source: rtems/cpukit/libnetworking/netinet/if_ether.h @ dac1edb

4.104.114.84.95
Last change on this file since dac1edb was dac1edb, checked in by Ralf Corsepius <ralf.corsepius@…>, on Dec 2, 2004 at 6:42:53 PM

2004-12-02 Ralf Corsepius <ralf.corsepius@…>

  • libnetworking/net/radix.c, libnetworking/net/radix.h, libnetworking/net/route.h, libnetworking/netinet/if_ether.h, libnetworking/netinet/in_var.h, libnetworking/netinet/tcp_timer.h, libnetworking/netinet/udp_usrreq.c, libnetworking/netinet/udp_var.h, libnetworking/sys/callout.h, libnetworking/sys/socketvar.h, libnetworking/sys/sysctl.h: Cosmetics from FreeBSD.
  • Property mode set to 100644
File size: 7.3 KB
Line 
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 * 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_ether.h  8.3 (Berkeley) 5/2/95
30 * $FreeBSD: src/sys/netinet/if_ether.h,v 1.30 2004/04/07 20:46:13 imp Exp $
31 */
32
33/*
34 *      $Id$
35 */
36
37#ifndef _NETINET_IF_ETHER_H_
38#define _NETINET_IF_ETHER_H_
39
40#include <net/ethernet.h>
41#include <net/if_arp.h>
42
43#define ETHERTYPE_PUP           0x0200  /* PUP protocol */
44#define ETHERTYPE_IP            0x0800  /* IP protocol */
45#define ETHERTYPE_ARP           0x0806  /* Addr. resolution protocol */
46#define ETHERTYPE_REVARP        0x8035  /* reverse Addr. resolution protocol */
47
48/*
49 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
50 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
51 * by an ETHER type (as given above) and then the (variable-length) header.
52 */
53#define ETHERTYPE_TRAIL         0x1000          /* Trailer packet */
54#define ETHERTYPE_NTRAILER      16
55
56#define ETHERMTU        (ETHER_MAX_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
57#define ETHERMIN        (ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
58
59#ifdef _KERNEL
60/*
61 * Macro to map an IP multicast address to an Ethernet multicast address.
62 * The high-order 25 bits of the Ethernet address are statically assigned,
63 * and the low-order 23 bits are taken from the low end of the IP address.
64 */
65#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
66        /* struct in_addr *ipaddr; */ \
67        /* u_char enaddr[ETHER_ADDR_LEN];          */ \
68{ \
69        (enaddr)[0] = 0x01; \
70        (enaddr)[1] = 0x00; \
71        (enaddr)[2] = 0x5e; \
72        (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
73        (enaddr)[4] = ((u_char *)ipaddr)[2]; \
74        (enaddr)[5] = ((u_char *)ipaddr)[3]; \
75}
76#endif
77
78/*
79 * Ethernet Address Resolution Protocol.
80 *
81 * See RFC 826 for protocol description.  Structure below is adapted
82 * to resolving internet addresses.  Field names used correspond to
83 * RFC 826.
84 */
85struct  ether_arp {
86        struct  arphdr ea_hdr BYTE_PACK;        /* fixed-size header */
87        u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
88        u_char  arp_spa[4];     /* sender protocol address */
89        u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
90        u_char  arp_tpa[4];     /* target protocol address */
91};
92#define arp_hrd ea_hdr.ar_hrd
93#define arp_pro ea_hdr.ar_pro
94#define arp_hln ea_hdr.ar_hln
95#define arp_pln ea_hdr.ar_pln
96#define arp_op  ea_hdr.ar_op
97
98
99/*
100 * Structure shared between the ethernet driver modules and
101 * the address resolution code.  For example, each ec_softc or il_softc
102 * begins with this structure.
103 */
104struct  arpcom {
105        /*
106         * The ifnet struct _must_ be at the head of this structure.
107         */
108        struct  ifnet ac_if;            /* network-visible interface */
109        u_char  ac_enaddr[ETHER_ADDR_LEN];              /* ethernet hardware address */
110        struct  ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
111        int     ac_multicnt;            /* length of ac_multiaddrs list */
112};
113
114struct sockaddr_inarp {
115        u_char  sin_len;
116        u_char  sin_family;
117        u_short sin_port;
118        struct  in_addr sin_addr;
119        struct  in_addr sin_srcaddr;
120        u_short sin_tos;
121        u_short sin_other;
122#define SIN_PROXY 1
123};
124/*
125 * IP and ethernet specific routing flags
126 */
127#define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
128#define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
129
130#ifdef  _KERNEL
131extern u_char   etherbroadcastaddr[ETHER_ADDR_LEN];
132extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
133extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
134extern struct   ifqueue arpintrq;
135
136int     arpresolve __P((struct arpcom *, struct rtentry *, struct mbuf *,
137                        struct sockaddr *, u_char *, struct rtentry *));
138void    arp_ifinit __P((struct arpcom *, struct ifaddr *));
139int     ether_addmulti __P((struct ifreq *, struct arpcom *));
140int     ether_delmulti __P((struct ifreq *, struct arpcom *));
141
142/*
143 * Ethernet multicast address structure.  There is one of these for each
144 * multicast address or range of multicast addresses that we are supposed
145 * to listen to on a particular interface.  They are kept in a linked list,
146 * rooted in the interface's arpcom structure.  (This really has nothing to
147 * do with ARP, or with the Internet address family, but this appears to be
148 * the minimally-disrupting place to put it.)
149 */
150struct ether_multi {
151        u_char  enm_addrlo[ETHER_ADDR_LEN];             /* low  or only address of range */
152        u_char  enm_addrhi[ETHER_ADDR_LEN];             /* high or only address of range */
153        struct  arpcom *enm_ac;         /* back pointer to arpcom */
154        u_int   enm_refcount;           /* no. claims to this addr/range */
155        struct  ether_multi *enm_next;  /* ptr to next ether_multi */
156};
157
158/*
159 * Structure used by macros below to remember position when stepping through
160 * all of the ether_multi records.
161 */
162struct ether_multistep {
163        struct ether_multi  *e_enm;
164};
165
166/*
167 * Macro for looking up the ether_multi record for a given range of Ethernet
168 * multicast addresses connected to a given arpcom structure.  If no matching
169 * record is found, "enm" returns NULL.
170 */
171#define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \
172        /* u_char addrlo[ETHER_ADDR_LEN]; */ \
173        /* u_char addrhi[ETHER_ADDR_LEN]; */ \
174        /* struct arpcom *ac; */ \
175        /* struct ether_multi *enm; */ \
176{ \
177        for ((enm) = (ac)->ac_multiaddrs; \
178            (enm) != NULL && \
179            (bcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 || \
180             bcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 0); \
181                (enm) = (enm)->enm_next); \
182}
183
184/*
185 * Macro to step through all of the ether_multi records, one at a time.
186 * The current position is remembered in "step", which the caller must
187 * provide.  ETHER_FIRST_MULTI(), below, must be called to initialize "step"
188 * and get the first record.  Both macros return a NULL "enm" when there
189 * are no remaining records.
190 */
191#define ETHER_NEXT_MULTI(step, enm) \
192        /* struct ether_multistep step; */  \
193        /* struct ether_multi *enm; */  \
194{ \
195        if (((enm) = (step).e_enm) != NULL) \
196                (step).e_enm = (enm)->enm_next; \
197}
198
199#define ETHER_FIRST_MULTI(step, ac, enm) \
200        /* struct ether_multistep step; */ \
201        /* struct arpcom *ac; */ \
202        /* struct ether_multi *enm; */ \
203{ \
204        (step).e_enm = (ac)->ac_multiaddrs; \
205        ETHER_NEXT_MULTI((step), (enm)); \
206}
207
208#endif
209
210#endif
Note: See TracBrowser for help on using the repository browser.