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, <bir7@leland.Stanford.Edu>
13  *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
14  *		Florian La Roche,
15  *		Jonathan Layes <layes@loran.com>
16  *		Arnaldo Carvalho de Melo <acme@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		/* IPIP6 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 
88 #define ARPHRD_VOID	  0xFFFF	/* Void type, nothing is known */
89 #define ARPHRD_NONE	  0xFFFE	/* zero header length */
90 
91 /* ARP protocol opcodes. */
92 #define	ARPOP_REQUEST	1		/* ARP request			*/
93 #define	ARPOP_REPLY	2		/* ARP reply			*/
94 #define	ARPOP_RREQUEST	3		/* RARP request			*/
95 #define	ARPOP_RREPLY	4		/* RARP reply			*/
96 #define	ARPOP_InREQUEST	8		/* InARP request		*/
97 #define	ARPOP_InREPLY	9		/* InARP reply			*/
98 #define	ARPOP_NAK	10		/* (ATM)ARP NAK			*/
99 
100 
101 /* ARP ioctl request. */
102 struct arpreq {
103   struct sockaddr	arp_pa;		/* protocol address		*/
104   struct sockaddr	arp_ha;		/* hardware address		*/
105   int			arp_flags;	/* flags			*/
106   struct sockaddr       arp_netmask;    /* netmask (only for proxy arps) */
107   char			arp_dev[16];
108 };
109 
110 struct arpreq_old {
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 };
116 
117 /* ARP Flag values. */
118 #define ATF_COM		0x02		/* completed entry (ha valid)	*/
119 #define	ATF_PERM	0x04		/* permanent entry		*/
120 #define	ATF_PUBL	0x08		/* publish entry		*/
121 #define	ATF_USETRAILERS	0x10		/* has requested trailers	*/
122 #define ATF_NETMASK     0x20            /* want to use a netmask (only
123 					   for proxy entries) */
124 #define ATF_DONTPUB	0x40		/* don't answer this addresses	*/
125 
126 /*
127  *	This structure defines an ethernet arp header.
128  */
129 
130 struct arphdr
131 {
132 	unsigned short	ar_hrd;		/* format of hardware address	*/
133 	unsigned short	ar_pro;		/* format of protocol address	*/
134 	unsigned char	ar_hln;		/* length of hardware address	*/
135 	unsigned char	ar_pln;		/* length of protocol address	*/
136 	unsigned short	ar_op;		/* ARP opcode (command)		*/
137 
138 #if 0
139 	 /*
140 	  *	 Ethernet looks like this : This bit is variable sized however...
141 	  */
142 	unsigned char		ar_sha[ETH_ALEN];	/* sender hardware address	*/
143 	unsigned char		ar_sip[4];		/* sender IP address		*/
144 	unsigned char		ar_tha[ETH_ALEN];	/* target hardware address	*/
145 	unsigned char		ar_tip[4];		/* target IP address		*/
146 #endif
147 
148 };
149 
150 #endif	/* _LINUX_IF_ARP_H */
151