1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2/* 3 * INET An implementation of the TCP/IP protocol suite for the LINUX 4 * operating system. INET is implemented using the BSD Socket 5 * interface as the means of communication with the user level. 6 * 7 * Global definitions for the ARP (RFC 826) protocol. 8 * 9 * Version: @(#)if_arp.h 1.0.1 04/16/93 10 * 11 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988 12 * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source. 13 * Ross Biro 14 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 15 * Florian La Roche, 16 * Jonathan Layes <layes@loran.com> 17 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25 18 * 19 * This program is free software; you can redistribute it and/or 20 * modify it under the terms of the GNU General Public License 21 * as published by the Free Software Foundation; either version 22 * 2 of the License, or (at your option) any later version. 23 */ 24#ifndef _UAPI_LINUX_IF_ARP_H 25#define _UAPI_LINUX_IF_ARP_H 26 27#include <linux/netdevice.h> 28 29/* ARP protocol HARDWARE identifiers. */ 30#define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */ 31#define ARPHRD_ETHER 1 /* Ethernet 10Mbps */ 32#define ARPHRD_EETHER 2 /* Experimental Ethernet */ 33#define ARPHRD_AX25 3 /* AX.25 Level 2 */ 34#define ARPHRD_PRONET 4 /* PROnet token ring */ 35#define ARPHRD_CHAOS 5 /* Chaosnet */ 36#define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB */ 37#define ARPHRD_ARCNET 7 /* ARCnet */ 38#define ARPHRD_APPLETLK 8 /* APPLEtalk */ 39#define ARPHRD_DLCI 15 /* Frame Relay DLCI */ 40#define ARPHRD_ATM 19 /* ATM */ 41#define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id) */ 42#define ARPHRD_IEEE1394 24 /* IEEE 1394 IPv4 - RFC 2734 */ 43#define ARPHRD_EUI64 27 /* EUI-64 */ 44#define ARPHRD_INFINIBAND 32 /* InfiniBand */ 45 46/* Dummy types for non ARP hardware */ 47#define ARPHRD_SLIP 256 48#define ARPHRD_CSLIP 257 49#define ARPHRD_SLIP6 258 50#define ARPHRD_CSLIP6 259 51#define ARPHRD_RSRVD 260 /* Notional KISS type */ 52#define ARPHRD_ADAPT 264 53#define ARPHRD_ROSE 270 54#define ARPHRD_X25 271 /* CCITT X.25 */ 55#define ARPHRD_HWX25 272 /* Boards with X.25 in firmware */ 56#define ARPHRD_CAN 280 /* Controller Area Network */ 57#define ARPHRD_MCTP 290 58#define ARPHRD_PPP 512 59#define ARPHRD_CISCO 513 /* Cisco HDLC */ 60#define ARPHRD_HDLC ARPHRD_CISCO 61#define ARPHRD_LAPB 516 /* LAPB */ 62#define ARPHRD_DDCMP 517 /* Digital's DDCMP protocol */ 63#define ARPHRD_RAWHDLC 518 /* Raw HDLC */ 64#define ARPHRD_RAWIP 519 /* Raw IP */ 65 66#define ARPHRD_TUNNEL 768 /* IPIP tunnel */ 67#define ARPHRD_TUNNEL6 769 /* IP6IP6 tunnel */ 68#define ARPHRD_FRAD 770 /* Frame Relay Access Device */ 69#define ARPHRD_SKIP 771 /* SKIP vif */ 70#define ARPHRD_LOOPBACK 772 /* Loopback device */ 71#define ARPHRD_LOCALTLK 773 /* Localtalk device */ 72#define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface */ 73#define ARPHRD_BIF 775 /* AP1000 BIF */ 74#define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4 */ 75#define ARPHRD_IPDDP 777 /* IP over DDP tunneller */ 76#define ARPHRD_IPGRE 778 /* GRE over IP */ 77#define ARPHRD_PIMREG 779 /* PIMSM register interface */ 78#define ARPHRD_HIPPI 780 /* High Performance Parallel Interface */ 79#define ARPHRD_ASH 781 /* Nexus 64Mbps Ash */ 80#define ARPHRD_ECONET 782 /* Acorn Econet */ 81#define ARPHRD_IRDA 783 /* Linux-IrDA */ 82/* ARP works differently on different FC media .. so */ 83#define ARPHRD_FCPP 784 /* Point to point fibrechannel */ 84#define ARPHRD_FCAL 785 /* Fibrechannel arbitrated loop */ 85#define ARPHRD_FCPL 786 /* Fibrechannel public loop */ 86#define ARPHRD_FCFABRIC 787 /* Fibrechannel fabric */ 87 /* 787->799 reserved for fibrechannel media types */ 88#define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR */ 89#define ARPHRD_IEEE80211 801 /* IEEE 802.11 */ 90#define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header */ 91#define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header */ 92#define ARPHRD_IEEE802154 804 93#define ARPHRD_IEEE802154_MONITOR 805 /* IEEE 802.15.4 network monitor */ 94 95#define ARPHRD_PHONET 820 /* PhoNet media type */ 96#define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */ 97#define ARPHRD_CAIF 822 /* CAIF media type */ 98#define ARPHRD_IP6GRE 823 /* GRE over IPv6 */ 99#define ARPHRD_NETLINK 824 /* Netlink header */ 100#define ARPHRD_6LOWPAN 825 /* IPv6 over LoWPAN */ 101#define ARPHRD_VSOCKMON 826 /* Vsock monitor header */ 102 103#define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */ 104#define ARPHRD_NONE 0xFFFE /* zero header length */ 105 106/* ARP protocol opcodes. */ 107#define ARPOP_REQUEST 1 /* ARP request */ 108#define ARPOP_REPLY 2 /* ARP reply */ 109#define ARPOP_RREQUEST 3 /* RARP request */ 110#define ARPOP_RREPLY 4 /* RARP reply */ 111#define ARPOP_InREQUEST 8 /* InARP request */ 112#define ARPOP_InREPLY 9 /* InARP reply */ 113#define ARPOP_NAK 10 /* (ATM)ARP NAK */ 114 115 116/* ARP ioctl request. */ 117struct arpreq { 118 struct sockaddr arp_pa; /* protocol address */ 119 struct sockaddr arp_ha; /* hardware address */ 120 int arp_flags; /* flags */ 121 struct sockaddr arp_netmask; /* netmask (only for proxy arps) */ 122 char arp_dev[IFNAMSIZ]; 123}; 124 125struct arpreq_old { 126 struct sockaddr arp_pa; /* protocol address */ 127 struct sockaddr arp_ha; /* hardware address */ 128 int arp_flags; /* flags */ 129 struct sockaddr arp_netmask; /* netmask (only for proxy arps) */ 130}; 131 132/* ARP Flag values. */ 133#define ATF_COM 0x02 /* completed entry (ha valid) */ 134#define ATF_PERM 0x04 /* permanent entry */ 135#define ATF_PUBL 0x08 /* publish entry */ 136#define ATF_USETRAILERS 0x10 /* has requested trailers */ 137#define ATF_NETMASK 0x20 /* want to use a netmask (only 138 for proxy entries) */ 139#define ATF_DONTPUB 0x40 /* don't answer this addresses */ 140 141/* 142 * This structure defines an ethernet arp header. 143 */ 144 145struct arphdr { 146 __be16 ar_hrd; /* format of hardware address */ 147 __be16 ar_pro; /* format of protocol address */ 148 unsigned char ar_hln; /* length of hardware address */ 149 unsigned char ar_pln; /* length of protocol address */ 150 __be16 ar_op; /* ARP opcode (command) */ 151 152#if 0 153 /* 154 * Ethernet looks like this : This bit is variable sized however... 155 */ 156 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ 157 unsigned char ar_sip[4]; /* sender IP address */ 158 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ 159 unsigned char ar_tip[4]; /* target IP address */ 160#endif 161 162}; 163 164 165#endif /* _UAPI_LINUX_IF_ARP_H */ 166