sa;
}
METHOD(task_t, destroy, void,
private_isakmp_delete_t *this)
{
free(this);
}
/*
* Described in header.
*/
isakmp_delete_t *isakmp_delete_create(ike_sa_t *ike_sa, bool initiator)
{
private_isakmp_delete_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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