1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)if_ether.h 7.5 (Berkeley) 6/28/90 34 */ 35 36 #ifndef _NETINET_IF_ETHER_H_ 37 #define _NETINET_IF_ETHER_H_ 38 39 /* 40 * Structure of a 10Mb/s Ethernet header. 41 */ 42 struct ether_header { 43 u_char ether_dhost[6]; 44 u_char ether_shost[6]; 45 u_short ether_type; 46 }; 47 48 #define ETHERTYPE_PUP 0x0200 /* PUP protocol */ 49 #define ETHERTYPE_IP 0x0800 /* IP protocol */ 50 #define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */ 51 52 /* 53 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have 54 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed 55 * by an ETHER type (as given above) and then the (variable-length) header. 56 */ 57 #define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */ 58 #define ETHERTYPE_NTRAILER 16 59 60 #define ETHERMTU 1500 61 #define ETHERMIN (60-14) 62 63 /* 64 * Ethernet Address Resolution Protocol. 65 * 66 * See RFC 826 for protocol description. Structure below is adapted 67 * to resolving internet addresses. Field names used correspond to 68 * RFC 826. 69 */ 70 struct ether_arp { 71 struct arphdr ea_hdr; /* fixed-size header */ 72 u_char arp_sha[6]; /* sender hardware address */ 73 u_char arp_spa[4]; /* sender protocol address */ 74 u_char arp_tha[6]; /* target hardware address */ 75 u_char arp_tpa[4]; /* target protocol address */ 76 }; 77 #define arp_hrd ea_hdr.ar_hrd 78 #define arp_pro ea_hdr.ar_pro 79 #define arp_hln ea_hdr.ar_hln 80 #define arp_pln ea_hdr.ar_pln 81 #define arp_op ea_hdr.ar_op 82 83 84 /* 85 * Structure shared between the ethernet driver modules and 86 * the address resolution code. For example, each ec_softc or il_softc 87 * begins with this structure. 88 */ 89 struct arpcom { 90 struct ifnet ac_if; /* network-visible interface */ 91 u_char ac_enaddr[6]; /* ethernet hardware address */ 92 struct in_addr ac_ipaddr; /* copy of ip address- XXX */ 93 }; 94 95 /* 96 * Internet to ethernet address resolution table. 97 */ 98 struct arptab { 99 struct in_addr at_iaddr; /* internet address */ 100 u_char at_enaddr[6]; /* ethernet address */ 101 u_char at_timer; /* minutes since last reference */ 102 u_char at_flags; /* flags */ 103 struct mbuf *at_hold; /* last packet until resolved/timeout */ 104 }; 105 106 #ifdef KERNEL 107 u_char etherbroadcastaddr[6]; 108 struct arptab *arptnew(); 109 int ether_output(), ether_input(); 110 char *ether_sprintf(); 111 #endif 112 113 #endif /* !_NETINET_IF_ETHER_H_ */ 114