1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3  * INET		An implementation of the TCP/IP protocol suite for the LINUX
4  *		operating system.  INET is implemented using the  BSD Socket
5  *		interface as the means of communication with the user level.
6  *
7  *		Global definitions for the ARP (RFC 826) protocol.
8  *
9  * Version:	@(#)if_arp.h	1.0.1	04/16/93
10  *
11  * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
12  *		Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
13  *		Ross Biro
14  *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
15  *		Florian La Roche,
16  *		Jonathan Layes <layes@loran.com>
17  *		Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
18  *
19  *		This program is free software; you can redistribute it and/or
20  *		modify it under the terms of the GNU General Public License
21  *		as published by the Free Software Foundation; either version
22  *		2 of the License, or (at your option) any later version.
23  */
24 #ifndef _UAPI_LINUX_IF_ARP_H
25 #define _UAPI_LINUX_IF_ARP_H
26 
27 #include <linux/netdevice.h>
28 
29 /* ARP protocol HARDWARE identifiers. */
30 #define ARPHRD_NETROM	0		/* from KA9Q: NET/ROM pseudo	*/
31 #define ARPHRD_ETHER 	1		/* Ethernet 10Mbps		*/
32 #define	ARPHRD_EETHER	2		/* Experimental Ethernet	*/
33 #define	ARPHRD_AX25	3		/* AX.25 Level 2		*/
34 #define	ARPHRD_PRONET	4		/* PROnet token ring		*/
35 #define	ARPHRD_CHAOS	5		/* Chaosnet			*/
36 #define	ARPHRD_IEEE802	6		/* IEEE 802.2 Ethernet/TR/TB	*/
37 #define	ARPHRD_ARCNET	7		/* ARCnet			*/
38 #define	ARPHRD_APPLETLK	8		/* APPLEtalk			*/
39 #define ARPHRD_DLCI	15		/* Frame Relay DLCI		*/
40 #define ARPHRD_ATM	19		/* ATM 				*/
41 #define ARPHRD_METRICOM	23		/* Metricom STRIP (new IANA id)	*/
42 #define	ARPHRD_IEEE1394	24		/* IEEE 1394 IPv4 - RFC 2734	*/
43 #define ARPHRD_EUI64	27		/* EUI-64                       */
44 #define ARPHRD_INFINIBAND 32		/* InfiniBand			*/
45 
46 /* Dummy types for non ARP hardware */
47 #define ARPHRD_SLIP	256
48 #define ARPHRD_CSLIP	257
49 #define ARPHRD_SLIP6	258
50 #define ARPHRD_CSLIP6	259
51 #define ARPHRD_RSRVD	260		/* Notional KISS type 		*/
52 #define ARPHRD_ADAPT	264
53 #define ARPHRD_ROSE	270
54 #define ARPHRD_X25	271		/* CCITT X.25			*/
55 #define ARPHRD_HWX25	272		/* Boards with X.25 in firmware	*/
56 #define ARPHRD_CAN	280		/* Controller Area Network      */
57 #define ARPHRD_MCTP	290
58 #define ARPHRD_PPP	512
59 #define ARPHRD_CISCO	513		/* Cisco HDLC	 		*/
60 #define ARPHRD_HDLC	ARPHRD_CISCO
61 #define ARPHRD_LAPB	516		/* LAPB				*/
62 #define ARPHRD_DDCMP    517		/* Digital's DDCMP protocol     */
63 #define ARPHRD_RAWHDLC	518		/* Raw HDLC			*/
64 #define ARPHRD_RAWIP    519		/* Raw IP                       */
65 
66 #define ARPHRD_TUNNEL	768		/* IPIP tunnel			*/
67 #define ARPHRD_TUNNEL6	769		/* IP6IP6 tunnel       		*/
68 #define ARPHRD_FRAD	770             /* Frame Relay Access Device    */
69 #define ARPHRD_SKIP	771		/* SKIP vif			*/
70 #define ARPHRD_LOOPBACK	772		/* Loopback device		*/
71 #define ARPHRD_LOCALTLK 773		/* Localtalk device		*/
72 #define ARPHRD_FDDI	774		/* Fiber Distributed Data Interface */
73 #define ARPHRD_BIF      775             /* AP1000 BIF                   */
74 #define ARPHRD_SIT	776		/* sit0 device - IPv6-in-IPv4	*/
75 #define ARPHRD_IPDDP	777		/* IP over DDP tunneller	*/
76 #define ARPHRD_IPGRE	778		/* GRE over IP			*/
77 #define ARPHRD_PIMREG	779		/* PIMSM register interface	*/
78 #define ARPHRD_HIPPI	780		/* High Performance Parallel Interface */
79 #define ARPHRD_ASH	781		/* Nexus 64Mbps Ash		*/
80 #define ARPHRD_ECONET	782		/* Acorn Econet			*/
81 #define ARPHRD_IRDA 	783		/* Linux-IrDA			*/
82 /* ARP works differently on different FC media .. so  */
83 #define ARPHRD_FCPP	784		/* Point to point fibrechannel	*/
84 #define ARPHRD_FCAL	785		/* Fibrechannel arbitrated loop */
85 #define ARPHRD_FCPL	786		/* Fibrechannel public loop	*/
86 #define ARPHRD_FCFABRIC	787		/* Fibrechannel fabric		*/
87 	/* 787->799 reserved for fibrechannel media types */
88 #define ARPHRD_IEEE802_TR 800		/* Magic type ident for TR	*/
89 #define ARPHRD_IEEE80211 801		/* IEEE 802.11			*/
90 #define ARPHRD_IEEE80211_PRISM 802	/* IEEE 802.11 + Prism2 header  */
91 #define ARPHRD_IEEE80211_RADIOTAP 803	/* IEEE 802.11 + radiotap header */
92 #define ARPHRD_IEEE802154	  804
93 #define ARPHRD_IEEE802154_MONITOR 805	/* IEEE 802.15.4 network monitor */
94 
95 #define ARPHRD_PHONET	820		/* PhoNet media type		*/
96 #define ARPHRD_PHONET_PIPE 821		/* PhoNet pipe header		*/
97 #define ARPHRD_CAIF	822		/* CAIF media type		*/
98 #define ARPHRD_IP6GRE	823		/* GRE over IPv6		*/
99 #define ARPHRD_NETLINK	824		/* Netlink header		*/
100 #define ARPHRD_6LOWPAN	825		/* IPv6 over LoWPAN             */
101 #define ARPHRD_VSOCKMON	826		/* Vsock monitor header		*/
102 
103 #define ARPHRD_VOID	  0xFFFF	/* Void type, nothing is known */
104 #define ARPHRD_NONE	  0xFFFE	/* zero header length */
105 
106 /* ARP protocol opcodes. */
107 #define	ARPOP_REQUEST	1		/* ARP request			*/
108 #define	ARPOP_REPLY	2		/* ARP reply			*/
109 #define	ARPOP_RREQUEST	3		/* RARP request			*/
110 #define	ARPOP_RREPLY	4		/* RARP reply			*/
111 #define	ARPOP_InREQUEST	8		/* InARP request		*/
112 #define	ARPOP_InREPLY	9		/* InARP reply			*/
113 #define	ARPOP_NAK	10		/* (ATM)ARP NAK			*/
114 
115 
116 /* ARP ioctl request. */
117 struct arpreq {
118 	struct sockaddr	arp_pa;		/* protocol address		 */
119 	struct sockaddr	arp_ha;		/* hardware address		 */
120 	int		arp_flags;	/* flags			 */
121 	struct sockaddr arp_netmask;    /* netmask (only for proxy arps) */
122 	char		arp_dev[IFNAMSIZ];
123 };
124 
125 struct arpreq_old {
126 	struct sockaddr	arp_pa;		/* protocol address		 */
127 	struct sockaddr	arp_ha;		/* hardware address		 */
128 	int		arp_flags;	/* flags			 */
129 	struct sockaddr	arp_netmask;    /* netmask (only for proxy arps) */
130 };
131 
132 /* ARP Flag values. */
133 #define ATF_COM		0x02		/* completed entry (ha valid)	*/
134 #define	ATF_PERM	0x04		/* permanent entry		*/
135 #define	ATF_PUBL	0x08		/* publish entry		*/
136 #define	ATF_USETRAILERS	0x10		/* has requested trailers	*/
137 #define ATF_NETMASK     0x20            /* want to use a netmask (only
138 					   for proxy entries) */
139 #define ATF_DONTPUB	0x40		/* don't answer this addresses	*/
140 
141 /*
142  *	This structure defines an ethernet arp header.
143  */
144 
145 struct arphdr {
146 	__be16		ar_hrd;		/* format of hardware address	*/
147 	__be16		ar_pro;		/* format of protocol address	*/
148 	unsigned char	ar_hln;		/* length of hardware address	*/
149 	unsigned char	ar_pln;		/* length of protocol address	*/
150 	__be16		ar_op;		/* ARP opcode (command)		*/
151 
152 #if 0
153 	 /*
154 	  *	 Ethernet looks like this : This bit is variable sized however...
155 	  */
156 	unsigned char		ar_sha[ETH_ALEN];	/* sender hardware address	*/
157 	unsigned char		ar_sip[4];		/* sender IP address		*/
158 	unsigned char		ar_tha[ETH_ALEN];	/* target hardware address	*/
159 	unsigned char		ar_tip[4];		/* target IP address		*/
160 #endif
161 
162 };
163 
164 
165 #endif /* _UAPI_LINUX_IF_ARP_H */
166