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131 lines
2.8 KiB
C
131 lines
2.8 KiB
C
/**
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* @file packet.c
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*
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* @brief UDP-Packet, contains data, sender and receiver.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, 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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#include "packet.h"
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#include "utils/allocator.h"
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/**
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* Private data of an packet_t object
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*/
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typedef struct private_packet_s private_packet_t;
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struct private_packet_s {
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/**
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* Public part of a packet_t object
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*/
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packet_t public;
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};
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/**
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* Implements packet_t's destroy function.
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* See #packet_s.destroy for description.
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*/
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static status_t destroy(private_packet_t *this)
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{
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if (this->public.source != NULL)
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{
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this->public.source->destroy(this->public.source);
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}
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if (this->public.destination != NULL)
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{
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this->public.destination->destroy(this->public.destination);
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}
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if (this->public.data.ptr != NULL)
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{
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allocator_free(this->public.data.ptr);
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}
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allocator_free(this);
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return SUCCESS;
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}
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/**
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* Implements packet_t's clone function.
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* See #packet_s.clone for description.
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*/
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static status_t clone (private_packet_t *this, packet_t **clone)
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{
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packet_t *other;
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other = packet_create();
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if (other == NULL)
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{
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return OUT_OF_RES;
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}
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if (this->public.destination != NULL)
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{
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this->public.destination->clone(this->public.destination, &(other->destination));
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}
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else {
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other->destination = NULL;
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}
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if (this->public.source != NULL)
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{
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this->public.source->clone(this->public.source, &(other->source));
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}
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else {
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other->source = NULL;
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}
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/* only clone existing chunks :-) */
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if (this->public.data.ptr != NULL)
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{
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other->data.ptr = allocator_clone_bytes(this->public.data.ptr,this->public.data.len);
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if (other->data.ptr == NULL)
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{
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other->destroy(other);
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return OUT_OF_RES;
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}
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other->data.len = this->public.data.len;
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}
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else
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{
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other->data.ptr = NULL;
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other->data.len = 0;
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}
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*clone = other;
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return SUCCESS;
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}
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/*
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* Documented in header
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*/
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packet_t *packet_create()
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{
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private_packet_t *this = allocator_alloc_thing(private_packet_t);
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this->public.destroy = (status_t(*) (packet_t *)) destroy;
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this->public.clone = (status_t(*) (packet_t *,packet_t**))clone;
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this->public.destination = NULL;
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this->public.source = NULL;
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this->public.data.len = 0;
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this->public.data.ptr = NULL;
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return &(this->public);
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}
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