linux-headers (unknown)
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 _LINUX_IF_ARP_H
25 #define _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 /* _LINUX_IF_ARP_H */
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