123173Smckusick /* 229135Smckusick * Copyright (c) 1982, 1986 Regents of the University of California. 332787Sbostic * All rights reserved. 423173Smckusick * 5*44472Sbostic * %sccs.include.redist.c% 632787Sbostic * 7*44472Sbostic * @(#)if_ether.h 7.5 (Berkeley) 06/28/90 823173Smckusick */ 99744Ssam 109744Ssam /* 119744Ssam * Structure of a 10Mb/s Ethernet header. 129744Ssam */ 139746Ssam struct ether_header { 1418641Skarels u_char ether_dhost[6]; 1518641Skarels u_char ether_shost[6]; 169746Ssam u_short ether_type; 179744Ssam }; 189744Ssam 1918641Skarels #define ETHERTYPE_PUP 0x0200 /* PUP protocol */ 2018641Skarels #define ETHERTYPE_IP 0x0800 /* IP protocol */ 2118641Skarels #define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */ 229744Ssam 239744Ssam /* 2418641Skarels * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have 2525891Skarels * (type-ETHERTYPE_TRAIL)*512 bytes of data followed 2625891Skarels * by an ETHER type (as given above) and then the (variable-length) header. 279744Ssam */ 2818641Skarels #define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */ 2918641Skarels #define ETHERTYPE_NTRAILER 16 309746Ssam 319746Ssam #define ETHERMTU 1500 329746Ssam #define ETHERMIN (60-14) 3311573Ssam 3411573Ssam /* 3511573Ssam * Ethernet Address Resolution Protocol. 3611573Ssam * 3711573Ssam * See RFC 826 for protocol description. Structure below is adapted 3811573Ssam * to resolving internet addresses. Field names used correspond to 3911573Ssam * RFC 826. 4011573Ssam */ 4111573Ssam struct ether_arp { 4225891Skarels struct arphdr ea_hdr; /* fixed-size header */ 4318641Skarels u_char arp_sha[6]; /* sender hardware address */ 4418641Skarels u_char arp_spa[4]; /* sender protocol address */ 4518641Skarels u_char arp_tha[6]; /* target hardware address */ 4618641Skarels u_char arp_tpa[4]; /* target protocol address */ 4711573Ssam }; 4825891Skarels #define arp_hrd ea_hdr.ar_hrd 4925891Skarels #define arp_pro ea_hdr.ar_pro 5025891Skarels #define arp_hln ea_hdr.ar_hln 5125891Skarels #define arp_pln ea_hdr.ar_pln 5225891Skarels #define arp_op ea_hdr.ar_op 5311573Ssam 5425891Skarels 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 u_char at_timer; /* minutes since last reference */ 7316211Skarels u_char at_flags; /* flags */ 7424804Skarels struct mbuf *at_hold; /* last packet until resolved/timeout */ 7516211Skarels }; 7616211Skarels 7712459Ssam #ifdef KERNEL 7836819Skarels u_char etherbroadcastaddr[6]; 7911573Ssam struct arptab *arptnew(); 8036819Skarels int ether_output(), ether_input(); 8136819Skarels char *ether_sprintf(); 8211573Ssam #endif 83