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33 * @(#)if_ether.h 8.3 (Berkeley) 5/2/95
34 * $FreeBSD: src/sys/netinet/if_ether.h,v 1.24.2.1 2002/02/13 21:38:56 fjoe Exp $
35 * $DragonFly: src/sys/netinet/if_ether.h,v 1.6 2006/05/20 02:42:12 dillon Exp $
38 #ifndef _NETINET_IF_ETHER_H_
39 #define _NETINET_IF_ETHER_H_
41 #ifndef _NET_ETHERNET_H_
42 #include <net/ethernet.h>
44 #ifndef _NET_IF_ARP_H_
45 #include <net/if_arp.h>
47 #ifndef _NETINET_IN_H_
48 #include <netinet/in.h>
52 * Macro to map an IP multicast address to an Ethernet multicast address.
53 * The high-order 25 bits of the Ethernet address are statically assigned,
54 * and the low-order 23 bits are taken from the low end of the IP address.
56 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
57 /* struct in_addr *ipaddr; */ \
58 /* u_char enaddr[ETHER_ADDR_LEN]; */ \
63 (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
64 (enaddr)[4] = ((u_char *)ipaddr)[2]; \
65 (enaddr)[5] = ((u_char *)ipaddr)[3]; \
68 * Macro to map an IP6 multicast address to an Ethernet multicast address.
69 * The high-order 16 bits of the Ethernet address are statically assigned,
70 * and the low-order 32 bits are taken from the low end of the IP6 address.
72 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \
73 /* struct in6_addr *ip6addr; */ \
74 /* u_char enaddr[ETHER_ADDR_LEN]; */ \
78 (enaddr)[2] = ((u_char *)ip6addr)[12]; \
79 (enaddr)[3] = ((u_char *)ip6addr)[13]; \
80 (enaddr)[4] = ((u_char *)ip6addr)[14]; \
81 (enaddr)[5] = ((u_char *)ip6addr)[15]; \
85 * Ethernet Address Resolution Protocol.
87 * See RFC 826 for protocol description. Structure below is adapted
88 * to resolving internet addresses. Field names used correspond to
92 struct arphdr ea_hdr
; /* fixed-size header */
93 u_char arp_sha
[ETHER_ADDR_LEN
]; /* sender hardware address */
94 u_char arp_spa
[4]; /* sender protocol address */
95 u_char arp_tha
[ETHER_ADDR_LEN
]; /* target hardware address */
96 u_char arp_tpa
[4]; /* target protocol address */
98 #define arp_hrd ea_hdr.ar_hrd
99 #define arp_pro ea_hdr.ar_pro
100 #define arp_hln ea_hdr.ar_hln
101 #define arp_pln ea_hdr.ar_pln
102 #define arp_op ea_hdr.ar_op
104 struct sockaddr_inarp
{
108 struct in_addr sin_addr
;
109 struct in_addr sin_srcaddr
;
115 * IP and ethernet specific routing flags
117 #define RTF_USETRAILERS RTF_PROTO1 /* use trailers */
118 #define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */
121 extern u_char ether_ipmulticast_min
[ETHER_ADDR_LEN
];
122 extern u_char ether_ipmulticast_max
[ETHER_ADDR_LEN
];
124 int arpresolve (struct ifnet
*, struct rtentry
*, struct mbuf
*,
125 struct sockaddr
*, u_char
*);
126 void arp_ifinit (struct ifnet
*, struct ifaddr
*);