226 lines
4.9 KiB
C
226 lines
4.9 KiB
C
/**
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* @file message.c
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*
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* @brief Class message_t. Object of this type represents an IKEv2-Message.
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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 <stdlib.h>
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#include "allocator.h"
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#include "types.h"
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#include "message.h"
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#include "linked_list.h"
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#include "encodings.h"
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/**
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* Entry for a payload in the internal used linked list
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*
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*/
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typedef struct payload_entry_s payload_entry_t;
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struct payload_entry_s{
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/**
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* Type of payload
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*/
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payload_type_t payload_type;
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/**
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* Data struct holding the data of given payload
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*/
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void *data_struct;
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};
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/**
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* Private data of an message_t object
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*/
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typedef struct private_message_s private_message_t;
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struct private_message_s {
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/**
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* Public part of a message_t object
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*/
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message_t public;
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/* Private values */
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/**
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* Assigned exchange type
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*/
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exchange_type_t exchange_type;
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/**
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* TRUE if message is from original initiator, FALSE otherwise.
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*/
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bool original_initiator;
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/**
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* TRUE if message is request.
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* FALSE if message is reply.
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*/
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bool is_request;
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/**
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* Assigned UDP packet.
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*
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* Stores incoming packet or last generated one.
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*/
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packet_t *packet;
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/**
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* Linked List where payload data are stored in
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*/
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linked_list_t *payloads;
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};
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/**
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* Implements message_t's set_exchange_type function.
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* See #message_s.set_exchange_type.
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*/
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static status_t set_exchange_type (private_message_t *this,exchange_type_t exchange_type)
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{
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this->exchange_type = exchange_type;
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return SUCCESS;
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}
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/**
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* Implements message_t's get_exchange_type function.
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* See #message_s.get_exchange_type.
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*/
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static exchange_type_t get_exchange_type (private_message_t *this)
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{
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return this->exchange_type;
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}
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/**
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* Implements message_t's set_original_initiator function.
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* See #message_s.set_original_initiator.
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*/
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static status_t set_original_initiator (private_message_t *this,bool original_initiator)
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{
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this->original_initiator = original_initiator;
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return SUCCESS;
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}
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/**
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* Implements message_t's get_original_initiator function.
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* See #message_s.get_original_initiator.
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*/
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static exchange_type_t get_original_initiator (private_message_t *this)
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{
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return this->original_initiator;
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}
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/**
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* Implements message_t's set_request function.
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* See #message_s.set_request.
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*/
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static status_t set_request (private_message_t *this,bool request)
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{
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this->is_request = request;
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return SUCCESS;
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}
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/**
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* Implements message_t's get_request function.
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* See #message_s.get_request.
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*/
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static exchange_type_t get_request (private_message_t *this)
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{
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return this->is_request;
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}
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/**
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* Implements message_t's generate_packet function.
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* See #message_s.generate_packet.
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*/
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static status_t generate_packet (private_message_t *this, packet_t **packet)
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{
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if (this->exchange_type == NOT_SET)
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{
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return EXCHANGE_TYPE_NOT_SET;
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}
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return SUCCESS;
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}
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/**
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* Implements message_t's destroy function.
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* See #message_s.destroy.
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*/
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static status_t destroy (private_message_t *this)
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{
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if (this->packet != NULL)
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{
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this->packet->destroy(this->packet);
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}
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this->payloads->destroy(this->payloads);
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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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* Described in Header-File
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*/
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message_t *message_create_from_packet(packet_t *packet)
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{
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private_message_t *this = allocator_alloc_thing(private_message_t);
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if (this == NULL)
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{
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return NULL;
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}
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/* public functions */
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this->public.set_exchange_type = (status_t(*)(message_t*, exchange_type_t))set_exchange_type;
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this->public.get_exchange_type = (exchange_type_t(*)(message_t*))get_exchange_type;
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this->public.set_original_initiator = (status_t(*)(message_t*, bool))set_original_initiator;
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this->public.get_original_initiator = (bool(*)(message_t*))get_original_initiator;
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this->public.set_request = (status_t(*)(message_t*, bool))set_request;
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this->public.get_request = (bool(*)(message_t*))get_request;
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this->public.generate_packet = (status_t (*) (message_t *, packet_t **)) generate_packet;
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this->public.destroy = (status_t(*)(message_t*))destroy;
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/* public values */
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this->exchange_type = NOT_SET;
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this->original_initiator = TRUE;
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this->is_request = TRUE;
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/* private values */
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this->packet = packet;
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this->payloads = linked_list_create();
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if (this->payloads == NULL)
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{
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allocator_free(this);
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return NULL;
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}
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return (&this->public);
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}
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/*
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* Described in Header-File
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*/
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message_t *message_create()
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{
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return message_create_from_packet(NULL);
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}
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