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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Global definitions for the ARP (RFC 826) protocol.
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*
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* Version: @(#)if_arp.h 1.0.2 08/12/96
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*
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* Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
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* Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
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* Ross Biro, <bir7@leland.Stanford.Edu>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Florian La Roche,
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* Jonathan Layes, <layes@loran.com>
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* Lawrence V. Stefani, <stefani@lkg.dec.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_IF_ARP_H
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#define _LINUX_IF_ARP_H
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#include <linux/netdevice.h>
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/* ARP protocol HARDWARE identifiers. */
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#define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */
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#define ARPHRD_ETHER 1 /* Ethernet 10Mbps */
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#define ARPHRD_EETHER 2 /* Experimental Ethernet */
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#define ARPHRD_AX25 3 /* AX.25 Level 2 */
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#define ARPHRD_PRONET 4 /* PROnet token ring */
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#define ARPHRD_CHAOS 5 /* Chaosnet */
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#define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB */
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#define ARPHRD_ARCNET 7 /* ARCnet */
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#define ARPHRD_APPLETLK 8 /* APPLEtalk */
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#define ARPHRD_DLCI 15 /* Frame Relay DLCI */
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#define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id) */
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/* Dummy types for non ARP hardware */
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#define ARPHRD_SLIP 256
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#define ARPHRD_CSLIP 257
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#define ARPHRD_SLIP6 258
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#define ARPHRD_CSLIP6 259
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#define ARPHRD_RSRVD 260 /* Notional KISS type */
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#define ARPHRD_ADAPT 264
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#define ARPHRD_ROSE 270
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#define ARPHRD_PPP 512
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#define ARPHRD_TUNNEL 768 /* IPIP tunnel */
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#define ARPHRD_TUNNEL6 769 /* IPIP6 tunnel */
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#define ARPHRD_FRAD 770 /* Frame Relay Access Device */
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#define ARPHRD_SKIP 771 /* SKIP vif */
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#define ARPHRD_LOOPBACK 772 /* Loopback device */
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#define ARPHRD_LOCALTLK 773 /* Localtalk device */
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#define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface */
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/* ARP protocol opcodes. */
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#define ARPOP_REQUEST 1 /* ARP request */
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#define ARPOP_REPLY 2 /* ARP reply */
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#define ARPOP_RREQUEST 3 /* RARP request */
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#define ARPOP_RREPLY 4 /* RARP reply */
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/* ARP ioctl request. */
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struct arpreq {
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struct sockaddr arp_pa; /* protocol address */
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struct sockaddr arp_ha; /* hardware address */
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int arp_flags; /* flags */
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struct sockaddr arp_netmask; /* netmask (only for proxy arps) */
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char arp_dev[16];
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};
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struct arpreq_old {
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struct sockaddr arp_pa; /* protocol address */
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struct sockaddr arp_ha; /* hardware address */
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int arp_flags; /* flags */
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struct sockaddr arp_netmask; /* netmask (only for proxy arps) */
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};
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/* ARP Flag values. */
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#define ATF_COM 0x02 /* completed entry (ha valid) */
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#define ATF_PERM 0x04 /* permanent entry */
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#define ATF_PUBL 0x08 /* publish entry */
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#define ATF_USETRAILERS 0x10 /* has requested trailers */
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#define ATF_NETMASK 0x20 /* want to use a netmask (only
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for proxy entries) */
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/*
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* This structure defines an ethernet arp header.
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*/
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struct arphdr
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{
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unsigned short ar_hrd; /* format of hardware address */
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unsigned short ar_pro; /* format of protocol address */
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unsigned char ar_hln; /* length of hardware address */
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unsigned char ar_pln; /* length of protocol address */
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unsigned short ar_op; /* ARP opcode (command) */
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#if 0
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/*
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* Ethernet looks like this : This bit is variable sized however...
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*/
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unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
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unsigned char ar_sip[4]; /* sender IP address */
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unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
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unsigned char ar_tip[4]; /* target IP address */
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#endif
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};
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/* Support for the user space arp daemon, arpd */
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#define ARPD_UPDATE 0x01
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#define ARPD_LOOKUP 0x02
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#define ARPD_FLUSH 0x03
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struct arpd_request
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{
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unsigned short req; /* request type */
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__u32 ip; /* ip address of entry */
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unsigned long dev; /* Device entry is tied to */
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unsigned long stamp;
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unsigned long updated;
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unsigned char ha[MAX_ADDR_LEN]; /* Hardware address */
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};
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#endif /* _LINUX_IF_ARP_H */
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