1*18641Skarels /* if_ether.h 6.4 85/04/16 */ 29744Ssam 39744Ssam /* 49744Ssam * Structure of a 10Mb/s Ethernet header. 59744Ssam */ 69746Ssam struct ether_header { 7*18641Skarels u_char ether_dhost[6]; 8*18641Skarels u_char ether_shost[6]; 99746Ssam u_short ether_type; 109744Ssam }; 119744Ssam 12*18641Skarels #define ETHERTYPE_PUP 0x0200 /* PUP protocol */ 13*18641Skarels #define ETHERTYPE_IP 0x0800 /* IP protocol */ 14*18641Skarels #define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */ 159744Ssam 169744Ssam /* 17*18641Skarels * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have 189746Ssam * (type-ETHERPUP_TRAIL)*512 bytes of data followed 199744Ssam * by a PUP type (as given above) and then the (variable-length) header. 209744Ssam */ 21*18641Skarels #define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */ 22*18641Skarels #define ETHERTYPE_NTRAILER 16 239746Ssam 249746Ssam #define ETHERMTU 1500 259746Ssam #define ETHERMIN (60-14) 2611573Ssam 2711573Ssam /* 2811573Ssam * Ethernet Address Resolution Protocol. 2911573Ssam * 3011573Ssam * See RFC 826 for protocol description. Structure below is adapted 3111573Ssam * to resolving internet addresses. Field names used correspond to 3211573Ssam * RFC 826. 3311573Ssam */ 3411573Ssam struct ether_arp { 3511573Ssam u_short arp_hrd; /* format of hardware address */ 3611573Ssam #define ARPHRD_ETHER 1 /* ethernet hardware address */ 3711573Ssam u_short arp_pro; /* format of proto. address (ETHERPUP_IPTYPE) */ 3811573Ssam u_char arp_hln; /* length of hardware address (6) */ 3911573Ssam u_char arp_pln; /* length of protocol address (4) */ 4011573Ssam u_short arp_op; 4111573Ssam #define ARPOP_REQUEST 1 /* request to resolve address */ 4211573Ssam #define ARPOP_REPLY 2 /* response to previous request */ 43*18641Skarels u_char arp_sha[6]; /* sender hardware address */ 44*18641Skarels u_char arp_spa[4]; /* sender protocol address */ 45*18641Skarels u_char arp_tha[6]; /* target hardware address */ 46*18641Skarels u_char arp_tpa[4]; /* target protocol address */ 4711573Ssam }; 4811573Ssam 4911573Ssam /* 5011573Ssam * Structure shared between the ethernet driver modules and 5111573Ssam * the address resolution code. For example, each ec_softc or il_softc 5211573Ssam * begins with this structure. 5311573Ssam */ 5411573Ssam struct arpcom { 55*18641Skarels struct ifnet ac_if; /* network-visible interface */ 56*18641Skarels u_char ac_enaddr[6]; /* ethernet hardware address */ 57*18641Skarels struct in_addr ac_ipaddr; /* copy of ip address- XXX */ 5811573Ssam }; 5911573Ssam 6016211Skarels /* 6116211Skarels * Internet to ethernet address resolution table. 6216211Skarels */ 6316211Skarels struct arptab { 6416211Skarels struct in_addr at_iaddr; /* internet address */ 65*18641Skarels u_char at_enaddr[6]; /* ethernet address */ 6616211Skarels struct mbuf *at_hold; /* last packet until resolved/timeout */ 6716211Skarels u_char at_timer; /* minutes since last reference */ 6816211Skarels u_char at_flags; /* flags */ 6916211Skarels }; 7016211Skarels 7112459Ssam #ifdef KERNEL 72*18641Skarels u_char etherbroadcastaddr[6]; 7311573Ssam struct arptab *arptnew(); 7411573Ssam #endif 75