123173Smckusick /* 2*29135Smckusick * Copyright (c) 1982, 1986 Regents of the University of California. 323173Smckusick * All rights reserved. The Berkeley software License Agreement 423173Smckusick * specifies the terms and conditions for redistribution. 523173Smckusick * 6*29135Smckusick * @(#)if_ether.h 7.1 (Berkeley) 06/05/86 723173Smckusick */ 89744Ssam 99744Ssam /* 109744Ssam * Structure of a 10Mb/s Ethernet header. 119744Ssam */ 129746Ssam struct ether_header { 1318641Skarels u_char ether_dhost[6]; 1418641Skarels u_char ether_shost[6]; 159746Ssam u_short ether_type; 169744Ssam }; 179744Ssam 1818641Skarels #define ETHERTYPE_PUP 0x0200 /* PUP protocol */ 1918641Skarels #define ETHERTYPE_IP 0x0800 /* IP protocol */ 2018641Skarels #define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */ 219744Ssam 229744Ssam /* 2318641Skarels * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have 2425891Skarels * (type-ETHERTYPE_TRAIL)*512 bytes of data followed 2525891Skarels * by an ETHER type (as given above) and then the (variable-length) header. 269744Ssam */ 2718641Skarels #define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */ 2818641Skarels #define ETHERTYPE_NTRAILER 16 299746Ssam 309746Ssam #define ETHERMTU 1500 319746Ssam #define ETHERMIN (60-14) 3211573Ssam 3311573Ssam /* 3411573Ssam * Ethernet Address Resolution Protocol. 3511573Ssam * 3611573Ssam * See RFC 826 for protocol description. Structure below is adapted 3711573Ssam * to resolving internet addresses. Field names used correspond to 3811573Ssam * RFC 826. 3911573Ssam */ 4011573Ssam struct ether_arp { 4125891Skarels struct arphdr ea_hdr; /* fixed-size header */ 4218641Skarels u_char arp_sha[6]; /* sender hardware address */ 4318641Skarels u_char arp_spa[4]; /* sender protocol address */ 4418641Skarels u_char arp_tha[6]; /* target hardware address */ 4518641Skarels u_char arp_tpa[4]; /* target protocol address */ 4611573Ssam }; 4725891Skarels #define arp_hrd ea_hdr.ar_hrd 4825891Skarels #define arp_pro ea_hdr.ar_pro 4925891Skarels #define arp_hln ea_hdr.ar_hln 5025891Skarels #define arp_pln ea_hdr.ar_pln 5125891Skarels #define arp_op ea_hdr.ar_op 5211573Ssam 5325891Skarels 5411573Ssam /* 5511573Ssam * Structure shared between the ethernet driver modules and 5611573Ssam * the address resolution code. For example, each ec_softc or il_softc 5711573Ssam * begins with this structure. 5811573Ssam */ 5911573Ssam struct arpcom { 6018641Skarels struct ifnet ac_if; /* network-visible interface */ 6118641Skarels u_char ac_enaddr[6]; /* ethernet hardware address */ 6218641Skarels struct in_addr ac_ipaddr; /* copy of ip address- XXX */ 6311573Ssam }; 6411573Ssam 6516211Skarels /* 6616211Skarels * Internet to ethernet address resolution table. 6716211Skarels */ 6816211Skarels struct arptab { 6916211Skarels struct in_addr at_iaddr; /* internet address */ 7018641Skarels u_char at_enaddr[6]; /* ethernet address */ 7116211Skarels u_char at_timer; /* minutes since last reference */ 7216211Skarels u_char at_flags; /* flags */ 7324804Skarels struct mbuf *at_hold; /* last packet until resolved/timeout */ 7416211Skarels }; 7516211Skarels 7612459Ssam #ifdef KERNEL 7718641Skarels u_char etherbroadcastaddr[6]; 7811573Ssam struct arptab *arptnew(); 7925891Skarels char *ether_sprintf(); 8011573Ssam #endif 81