1 //==========================================================================
3 // include/netinet/if_ether.h
5 //==========================================================================
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8 // -------------------------------------------
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14 // Portions created by Red Hat are
15 // Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
17 // -------------------------------------------
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20 //==========================================================================
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54 * @(#)if_ether.h 8.3 (Berkeley) 5/2/95
55 * $FreeBSD: src/sys/netinet/if_ether.h,v 1.24 1999/12/29 04:40:58 peter Exp $
58 #ifndef _NETINET_IF_ETHER_H_
59 #define _NETINET_IF_ETHER_H_
61 #include <net/ethernet.h>
62 #include <net/if_arp.h>
65 * Macro to map an IP multicast address to an Ethernet multicast address.
66 * The high-order 25 bits of the Ethernet address are statically assigned,
67 * and the low-order 23 bits are taken from the low end of the IP address.
69 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
70 /* struct in_addr *ipaddr; */ \
71 /* u_char enaddr[ETHER_ADDR_LEN]; */ \
76 (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
77 (enaddr)[4] = ((u_char *)ipaddr)[2]; \
78 (enaddr)[5] = ((u_char *)ipaddr)[3]; \
81 * Macro to map an IP6 multicast address to an Ethernet multicast address.
82 * The high-order 16 bits of the Ethernet address are statically assigned,
83 * and the low-order 32 bits are taken from the low end of the IP6 address.
85 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \
86 /* struct in6_addr *ip6addr; */ \
87 /* u_char enaddr[ETHER_ADDR_LEN]; */ \
91 (enaddr)[2] = ((u_char *)ip6addr)[12]; \
92 (enaddr)[3] = ((u_char *)ip6addr)[13]; \
93 (enaddr)[4] = ((u_char *)ip6addr)[14]; \
94 (enaddr)[5] = ((u_char *)ip6addr)[15]; \
98 * Ethernet Address Resolution Protocol.
100 * See RFC 826 for protocol description. Structure below is adapted
101 * to resolving internet addresses. Field names used correspond to
105 struct arphdr ea_hdr; /* fixed-size header */
106 u_char arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */
107 u_char arp_spa[4]; /* sender protocol address */
108 u_char arp_tha[ETHER_ADDR_LEN]; /* target hardware address */
109 u_char arp_tpa[4]; /* target protocol address */
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
117 struct sockaddr_inarp {
121 struct in_addr sin_addr;
122 struct in_addr sin_srcaddr;
125 u_char _padding[16]; // So this matches in size with struct sockaddr
129 * IP and ethernet specific routing flags
131 #define RTF_USETRAILERS RTF_PROTO1 /* use trailers */
132 #define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */
135 extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN];
136 extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN];
137 extern struct ifqueue arpintrq;
139 int arpresolve __P((struct arpcom *, struct rtentry *, struct mbuf *,
140 struct sockaddr *, u_char *, struct rtentry *));
141 void arp_ifinit __P((struct arpcom *, struct ifaddr *));