rmp.h revision 27074 
1/*	$NetBSD: rmp.h,v 1.4 1995/10/06 05:12:18 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1988, 1992 The University of Utah and the Center
5 *	for Software Science (CSS).
6 * Copyright (c) 1992, 1993
7 *	The Regents of the University of California.  All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * the Center for Software Science of the University of Utah Computer
11 * Science Department.  CSS requests users of this software to return
12 * to css-dist@cs.utah.edu any improvements that they make and grant
13 * CSS redistribution rights.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 *    notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 *    notice, this list of conditions and the following disclaimer in the
22 *    documentation and/or other materials provided with the distribution.
23 * 3. All advertising materials mentioning features or use of this software
24 *    must display the following acknowledgement:
25 *	This product includes software developed by the University of
26 *	California, Berkeley and its contributors.
27 * 4. Neither the name of the University nor the names of its contributors
28 *    may be used to endorse or promote products derived from this software
29 *    without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 *
43 *	from: @(#)rmp.h	8.1 (Berkeley) 6/4/93
44 *
45 * From: Utah Hdr: rmp.h 3.1 92/07/06
46 * Author: Jeff Forys, University of Utah CSS
47 */
48
49/*
50 *  Define MIN/MAX sizes of RMP (ethernet) packet.
51 *  For ease of computation, the 4 octet CRC field is not included.
52 *
53 *  MCLBYTES is for bpfwrite(); it is adamant about using a cluster.
54 */
55
56#define	RMP_MAX_PACKET	MIN(1514,MCLBYTES)
57#define	RMP_MIN_PACKET	60
58
59/*
60 *  Define RMP/Ethernet Multicast address (9:0:9:0:0:4) and its length.
61 */
62#define	RMP_ADDR	{ 0x9, 0x0, 0x9, 0x0, 0x0, 0x4 }
63#define	RMP_ADDRLEN	6
64
65/*
66 *  Define IEEE802.2 (Logical Link Control) information.
67 */
68#define	IEEE_DSAP_HP	0xF8	/* Destination Service Access Point */
69#define	IEEE_SSAP_HP	0xF8	/* Source Service Access Point */
70#define	IEEE_CNTL_HP	0x0300	/* Type 1 / I format control information */
71
72#define	HPEXT_DXSAP	0x608	/* HP Destination Service Access Point */
73#define	HPEXT_SXSAP	0x609	/* HP Source Service Access Point */
74
75/*
76 *  802.3-style "Ethernet" header.
77 */
78
79struct hp_hdr {
80	u_int8_t	daddr[RMP_ADDRLEN];
81	u_int8_t	saddr[RMP_ADDRLEN];
82	u_int16_t	len;
83};
84
85/*
86 * HP uses 802.2 LLC with their own local extensions.  This struct makes
87 * sense out of this data (encapsulated in the above 802.3 packet).
88 */
89
90struct hp_llc {
91	u_int8_t	dsap;		/* 802.2 DSAP */
92	u_int8_t	ssap;		/* 802.2 SSAP */
93	u_int16_t	cntrl;		/* 802.2 control field */
94	u_int16_t	filler;		/* HP filler (must be zero) */
95	u_int16_t	dxsap;		/* HP extended DSAP */
96	u_int16_t	sxsap;		/* HP extended SSAP */
97};
98