* Copyright (c) 1982, 1986 Regents of the University of California.
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
* @(#)if_ether.h 7.3 (Berkeley) 6/29/88
* Structure of a 10Mb/s Ethernet header.
#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
#define ETHERTYPE_IP 0x0800 /* IP protocol */
#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
* The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
* (type-ETHERTYPE_TRAIL)*512 bytes of data followed
* by an ETHER type (as given above) and then the (variable-length) header.
#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
#define ETHERTYPE_NTRAILER 16
* Ethernet Address Resolution Protocol.
* See RFC 826 for protocol description. Structure below is adapted
* to resolving internet addresses. Field names used correspond to
struct arphdr ea_hdr
; /* fixed-size header */
u_char arp_sha
[6]; /* sender hardware address */
u_char arp_spa
[4]; /* sender protocol address */
u_char arp_tha
[6]; /* target hardware address */
u_char arp_tpa
[4]; /* target protocol address */
#define arp_hrd ea_hdr.ar_hrd
#define arp_pro ea_hdr.ar_pro
#define arp_hln ea_hdr.ar_hln
#define arp_pln ea_hdr.ar_pln
#define arp_op ea_hdr.ar_op
* Structure shared between the ethernet driver modules and
* the address resolution code. For example, each ec_softc or il_softc
* begins with this structure.
struct ifnet ac_if
; /* network-visible interface */
u_char ac_enaddr
[6]; /* ethernet hardware address */
struct in_addr ac_ipaddr
; /* copy of ip address- XXX */
* Internet to ethernet address resolution table.
struct in_addr at_iaddr
; /* internet address */
u_char at_enaddr
[6]; /* ethernet address */
u_char at_timer
; /* minutes since last reference */
u_char at_flags
; /* flags */
struct mbuf
*at_hold
; /* last packet until resolved/timeout */
u_char etherbroadcastaddr
[6];
struct arptab
*arptnew();