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/**
* @file ike_sa_established.c
*
* @brief Implementation of ike_sa_established_t.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, 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 "ike_sa_established.h"
#include <daemon.h>
#include <encoding/payloads/delete_payload.h>
typedef struct private_ike_sa_established_t private_ike_sa_established_t;
/**
* Private data of a ike_sa_established_t object.
*/
struct private_ike_sa_established_t {
/**
* methods of the state_t interface
*/
ike_sa_established_t public;
/**
* Assigned IKE_SA.
*/
protected_ike_sa_t *ike_sa;
/**
* Assigned logger. Use logger of IKE_SA.
*/
logger_t *logger;
/**
* Process a notify payload
*
* @param this calling object
* @param notify_payload notify payload
* @param response response message of type INFORMATIONAL
*
* - SUCCESS
* - FAILED
* - DELETE_ME
*/
status_t (*process_notify_payload) (private_ike_sa_established_t *this, notify_payload_t *notify_payload,message_t *response);
};
/**
* Implements state_t.get_state
*/
static status_t process_message(private_ike_sa_established_t *this, message_t *message)
{
delete_payload_t *delete_request = NULL;
ike_sa_id_t *ike_sa_id;
iterator_t *payloads;
message_t *response;
crypter_t *crypter;
signer_t *signer;
status_t status;
if (message->get_exchange_type(message) != INFORMATIONAL)
{
this->logger->log(this->logger, ERROR | LEVEL1, "Message of type %s not supported in state ike_sa_established",
mapping_find(exchange_type_m,message->get_exchange_type(message)));
return FAILED;
}
if (!message->get_request(message))
{
this->logger->log(this->logger, ERROR | LEVEL1, "INFORMATIONAL responses not handled in state ike_sa_established");
return FAILED;
}
ike_sa_id = this->ike_sa->public.get_id(&(this->ike_sa->public));
/* get signer for verification and crypter for decryption */
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 = message->parse_body(message, crypter, signer);
if (status != SUCCESS)
{
this->logger->log(this->logger, AUDIT, "INFORMATIONAL request decryption failed. Ignoring message");
return status;
}
/* build empty INFORMATIONAL message */
this->ike_sa->build_message(this->ike_sa, INFORMATIONAL, FALSE, &response);
payloads = message->get_payload_iterator(message);
while (payloads->has_next(payloads))
{
payload_t *payload;
payloads->current(payloads, (void**)&payload);
switch (payload->get_type(payload))
{
case NOTIFY:
{
notify_payload_t *notify_payload = (notify_payload_t *) payload;
/* handle the notify directly, abort if no further processing required */
status = this->process_notify_payload(this, notify_payload,response);
if (status != SUCCESS)
{
payloads->destroy(payloads);
response->destroy(response);
return status;
}
}
case DELETE:
{
delete_request = (delete_payload_t *) payload;
break;
}
default:
{
this->logger->log(this->logger, ERROR|LEVEL1, "Ignoring Payload %s (%d)",
mapping_find(payload_type_m, payload->get_type(payload)), payload->get_type(payload));
break;
}
}
}
/* iterator can be destroyed */
payloads->destroy(payloads);
if (delete_request)
{
if (delete_request->get_protocol_id(delete_request) == PROTO_IKE)
{
this->logger->log(this->logger, AUDIT, "DELETE request for IKE_SA received");
response->destroy(response);
return DELETE_ME;
}
else
{
this->logger->log(this->logger, AUDIT, "DELETE request for CHILD_SA received. Ignored");
response->destroy(response);
return SUCCESS;
}
}
status = this->ike_sa->send_response(this->ike_sa, response);
/* message can now be sent (must not be destroyed) */
if (status != SUCCESS)
{
this->logger->log(this->logger, AUDIT, "Unable to send INFORMATIONAL reply");
response->destroy(response);
return FAILED;
}
return SUCCESS;
}
/**
* Implementation of private_ike_sa_established_t.process_notify_payload;
*/
static status_t process_notify_payload (private_ike_sa_established_t *this, notify_payload_t *notify_payload, message_t *response)
{
notify_message_type_t notify_message_type = notify_payload->get_notify_message_type(notify_payload);
this->logger->log(this->logger, CONTROL|LEVEL1, "Process notify type %s for protocol %s",
mapping_find(notify_message_type_m, notify_message_type),
mapping_find(protocol_id_m, notify_payload->get_protocol_id(notify_payload)));
switch (notify_message_type)
{
default:
{
this->logger->log(this->logger, AUDIT, "INFORMATIONAL request contained an unknown notify (%d), ignored.", notify_message_type);
}
}
return SUCCESS;
}
/**
* Implementation of state_t.get_state.
*/
static ike_sa_state_t get_state(private_ike_sa_established_t *this)
{
return IKE_SA_ESTABLISHED;
}
/**
* Implementation of state_t.get_state
*/
static void destroy(private_ike_sa_established_t *this)
{
free(this);
}
/*
* Described in header.
*/
ike_sa_established_t *ike_sa_established_create(protected_ike_sa_t *ike_sa)
{
private_ike_sa_established_t *this = malloc_thing(private_ike_sa_established_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 functions */
this->process_notify_payload = process_notify_payload;
/* private data */
this->ike_sa = ike_sa;
this->logger = logger_manager->get_logger(logger_manager, IKE_SA);
return &(this->public);
}
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