--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Global definitions for the ARP (RFC 826) protocol.
+ *
+ * Version: @(#)if_arp.h 1.0.1 04/16/93
+ *
+ * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
+ * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
+ * Ross Biro
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Florian La Roche,
+ * Jonathan Layes <layes@loran.com>
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _LINUX_IF_ARP_H
+#define _LINUX_IF_ARP_H
+
+#include <linux/netdevice.h>
+
+/* ARP protocol HARDWARE identifiers. */
+#define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */
+#define ARPHRD_ETHER 1 /* Ethernet 10Mbps */
+#define ARPHRD_EETHER 2 /* Experimental Ethernet */
+#define ARPHRD_AX25 3 /* AX.25 Level 2 */
+#define ARPHRD_PRONET 4 /* PROnet token ring */
+#define ARPHRD_CHAOS 5 /* Chaosnet */
+#define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB */
+#define ARPHRD_ARCNET 7 /* ARCnet */
+#define ARPHRD_APPLETLK 8 /* APPLEtalk */
+#define ARPHRD_DLCI 15 /* Frame Relay DLCI */
+#define ARPHRD_ATM 19 /* ATM */
+#define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id) */
+#define ARPHRD_IEEE1394 24 /* IEEE 1394 IPv4 - RFC 2734 */
+#define ARPHRD_EUI64 27 /* EUI-64 */
+#define ARPHRD_INFINIBAND 32 /* InfiniBand */
+
+/* Dummy types for non ARP hardware */
+#define ARPHRD_SLIP 256
+#define ARPHRD_CSLIP 257
+#define ARPHRD_SLIP6 258
+#define ARPHRD_CSLIP6 259
+#define ARPHRD_RSRVD 260 /* Notional KISS type */
+#define ARPHRD_ADAPT 264
+#define ARPHRD_ROSE 270
+#define ARPHRD_X25 271 /* CCITT X.25 */
+#define ARPHRD_HWX25 272 /* Boards with X.25 in firmware */
+#define ARPHRD_CAN 280 /* Controller Area Network */
+#define ARPHRD_PPP 512
+#define ARPHRD_CISCO 513 /* Cisco HDLC */
+#define ARPHRD_HDLC ARPHRD_CISCO
+#define ARPHRD_LAPB 516 /* LAPB */
+#define ARPHRD_DDCMP 517 /* Digital's DDCMP protocol */
+#define ARPHRD_RAWHDLC 518 /* Raw HDLC */
+#define ARPHRD_RAWIP 519 /* Raw IP */
+
+#define ARPHRD_TUNNEL 768 /* IPIP tunnel */
+#define ARPHRD_TUNNEL6 769 /* IP6IP6 tunnel */
+#define ARPHRD_FRAD 770 /* Frame Relay Access Device */
+#define ARPHRD_SKIP 771 /* SKIP vif */
+#define ARPHRD_LOOPBACK 772 /* Loopback device */
+#define ARPHRD_LOCALTLK 773 /* Localtalk device */
+#define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface */
+#define ARPHRD_BIF 775 /* AP1000 BIF */
+#define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4 */
+#define ARPHRD_IPDDP 777 /* IP over DDP tunneller */
+#define ARPHRD_IPGRE 778 /* GRE over IP */
+#define ARPHRD_PIMREG 779 /* PIMSM register interface */
+#define ARPHRD_HIPPI 780 /* High Performance Parallel Interface */
+#define ARPHRD_ASH 781 /* Nexus 64Mbps Ash */
+#define ARPHRD_ECONET 782 /* Acorn Econet */
+#define ARPHRD_IRDA 783 /* Linux-IrDA */
+/* ARP works differently on different FC media .. so */
+#define ARPHRD_FCPP 784 /* Point to point fibrechannel */
+#define ARPHRD_FCAL 785 /* Fibrechannel arbitrated loop */
+#define ARPHRD_FCPL 786 /* Fibrechannel public loop */
+#define ARPHRD_FCFABRIC 787 /* Fibrechannel fabric */
+ /* 787->799 reserved for fibrechannel media types */
+#define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR */
+#define ARPHRD_IEEE80211 801 /* IEEE 802.11 */
+#define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header */
+#define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header */
+#define ARPHRD_IEEE802154 804
+#define ARPHRD_IEEE802154_MONITOR 805 /* IEEE 802.15.4 network monitor */
+
+#define ARPHRD_PHONET 820 /* PhoNet media type */
+#define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */
+#define ARPHRD_CAIF 822 /* CAIF media type */
+#define ARPHRD_IP6GRE 823 /* GRE over IPv6 */
+#define ARPHRD_NETLINK 824 /* Netlink header */
+#define ARPHRD_6LOWPAN 825 /* IPv6 over LoWPAN */
+#define ARPHRD_VSOCKMON 826 /* Vsock monitor header */
+
+#define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */
+#define ARPHRD_NONE 0xFFFE /* zero header length */
+
+/* ARP protocol opcodes. */
+#define ARPOP_REQUEST 1 /* ARP request */
+#define ARPOP_REPLY 2 /* ARP reply */
+#define ARPOP_RREQUEST 3 /* RARP request */
+#define ARPOP_RREPLY 4 /* RARP reply */
+#define ARPOP_InREQUEST 8 /* InARP request */
+#define ARPOP_InREPLY 9 /* InARP reply */
+#define ARPOP_NAK 10 /* (ATM)ARP NAK */
+
+
+/* ARP ioctl request. */
+struct arpreq {
+ struct sockaddr arp_pa; /* protocol address */
+ struct sockaddr arp_ha; /* hardware address */
+ int arp_flags; /* flags */
+ struct sockaddr arp_netmask; /* netmask (only for proxy arps) */
+ char arp_dev[16];
+};
+
+struct arpreq_old {
+ struct sockaddr arp_pa; /* protocol address */
+ struct sockaddr arp_ha; /* hardware address */
+ int arp_flags; /* flags */
+ struct sockaddr arp_netmask; /* netmask (only for proxy arps) */
+};
+
+/* ARP Flag values. */
+#define ATF_COM 0x02 /* completed entry (ha valid) */
+#define ATF_PERM 0x04 /* permanent entry */
+#define ATF_PUBL 0x08 /* publish entry */
+#define ATF_USETRAILERS 0x10 /* has requested trailers */
+#define ATF_NETMASK 0x20 /* want to use a netmask (only
+ for proxy entries) */
+#define ATF_DONTPUB 0x40 /* don't answer this addresses */
+
+/*
+ * This structure defines an ethernet arp header.
+ */
+
+struct arphdr {
+ __be16 ar_hrd; /* format of hardware address */
+ __be16 ar_pro; /* format of protocol address */
+ unsigned char ar_hln; /* length of hardware address */
+ unsigned char ar_pln; /* length of protocol address */
+ __be16 ar_op; /* ARP opcode (command) */
+
+#if 0
+ /*
+ * Ethernet looks like this : This bit is variable sized however...
+ */
+ unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
+ unsigned char ar_sip[4]; /* sender IP address */
+ unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
+ unsigned char ar_tip[4]; /* target IP address */
+#endif
+
+};
+
+
+#endif /* _LINUX_IF_ARP_H */
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