1 /* if_ether.h 4.4 83/03/15 */ 2 3 /* 4 * Structure of a 10Mb/s Ethernet header. 5 */ 6 struct ether_header { 7 u_char ether_dhost[6]; 8 u_char ether_shost[6]; 9 u_short ether_type; 10 }; 11 12 #define ETHERPUP_PUPTYPE 0x0400 /* PUP protocol */ 13 #define ETHERPUP_IPTYPE 0x0800 /* IP protocol */ 14 #define ETHERPUP_ARPTYPE 0x0806 /* Addr. resolution protocol */ 15 16 /* 17 * The ETHERPUP_NTRAILER packet types starting at ETHERPUP_TRAIL have 18 * (type-ETHERPUP_TRAIL)*512 bytes of data followed 19 * by a PUP type (as given above) and then the (variable-length) header. 20 */ 21 #define ETHERPUP_TRAIL 0x1000 /* Trailer PUP */ 22 #define ETHERPUP_NTRAILER 16 23 24 #define ETHERMTU 1500 25 #define ETHERMIN (60-14) 26 27 u_char etherbroadcastaddr[6]; /* 6 bytes of 0xFF */ 28 29 /* 30 * Ethernet Address Resolution Protocol. 31 * 32 * See RFC 826 for protocol description. Structure below is adapted 33 * to resolving internet addresses. Field names used correspond to 34 * RFC 826. 35 */ 36 struct ether_arp { 37 u_short arp_hrd; /* format of hardware address */ 38 #define ARPHRD_ETHER 1 /* ethernet hardware address */ 39 u_short arp_pro; /* format of proto. address (ETHERPUP_IPTYPE) */ 40 u_char arp_hln; /* length of hardware address (6) */ 41 u_char arp_pln; /* length of protocol address (4) */ 42 u_short arp_op; 43 #define ARPOP_REQUEST 1 /* request to resolve address */ 44 #define ARPOP_REPLY 2 /* response to previous request */ 45 u_char arp_sha[6]; /* sender hardware address */ 46 u_char arp_spa[4]; /* sender protocol address */ 47 u_char arp_tha[6]; /* target hardware address */ 48 u_char arp_tpa[4]; /* target protocol address */ 49 }; 50 51 #ifdef KERNEL 52 /* 53 * Structure shared between the ethernet driver modules and 54 * the address resolution code. For example, each ec_softc or il_softc 55 * begins with this structure. 56 */ 57 struct arpcom { 58 struct ifnet ac_if; /* network-visible interface */ 59 u_char ac_enaddr[6]; /* ethernet hardware address */ 60 struct arpcom *ac_ac; /* link to next ether driver */ 61 }; 62 63 struct in_addr arpmyaddr(); 64 struct arptab *arptnew(); 65 #endif 66