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/**
* @file ike_delete.c
*
* @brief Implementation of the ike_delete task.
*
*/
/*
* Copyright (C) 2006-2007 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_delete.h"
#include <daemon.h>
#include <encoding/payloads/delete_payload.h>
typedef struct private_ike_delete_t private_ike_delete_t;
/**
* Private members of a ike_delete_t task.
*/
struct private_ike_delete_t {
/**
* Public methods and task_t interface.
*/
ike_delete_t public;
/**
* Assigned IKE_SA.
*/
ike_sa_t *ike_sa;
/**
* Are we the initiator?
*/
bool initiator;
/**
* are we responding to a delete, but have initated our own?
*/
bool simultaneous;
};
/**
* Implementation of task_t.build for initiator
*/
static status_t build_i(private_ike_delete_t *this, message_t *message)
{
delete_payload_t *delete_payload;
delete_payload = delete_payload_create(PROTO_IKE);
message->add_payload(message, (payload_t*)delete_payload);
this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
return NEED_MORE;
}
/**
* Implementation of task_t.process for initiator
*/
static status_t process_i(private_ike_delete_t *this, message_t *message)
{
/* completed, delete IKE_SA by returning FAILED */
return FAILED;
}
/**
* Implementation of task_t.process for initiator
*/
static status_t process_r(private_ike_delete_t *this, message_t *message)
{
/* we don't even scan the payloads, as the message wouldn't have
* come so far without being correct */
switch (this->ike_sa->get_state(this->ike_sa))
{
case IKE_DELETING:
this->simultaneous = TRUE;
break;
case IKE_ESTABLISHED:
DBG1(DBG_IKE, "deleting IKE_SA on request");
break;
case IKE_REKEYING:
DBG1(DBG_IKE, "initiated rekeying, but received delete for IKE_SA");
break;
default:
break;
}
this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
return NEED_MORE;
}
/**
* Implementation of task_t.build for responder
*/
static status_t build_r(private_ike_delete_t *this, message_t *message)
{
if (this->simultaneous)
{
/* wait for peers response for our delete request, but set a timeout */
return SUCCESS;
}
/* completed, delete IKE_SA by returning FAILED */
return FAILED;
}
/**
* Implementation of task_t.get_type
*/
static task_type_t get_type(private_ike_delete_t *this)
{
return IKE_DELETE;
}
/**
* Implementation of task_t.migrate
*/
static void migrate(private_ike_delete_t *this, ike_sa_t *ike_sa)
{
this->ike_sa = ike_sa;
this->simultaneous = FALSE;
}
/**
* Implementation of task_t.destroy
*/
static void destroy(private_ike_delete_t *this)
{
free(this);
}
/*
* Described in header.
*/
ike_delete_t *ike_delete_create(ike_sa_t *ike_sa, bool initiator)
{
private_ike_delete_t *this = malloc_thing(private_ike_delete_t);
this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
this->public.task.destroy = (void(*)(task_t*))destroy;
if (initiator)
{
this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
}
else
{
this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
}
this->ike_sa = ike_sa;
this->initiator = initiator;
this->simultaneous = FALSE;
return &this->public;
}
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