212 lines
5.7 KiB
C
212 lines
5.7 KiB
C
/**
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* @file incoming_packet_job.h
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*
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* @brief Implementation of incoming_packet_job_t.
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*
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*/
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/*
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* Copyright (C) 2005-2006 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "incoming_packet_job.h"
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#include <daemon.h>
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#include <queues/jobs/delete_half_open_ike_sa_job.h>
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typedef struct private_incoming_packet_job_t private_incoming_packet_job_t;
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/**
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* Private data of an incoming_packet_job_t Object
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*/
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struct private_incoming_packet_job_t {
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/**
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* public incoming_packet_job_t interface
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*/
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incoming_packet_job_t public;
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/**
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* Assigned packet
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*/
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packet_t *packet;
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/**
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* logger
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*/
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logger_t *logger;
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};
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/**
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* Implements job_t.get_type.
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*/
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static job_type_t get_type(private_incoming_packet_job_t *this)
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{
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return INCOMING_PACKET;
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}
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/**
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* send a notify back to the sender
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*/
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static void send_notify_response(private_incoming_packet_job_t *this,
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message_t *request,
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notify_type_t type)
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{
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notify_payload_t *notify;
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message_t *response;
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host_t *src, *dst;
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packet_t *packet;
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ike_sa_id_t *ike_sa_id;
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ike_sa_id = request->get_ike_sa_id(request);
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ike_sa_id = ike_sa_id->clone(ike_sa_id);
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ike_sa_id->switch_initiator(ike_sa_id);
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response = message_create();
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dst = request->get_source(request);
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src = request->get_destination(request);
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response->set_source(response, src->clone(src));
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response->set_destination(response, dst->clone(dst));
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response->set_exchange_type(response, IKE_SA_INIT);
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response->set_request(response, FALSE);
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response->set_message_id(response, 0);
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response->set_ike_sa_id(response, ike_sa_id);
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notify = notify_payload_create_from_protocol_and_type(PROTO_NONE, type);
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response->add_payload(response, (payload_t *)notify);
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if (response->generate(response, NULL, NULL, &packet) != SUCCESS)
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{
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response->destroy(response);
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return;
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}
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this->logger->log(this->logger, CONTROL, "sending %s notify",
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mapping_find(notify_type_m, type));
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charon->send_queue->add(charon->send_queue, packet);
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response->destroy(response);
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ike_sa_id->destroy(ike_sa_id);
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return;
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}
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/**
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* Implementation of job_t.execute.
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*/
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static status_t execute(private_incoming_packet_job_t *this)
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{
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message_t *message;
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ike_sa_t *ike_sa;
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ike_sa_id_t *ike_sa_id;
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status_t status;
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host_t *src, *dst;
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message = message_create_from_packet(this->packet->clone(this->packet));
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src = message->get_source(message);
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dst = message->get_destination(message);
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this->logger->log(this->logger, CONTROL, "received packet: from %s:%d to %s:%d",
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src->get_string(src), src->get_port(src),
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dst->get_string(dst), dst->get_port(dst));
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status = message->parse_header(message);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "received message with invalid IKE header, ignored");
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message->destroy(message);
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return DESTROY_ME;
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}
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if ((message->get_major_version(message) != IKE_MAJOR_VERSION) ||
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(message->get_minor_version(message) != IKE_MINOR_VERSION))
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{
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this->logger->log(this->logger, ERROR,
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"received a packet with IKE version %d.%d, not supported",
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message->get_major_version(message),
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message->get_minor_version(message));
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if ((message->get_exchange_type(message) == IKE_SA_INIT) && (message->get_request(message)))
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{
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send_notify_response(this, message, INVALID_MAJOR_VERSION);
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}
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message->destroy(message);
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return DESTROY_ME;
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}
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ike_sa_id = message->get_ike_sa_id(message);
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ike_sa_id = ike_sa_id->clone(ike_sa_id);
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ike_sa_id->switch_initiator(ike_sa_id);
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ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager, ike_sa_id);
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if (ike_sa == NULL)
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{
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this->logger->log(this->logger, ERROR,
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"received packet with SPIs %llx:%llx, but no such IKE_SA",
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ike_sa_id->get_initiator_spi(ike_sa_id),
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ike_sa_id->get_responder_spi(ike_sa_id));
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if (message->get_request(message))
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{
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send_notify_response(this, message, INVALID_IKE_SPI);
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}
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ike_sa_id->destroy(ike_sa_id);
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message->destroy(message);
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return DESTROY_ME;
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}
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status = ike_sa->process_message(ike_sa, message);
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if (status == DESTROY_ME)
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{
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charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, ike_sa);
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}
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else
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{
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charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
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}
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ike_sa_id->destroy(ike_sa_id);
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message->destroy(message);
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return DESTROY_ME;
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}
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/**
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* Implements incoming_packet_job_t.get_packet.
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*/
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static packet_t* get_packet(private_incoming_packet_job_t *this)
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{
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return this->packet;
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}
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/**
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* Implements job_t.destroy.
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*/
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static void destroy(private_incoming_packet_job_t *this)
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{
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this->packet->destroy(this->packet);
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free(this);
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}
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/*
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* Described in header
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*/
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incoming_packet_job_t *incoming_packet_job_create(packet_t *packet)
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{
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private_incoming_packet_job_t *this = malloc_thing(private_incoming_packet_job_t);
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/* interface functions */
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this->public.job_interface.get_type = (job_type_t (*) (job_t *)) get_type;
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this->public.job_interface.execute = (status_t (*) (job_t *)) execute;
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this->public.job_interface.destroy = (void(*)(job_t*))destroy;
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this->public.get_packet = (packet_t*(*)(incoming_packet_job_t*)) get_packet;
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/* private variables */
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this->packet = packet;
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this->logger = logger_manager->get_logger(logger_manager, WORKER);
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return &(this->public);
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}
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