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92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#)if_ether.h 7.3 (Berkeley) 6/29/88
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*/
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/*
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* Structure of a 10Mb/s Ethernet header.
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*/
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struct ether_header {
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u_char ether_dhost[6];
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u_char ether_shost[6];
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u_short ether_type;
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};
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#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
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#define ETHERTYPE_IP 0x0800 /* IP protocol */
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#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
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/*
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* The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
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* (type-ETHERTYPE_TRAIL)*512 bytes of data followed
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* by an ETHER type (as given above) and then the (variable-length) header.
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*/
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#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
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#define ETHERTYPE_NTRAILER 16
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#define ETHERMTU 1500
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#define ETHERMIN (60-14)
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/*
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* Ethernet Address Resolution Protocol.
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*
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* See RFC 826 for protocol description. Structure below is adapted
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* to resolving internet addresses. Field names used correspond to
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* RFC 826.
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*/
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struct ether_arp {
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struct arphdr ea_hdr; /* fixed-size header */
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u_char arp_sha[6]; /* sender hardware address */
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u_char arp_spa[4]; /* sender protocol address */
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u_char arp_tha[6]; /* target hardware address */
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u_char arp_tpa[4]; /* target protocol address */
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};
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#define arp_hrd ea_hdr.ar_hrd
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#define arp_pro ea_hdr.ar_pro
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#define arp_hln ea_hdr.ar_hln
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#define arp_pln ea_hdr.ar_pln
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#define arp_op ea_hdr.ar_op
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/*
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* Structure shared between the ethernet driver modules and
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* the address resolution code. For example, each ec_softc or il_softc
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* begins with this structure.
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*/
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struct arpcom {
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struct ifnet ac_if; /* network-visible interface */
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u_char ac_enaddr[6]; /* ethernet hardware address */
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struct in_addr ac_ipaddr; /* copy of ip address- XXX */
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};
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/*
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* Internet to ethernet address resolution table.
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*/
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struct arptab {
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struct in_addr at_iaddr; /* internet address */
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u_char at_enaddr[6]; /* ethernet address */
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u_char at_timer; /* minutes since last reference */
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u_char at_flags; /* flags */
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struct mbuf *at_hold; /* last packet until resolved/timeout */
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};
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#ifdef _KERNEL
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u_char etherbroadcastaddr[6];
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struct arptab *arptnew();
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char *ether_sprintf();
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#endif
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