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 * from: @(#)if_ether.h 7.5 (Berkeley) 6/28/90 34 * $Id: if_ether.h,v 1.3 1993/05/20 03:49:59 cgd Exp $ 35 */ 36 37 #ifndef _NETINET_IF_ETHER_H_ 38 #define _NETINET_IF_ETHER_H_ 39 40 /* 41 * Structure of a 10Mb/s Ethernet header. 42 */ 43 struct ether_header { 44 u_char ether_dhost[6]; 45 u_char ether_shost[6]; 46 u_short ether_type; 47 }; 48 49 #define ETHERTYPE_PUP 0x0200 /* PUP protocol */ 50 #define ETHERTYPE_IP 0x0800 /* IP protocol */ 51 #define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */ 52 53 /* 54 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have 55 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed 56 * by an ETHER type (as given above) and then the (variable-length) header. 57 */ 58 #define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */ 59 #define ETHERTYPE_NTRAILER 16 60 61 #define ETHERMTU 1500 62 #define ETHERMIN (60-14) 63 64 /* 65 * Ethernet Address Resolution Protocol. 66 * 67 * See RFC 826 for protocol description. Structure below is adapted 68 * to resolving internet addresses. Field names used correspond to 69 * RFC 826. 70 */ 71 struct ether_arp { 72 struct arphdr ea_hdr; /* fixed-size header */ 73 u_char arp_sha[6]; /* sender hardware address */ 74 u_char arp_spa[4]; /* sender protocol address */ 75 u_char arp_tha[6]; /* target hardware address */ 76 u_char arp_tpa[4]; /* target protocol address */ 77 }; 78 #define arp_hrd ea_hdr.ar_hrd 79 #define arp_pro ea_hdr.ar_pro 80 #define arp_hln ea_hdr.ar_hln 81 #define arp_pln ea_hdr.ar_pln 82 #define arp_op ea_hdr.ar_op 83 84 85 /* 86 * Structure shared between the ethernet driver modules and 87 * the address resolution code. For example, each ec_softc or il_softc 88 * begins with this structure. 89 */ 90 struct arpcom { 91 struct ifnet ac_if; /* network-visible interface */ 92 u_char ac_enaddr[6]; /* ethernet hardware address */ 93 struct in_addr ac_ipaddr; /* copy of ip address- XXX */ 94 }; 95 96 /* 97 * Internet to ethernet address resolution table. 98 */ 99 struct arptab { 100 struct in_addr at_iaddr; /* internet address */ 101 u_char at_enaddr[6]; /* ethernet address */ 102 u_char at_timer; /* minutes since last reference */ 103 u_char at_flags; /* flags */ 104 struct mbuf *at_hold; /* last packet until resolved/timeout */ 105 }; 106 107 #ifdef KERNEL 108 u_char etherbroadcastaddr[6]; 109 struct arptab *arptnew(); 110 int ether_output(), ether_input(); 111 char *ether_sprintf(); 112 #endif 113 114 #endif /* !_NETINET_IF_ETHER_H_ */ 115