1*16211Skarels /* if_ether.h 6.3 84/03/20 */ 29744Ssam 39744Ssam /* 4*16211Skarels * Ethernet address - 6 octets 5*16211Skarels */ 6*16211Skarels struct ether_addr { 7*16211Skarels u_char ether_addr_octet[6]; 8*16211Skarels }; 9*16211Skarels 10*16211Skarels /* 119744Ssam * Structure of a 10Mb/s Ethernet header. 129744Ssam */ 139746Ssam struct ether_header { 14*16211Skarels struct ether_addr ether_dhost; 15*16211Skarels struct ether_addr ether_shost; 169746Ssam u_short ether_type; 179744Ssam }; 189744Ssam 1915105Skarels #define ETHERPUP_PUPTYPE 0x0200 /* PUP protocol */ 209748Ssam #define ETHERPUP_IPTYPE 0x0800 /* IP protocol */ 2111573Ssam #define ETHERPUP_ARPTYPE 0x0806 /* Addr. resolution protocol */ 229744Ssam 239744Ssam /* 249746Ssam * The ETHERPUP_NTRAILER packet types starting at ETHERPUP_TRAIL have 259746Ssam * (type-ETHERPUP_TRAIL)*512 bytes of data followed 269744Ssam * by a PUP type (as given above) and then the (variable-length) header. 279744Ssam */ 289748Ssam #define ETHERPUP_TRAIL 0x1000 /* Trailer PUP */ 299746Ssam #define ETHERPUP_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 { 4211573Ssam u_short arp_hrd; /* format of hardware address */ 4311573Ssam #define ARPHRD_ETHER 1 /* ethernet hardware address */ 4411573Ssam u_short arp_pro; /* format of proto. address (ETHERPUP_IPTYPE) */ 4511573Ssam u_char arp_hln; /* length of hardware address (6) */ 4611573Ssam u_char arp_pln; /* length of protocol address (4) */ 4711573Ssam u_short arp_op; 4811573Ssam #define ARPOP_REQUEST 1 /* request to resolve address */ 4911573Ssam #define ARPOP_REPLY 2 /* response to previous request */ 50*16211Skarels u_char arp_xsha[6]; /* sender hardware address */ 51*16211Skarels u_char arp_xspa[4]; /* sender protocol address */ 52*16211Skarels u_char arp_xtha[6]; /* target hardware address */ 53*16211Skarels u_char arp_xtpa[4]; /* target protocol address */ 5411573Ssam }; 55*16211Skarels #define arp_sha(ea) (*(struct ether_addr *)(ea)->arp_xsha) 56*16211Skarels #define arp_spa(ea) (*(struct in_addr *)(ea)->arp_xspa) 57*16211Skarels #define arp_tha(ea) (*(struct ether_addr *)(ea)->arp_xtha) 58*16211Skarels #define arp_tpa(ea) (*(struct in_addr *)(ea)->arp_xtpa) 5911573Ssam 6011573Ssam /* 6111573Ssam * Structure shared between the ethernet driver modules and 6211573Ssam * the address resolution code. For example, each ec_softc or il_softc 6311573Ssam * begins with this structure. 6411573Ssam */ 6511573Ssam struct arpcom { 6611573Ssam struct ifnet ac_if; /* network-visible interface */ 67*16211Skarels struct ether_addr ac_enaddr; /* ethernet hardware address */ 6811573Ssam }; 6911573Ssam 70*16211Skarels /* 71*16211Skarels * Internet to ethernet address resolution table. 72*16211Skarels */ 73*16211Skarels struct arptab { 74*16211Skarels struct in_addr at_iaddr; /* internet address */ 75*16211Skarels struct ether_addr at_enaddr; /* ethernet address */ 76*16211Skarels struct mbuf *at_hold; /* last packet until resolved/timeout */ 77*16211Skarels u_char at_timer; /* minutes since last reference */ 78*16211Skarels u_char at_flags; /* flags */ 79*16211Skarels }; 80*16211Skarels 8112459Ssam #ifdef KERNEL 82*16211Skarels struct ether_addr etherbroadcastaddr; 8311573Ssam struct arptab *arptnew(); 8411573Ssam #endif 85