/* $NetBSD: ieee8023_tlv.h,v 1.3 2007/02/21 23:00:06 thorpej Exp $ */

/* $NetBSD: ieee8023_tlv.h,v 1.3 2007/02/21 23:00:06 thorpej Exp $ */

/*-
* Copyright (c)2005 YAMAMOTO Takashi,
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef _NET_AGR_IEEE8023_TLV_H_
#define _NET_AGR_IEEE8023_TLV_H_

/*
* TLV on-wire structure.
*/

struct tlvhdr {
uint8_t tlv_type;
uint8_t tlv_length;
/* uint8_t tlv_value[]; */
} __packed;

/*
* ... and our implementation.
*/

#define TLV_SET(tlv, type, length) \
do { \
(tlv)->tlv_type = (type); \
(tlv)->tlv_length = sizeof(*tlv) + (length); \
} while (/*CONSTCOND*/0)

struct tlv_template {
uint8_t tmpl_type;
uint8_t tmpl_length;
};

int tlv_check(const void *, size_t, const struct tlvhdr *,
const struct tlv_template *, bool);

#endif /* !_NET_AGR_IEEE8023_TLV_H_ */