source: rtems/cpukit/libnetworking/net/if_arp.h @ ef1f80e

4.104.114.84.9
Last change on this file since ef1f80e was ef1f80e, checked in by Ralf Corsepius <ralf.corsepius@…>, on Apr 14, 2005 at 3:09:06 PM

Partial updates from FreeBSD.

  • Property mode set to 100644
File size: 5.1 KB
Line 
1/*
2 * Copyright (c) 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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *      @(#)if_arp.h    8.1 (Berkeley) 6/10/93
30 * $FreeBSD: src/sys/net/if_arp.h,v 1.21 2005/01/07 01:45:34 imp Exp $
31 */
32
33#ifndef _NET_IF_ARP_H_
34#define _NET_IF_ARP_H_
35
36#ifdef __rtems__
37#define BYTE_PACK __attribute__((packed))
38#endif
39
40/*
41 * Address Resolution Protocol.
42 *
43 * See RFC 826 for protocol description.  ARP packets are variable
44 * in size; the arphdr structure defines the fixed-length portion.
45 * Protocol type values are the same as those for 10 Mb/s Ethernet.
46 * It is followed by the variable-sized fields ar_sha, arp_spa,
47 * arp_tha and arp_tpa in that order, according to the lengths
48 * specified.  Field names used correspond to RFC 826.
49 */
50struct  arphdr {
51        u_short ar_hrd BYTE_PACK;               /* format of hardware address */
52#define ARPHRD_ETHER    1       /* ethernet hardware format */
53#define ARPHRD_FRELAY   15      /* frame relay hardware format */
54        u_short ar_pro BYTE_PACK;               /* format of protocol address */
55        u_char  ar_hln BYTE_PACK;               /* length of hardware address */
56        u_char  ar_pln BYTE_PACK;               /* length of protocol address */
57        u_short ar_op BYTE_PACK;                /* one of: */
58#define ARPOP_REQUEST   1       /* request to resolve address */
59#define ARPOP_REPLY     2       /* response to previous request */
60#define ARPOP_REVREQUEST 3      /* request protocol address given hardware */
61#define ARPOP_REVREPLY  4       /* response giving protocol address */
62#define ARPOP_INVREQUEST 8      /* request to identify peer */
63#define ARPOP_INVREPLY  9       /* response identifying peer */
64/*
65 * The remaining fields are variable in size,
66 * according to the sizes above.
67 */
68#ifdef COMMENT_ONLY
69        u_char  ar_sha[];       /* sender hardware address */
70        u_char  ar_spa[];       /* sender protocol address */
71        u_char  ar_tha[];       /* target hardware address */
72        u_char  ar_tpa[];       /* target protocol address */
73#endif
74};
75
76#define ar_sha(ap)      (((caddr_t)((ap)+1)) +   0)
77#define ar_spa(ap)      (((caddr_t)((ap)+1)) +   (ap)->ar_hln)
78#define ar_tha(ap)      (((caddr_t)((ap)+1)) +   (ap)->ar_hln + (ap)->ar_pln)
79#define ar_tpa(ap)      (((caddr_t)((ap)+1)) + 2*(ap)->ar_hln + (ap)->ar_pln)
80
81#define arphdr_len2(ar_hln, ar_pln)                                     \
82        (sizeof(struct arphdr) + 2*(ar_hln) + 2*(ar_pln))
83#define arphdr_len(ap)  (arphdr_len2((ap)->ar_hln, (ap)->ar_pln))
84
85/*
86 * ARP ioctl request
87 */
88struct arpreq {
89        struct  sockaddr arp_pa;                /* protocol address */
90        struct  sockaddr arp_ha;                /* hardware address */
91        int     arp_flags;                      /* flags */
92};
93/*  arp_flags and at_flags field values */
94#define ATF_INUSE       0x01    /* entry in use */
95#define ATF_COM         0x02    /* completed entry (enaddr valid) */
96#define ATF_PERM        0x04    /* permanent entry */
97#define ATF_PUBL        0x08    /* publish entry (respond for other host) */
98#define ATF_USETRAILERS 0x10    /* has requested trailers */
99
100#ifdef _KERNEL
101/*
102 * Structure shared between the ethernet driver modules and
103 * the address resolution code.  For example, each ec_softc or il_softc
104 * begins with this structure.
105 * The code is written so that each *_softc _must_ begin with a
106 * struct arpcom, which in turn _must_ begin with a struct ifnet.
107 */
108struct  arpcom {
109        /*
110         * The ifnet struct _must_ be at the head of this structure.
111         */
112        struct  ifnet ac_if;            /* network-visible interface */
113        u_char  ac_enaddr[6];           /* ethernet hardware address */
114#if defined(__rtems__)
115/* Cruft from ancient BSD - should be removed once RTEMS is updated */
116        struct  ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
117        int     ac_multicnt;            /* length of ac_multiaddrs list */
118#else
119        int     now_unused;     /* XXX was length of ac_multiaddrs list */
120        void    *ac_netgraph;           /* ng_ether(4) netgraph node info */
121#endif
122};
123#define IFP2AC(ifp) ((struct arpcom *)(ifp))
124
125#endif
126
127#endif /* !_NET_IF_ARP_H_ */
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