tcp_syncache.cache_limit is a per-cpu limit, reserve enough space for all
[dragonfly.git] / sys / net / if_arc.h
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1/* $NetBSD: if_arc.h,v 1.13 1999/11/19 20:41:19 thorpej Exp $ */
2/* $FreeBSD: src/sys/net/if_arc.h,v 1.2.2.3 2003/01/28 11:19:05 fjoe Exp $ */
3013ac0e 3/* $DragonFly: src/sys/net/Attic/if_arc.h,v 1.4 2004/07/23 07:16:30 joerg Exp $ */
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4
5/*
6 * Copyright (c) 1982, 1986, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: NetBSD: if_ether.h,v 1.10 1994/06/29 06:37:55 cgd Exp
38 * @(#)if_ether.h 8.1 (Berkeley) 6/10/93
39 */
40
41#ifndef _NET_IF_ARC_H_
42#define _NET_IF_ARC_H_
43
44/*
45 * Arcnet address - 1 octets
46 * don't know who uses this.
47 */
48struct arc_addr {
49 u_int8_t arc_addr_octet[1];
50} __attribute__((__packed__));
51
52/*
53 * Structure of a 2.5MB/s Arcnet header.
54 * as given to interface code.
55 */
56struct arc_header {
57 u_int8_t arc_shost;
58 u_int8_t arc_dhost;
59 u_int8_t arc_type;
60 /*
61 * only present for newstyle encoding with LL fragmentation.
62 * Don't use sizeof(anything), use ARC_HDR{,NEW}LEN instead.
63 */
64 u_int8_t arc_flag;
65 u_int16_t arc_seqid;
66
67 /*
68 * only present in exception packets (arc_flag == 0xff)
69 */
70 u_int8_t arc_type2; /* same as arc_type */
71 u_int8_t arc_flag2; /* real flag value */
72 u_int16_t arc_seqid2; /* real seqid value */
73} __attribute__((__packed__));
74
75#define ARC_ADDR_LEN 1
76
77#define ARC_HDRLEN 3
78#define ARC_HDRNEWLEN 6
79#define ARC_HDRNEWLEN_EXC 10
80
81/* these lengths are data link layer length - 2 * ARC_ADDR_LEN */
82#define ARC_MIN_LEN 1
83#define ARC_MIN_FORBID_LEN 254
84#define ARC_MAX_FORBID_LEN 256
85#define ARC_MAX_LEN 508
86#define ARC_MAX_DATA 504
87
88/* RFC 1051 */
89#define ARCTYPE_IP_OLD 240 /* IP protocol */
90#define ARCTYPE_ARP_OLD 241 /* address resolution protocol */
91
92/* RFC 1201 */
93#define ARCTYPE_IP 212 /* IP protocol */
94#define ARCTYPE_ARP 213 /* address resolution protocol */
95#define ARCTYPE_REVARP 214 /* reverse addr resolution protocol */
96
97#define ARCTYPE_ATALK 221 /* Appletalk */
98#define ARCTYPE_BANIAN 247 /* Banyan Vines */
99#define ARCTYPE_IPX 250 /* Novell IPX */
100
101#define ARCTYPE_INET6 0xc4 /* IPng */
102#define ARCTYPE_DIAGNOSE 0x80 /* as per ANSI/ATA 878.1 */
103
104#define ARCMTU 507
105#define ARCMIN 0
106
107#define ARC_PHDS_MAXMTU 60480
108
109struct arccom {
110 struct ifnet ac_if; /* network-visible interface */
111
112 u_int16_t ac_seqid; /* seq. id used by PHDS encap. */
113
114 u_int8_t arc_shost;
115 u_int8_t arc_dhost;
116 u_int8_t arc_type;
117
118 u_int8_t dummy0;
119 u_int16_t dummy1;
120 int sflag, fsflag, rsflag;
121 struct mbuf *curr_frag;
122
123 struct ac_frag {
124 u_int8_t af_maxflag; /* from first packet */
125 u_int8_t af_lastseen; /* last split flag seen */
126 u_int16_t af_seqid;
127 struct mbuf *af_packet;
128 } ac_fragtab[256]; /* indexed by sender ll address */
129};
130
131#ifdef _KERNEL
132extern int arc_ipmtu; /* XXX new ip only, no RFC 1051! */
133
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134void arc_ifattach (struct ifnet *, u_int8_t);
135void arc_ifdetach (struct ifnet *);
136void arc_storelladdr (struct ifnet *, u_int8_t);
137int arc_isphds (int);
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138int arc_ioctl (struct ifnet *, int, caddr_t);
139
140void arc_frag_init (struct ifnet *);
141struct mbuf * arc_frag_next (struct ifnet *);
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142#endif
143
144#endif /* _NET_IF_ARC_H_ */