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 * $FreeBSD$
31 */
32
33#ifndef _NETINET_IF_ETHER_H_
34#define _NETINET_IF_ETHER_H_
35
36#include <net/ethernet.h>
37#include <net/if_arp.h>
38
39/*
40 * Macro to map an IP multicast address to an Ethernet multicast address.
41 * The high-order 25 bits of the Ethernet address are statically assigned,
42 * and the low-order 23 bits are taken from the low end of the IP address.
43 */
44#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
45	/* struct in_addr *ipaddr; */ \
46	/* u_char enaddr[ETHER_ADDR_LEN];	   */ \
47{ \
48	(enaddr)[0] = 0x01; \
49	(enaddr)[1] = 0x00; \
50	(enaddr)[2] = 0x5e; \
51	(enaddr)[3] = ((const u_char *)ipaddr)[1] & 0x7f; \
52	(enaddr)[4] = ((const u_char *)ipaddr)[2]; \
53	(enaddr)[5] = ((const u_char *)ipaddr)[3]; \
54}
55/*
56 * Macro to map an IP6 multicast address to an Ethernet multicast address.
57 * The high-order 16 bits of the Ethernet address are statically assigned,
58 * and the low-order 32 bits are taken from the low end of the IP6 address.
59 */
60#define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)			\
61/* struct	in6_addr *ip6addr; */					\
62/* u_char	enaddr[ETHER_ADDR_LEN]; */				\
63{                                                                       \
64	(enaddr)[0] = 0x33;						\
65	(enaddr)[1] = 0x33;						\
66	(enaddr)[2] = ((const u_char *)ip6addr)[12];			\
67	(enaddr)[3] = ((const u_char *)ip6addr)[13];			\
68	(enaddr)[4] = ((const u_char *)ip6addr)[14];			\
69	(enaddr)[5] = ((const u_char *)ip6addr)[15];			\
70}
71
72/*
73 * Ethernet Address Resolution Protocol.
74 *
75 * See RFC 826 for protocol description.  Structure below is adapted
76 * to resolving internet addresses.  Field names used correspond to
77 * RFC 826.
78 */
79struct	ether_arp {
80	struct	arphdr ea_hdr;	/* fixed-size header */
81	u_char	arp_sha[ETHER_ADDR_LEN];	/* sender hardware address */
82	u_char	arp_spa[4];	/* sender protocol address */
83	u_char	arp_tha[ETHER_ADDR_LEN];	/* target hardware address */
84	u_char	arp_tpa[4];	/* target protocol address */
85};
86#define	arp_hrd	ea_hdr.ar_hrd
87#define	arp_pro	ea_hdr.ar_pro
88#define	arp_hln	ea_hdr.ar_hln
89#define	arp_pln	ea_hdr.ar_pln
90#define	arp_op	ea_hdr.ar_op
91
92#ifndef BURN_BRIDGES	/* Can be used by third party software. */
93struct sockaddr_inarp {
94	u_char	sin_len;
95	u_char	sin_family;
96	u_short sin_port;
97	struct	in_addr sin_addr;
98	struct	in_addr sin_srcaddr;
99	u_short	sin_tos;
100	u_short	sin_other;
101#define SIN_PROXY 1
102};
103#endif /* !BURN_BRIDGES  */
104
105/*
106 * IP and ethernet specific routing flags
107 */
108#define	RTF_USETRAILERS	RTF_PROTO1	/* use trailers */
109#define RTF_ANNOUNCE	RTF_PROTO2	/* announce new arp entry */
110
111#ifdef	_KERNEL
112extern u_char	ether_ipmulticast_min[ETHER_ADDR_LEN];
113extern u_char	ether_ipmulticast_max[ETHER_ADDR_LEN];
114
115struct ifaddr;
116
117int	arpresolve(struct ifnet *ifp, int is_gw, struct mbuf *m,
118	    const struct sockaddr *dst, u_char *desten, uint32_t *pflags);
119void	arprequest(struct ifnet *, const struct in_addr *,
120	    const struct in_addr *, u_char *);
121void	arp_ifinit(struct ifnet *, struct ifaddr *);
122void	arp_ifinit2(struct ifnet *, struct ifaddr *, u_char *);
123#endif
124
125#endif
126