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/**
* @file incoming_packet_job.h
*
* @brief Implementation of incoming_packet_job_t.
*
*/
/*
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* 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 "incoming_packet_job.h"
#include <daemon.h>
#include <queues/jobs/delete_half_open_ike_sa_job.h>
typedef struct private_incoming_packet_job_t private_incoming_packet_job_t;
/**
* Private data of an incoming_packet_job_t Object
*/
struct private_incoming_packet_job_t {
/**
* public incoming_packet_job_t interface
*/
incoming_packet_job_t public;
/**
* Assigned packet
*/
packet_t *packet;
/**
* logger
*/
logger_t *logger;
};
/**
* Implements job_t.get_type.
*/
static job_type_t get_type(private_incoming_packet_job_t *this)
{
return INCOMING_PACKET;
}
/**
* send a notify back to the sender
*/
static void send_notify_response(private_incoming_packet_job_t *this,
message_t *request,
notify_type_t type)
{
notify_payload_t *notify;
message_t *response;
host_t *src, *dst;
packet_t *packet;
ike_sa_id_t *ike_sa_id;
ike_sa_id = request->get_ike_sa_id(request);
ike_sa_id = ike_sa_id->clone(ike_sa_id);
ike_sa_id->switch_initiator(ike_sa_id);
response = message_create();
dst = request->get_source(request);
src = request->get_destination(request);
response->set_source(response, src->clone(src));
response->set_destination(response, dst->clone(dst));
response->set_exchange_type(response, request->get_exchange_type(request));
response->set_request(response, FALSE);
response->set_message_id(response, 0);
response->set_ike_sa_id(response, ike_sa_id);
notify = notify_payload_create_from_protocol_and_type(PROTO_NONE, type);
response->add_payload(response, (payload_t *)notify);
/* generation may fail, as most messages need a crypter/signer.
* TODO: Use transforms implementing the "NULL" algorithm */
if (response->generate(response, NULL, NULL, &packet) != SUCCESS)
{
response->destroy(response);
return;
}
this->logger->log(this->logger, CONTROL, "sending %s notify",
mapping_find(notify_type_m, type));
charon->send_queue->add(charon->send_queue, packet);
response->destroy(response);
ike_sa_id->destroy(ike_sa_id);
return;
}
/**
* Implementation of job_t.execute.
*/
static status_t execute(private_incoming_packet_job_t *this)
{
message_t *message;
ike_sa_t *ike_sa;
ike_sa_id_t *ike_sa_id;
status_t status;
host_t *src, *dst;
message = message_create_from_packet(this->packet->clone(this->packet));
src = message->get_source(message);
dst = message->get_destination(message);
this->logger->log(this->logger, CONTROL, "received packet: from %s:%d to %s:%d",
src->get_string(src), src->get_port(src),
dst->get_string(dst), dst->get_port(dst));
status = message->parse_header(message);
if (status != SUCCESS)
{
this->logger->log(this->logger, ERROR, "received message with invalid IKE header, ignored");
message->destroy(message);
return DESTROY_ME;
}
if ((message->get_major_version(message) != IKE_MAJOR_VERSION) ||
(message->get_minor_version(message) != IKE_MINOR_VERSION))
{
this->logger->log(this->logger, ERROR,
"received a packet with IKE version %d.%d, not supported",
message->get_major_version(message),
message->get_minor_version(message));
if ((message->get_exchange_type(message) == IKE_SA_INIT) && (message->get_request(message)))
{
send_notify_response(this, message, INVALID_MAJOR_VERSION);
}
message->destroy(message);
return DESTROY_ME;
}
ike_sa_id = message->get_ike_sa_id(message);
ike_sa_id = ike_sa_id->clone(ike_sa_id);
ike_sa_id->switch_initiator(ike_sa_id);
ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager, ike_sa_id);
if (ike_sa == NULL)
{
this->logger->log(this->logger, ERROR,
"received packet with SPIs %llx:%llx, but no such IKE_SA",
ike_sa_id->get_initiator_spi(ike_sa_id),
ike_sa_id->get_responder_spi(ike_sa_id));
if (message->get_request(message))
{
send_notify_response(this, message, INVALID_IKE_SPI);
}
ike_sa_id->destroy(ike_sa_id);
message->destroy(message);
return DESTROY_ME;
}
status = ike_sa->process_message(ike_sa, message);
if (status == 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);
}
ike_sa_id->destroy(ike_sa_id);
message->destroy(message);
return DESTROY_ME;
}
/**
* Implements incoming_packet_job_t.get_packet.
*/
static packet_t* get_packet(private_incoming_packet_job_t *this)
{
return this->packet;
}
/**
* Implements job_t.destroy.
*/
static void destroy(private_incoming_packet_job_t *this)
{
this->packet->destroy(this->packet);
free(this);
}
/*
* Described in header
*/
incoming_packet_job_t *incoming_packet_job_create(packet_t *packet)
{
private_incoming_packet_job_t *this = malloc_thing(private_incoming_packet_job_t);
/* interface functions */
this->public.job_interface.get_type = (job_type_t (*) (job_t *)) get_type;
this->public.job_interface.execute = (status_t (*) (job_t *)) execute;
this->public.job_interface.destroy = (void(*)(job_t*))destroy;
this->public.get_packet = (packet_t*(*)(incoming_packet_job_t*)) get_packet;
/* private variables */
this->packet = packet;
this->logger = logger_manager->get_logger(logger_manager, WORKER);
return &(this->public);
}
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