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      1 /*
      2  * Copyright (c) 1982, 1986, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  * @(#) $Id: arcnet.h,v 1.3 2003/01/23 09:05:37 guy Exp $ (LBL)
     34  *
     35  * from: NetBSD: if_arc.h,v 1.13 1999/11/19 20:41:19 thorpej Exp
     36  */
     37 
     38 /*
     39  * Structure of a 2.5MB/s Arcnet header on the BSDs,
     40  * as given to interface code.
     41  */
     42 struct	arc_header {
     43 	u_int8_t  arc_shost;
     44 	u_int8_t  arc_dhost;
     45 	u_int8_t  arc_type;
     46 	/*
     47 	 * only present for newstyle encoding with LL fragmentation.
     48 	 * Don't use sizeof(anything), use ARC_HDR{,NEW}LEN instead.
     49 	 */
     50 	u_int8_t  arc_flag;
     51 	u_int16_t arc_seqid;
     52 
     53 	/*
     54 	 * only present in exception packets (arc_flag == 0xff)
     55 	 */
     56 	u_int8_t  arc_type2;	/* same as arc_type */
     57 	u_int8_t  arc_flag2;	/* real flag value */
     58 	u_int16_t arc_seqid2;	/* real seqid value */
     59 };
     60 
     61 #define	ARC_HDRLEN		3
     62 #define	ARC_HDRNEWLEN		6
     63 #define	ARC_HDRNEWLEN_EXC	10
     64 
     65 /* RFC 1051 */
     66 #define	ARCTYPE_IP_OLD		240	/* IP protocol */
     67 #define	ARCTYPE_ARP_OLD		241	/* address resolution protocol */
     68 
     69 /* RFC 1201 */
     70 #define	ARCTYPE_IP		212	/* IP protocol */
     71 #define	ARCTYPE_ARP		213	/* address resolution protocol */
     72 #define	ARCTYPE_REVARP		214	/* reverse addr resolution protocol */
     73 
     74 #define	ARCTYPE_ATALK		221	/* Appletalk */
     75 #define	ARCTYPE_BANIAN		247	/* Banyan Vines */
     76 #define	ARCTYPE_IPX		250	/* Novell IPX */
     77 
     78 #define ARCTYPE_INET6		0xc4	/* IPng */
     79 #define ARCTYPE_DIAGNOSE	0x80	/* as per ANSI/ATA 878.1 */
     80 
     81 /*
     82  * Structure of a 2.5MB/s Arcnet header on Linux.  Linux has
     83  * an extra "offset" field when given to interface code, and
     84  * never presents packets that look like exception frames.
     85  */
     86 struct	arc_linux_header {
     87 	u_int8_t  arc_shost;
     88 	u_int8_t  arc_dhost;
     89 	u_int16_t arc_offset;
     90 	u_int8_t  arc_type;
     91 	/*
     92 	 * only present for newstyle encoding with LL fragmentation.
     93 	 * Don't use sizeof(anything), use ARC_LINUX_HDR{,NEW}LEN
     94 	 * instead.
     95 	 */
     96 	u_int8_t  arc_flag;
     97 	u_int16_t arc_seqid;
     98 };
     99 
    100 #define	ARC_LINUX_HDRLEN	5
    101 #define	ARC_LINUX_HDRNEWLEN	8
    102