1 /* Definitions for Address Resolution Protocol.
2 Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Based on the 4.4BSD and Linux version of this file. */
25 #define _NET_IF_ARP_H 1
26 #include <sys/cdefs.h>
28 #include <sys/types.h>
29 #include <sys/socket.h>
33 /* Some internals from deep down in the kernel. */
34 #define MAX_ADDR_LEN 7
37 /* This structure defines an ethernet arp header. */
39 /* ARP protocol opcodes. */
40 #define ARPOP_REQUEST 1 /* ARP request. */
41 #define ARPOP_REPLY 2 /* ARP reply. */
42 #define ARPOP_RREQUEST 3 /* RARP request. */
43 #define ARPOP_RREPLY 4 /* RARP reply. */
44 #define ARPOP_InREQUEST 8 /* InARP request. */
45 #define ARPOP_InREPLY 9 /* InARP reply. */
46 #define ARPOP_NAK 10 /* (ATM)ARP NAK. */
48 /* See RFC 826 for protocol description. ARP packets are variable
49 in size; the arphdr structure defines the fixed-length portion.
50 Protocol type values are the same as those for 10 Mb/s Ethernet.
51 It is followed by the variable-sized fields ar_sha, arp_spa,
52 arp_tha and arp_tpa in that order, according to the lengths
53 specified. Field names used correspond to RFC 826. */
57 unsigned short int ar_hrd
; /* Format of hardware address. */
58 unsigned short int ar_pro
; /* Format of protocol address. */
59 unsigned char ar_hln
; /* Length of hardware address. */
60 unsigned char ar_pln
; /* Length of protocol address. */
61 unsigned short int ar_op
; /* ARP opcode (command). */
63 /* Ethernet looks like this : This bit is variable sized
65 unsigned char __ar_sha
[ETH_ALEN
]; /* Sender hardware address. */
66 unsigned char __ar_sip
[4]; /* Sender IP address. */
67 unsigned char __ar_tha
[ETH_ALEN
]; /* Target hardware address. */
68 unsigned char __ar_tip
[4]; /* Target IP address. */
73 /* ARP protocol HARDWARE identifiers. */
74 #define ARPHRD_NETROM 0 /* From KA9Q: NET/ROM pseudo. */
75 #define ARPHRD_ETHER 1 /* Ethernet 10/100Mbps. */
76 #define ARPHRD_EETHER 2 /* Experimental Ethernet. */
77 #define ARPHRD_AX25 3 /* AX.25 Level 2. */
78 #define ARPHRD_PRONET 4 /* PROnet token ring. */
79 #define ARPHRD_CHAOS 5 /* Chaosnet. */
80 #define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB. */
81 #define ARPHRD_ARCNET 7 /* ARCnet. */
82 #define ARPHRD_APPLETLK 8 /* APPLEtalk. */
83 #define ARPHRD_DLCI 15 /* Frame Relay DLCI. */
84 #define ARPHRD_ATM 19 /* ATM. */
85 #define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id). */
87 /* Dummy types for non ARP hardware */
88 #define ARPHRD_SLIP 256
89 #define ARPHRD_CSLIP 257
90 #define ARPHRD_SLIP6 258
91 #define ARPHRD_CSLIP6 259
92 #define ARPHRD_RSRVD 260 /* Notional KISS type. */
93 #define ARPHRD_ADAPT 264
94 #define ARPHRD_ROSE 270
95 #define ARPHRD_X25 271 /* CCITT X.25. */
96 #define ARPHDR_HWX25 272 /* Boards with X.25 in firmware. */
97 #define ARPHRD_PPP 512
98 #define ARPHRD_CISCO 513 /* Cisco HDLC. */
99 #define ARPHRD_HDLC ARPHRD_CISCO
100 #define ARPHRD_LAPB 516 /* LAPB. */
101 #define ARPHRD_DDCMP 517 /* Digital's DDCMP. */
102 #define ARPHRD_RAWHDLC 518 /* Raw HDLC. */
104 #define ARPHRD_TUNNEL 768 /* IPIP tunnel. */
105 #define ARPHRD_TUNNEL6 769 /* IPIP6 tunnel. */
106 #define ARPHRD_FRAD 770 /* Frame Relay Access Device. */
107 #define ARPHRD_SKIP 771 /* SKIP vif. */
108 #define ARPHRD_LOOPBACK 772 /* Loopback device. */
109 #define ARPHRD_LOCALTLK 773 /* Localtalk device. */
110 #define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface. */
111 #define ARPHRD_BIF 775 /* AP1000 BIF. */
112 #define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4. */
113 #define ARPHRD_IPDDP 777 /* IP-in-DDP tunnel. */
114 #define ARPHRD_IPGRE 778 /* GRE over IP. */
115 #define ARPHRD_PIMREG 779 /* PIMSM register interface. */
116 #define ARPHRD_HIPPI 780 /* High Performance Parallel I'face. */
117 #define ARPHRD_ASH 781 /* (Nexus Electronics) Ash. */
118 #define ARPHRD_ECONET 782 /* Acorn Econet. */
119 #define ARPHRD_IRDA 783 /* Linux-IrDA. */
120 #define ARPHRD_FCPP 784 /* Point to point fibrechanel. */
121 #define ARPHRD_FCAL 785 /* Fibrechanel arbitrated loop. */
122 #define ARPHRD_FCPL 786 /* Fibrechanel public loop. */
123 #define ARPHRD_FCPFABRIC 787 /* Fibrechanel fabric. */
124 #define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR. */
125 #define ARPHRD_IEEE80211 801 /* IEEE 802.11. */
127 /* ARP ioctl request. */
130 struct sockaddr arp_pa
; /* Protocol address. */
131 struct sockaddr arp_ha
; /* Hardware address. */
132 int arp_flags
; /* Flags. */
133 struct sockaddr arp_netmask
; /* Netmask (only for proxy arps). */
139 struct sockaddr arp_pa
; /* Protocol address. */
140 struct sockaddr arp_ha
; /* Hardware address. */
141 int arp_flags
; /* Flags. */
142 struct sockaddr arp_netmask
; /* Netmask (only for proxy arps). */
145 /* ARP Flag values. */
146 #define ATF_COM 0x02 /* Completed entry (ha valid). */
147 #define ATF_PERM 0x04 /* Permanent entry. */
148 #define ATF_PUBL 0x08 /* Publish entry. */
149 #define ATF_USETRAILERS 0x10 /* Has requested trailers. */
150 #define ATF_NETMASK 0x20 /* Want to use a netmask (only
151 for proxy entries). */
152 #define ATF_DONTPUB 0x40 /* Don't answer this addresses. */
153 #define ATF_MAGIC 0x80 /* Automatically added entry. */
156 /* Support for the user space arp daemon, arpd. */
157 #define ARPD_UPDATE 0x01
158 #define ARPD_LOOKUP 0x02
159 #define ARPD_FLUSH 0x03
163 unsigned short int req
; /* Request type. */
164 u_int32_t ip
; /* IP address of entry. */
165 unsigned long int dev
; /* Device entry is tied to. */
166 unsigned long int stamp
;
167 unsigned long int updated
;
168 unsigned char ha
[MAX_ADDR_LEN
]; /* Hardware address. */
173 #endif /* net/if_arp.h */