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