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/**
* @file packet.c
*
* @brief UDP-Packet, contains data, sender and receiver.
*
*/
/*
* 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 "packet.h"
#include <utils/allocator.h>
typedef struct private_packet_t private_packet_t;
/**
* Private data of an packet_t object.
*/
struct private_packet_t {
/**
* Public part of a packet_t object.
*/
packet_t public;
};
/**
* Implements packet_t's destroy function.
* See #packet_s.destroy for description.
*/
static status_t destroy(private_packet_t *this)
{
if (this->public.source != NULL)
{
this->public.source->destroy(this->public.source);
}
if (this->public.destination != NULL)
{
this->public.destination->destroy(this->public.destination);
}
if (this->public.data.ptr != NULL)
{
allocator_free(this->public.data.ptr);
}
allocator_free(this);
return SUCCESS;
}
/**
* Implements packet_t's clone function.
* See #packet_s.clone for description.
*/
static status_t clone (private_packet_t *this, packet_t **clone)
{
packet_t *other;
other = packet_create();
if (other == NULL)
{
return OUT_OF_RES;
}
if (this->public.destination != NULL)
{
other->destination = this->public.destination->clone(this->public.destination);
}
else {
other->destination = NULL;
}
if (this->public.source != NULL)
{
other->source = this->public.source->clone(this->public.source);
}
else {
other->source = NULL;
}
/* only clone existing chunks :-) */
if (this->public.data.ptr != NULL)
{
other->data.ptr = allocator_clone_bytes(this->public.data.ptr,this->public.data.len);
if (other->data.ptr == NULL)
{
other->destroy(other);
return OUT_OF_RES;
}
other->data.len = this->public.data.len;
}
else
{
other->data.ptr = NULL;
other->data.len = 0;
}
*clone = other;
return SUCCESS;
}
/*
* Documented in header
*/
packet_t *packet_create()
{
private_packet_t *this = allocator_alloc_thing(private_packet_t);
this->public.destroy = (status_t(*) (packet_t *)) destroy;
this->public.clone = (status_t(*) (packet_t *,packet_t**))clone;
this->public.destination = NULL;
this->public.source = NULL;
this->public.data.len = 0;
this->public.data.ptr = NULL;
return &(this->public);
}
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