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 1.34 2007/12/31 23:48:06 julian Exp $
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] = ((u_char *)ipaddr)[1] & 0x7f; \
52 (enaddr)[4] = ((u_char *)ipaddr)[2]; \
53 (enaddr)[5] = ((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] = ((u_char *)ip6addr)[12]; \
67 (enaddr)[3] = ((u_char *)ip6addr)[13]; \
68 (enaddr)[4] = ((u_char *)ip6addr)[14]; \
69 (enaddr)[5] = ((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 */
79 struct 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 struct sockaddr_inarp {
93 u_char sin_len;
94 u_char sin_family;
95 u_short sin_port;
96 struct in_addr sin_addr;
97 struct in_addr sin_srcaddr;
98 u_short sin_tos;
99 u_short sin_other;
100 #define SIN_PROXY 1
101 };
102 /*
103 * IP and ethernet specific routing flags
104 */
105 #define RTF_USETRAILERS RTF_PROTO1 /* use trailers */
106 #define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */
107
108 #ifdef _KERNEL
109 extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN];
110 extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN];
111
112 int arpresolve(struct ifnet *ifp, struct rtentry *rt,
113 struct mbuf *m, struct sockaddr *dst, u_char *desten);
114 void arp_ifinit(struct ifnet *, struct ifaddr *);
115 void arp_ifinit2(struct ifnet *, struct ifaddr *, u_char *);
116 #endif
117
118 #endif
119
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