1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Global definitions for the ARP (RFC 826) protocol. 7 * 8 * Version: @(#)if_arp.h 1.0.1 04/16/93 9 * 10 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988 11 * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source. 12 * Ross Biro 13 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 14 * Florian La Roche, 15 * Jonathan Layes <layes@loran.com> 16 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25 17 * 18 * This program is free software; you can redistribute it and/or 19 * modify it under the terms of the GNU General Public License 20 * as published by the Free Software Foundation; either version 21 * 2 of the License, or (at your option) any later version. 22 */ 23 #ifndef _LINUX_IF_ARP_H 24 #define _LINUX_IF_ARP_H 25 26 /* ARP protocol HARDWARE identifiers. */ 27 #define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */ 28 #define ARPHRD_ETHER 1 /* Ethernet 10Mbps */ 29 #define ARPHRD_EETHER 2 /* Experimental Ethernet */ 30 #define ARPHRD_AX25 3 /* AX.25 Level 2 */ 31 #define ARPHRD_PRONET 4 /* PROnet token ring */ 32 #define ARPHRD_CHAOS 5 /* Chaosnet */ 33 #define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB */ 34 #define ARPHRD_ARCNET 7 /* ARCnet */ 35 #define ARPHRD_APPLETLK 8 /* APPLEtalk */ 36 #define ARPHRD_DLCI 15 /* Frame Relay DLCI */ 37 #define ARPHRD_ATM 19 /* ATM */ 38 #define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id) */ 39 #define ARPHRD_IEEE1394 24 /* IEEE 1394 IPv4 - RFC 2734 */ 40 #define ARPHRD_EUI64 27 /* EUI-64 */ 41 #define ARPHRD_INFINIBAND 32 /* InfiniBand */ 42 43 /* Dummy types for non ARP hardware */ 44 #define ARPHRD_SLIP 256 45 #define ARPHRD_CSLIP 257 46 #define ARPHRD_SLIP6 258 47 #define ARPHRD_CSLIP6 259 48 #define ARPHRD_RSRVD 260 /* Notional KISS type */ 49 #define ARPHRD_ADAPT 264 50 #define ARPHRD_ROSE 270 51 #define ARPHRD_X25 271 /* CCITT X.25 */ 52 #define ARPHRD_HWX25 272 /* Boards with X.25 in firmware */ 53 #define ARPHRD_CAN 280 /* Controller Area Network */ 54 #define ARPHRD_PPP 512 55 #define ARPHRD_CISCO 513 /* Cisco HDLC */ 56 #define ARPHRD_HDLC ARPHRD_CISCO 57 #define ARPHRD_LAPB 516 /* LAPB */ 58 #define ARPHRD_DDCMP 517 /* Digital's DDCMP protocol */ 59 #define ARPHRD_RAWHDLC 518 /* Raw HDLC */ 60 61 #define ARPHRD_TUNNEL 768 /* IPIP tunnel */ 62 #define ARPHRD_TUNNEL6 769 /* IP6IP6 tunnel */ 63 #define ARPHRD_FRAD 770 /* Frame Relay Access Device */ 64 #define ARPHRD_SKIP 771 /* SKIP vif */ 65 #define ARPHRD_LOOPBACK 772 /* Loopback device */ 66 #define ARPHRD_LOCALTLK 773 /* Localtalk device */ 67 #define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface */ 68 #define ARPHRD_BIF 775 /* AP1000 BIF */ 69 #define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4 */ 70 #define ARPHRD_IPDDP 777 /* IP over DDP tunneller */ 71 #define ARPHRD_IPGRE 778 /* GRE over IP */ 72 #define ARPHRD_PIMREG 779 /* PIMSM register interface */ 73 #define ARPHRD_HIPPI 780 /* High Performance Parallel Interface */ 74 #define ARPHRD_ASH 781 /* Nexus 64Mbps Ash */ 75 #define ARPHRD_ECONET 782 /* Acorn Econet */ 76 #define ARPHRD_IRDA 783 /* Linux-IrDA */ 77 /* ARP works differently on different FC media .. so */ 78 #define ARPHRD_FCPP 784 /* Point to point fibrechannel */ 79 #define ARPHRD_FCAL 785 /* Fibrechannel arbitrated loop */ 80 #define ARPHRD_FCPL 786 /* Fibrechannel public loop */ 81 #define ARPHRD_FCFABRIC 787 /* Fibrechannel fabric */ 82 /* 787->799 reserved for fibrechannel media types */ 83 #define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR */ 84 #define ARPHRD_IEEE80211 801 /* IEEE 802.11 */ 85 #define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header */ 86 #define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header */ 87 88 #define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */ 89 #define ARPHRD_NONE 0xFFFE /* zero header length */ 90 91 /* ARP protocol opcodes. */ 92 #define ARPOP_REQUEST 1 /* ARP request */ 93 #define ARPOP_REPLY 2 /* ARP reply */ 94 #define ARPOP_RREQUEST 3 /* RARP request */ 95 #define ARPOP_RREPLY 4 /* RARP reply */ 96 #define ARPOP_InREQUEST 8 /* InARP request */ 97 #define ARPOP_InREPLY 9 /* InARP reply */ 98 #define ARPOP_NAK 10 /* (ATM)ARP NAK */ 99 100 101 /* ARP Flag values. */ 102 #define ATF_COM 0x02 /* completed entry (ha valid) */ 103 #define ATF_PERM 0x04 /* permanent entry */ 104 #define ATF_PUBL 0x08 /* publish entry */ 105 #define ATF_USETRAILERS 0x10 /* has requested trailers */ 106 #define ATF_NETMASK 0x20 /* want to use a netmask (only 107 for proxy entries) */ 108 #define ATF_DONTPUB 0x40 /* don't answer this addresses */ 109 110 typedef unsigned short __be16; 111 112 /* 113 * This structure defines an ethernet arp header. 114 */ 115 struct arphdr 116 { 117 __be16 ar_hrd; /* format of hardware address */ 118 __be16 ar_pro; /* format of protocol address */ 119 unsigned char ar_hln; /* length of hardware address */ 120 unsigned char ar_pln; /* length of protocol address */ 121 __be16 ar_op; /* ARP opcode (command) */ 122 123 #if 0 124 /* 125 * Ethernet looks like this : This bit is variable sized however... 126 */ 127 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ 128 unsigned char ar_sip[4]; /* sender IP address */ 129 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ 130 unsigned char ar_tip[4]; /* target IP address */ 131 #endif 132 133 }; 134 135 /* 136 * This structure defines an ethernet arp header. 137 */ 138 struct arp_eth_ipv4 139 { 140 __be16 ar_hrd; /* format of hardware address */ 141 __be16 ar_pro; /* format of protocol address */ 142 unsigned char ar_hln; /* length of hardware address */ 143 unsigned char ar_pln; /* length of protocol address */ 144 __be16 ar_op; /* ARP opcode (command) */ 145 146 unsigned char ar_sha[6]; /* sender hardware address */ 147 unsigned char ar_sip[4]; /* sender IP address */ 148 unsigned char ar_tha[6]; /* target hardware address */ 149 unsigned char ar_tip[4]; /* target IP address */ 150 }; 151 152 153 #endif /* _LINUX_IF_ARP_H */ 154