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/*
* Copyright (C) 2009 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.
*/
/**
* @defgroup attribute_handler attribute_handler
* @{ @ingroup attributes
*/
#ifndef ATTRIBUTE_HANDLER_H_
#define ATTRIBUTE_HANDLER_H_
#include <utils/chunk.h>
#include <utils/identification.h>
#include <collections/linked_list.h>
#include "attributes.h"
typedef struct attribute_handler_t attribute_handler_t;
/**
* Interface to handle configuration payload attributes.
*/
struct attribute_handler_t {
/**
* Handle a configuration attribute.
*
* After receiving a configuration attriubte, it is passed to each
* attribute handler until it is handled.
*
* @param server server from which the attribute was received
* @param type type of configuration attribute to handle
* @param data associated attribute data
* @return TRUE if attribute handled
*/
bool (*handle)(attribute_handler_t *this, identification_t *server,
configuration_attribute_type_t type, chunk_t data);
/**
* Release an attribute handled during handle().
*
* A handler that handle()d an attribute gets a call to release() when the
* connection gets closed. Depending on the implementation, this is required
* to remove the attribute.
*/
void (*release)(attribute_handler_t *this, identification_t *server,
configuration_attribute_type_t type, chunk_t data);
/**
* Enumerate attributes to request from a server.
*
* @param server server identity to request attributes from
* @param vips list of virtual IPs (host_t*) we are requesting
* @return enumerator (configuration_attribute_type_t, chunk_t)
*/
enumerator_t* (*create_attribute_enumerator)(attribute_handler_t *this,
identification_t *server, linked_list_t *vips);
};
#endif /** ATTRIBUTE_HANDLER_H_ @}*/
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