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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2/*3 * INET An implementation of the TCP/IP protocol suite for the LINUX4 * operating system. INET is implemented using the BSD Socket5 * 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 04/16/9310 *11 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-198812 * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.13 * Ross Biro14 * 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_HWX2518 *19 * This program is free software; you can redistribute it and/or20 * modify it under the terms of the GNU General Public License21 * as published by the Free Software Foundation; either version22 * 2 of the License, or (at your option) any later version.23 */24#ifndef _UAPI_LINUX_IF_ARP_H25#define _UAPI_LINUX_IF_ARP_H26 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 25648#define ARPHRD_CSLIP 25749#define ARPHRD_SLIP6 25850#define ARPHRD_CSLIP6 25951#define ARPHRD_RSRVD 260 /* Notional KISS type */52#define ARPHRD_ADAPT 26453#define ARPHRD_ROSE 27054#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 29058#define ARPHRD_PPP 51259#define ARPHRD_CISCO 513 /* Cisco HDLC */60#define ARPHRD_HDLC ARPHRD_CISCO61#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 80493#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 (only138 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 0153 /*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#endif161 162};163 164 165#endif /* _UAPI_LINUX_IF_ARP_H */166