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/**
* @file delete_child_sa_requested.c
*
* @brief State after a CREATE_CHILD_SA request was sent.
*
*/
/*
* 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 <string.h>
#include "delete_child_sa_requested.h"
#include <sa/child_sa.h>
#include <sa/states/delete_ike_sa_requested.h>
#include <sa/states/ike_sa_established.h>
#include <encoding/payloads/notify_payload.h>
#include <encoding/payloads/delete_payload.h>
#include <utils/logger_manager.h>
typedef struct private_delete_child_sa_requested_t private_delete_child_sa_requested_t;
/**
* Private data of a delete_child_sa_requested_t object.
*/
struct private_delete_child_sa_requested_t {
/**
* Public interface of delete_child_sa_requested_t.
*/
delete_child_sa_requested_t public;
/**
* Assigned IKE_SA.
*/
protected_ike_sa_t *ike_sa;
/**
* Assigned logger.
*
* Is logger of ike_sa!
*/
logger_t *logger;
};
/**
* Process the response
*/
static status_t process_message(private_delete_child_sa_requested_t *this, message_t *response)
{
ike_sa_id_t *ike_sa_id;
crypter_t *crypter;
signer_t *signer;
status_t status;
iterator_t *iterator;
payload_t *payload;
delete_payload_t *delete_response;
if (response->get_exchange_type(response) != INFORMATIONAL)
{
this->logger->log(this->logger, ERROR | LEVEL1, "Message of type %s not supported in state delete_child_sa_requested",
mapping_find(exchange_type_m, response->get_exchange_type(response)));
return FAILED;
}
if (response->get_request(response))
{
this->logger->log(this->logger, ERROR | LEVEL1, "INFORMATIONAL requests not allowed state delete_child_sa_requested");
/* TODO: our state implementation currently can not handle incoming requests cleanly here.
* If a request comes in before an outstanding reply, we can not handle it cleanly.
* Currently, we create a ESTABLISHED state and let it process the message... But we
* need changes in the whole state mechanism.
*/
state_t *state = (state_t*)ike_sa_established_create(this->ike_sa);
state->process_message(state, response);
state->destroy(state);
return SUCCESS;
}
/* get signer for verification and crypter for decryption */
ike_sa_id = this->ike_sa->public.get_id(&this->ike_sa->public);
if (!ike_sa_id->is_initiator(ike_sa_id))
{
crypter = this->ike_sa->get_crypter_initiator(this->ike_sa);
signer = this->ike_sa->get_signer_initiator(this->ike_sa);
}
else
{
crypter = this->ike_sa->get_crypter_responder(this->ike_sa);
signer = this->ike_sa->get_signer_responder(this->ike_sa);
}
/* parse incoming message */
status = response->parse_body(response, crypter, signer);
if (status != SUCCESS)
{
this->logger->log(this->logger, AUDIT, "INFORMATIONAL response decryption failed. Ignoring message");
return status;
}
iterator = response->get_payload_iterator(response);
while (iterator->has_next(iterator)) {
iterator->current(iterator, (void**)&payload);
switch (payload->get_type(payload))
{
case DELETE:
delete_response = (delete_payload_t*)payload;
break;
default:
break;
}
}
iterator->destroy(iterator);
if (delete_response)
{
iterator = delete_response->create_spi_iterator(delete_response);
while (iterator->has_next(iterator))
{
u_int32_t spi;
iterator->current(iterator, (void**)&spi);
this->logger->log(this->logger, CONTROL, "DELETE request for CHILD_SA with SPI 0x%x received", spi);
this->ike_sa->destroy_child_sa(this->ike_sa, spi);
}
iterator->destroy(iterator);
}
this->ike_sa->set_last_replied_message_id(this->ike_sa, response->get_message_id(response));
/* create new state */
this->ike_sa->set_new_state(this->ike_sa, (state_t*)ike_sa_established_create(this->ike_sa));
this->public.state_interface.destroy(&this->public.state_interface);
return SUCCESS;
}
/**
* Implements state_t.get_state
*/
static ike_sa_state_t get_state(private_delete_child_sa_requested_t *this)
{
return DELETE_CHILD_SA_REQUESTED;
}
/**
* Implementation of state_t.destroy.
*/
static void destroy(private_delete_child_sa_requested_t *this)
{
free(this);
}
/*
* Described in header.
*/
delete_child_sa_requested_t *delete_child_sa_requested_create(protected_ike_sa_t *ike_sa)
{
private_delete_child_sa_requested_t *this = malloc_thing(private_delete_child_sa_requested_t);
/* interface functions */
this->public.state_interface.process_message = (status_t (*) (state_t *,message_t *)) process_message;
this->public.state_interface.get_state = (ike_sa_state_t (*) (state_t *)) get_state;
this->public.state_interface.destroy = (void (*) (state_t *)) destroy;
/* private data */
this->ike_sa = ike_sa;
this->logger = logger_manager->get_logger(logger_manager, IKE_SA);
return &(this->public);
}
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