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/**
* @file parser.h
*
* @brief Interface of parser_t.
*
*/
/*
* 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.
*/
#ifndef PARSER_H_
#define PARSER_H_
#include <types.h>
#include <encoding/payloads/encodings.h>
#include <encoding/payloads/payload.h>
typedef struct parser_t parser_t;
/**
* @brief A parser_t class to parse IKEv2 payloads.
*
* A parser is used for parsing one chunk of data. Multiple
* payloads can be parsed out of the chunk using parse_payload.
* The parser remains the state until destroyed.
*
* @b Constructors:
* - parser_create()
*
* @ingroup encoding
*/
struct parser_t {
/**
* @brief Parses the next payload.
*
* @warning Caller is responsible for freeing allocated payload.
*
* Rules for parsing are described in the payload definition.
*
* @param this parser_t bject
* @param payload_type payload type to parse
* @param[out] payload pointer where parsed payload was allocated
* @return
* - SUCCESSFUL if succeeded,
* - PARSE_ERROR if corrupted/invalid data found
*/
status_t (*parse_payload) (parser_t *this, payload_type_t payload_type, payload_t **payload);
/**
* Gets the remaining byte count which is not currently parsed.
*
* @param parser parser_t object
*/
int (*get_remaining_byte_count) (parser_t *this);
/**
* @brief Resets the current parser context.
*
* @param parser parser_t object
*/
void (*reset_context) (parser_t *this);
/**
* @brief Destroys a parser_t object.
*
* @param parser parser_t object
*/
void (*destroy) (parser_t *this);
};
/**
* @brief Constructor to create a parser_t object.
*
* @param data chunk of data to parse with this parser_t object
* @return parser_t object
*
* @ingroup encoding
*/
parser_t *parser_create(chunk_t data);
#endif /*PARSER_H_*/
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