199 lines
4.6 KiB
C
199 lines
4.6 KiB
C
/*
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* Copyright (C) 2007 Martin Willi
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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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* $Id$
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*/
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#include "ike_auth_lifetime.h"
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#include <time.h>
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#include <daemon.h>
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#include <encoding/payloads/notify_payload.h>
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typedef struct private_ike_auth_lifetime_t private_ike_auth_lifetime_t;
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/**
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* Private members of a ike_auth_lifetime_t task.
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*/
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struct private_ike_auth_lifetime_t {
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/**
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* Public methods and task_t interface.
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*/
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ike_auth_lifetime_t public;
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/**
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* Assigned IKE_SA.
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*/
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ike_sa_t *ike_sa;
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};
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/**
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* add the AUTH_LIFETIME notify to the message
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*/
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static void add_auth_lifetime(private_ike_auth_lifetime_t *this, message_t *message)
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{
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chunk_t chunk;
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u_int32_t lifetime;
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lifetime = this->ike_sa->get_statistic(this->ike_sa, STAT_REAUTH);
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if (lifetime)
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{
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lifetime -= time(NULL);
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chunk = chunk_from_thing(lifetime);
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*(u_int32_t*)chunk.ptr = htonl(lifetime);
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message->add_notify(message, FALSE, AUTH_LIFETIME, chunk);
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}
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}
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/**
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* read notifys from message and evaluate them
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*/
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static void process_payloads(private_ike_auth_lifetime_t *this, message_t *message)
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{
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enumerator_t *enumerator;
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payload_t *payload;
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notify_payload_t *notify;
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enumerator = message->create_payload_enumerator(message);
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while (enumerator->enumerate(enumerator, &payload))
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{
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if (payload->get_type(payload) == NOTIFY)
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{
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notify = (notify_payload_t*)payload;
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switch (notify->get_notify_type(notify))
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{
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case AUTH_LIFETIME:
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{
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chunk_t data = notify->get_notification_data(notify);
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u_int32_t lifetime = ntohl(*(u_int32_t*)data.ptr);
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this->ike_sa->set_auth_lifetime(this->ike_sa, lifetime);
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break;
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}
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default:
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break;
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}
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}
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}
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enumerator->destroy(enumerator);
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}
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/**
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* Implementation of task_t.process for initiator
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*/
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static status_t build_i(private_ike_auth_lifetime_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == INFORMATIONAL)
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{
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add_auth_lifetime(this, message);
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return SUCCESS;
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}
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.process for responder
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*/
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static status_t process_r(private_ike_auth_lifetime_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == INFORMATIONAL)
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{
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process_payloads(this, message);
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return SUCCESS;
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}
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.build for responder
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*/
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static status_t build_r(private_ike_auth_lifetime_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == IKE_AUTH &&
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this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
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{
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add_auth_lifetime(this, message);
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return SUCCESS;
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}
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.process for initiator
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*/
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static status_t process_i(private_ike_auth_lifetime_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == IKE_AUTH &&
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this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
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{
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process_payloads(this, message);
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return SUCCESS;
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}
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.get_type
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*/
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static task_type_t get_type(private_ike_auth_lifetime_t *this)
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{
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return IKE_AUTH_LIFETIME;
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}
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/**
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* Implementation of task_t.migrate
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*/
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static void migrate(private_ike_auth_lifetime_t *this, ike_sa_t *ike_sa)
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{
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this->ike_sa = ike_sa;
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}
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/**
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* Implementation of task_t.destroy
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*/
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static void destroy(private_ike_auth_lifetime_t *this)
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{
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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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ike_auth_lifetime_t *ike_auth_lifetime_create(ike_sa_t *ike_sa, bool initiator)
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{
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private_ike_auth_lifetime_t *this = malloc_thing(private_ike_auth_lifetime_t);
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this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
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this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
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this->public.task.destroy = (void(*)(task_t*))destroy;
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if (initiator)
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{
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this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
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this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
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}
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else
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{
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this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
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this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
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}
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this->ike_sa = ike_sa;
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return &this->public;
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}
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