[linux.git] / include / linux / if_arp.h

/*
 * 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, <[email protected]>
 *		Florian La Roche,
 *		Jonathan Layes <[email protected]>
 *		Arnaldo Carvalho de Melo <[email protected]> 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_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_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

};

#ifdef __KERNEL__
#include <linux/skbuff.h>

static inline struct arphdr *arp_hdr(const struct sk_buff *skb)
{
	return (struct arphdr *)skb_network_header(skb);
}

static inline int arp_hdr_len(struct net_device *dev)
{
	/* ARP header, plus 2 device addresses, plus 2 IP addresses. */
	return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2;
}
#endif

#endif	/* _LINUX_IF_ARP_H */
Commit	Line	Data
1da177e4 LT	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.
02c30a84	12	* Ross Biro
1da177e4 LT	13	* Fred N. van Kempen, <[email protected]>
	14	* Florian La Roche,
	15	* Jonathan Layes <[email protected]>
	16	* Arnaldo Carvalho de Melo <[email protected]> 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 */
cd05acfe	55	#define ARPHRD_CAN 280 /* Controller Area Network */
1da177e4 LT	56	#define ARPHRD_PPP 512
	57	#define ARPHRD_CISCO 513 /* Cisco HDLC */
	58	#define ARPHRD_HDLC ARPHRD_CISCO
	59	#define ARPHRD_LAPB 516 /* LAPB */
	60	#define ARPHRD_DDCMP 517 /* Digital's DDCMP protocol */
	61	#define ARPHRD_RAWHDLC 518 /* Raw HDLC */
	62
	63	#define ARPHRD_TUNNEL 768 /* IPIP tunnel */
	64	#define ARPHRD_TUNNEL6 769 /* IP6IP6 tunnel */
	65	#define ARPHRD_FRAD 770 /* Frame Relay Access Device */
	66	#define ARPHRD_SKIP 771 /* SKIP vif */
	67	#define ARPHRD_LOOPBACK 772 /* Loopback device */
	68	#define ARPHRD_LOCALTLK 773 /* Localtalk device */
	69	#define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface */
	70	#define ARPHRD_BIF 775 /* AP1000 BIF */
	71	#define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4 */
	72	#define ARPHRD_IPDDP 777 /* IP over DDP tunneller */
	73	#define ARPHRD_IPGRE 778 /* GRE over IP */
	74	#define ARPHRD_PIMREG 779 /* PIMSM register interface */
	75	#define ARPHRD_HIPPI 780 /* High Performance Parallel Interface */
	76	#define ARPHRD_ASH 781 /* Nexus 64Mbps Ash */
	77	#define ARPHRD_ECONET 782 /* Acorn Econet */
	78	#define ARPHRD_IRDA 783 /* Linux-IrDA */
	79	/* ARP works differently on different FC media .. so */
	80	#define ARPHRD_FCPP 784 /* Point to point fibrechannel */
	81	#define ARPHRD_FCAL 785 /* Fibrechannel arbitrated loop */
	82	#define ARPHRD_FCPL 786 /* Fibrechannel public loop */
	83	#define ARPHRD_FCFABRIC 787 /* Fibrechannel fabric */
	84	/* 787->799 reserved for fibrechannel media types */
37c106d0	85	#define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR */
1da177e4 LT	86	#define ARPHRD_IEEE80211 801 /* IEEE 802.11 */
1da177e4 LT	87	#define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header */
3905ec45	88	#define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header */
fcb94e42	89	#define ARPHRD_IEEE802154 804
0606069d	90	#define ARPHRD_IEEE802154_MONITOR 805 /* IEEE 802.15.4 network monitor */
1da177e4	91
2d91d78b	92	#define ARPHRD_PHONET 820 /* PhoNet media type */
57c81fff	93	#define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */
70596b61	94	#define ARPHRD_CAIF 822 /* CAIF media type */
2d91d78b	95
1da177e4 LT	96	#define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */
	97	#define ARPHRD_NONE 0xFFFE /* zero header length */
	98
	99	/* ARP protocol opcodes. */
	100	#define ARPOP_REQUEST 1 /* ARP request */
	101	#define ARPOP_REPLY 2 /* ARP reply */
	102	#define ARPOP_RREQUEST 3 /* RARP request */
	103	#define ARPOP_RREPLY 4 /* RARP reply */
	104	#define ARPOP_InREQUEST 8 /* InARP request */
	105	#define ARPOP_InREPLY 9 /* InARP reply */
	106	#define ARPOP_NAK 10 /* (ATM)ARP NAK */
	107
	108
	109	/* ARP ioctl request. */
	110	struct arpreq {
	111	struct sockaddr arp_pa; /* protocol address */
	112	struct sockaddr arp_ha; /* hardware address */
	113	int arp_flags; /* flags */
	114	struct sockaddr arp_netmask; /* netmask (only for proxy arps) */
	115	char arp_dev[16];
	116	};
	117
	118	struct arpreq_old {
	119	struct sockaddr arp_pa; /* protocol address */
	120	struct sockaddr arp_ha; /* hardware address */
	121	int arp_flags; /* flags */
	122	struct sockaddr arp_netmask; /* netmask (only for proxy arps) */
	123	};
	124
	125	/* ARP Flag values. */
	126	#define ATF_COM 0x02 /* completed entry (ha valid) */
	127	#define ATF_PERM 0x04 /* permanent entry */
	128	#define ATF_PUBL 0x08 /* publish entry */
	129	#define ATF_USETRAILERS 0x10 /* has requested trailers */
	130	#define ATF_NETMASK 0x20 /* want to use a netmask (only
	131	for proxy entries) */
	132	#define ATF_DONTPUB 0x40 /* don't answer this addresses */
	133
	134	/*
	135	* This structure defines an ethernet arp header.
	136	*/
	137
d94d9fee	138	struct arphdr {
bd6d610a AV	139	__be16 ar_hrd; /* format of hardware address */
bd6d610a AV	140	__be16 ar_pro; /* format of protocol address */
1da177e4 LT	141	unsigned char ar_hln; /* length of hardware address */
1da177e4 LT	142	unsigned char ar_pln; /* length of protocol address */
bd6d610a	143	__be16 ar_op; /* ARP opcode (command) */
1da177e4 LT	144
	145	#if 0
	146	/*
	147	* Ethernet looks like this : This bit is variable sized however...
	148	*/
	149	unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
	150	unsigned char ar_sip[4]; /* sender IP address */
	151	unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
	152	unsigned char ar_tip[4]; /* target IP address */
	153	#endif
	154
	155	};
	156
d0a92be0 ACM	157	#ifdef __KERNEL__
	158	#include <linux/skbuff.h>
	159
	160	static inline struct arphdr arp_hdr(const struct sk_buff skb)
	161	{
	162	return (struct arphdr *)skb_network_header(skb);
	163	}
988b7050 PE	164
	165	static inline int arp_hdr_len(struct net_device *dev)
	166	{
	167	/* ARP header, plus 2 device addresses, plus 2 IP addresses. */
	168	return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2;
	169	}
d0a92be0 ACM	170	#endif
d0a92be0 ACM	171
1da177e4	172	#endif /* _LINUX_IF_ARP_H */