/*      $NetBSD: if_arc.h,v 1.23 2017/10/23 09:22:24 msaitoh Exp $      */

/*
* Copyright (c) 1982, 1986, 1993
*      The Regents of the University of California.  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 the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: NetBSD: if_ether.h,v 1.10 1994/06/29 06:37:55 cgd Exp
*       @(#)if_ether.h 8.1 (Berkeley) 6/10/93
*/

#ifndef _NET_IF_ARC_H_
#define _NET_IF_ARC_H_

/*
* Arcnet address - 1 octets
* don't know who uses this.
*/
struct arc_addr {
       uint8_t  arc_addr_octet[1];
} __packed;

/*
* Structure of a 2.5MB/s Arcnet header.
* as given to interface code.
*/
struct  arc_header {
       uint8_t  arc_shost;
       uint8_t  arc_dhost;
       uint8_t  arc_type;
       /*
        * only present for newstyle encoding with LL fragmentation.
        * Don't use sizeof(anything), use ARC_HDR{,NEW}LEN instead.
        */
       uint8_t  arc_flag;
       uint16_t arc_seqid;

       /*
        * only present in exception packets (arc_flag == 0xff)
        */
       uint8_t  arc_type2;     /* same as arc_type */
       uint8_t  arc_flag2;     /* real flag value */
       uint16_t arc_seqid2;    /* real seqid value */
} __packed;

#define ARC_ADDR_LEN            1

#define ARC_HDRLEN              3
#define ARC_HDRNEWLEN           6
#define ARC_HDRNEWLEN_EXC       10

/* these lengths are data link layer length - 2*ARC_ADDR_LEN */
#define ARC_MIN_LEN             1
#define ARC_MIN_FORBID_LEN      254
#define ARC_MAX_FORBID_LEN      256
#define ARC_MAX_LEN             508


/* RFC 1051 */
#define ARCTYPE_IP_OLD          240     /* IP protocol */
#define ARCTYPE_ARP_OLD         241     /* address resolution protocol */

/* RFC 1201 */
#define ARCTYPE_IP              212     /* IP protocol */
#define ARCTYPE_ARP             213     /* address resolution protocol */
#define ARCTYPE_REVARP          214     /* reverse addr resolution protocol */

#define ARCTYPE_ATALK           221     /* Appletalk */
#define ARCTYPE_BANIAN          247     /* Banyan Vines */
#define ARCTYPE_IPX             250     /* Novell IPX */

#define ARCTYPE_INET6           0xc4    /* IPng */
#define ARCTYPE_DIAGNOSE        0x80    /* as per ANSI/ATA 878.1 */

#define ARCMTU                  507
#define ARCMIN                  0

#define ARC_PHDS_MAXMTU         60480

struct  arccom {
       struct    ifnet ac_if;          /* network-visible interface */

       uint16_t ac_seqid;              /* seq. id used by PHDS encap. */

       struct ac_frag {
               uint8_t  af_maxflag;    /* from first packet */
               uint8_t  af_lastseen;   /* last split flag seen */
               uint16_t af_seqid;
               struct mbuf *af_packet;
       } ac_fragtab[256];              /* indexed by sender ll address */

};

#ifdef _KERNEL
extern uint8_t arcbroadcastaddr;
extern int arc_ipmtu;   /* XXX new ip only, no RFC 1051! */

int     arc_ifattach(struct ifnet *, uint8_t);
char    *arc_sprintf(uint8_t *);
int     arc_isphds(uint8_t);
#endif

#endif /* !_NET_IF_ARC_H_ */