1*23173Smckusick /* 2*23173Smckusick * Copyright (c) 1982 Regents of the University of California. 3*23173Smckusick * All rights reserved. The Berkeley software License Agreement 4*23173Smckusick * specifies the terms and conditions for redistribution. 5*23173Smckusick * 6*23173Smckusick * @(#)if_ether.h 6.5 (Berkeley) 06/08/85 7*23173Smckusick */ 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 249746Ssam * (type-ETHERPUP_TRAIL)*512 bytes of data followed 259744Ssam * by a PUP 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 { 4111573Ssam u_short arp_hrd; /* format of hardware address */ 4211573Ssam #define ARPHRD_ETHER 1 /* ethernet hardware address */ 4311573Ssam u_short arp_pro; /* format of proto. address (ETHERPUP_IPTYPE) */ 4411573Ssam u_char arp_hln; /* length of hardware address (6) */ 4511573Ssam u_char arp_pln; /* length of protocol address (4) */ 4611573Ssam u_short arp_op; 4711573Ssam #define ARPOP_REQUEST 1 /* request to resolve address */ 4811573Ssam #define ARPOP_REPLY 2 /* response to previous request */ 4918641Skarels u_char arp_sha[6]; /* sender hardware address */ 5018641Skarels u_char arp_spa[4]; /* sender protocol address */ 5118641Skarels u_char arp_tha[6]; /* target hardware address */ 5218641Skarels u_char arp_tpa[4]; /* target protocol address */ 5311573Ssam }; 5411573Ssam 5511573Ssam /* 5611573Ssam * Structure shared between the ethernet driver modules and 5711573Ssam * the address resolution code. For example, each ec_softc or il_softc 5811573Ssam * begins with this structure. 5911573Ssam */ 6011573Ssam struct arpcom { 6118641Skarels struct ifnet ac_if; /* network-visible interface */ 6218641Skarels u_char ac_enaddr[6]; /* ethernet hardware address */ 6318641Skarels struct in_addr ac_ipaddr; /* copy of ip address- XXX */ 6411573Ssam }; 6511573Ssam 6616211Skarels /* 6716211Skarels * Internet to ethernet address resolution table. 6816211Skarels */ 6916211Skarels struct arptab { 7016211Skarels struct in_addr at_iaddr; /* internet address */ 7118641Skarels u_char at_enaddr[6]; /* ethernet address */ 7216211Skarels struct mbuf *at_hold; /* last packet until resolved/timeout */ 7316211Skarels u_char at_timer; /* minutes since last reference */ 7416211Skarels u_char at_flags; /* flags */ 7516211Skarels }; 7616211Skarels 7712459Ssam #ifdef KERNEL 7818641Skarels u_char etherbroadcastaddr[6]; 7911573Ssam struct arptab *arptnew(); 8011573Ssam #endif 81