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/*
* Copyright (C) 2005-2009 Martin Willi
* Copyright (C) 2005 Jan Hutter
* 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.
*/
/**
* @defgroup generator generator
* @{ @ingroup encoding
*/
#ifndef GENERATOR_H_
#define GENERATOR_H_
typedef struct generator_t generator_t;
#include <library.h>
#include <encoding/payloads/encodings.h>
#include <encoding/payloads/payload.h>
/**
* Generating is done in a data buffer.
* This is the start size of this buffer in bytes.
*/
#define GENERATOR_DATA_BUFFER_SIZE 500
/**
* Number of bytes to increase the buffer, if it is too small.
*/
#define GENERATOR_DATA_BUFFER_INCREASE_VALUE 500
/**
* A generator_t class used to generate IKEv2 payloads.
*
* After creation, multiple payloads can be generated with the generate_payload
* method. The generated bytes are appended. After all payloads are added,
* the write_to_chunk method writes out all generated data since
* the creation of the generator. After that, the generator must be destroyed.
* The generater uses a set of encoding rules, which it can get from
* the supplied payload. With this rules, the generater can generate
* the payload and all substructures automatically.
*/
struct generator_t {
/**
* Generates a specific payload from given payload object.
*
* Remember: Header and substructures are also handled as payloads.
*
* @param payload interface payload_t implementing object
*/
void (*generate_payload) (generator_t *this,payload_t *payload);
/**
* Writes all generated data of the generator to a chunk.
*
* @param data chunk to write the data to
*/
void (*write_to_chunk) (generator_t *this,chunk_t *data);
/**
* Destroys a generator_t object.
*/
void (*destroy) (generator_t *this);
};
/**
* Constructor to create a generator.
*
* @return generator_t object.
*/
generator_t *generator_create(void);
#endif /** GENERATOR_H_ @}*/
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