if_ether.h revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae
/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at 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'' without express or implied warranty.
*/
#ifndef _netinet_if_ether_h
#define _netinet_if_ether_h
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* The following include is for compatibility with SunOS 3.x and
* 4.3bsd. Newly written programs should include it separately.
*/
#include <net/if_arp.h>
/*
* Ethernet address - 6 octets
*/
struct ether_addr {
u_char ether_addr_octet[6];
};
/*
* Structure of a 10Mb/s Ethernet header.
*/
struct ether_header {
struct ether_addr ether_dhost;
struct ether_addr ether_shost;
u_short ether_type;
};
#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
#define ETHERTYPE_IP 0x0800 /* IP protocol */
#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
#define ETHERTYPE_REVARP 0x8035 /* Reverse ARP */
/*
* 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
#define ETHERMTU 1500
#define ETHERMIN (60-14)
/*
* Ethernet Address Resolution Protocol.
*
* See RFC 826 for protocol description. Structure below is adapted
* to resolving internet addresses. Field names used correspond to
* RFC 826.
*/
struct ether_arp {
struct arphdr ea_hdr; /* fixed-size header */
struct ether_addr arp_sha; /* sender hardware address */
u_char arp_spa[4]; /* sender protocol address */
struct ether_addr arp_tha; /* 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
/*
* multicast address structure
*
* Keep a reference count for each multicast address so
* addresses loaded into chip are unique.
*/
struct mcaddr {
struct ether_addr mc_enaddr; /* multicast address */
u_short mc_count; /* reference count */
};
#define MCADDRMAX 64 /* multicast addr table length */
#define MCCOUNTMAX 4096 /* multicast addr max reference count */
/*
* Structure shared between the ethernet driver modules and
* the address resolution code. For example, each ec_softc or il_softc
* begins with this structure.
*
* The structure contains a pointer to an array of multicast addresses.
* This pointer is NULL until the first successful SIOCADDMULTI ioctl
* is issued for the interface.
*/
struct arpcom {
struct ifnet ac_if; /* network-visible interface */
struct ether_addr ac_enaddr; /* ethernet hardware address */
struct in_addr ac_ipaddr; /* copy of ip address- XXX */
struct mcaddr *ac_mcaddr; /* table of multicast addrs */
u_short ac_nmcaddr; /* count of M/C addrs in use */
struct in_addr ac_lastip; /* cache of last ARP lookup */
struct ether_addr ac_lastarp; /* result of the last ARP */
};
/*
* Internet to ethernet address resolution table.
*/
struct arptab {
struct in_addr at_iaddr; /* internet address */
union {
struct ether_addr atu_enaddr; /* ethernet address */
long atu_tvsec; /* timestamp if incomplete */
} at_union;
u_char at_timer; /* minutes since last reference */
u_char at_flags; /* flags */
struct mbuf *at_hold; /* last packet until resolved/timeout */
};
# define at_enaddr at_union.atu_enaddr
# define at_tvsec at_union.atu_tvsec
/*
* Compare two Ethernet addresses - assumes that the two given
* pointers can be referenced as shorts. On architectures
* where this is not the case, use bcmp instead. Note that like
* bcmp, we return zero if they are the SAME.
*/
#define ether_cmp(a,b) ( ((short *)b)[2] != ((short *)a)[2] || \
((short *)b)[1] != ((short *)a)[1] || ((short *)b)[0] != ((short *)a)[0] )
/*
* Copy Ethernet addresses from a to b - assumes that the two given
* pointers can be referenced as shorts. On architectures
* where this is not the case, use bcopy instead.
*/
#define ether_copy(a,b) { ((short *)b)[0]=((short *)a)[0]; \
((short *)b)[1]=((short *)a)[1]; ((short *)b)[2]=((short *)a)[2]; }
/*
* Copy IP addresses from a to b - assumes that the two given
* pointers can be referenced as shorts. On architectures
* where this is not the case, use bcopy instead.
*/
#define ip_copy(a,b) { ((short *)b)[0]=((short *)a)[0]; \
((short *)b)[1]=((short *)a)[1]; }
#endif /* !_netinet_if_ether_h */