1 | /* Definitions for Address Resolution Protocol. |
2 | Copyright (C) 1997-2018 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
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 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ |
19 | |
20 | /* Based on the 4.4BSD and Linux version of this file. */ |
21 | |
22 | #ifndef _NET_IF_ARP_H |
23 | #define _NET_IF_ARP_H 1 |
24 | |
25 | #include <sys/types.h> |
26 | #include <sys/socket.h> |
27 | #include <stdint.h> |
28 | |
29 | __BEGIN_DECLS |
30 | |
31 | /* Some internals from deep down in the kernel. */ |
32 | #define MAX_ADDR_LEN 7 |
33 | |
34 | |
35 | /* This structure defines an ethernet arp header. */ |
36 | |
37 | /* ARP protocol opcodes. */ |
38 | #define ARPOP_REQUEST 1 /* ARP request. */ |
39 | #define ARPOP_REPLY 2 /* ARP reply. */ |
40 | #define ARPOP_RREQUEST 3 /* RARP request. */ |
41 | #define ARPOP_RREPLY 4 /* RARP reply. */ |
42 | #define ARPOP_InREQUEST 8 /* InARP request. */ |
43 | #define ARPOP_InREPLY 9 /* InARP reply. */ |
44 | #define ARPOP_NAK 10 /* (ATM)ARP NAK. */ |
45 | |
46 | /* See RFC 826 for protocol description. ARP packets are variable |
47 | in size; the arphdr structure defines the fixed-length portion. |
48 | Protocol type values are the same as those for 10 Mb/s Ethernet. |
49 | It is followed by the variable-sized fields ar_sha, arp_spa, |
50 | arp_tha and arp_tpa in that order, according to the lengths |
51 | specified. Field names used correspond to RFC 826. */ |
52 | |
53 | struct arphdr |
54 | { |
55 | unsigned short int ar_hrd; /* Format of hardware address. */ |
56 | unsigned short int ar_pro; /* Format of protocol address. */ |
57 | unsigned char ar_hln; /* Length of hardware address. */ |
58 | unsigned char ar_pln; /* Length of protocol address. */ |
59 | unsigned short int ar_op; /* ARP opcode (command). */ |
60 | #if 0 |
61 | /* Ethernet looks like this : This bit is variable sized |
62 | however... */ |
63 | unsigned char __ar_sha[ETH_ALEN]; /* Sender hardware address. */ |
64 | unsigned char __ar_sip[4]; /* Sender IP address. */ |
65 | unsigned char __ar_tha[ETH_ALEN]; /* Target hardware address. */ |
66 | unsigned char __ar_tip[4]; /* Target IP address. */ |
67 | #endif |
68 | }; |
69 | |
70 | |
71 | /* ARP protocol HARDWARE identifiers. */ |
72 | #define ARPHRD_NETROM 0 /* From KA9Q: NET/ROM pseudo. */ |
73 | #define ARPHRD_ETHER 1 /* Ethernet 10/100Mbps. */ |
74 | #define ARPHRD_EETHER 2 /* Experimental Ethernet. */ |
75 | #define ARPHRD_AX25 3 /* AX.25 Level 2. */ |
76 | #define ARPHRD_PRONET 4 /* PROnet token ring. */ |
77 | #define ARPHRD_CHAOS 5 /* Chaosnet. */ |
78 | #define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB. */ |
79 | #define ARPHRD_ARCNET 7 /* ARCnet. */ |
80 | #define ARPHRD_APPLETLK 8 /* APPLEtalk. */ |
81 | #define ARPHRD_DLCI 15 /* Frame Relay DLCI. */ |
82 | #define ARPHRD_ATM 19 /* ATM. */ |
83 | #define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id). */ |
84 | #define ARPHRD_IEEE1394 24 /* IEEE 1394 IPv4 - RFC 2734. */ |
85 | #define ARPHRD_EUI64 27 /* EUI-64. */ |
86 | #define ARPHRD_INFINIBAND 32 /* InfiniBand. */ |
87 | |
88 | /* Dummy types for non ARP hardware */ |
89 | #define ARPHRD_SLIP 256 |
90 | #define ARPHRD_CSLIP 257 |
91 | #define ARPHRD_SLIP6 258 |
92 | #define ARPHRD_CSLIP6 259 |
93 | #define ARPHRD_RSRVD 260 /* Notional KISS type. */ |
94 | #define ARPHRD_ADAPT 264 |
95 | #define ARPHRD_ROSE 270 |
96 | #define ARPHRD_X25 271 /* CCITT X.25. */ |
97 | #define ARPHRD_HWX25 272 /* Boards with X.25 in firmware. */ |
98 | #define ARPHRD_PPP 512 |
99 | #define ARPHRD_CISCO 513 /* Cisco HDLC. */ |
100 | #define ARPHRD_HDLC ARPHRD_CISCO |
101 | #define ARPHRD_LAPB 516 /* LAPB. */ |
102 | #define ARPHRD_DDCMP 517 /* Digital's DDCMP. */ |
103 | #define ARPHRD_RAWHDLC 518 /* Raw HDLC. */ |
104 | #define ARPHRD_RAWIP 519 /* Raw IP. */ |
105 | |
106 | #define ARPHRD_TUNNEL 768 /* IPIP tunnel. */ |
107 | #define ARPHRD_TUNNEL6 769 /* IPIP6 tunnel. */ |
108 | #define ARPHRD_FRAD 770 /* Frame Relay Access Device. */ |
109 | #define ARPHRD_SKIP 771 /* SKIP vif. */ |
110 | #define ARPHRD_LOOPBACK 772 /* Loopback device. */ |
111 | #define ARPHRD_LOCALTLK 773 /* Localtalk device. */ |
112 | #define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface. */ |
113 | #define ARPHRD_BIF 775 /* AP1000 BIF. */ |
114 | #define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4. */ |
115 | #define ARPHRD_IPDDP 777 /* IP-in-DDP tunnel. */ |
116 | #define ARPHRD_IPGRE 778 /* GRE over IP. */ |
117 | #define ARPHRD_PIMREG 779 /* PIMSM register interface. */ |
118 | #define ARPHRD_HIPPI 780 /* High Performance Parallel I'face. */ |
119 | #define ARPHRD_ASH 781 /* (Nexus Electronics) Ash. */ |
120 | #define ARPHRD_ECONET 782 /* Acorn Econet. */ |
121 | #define ARPHRD_IRDA 783 /* Linux-IrDA. */ |
122 | #define ARPHRD_FCPP 784 /* Point to point fibrechanel. */ |
123 | #define ARPHRD_FCAL 785 /* Fibrechanel arbitrated loop. */ |
124 | #define ARPHRD_FCPL 786 /* Fibrechanel public loop. */ |
125 | #define ARPHRD_FCFABRIC 787 /* Fibrechanel fabric. */ |
126 | #define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR. */ |
127 | #define ARPHRD_IEEE80211 801 /* IEEE 802.11. */ |
128 | #define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header. */ |
129 | #define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header. */ |
130 | #define ARPHRD_IEEE802154 804 /* IEEE 802.15.4 header. */ |
131 | #define ARPHRD_IEEE802154_PHY 805 /* IEEE 802.15.4 PHY header. */ |
132 | |
133 | #define ARPHRD_VOID 0xFFFF /* Void type, nothing is known. */ |
134 | #define ARPHRD_NONE 0xFFFE /* Zero header length. */ |
135 | |
136 | |
137 | /* ARP ioctl request. */ |
138 | struct arpreq |
139 | { |
140 | struct sockaddr arp_pa; /* Protocol address. */ |
141 | struct sockaddr arp_ha; /* Hardware address. */ |
142 | int arp_flags; /* Flags. */ |
143 | struct sockaddr arp_netmask; /* Netmask (only for proxy arps). */ |
144 | char arp_dev[16]; |
145 | }; |
146 | |
147 | struct arpreq_old |
148 | { |
149 | struct sockaddr arp_pa; /* Protocol address. */ |
150 | struct sockaddr arp_ha; /* Hardware address. */ |
151 | int arp_flags; /* Flags. */ |
152 | struct sockaddr arp_netmask; /* Netmask (only for proxy arps). */ |
153 | }; |
154 | |
155 | /* ARP Flag values. */ |
156 | #define ATF_COM 0x02 /* Completed entry (ha valid). */ |
157 | #define ATF_PERM 0x04 /* Permanent entry. */ |
158 | #define ATF_PUBL 0x08 /* Publish entry. */ |
159 | #define ATF_USETRAILERS 0x10 /* Has requested trailers. */ |
160 | #define ATF_NETMASK 0x20 /* Want to use a netmask (only |
161 | for proxy entries). */ |
162 | #define ATF_DONTPUB 0x40 /* Don't answer this addresses. */ |
163 | #define ATF_MAGIC 0x80 /* Automatically added entry. */ |
164 | |
165 | |
166 | /* Support for the user space arp daemon, arpd. */ |
167 | #define ARPD_UPDATE 0x01 |
168 | #define ARPD_LOOKUP 0x02 |
169 | #define ARPD_FLUSH 0x03 |
170 | |
171 | struct arpd_request |
172 | { |
173 | unsigned short int req; /* Request type. */ |
174 | uint32_t ip; /* IP address of entry. */ |
175 | unsigned long int dev; /* Device entry is tied to. */ |
176 | unsigned long int stamp; |
177 | unsigned long int updated; |
178 | unsigned char ha[MAX_ADDR_LEN]; /* Hardware address. */ |
179 | }; |
180 | |
181 | __END_DECLS |
182 | |
183 | #endif /* net/if_arp.h */ |
184 | |