/*      $NetBSD: if_etherip.h,v 1.12 2016/12/14 11:19:15 knakahara Exp $        */

/*
 *  Copyright (c) 2006, Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
 *  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.
 *  3. Neither the name of Hans Rosenfeld nor the names of his
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  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_IF_ETHERIP_H_
#define _NET_IF_ETHERIP_H_

#include <sys/queue.h>

#ifdef _KERNEL_OPT
#include "opt_inet.h"
#endif

#include <netinet/in.h>

struct etherip_softc {
	struct ifmedia  sc_im;
	device_t	sc_dev;
	struct ethercom sc_ec;
	struct sockaddr *sc_src;                /* tunnel source address      */
	struct sockaddr *sc_dst;                /* tunnel destination address */
	struct route     sc_ro;			/*
						 * cached inet route
						 * TODO:
						 * we must make percpu when MP-ify
						 */
	void *sc_si;                            /* softintr handle            */
	LIST_ENTRY(etherip_softc) etherip_list; /* list of etherip tunnels    */
};

LIST_HEAD(etherip_softc_list, etherip_softc);
extern struct etherip_softc_list etherip_softc_list;

struct etherip_header {
	uint8_t eip_ver;       /* version/reserved */
	uint8_t eip_pad;       /* required padding byte */
};

#define ETHERIP_VER_VERS_MASK   0x0f
#define ETHERIP_VER_RSVD_MASK   0xf0
#define ETHERIP_VERSION         0x03

#define ETHERIP_TTL 30
#define ETHERIP_ROUTE_TTL 10

#endif /* !_NET_IF_ETHERIP_H_ */