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/*
* 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 "quick_delete.h"
#include <daemon.h>
#include <encoding/payloads/delete_payload.h>
typedef struct private_quick_delete_t private_quick_delete_t;
/**
* Private members of a quick_delete_t task.
*/
struct private_quick_delete_t {
/**
* Public methods and task_t interface.
*/
quick_delete_t public;
/**
* Assigned IKE_SA.
*/
ike_sa_t *ike_sa;
/**
* Are we the initiator?
*/
bool initiator;
/**
* Protocol of CHILD_SA to delete
*/
protocol_id_t protocol;
/**
* Inbound SPI of CHILD_SA to delete
*/
u_int32_t spi;
/**
* Send delete even if SA does not exist
*/
bool force;
/**
* SA already expired?
*/
bool expired;
};
/**
* Delete the specified CHILD_SA, if found
*/
static bool delete_child(private_quick_delete_t *this,
protocol_id_t protocol, u_int32_t spi)
{
u_int64_t bytes_in, bytes_out;
child_sa_t *child_sa;
bool rekeyed;
child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol, spi, TRUE);
if (!child_sa)
{ /* fallback and check for outbound SA */
child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol, spi, FALSE);
if (!child_sa)
{
return FALSE;
}
this->spi = spi = child_sa->get_spi(child_sa, TRUE);
}
rekeyed = child_sa->get_state(child_sa) == CHILD_REKEYING;
child_sa->set_state(child_sa, CHILD_DELETING);
if (this->expired)
{
DBG0(DBG_IKE, "closing expired CHILD_SA %s{%d} "
"with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
ntohl(child_sa->get_spi(child_sa, TRUE)),
ntohl(child_sa->get_spi(child_sa, FALSE)),
child_sa->get_traffic_selectors(child_sa, TRUE),
child_sa->get_traffic_selectors(child_sa, FALSE));
}
else
{
child_sa->get_usestats(child_sa, TRUE, NULL, &bytes_in);
child_sa->get_usestats(child_sa, FALSE, NULL, &bytes_out);
DBG0(DBG_IKE, "closing CHILD_SA %s{%d} with SPIs "
"%.8x_i (%llu bytes) %.8x_o (%llu bytes) and TS %#R=== %#R",
child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
ntohl(child_sa->get_spi(child_sa, TRUE)), bytes_in,
ntohl(child_sa->get_spi(child_sa, FALSE)), bytes_out,
child_sa->get_traffic_selectors(child_sa, TRUE),
child_sa->get_traffic_selectors(child_sa, FALSE));
}
if (!rekeyed)
{
charon->bus->child_updown(charon->bus, child_sa, FALSE);
}
this->ike_sa->destroy_child_sa(this->ike_sa, protocol, spi);
/* TODO-IKEv1: handle close action? */
return TRUE;
}
METHOD(task_t, build_i, status_t,
private_quick_delete_t *this, message_t *message)
{
if (delete_child(this, this->protocol, this->spi) || this->force)
{
delete_payload_t *delete_payload;
DBG1(DBG_IKE, "sending DELETE for %N CHILD_SA with SPI %.8x",
protocol_id_names, this->protocol, ntohl(this->spi));
delete_payload = delete_payload_create(DELETE_V1, PROTO_ESP);
delete_payload->add_spi(delete_payload, this->spi);
message->add_payload(message, &delete_payload->payload_interface);
return SUCCESS;
}
this->ike_sa->flush_queue(this->ike_sa, TASK_QUEUE_ACTIVE);
return ALREADY_DONE;
}
METHOD(task_t, process_i, status_t,
private_quick_delete_t *this, message_t *message)
{
return FAILED;
}
METHOD(task_t, process_r, status_t,
private_quick_delete_t *this, message_t *message)
{
enumerator_t *payloads, *spis;
payload_t *payload;
delete_payload_t *delete_payload;
protocol_id_t protocol;
u_int32_t spi;
payloads = message->create_payload_enumerator(message);
while (payloads->enumerate(payloads, &payload))
{
if (payload->get_type(payload) == DELETE_V1)
{
delete_payload = (delete_payload_t*)payload;
protocol = delete_payload->get_protocol_id(delete_payload);
if (protocol != PROTO_ESP && protocol != PROTO_AH)
{
continue;
}
spis = delete_payload->create_spi_enumerator(delete_payload);
while (spis->enumerate(spis, &spi))
{
DBG1(DBG_IKE, "received DELETE for %N CHILD_SA with SPI %.8x",
protocol_id_names, protocol, ntohl(spi));
if (!delete_child(this, protocol, spi))
{
DBG1(DBG_IKE, "CHILD_SA not found, ignored");
continue;
}
}
spis->destroy(spis);
}
}
payloads->destroy(payloads);
return SUCCESS;
}
METHOD(task_t, build_r, status_t,
private_quick_delete_t *this, message_t *message)
{
return FAILED;
}
METHOD(task_t, get_type, task_type_t,
private_quick_delete_t *this)
{
return TASK_QUICK_DELETE;
}
METHOD(task_t, migrate, void,
private_quick_delete_t *this, ike_sa_t *ike_sa)
{
this->ike_sa = ike_sa;
}
METHOD(task_t, destroy, void,
private_quick_delete_t *this)
{
free(this);
}
/*
* Described in header.
*/
quick_delete_t *quick_delete_create(ike_sa_t *ike_sa, protocol_id_t protocol,
u_int32_t spi, bool force, bool expired)
{
private_quick_delete_t *this;
INIT(this,
.public = {
.task = {
.get_type = _get_type,
.migrate = _migrate,
.destroy = _destroy,
},
},
.ike_sa = ike_sa,
.protocol = protocol,
.spi = spi,
.force = force,
.expired = expired,
);
if (protocol != PROTO_NONE)
{
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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