Use CSTD and remove local CSTD settings which are no longer needed.
[dragonfly.git] / lib / libstand / if_ether.h
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1/* $NetBSD: if_ether.h,v 1.25 1997/01/17 17:06:06 mikel Exp $ */
2
3/*
4 * Copyright (c) 1982, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)if_ether.h 8.1 (Berkeley) 6/10/93
36 *
37 * $FreeBSD: src/lib/libstand/if_ether.h,v 1.1.1.1.6.1 2000/09/20 09:49:17 jkh Exp $
1de703da 38 * $DragonFly: src/lib/libstand/if_ether.h,v 1.2 2003/06/17 04:26:51 dillon Exp $
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39 */
40
41/*
42 * Ethernet address - 6 octets
43 * this is only used by the ethers(3) functions.
44 */
45struct ether_addr {
46 u_int8_t ether_addr_octet[6];
47};
48
49/*
50 * Structure of a 10Mb/s Ethernet header.
51 */
52#define ETHER_ADDR_LEN 6
53
54struct ether_header {
55 u_int8_t ether_dhost[ETHER_ADDR_LEN];
56 u_int8_t ether_shost[ETHER_ADDR_LEN];
57 u_int16_t ether_type;
58};
59
60#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
61#define ETHERTYPE_IP 0x0800 /* IP protocol */
62#define ETHERTYPE_ARP 0x0806 /* address resolution protocol */
63#define ETHERTYPE_REVARP 0x8035 /* reverse addr resolution protocol */
64
65/*
66 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
67 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
68 * by an ETHER type (as given above) and then the (variable-length) header.
69 */
70#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
71#define ETHERTYPE_NTRAILER 16
72
73#define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
74
75#define ETHERMTU 1500
76#define ETHERMIN (60-14)
77
78#ifdef _KERNEL
79/*
80 * Macro to map an IP multicast address to an Ethernet multicast address.
81 * The high-order 25 bits of the Ethernet address are statically assigned,
82 * and the low-order 23 bits are taken from the low end of the IP address.
83 */
84#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
85 /* struct in_addr *ipaddr; */ \
86 /* u_int8_t enaddr[ETHER_ADDR_LEN]; */ \
87{ \
88 (enaddr)[0] = 0x01; \
89 (enaddr)[1] = 0x00; \
90 (enaddr)[2] = 0x5e; \
91 (enaddr)[3] = ((u_int8_t *)ipaddr)[1] & 0x7f; \
92 (enaddr)[4] = ((u_int8_t *)ipaddr)[2]; \
93 (enaddr)[5] = ((u_int8_t *)ipaddr)[3]; \
94}
95#endif
96
97/*
98 * Ethernet Address Resolution Protocol.
99 *
100 * See RFC 826 for protocol description. Structure below is adapted
101 * to resolving internet addresses. Field names used correspond to
102 * RFC 826.
103 */
104struct ether_arp {
105 struct arphdr ea_hdr; /* fixed-size header */
106 u_int8_t arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */
107 u_int8_t arp_spa[4]; /* sender protocol address */
108 u_int8_t arp_tha[ETHER_ADDR_LEN]; /* target hardware address */
109 u_int8_t arp_tpa[4]; /* target protocol address */
110};
111#define arp_hrd ea_hdr.ar_hrd
112#define arp_pro ea_hdr.ar_pro
113#define arp_hln ea_hdr.ar_hln
114#define arp_pln ea_hdr.ar_pln
115#define arp_op ea_hdr.ar_op
116
117/*
118 * Structure shared between the ethernet driver modules and
119 * the address resolution code. For example, each ec_softc or il_softc
120 * begins with this structure.
121 */
122struct arpcom {
123 struct ifnet ac_if; /* network-visible interface */
124 u_int8_t ac_enaddr[ETHER_ADDR_LEN]; /* ethernet hardware address */
125 char ac__pad[2]; /* be nice to m68k ports */
126 LIST_HEAD(, ether_multi) ac_multiaddrs; /* list of ether multicast addrs */
127 int ac_multicnt; /* length of ac_multiaddrs list */
128};
129
130struct llinfo_arp {
131 LIST_ENTRY(llinfo_arp) la_list;
132 struct rtentry *la_rt;
133 struct mbuf *la_hold; /* last packet until resolved/timeout */
134 long la_asked; /* last time we QUERIED for this addr */
135#define la_timer la_rt->rt_rmx.rmx_expire /* deletion time in seconds */
136};
137
138struct sockaddr_inarp {
139 u_int8_t sin_len;
140 u_int8_t sin_family;
141 u_int16_t sin_port;
142 struct in_addr sin_addr;
143 struct in_addr sin_srcaddr;
144 u_int16_t sin_tos;
145 u_int16_t sin_other;
146#define SIN_PROXY 1
147};
148
149/*
150 * IP and ethernet specific routing flags
151 */
152#define RTF_USETRAILERS RTF_PROTO1 /* use trailers */
153#define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */
154
155#ifdef _KERNEL
156u_int8_t etherbroadcastaddr[ETHER_ADDR_LEN];
157u_int8_t ether_ipmulticast_min[ETHER_ADDR_LEN];
158u_int8_t ether_ipmulticast_max[ETHER_ADDR_LEN];
159struct ifqueue arpintrq;
160
161void arpwhohas(struct arpcom *, struct in_addr *);
162void arpintr(void);
163int arpresolve(struct arpcom *,
164 struct rtentry *, struct mbuf *, struct sockaddr *, u_char *);
165void arp_ifinit(struct arpcom *, struct ifaddr *);
166void arp_rtrequest(int, struct rtentry *, struct sockaddr *);
167
168int ether_addmulti(struct ifreq *, struct arpcom *);
169int ether_delmulti(struct ifreq *, struct arpcom *);
170#endif /* _KERNEL */
171
172/*
173 * Ethernet multicast address structure. There is one of these for each
174 * multicast address or range of multicast addresses that we are supposed
175 * to listen to on a particular interface. They are kept in a linked list,
176 * rooted in the interface's arpcom structure. (This really has nothing to
177 * do with ARP, or with the Internet address family, but this appears to be
178 * the minimally-disrupting place to put it.)
179 */
180struct ether_multi {
181 u_int8_t enm_addrlo[ETHER_ADDR_LEN]; /* low or only address of range */
182 u_int8_t enm_addrhi[ETHER_ADDR_LEN]; /* high or only address of range */
183 struct arpcom *enm_ac; /* back pointer to arpcom */
184 u_int enm_refcount; /* no. claims to this addr/range */
185 LIST_ENTRY(ether_multi) enm_list;
186};
187
188/*
189 * Structure used by macros below to remember position when stepping through
190 * all of the ether_multi records.
191 */
192struct ether_multistep {
193 struct ether_multi *e_enm;
194};
195
196/*
197 * Macro for looking up the ether_multi record for a given range of Ethernet
198 * multicast addresses connected to a given arpcom structure. If no matching
199 * record is found, "enm" returns NULL.
200 */
201#define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \
202 /* u_int8_t addrlo[ETHER_ADDR_LEN]; */ \
203 /* u_int8_t addrhi[ETHER_ADDR_LEN]; */ \
204 /* struct arpcom *ac; */ \
205 /* struct ether_multi *enm; */ \
206{ \
207 for ((enm) = (ac)->ac_multiaddrs.lh_first; \
208 (enm) != NULL && \
209 (bcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 || \
210 bcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 0); \
211 (enm) = (enm)->enm_list.le_next); \
212}
213
214/*
215 * Macro to step through all of the ether_multi records, one at a time.
216 * The current position is remembered in "step", which the caller must
217 * provide. ETHER_FIRST_MULTI(), below, must be called to initialize "step"
218 * and get the first record. Both macros return a NULL "enm" when there
219 * are no remaining records.
220 */
221#define ETHER_NEXT_MULTI(step, enm) \
222 /* struct ether_multistep step; */ \
223 /* struct ether_multi *enm; */ \
224{ \
225 if (((enm) = (step).e_enm) != NULL) \
226 (step).e_enm = (enm)->enm_list.le_next; \
227}
228
229#define ETHER_FIRST_MULTI(step, ac, enm) \
230 /* struct ether_multistep step; */ \
231 /* struct arpcom *ac; */ \
232 /* struct ether_multi *enm; */ \
233{ \
234 (step).e_enm = (ac)->ac_multiaddrs.lh_first; \
235 ETHER_NEXT_MULTI((step), (enm)); \
236}
237
238#ifdef _KERNEL
239void arp_rtrequest(int, struct rtentry *, struct sockaddr *);
240int arpresolve(struct arpcom *, struct rtentry *, struct mbuf *,
241 struct sockaddr *, u_char *);
242void arpintr(void);
243int arpioctl(u_long, caddr_t);
244void arp_ifinit(struct arpcom *, struct ifaddr *);
245void revarpinput(struct mbuf *);
246void in_revarpinput(struct mbuf *);
247void revarprequest(struct ifnet *);
248int revarpwhoarewe(struct ifnet *, struct in_addr *, struct in_addr *);
249int revarpwhoami(struct in_addr *, struct ifnet *);
250int db_show_arptab(void);
251#endif
252
253/*
254 * Prototype ethers(3) functions.
255 */
256#ifndef _KERNEL
257#include <sys/cdefs.h>
258__BEGIN_DECLS
259char * ether_ntoa(struct ether_addr *);
260struct ether_addr *
261 ether_aton(char *);
262int ether_ntohost(char *, struct ether_addr *);
263int ether_hostton(char *, struct ether_addr *);
264int ether_line(char *, struct ether_addr *, char *);
265__END_DECLS
266#endif