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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 |
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_CAN 280 /* Controller Area Network */ |
56 | #define ARPHRD_PPP 512 |
57 | #define ARPHRD_CISCO 513 /* Cisco HDLC */ |
58 | #define ARPHRD_HDLC ARPHRD_CISCO |
59 | #define ARPHRD_LAPB 516 /* LAPB */ |
60 | #define ARPHRD_DDCMP 517 /* Digital's DDCMP protocol */ |
61 | #define ARPHRD_RAWHDLC 518 /* Raw HDLC */ |
62 | |
63 | #define ARPHRD_TUNNEL 768 /* IPIP tunnel */ |
64 | #define ARPHRD_TUNNEL6 769 /* IP6IP6 tunnel */ |
65 | #define ARPHRD_FRAD 770 /* Frame Relay Access Device */ |
66 | #define ARPHRD_SKIP 771 /* SKIP vif */ |
67 | #define ARPHRD_LOOPBACK 772 /* Loopback device */ |
68 | #define ARPHRD_LOCALTLK 773 /* Localtalk device */ |
69 | #define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface */ |
70 | #define ARPHRD_BIF 775 /* AP1000 BIF */ |
71 | #define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4 */ |
72 | #define ARPHRD_IPDDP 777 /* IP over DDP tunneller */ |
73 | #define ARPHRD_IPGRE 778 /* GRE over IP */ |
74 | #define ARPHRD_PIMREG 779 /* PIMSM register interface */ |
75 | #define ARPHRD_HIPPI 780 /* High Performance Parallel Interface */ |
76 | #define ARPHRD_ASH 781 /* Nexus 64Mbps Ash */ |
77 | #define ARPHRD_ECONET 782 /* Acorn Econet */ |
78 | #define ARPHRD_IRDA 783 /* Linux-IrDA */ |
79 | /* ARP works differently on different FC media .. so */ |
80 | #define ARPHRD_FCPP 784 /* Point to point fibrechannel */ |
81 | #define ARPHRD_FCAL 785 /* Fibrechannel arbitrated loop */ |
82 | #define ARPHRD_FCPL 786 /* Fibrechannel public loop */ |
83 | #define ARPHRD_FCFABRIC 787 /* Fibrechannel fabric */ |
84 | /* 787->799 reserved for fibrechannel media types */ |
85 | #define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR */ |
86 | #define ARPHRD_IEEE80211 801 /* IEEE 802.11 */ |
87 | #define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header */ |
88 | #define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header */ |
89 | #define ARPHRD_IEEE802154 804 |
90 | |
91 | #define ARPHRD_PHONET 820 /* PhoNet media type */ |
92 | #define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */ |
93 | #define ARPHRD_CAIF 822 /* CAIF media type */ |
94 | |
95 | #define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */ |
96 | #define ARPHRD_NONE 0xFFFE /* zero header length */ |
97 | |
98 | /* ARP protocol opcodes. */ |
99 | #define ARPOP_REQUEST 1 /* ARP request */ |
100 | #define ARPOP_REPLY 2 /* ARP reply */ |
101 | #define ARPOP_RREQUEST 3 /* RARP request */ |
102 | #define ARPOP_RREPLY 4 /* RARP reply */ |
103 | #define ARPOP_InREQUEST 8 /* InARP request */ |
104 | #define ARPOP_InREPLY 9 /* InARP reply */ |
105 | #define ARPOP_NAK 10 /* (ATM)ARP NAK */ |
106 | |
107 | |
108 | /* ARP ioctl request. */ |
109 | struct arpreq { |
110 | struct sockaddr arp_pa; /* protocol address */ |
111 | struct sockaddr arp_ha; /* hardware address */ |
112 | int arp_flags; /* flags */ |
113 | struct sockaddr arp_netmask; /* netmask (only for proxy arps) */ |
114 | char arp_dev[16]; |
115 | }; |
116 | |
117 | struct arpreq_old { |
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 | }; |
123 | |
124 | /* ARP Flag values. */ |
125 | #define ATF_COM 0x02 /* completed entry (ha valid) */ |
126 | #define ATF_PERM 0x04 /* permanent entry */ |
127 | #define ATF_PUBL 0x08 /* publish entry */ |
128 | #define ATF_USETRAILERS 0x10 /* has requested trailers */ |
129 | #define ATF_NETMASK 0x20 /* want to use a netmask (only |
130 | for proxy entries) */ |
131 | #define ATF_DONTPUB 0x40 /* don't answer this addresses */ |
132 | |
133 | /* |
134 | * This structure defines an ethernet arp header. |
135 | */ |
136 | |
137 | struct arphdr { |
138 | __be16 ar_hrd; /* format of hardware address */ |
139 | __be16 ar_pro; /* format of protocol address */ |
140 | unsigned char ar_hln; /* length of hardware address */ |
141 | unsigned char ar_pln; /* length of protocol address */ |
142 | __be16 ar_op; /* ARP opcode (command) */ |
143 | |
144 | #if 0 |
145 | /* |
146 | * Ethernet looks like this : This bit is variable sized however... |
147 | */ |
148 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ |
149 | unsigned char ar_sip[4]; /* sender IP address */ |
150 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ |
151 | unsigned char ar_tip[4]; /* target IP address */ |
152 | #endif |
153 | |
154 | }; |
155 | |
156 | #ifdef __KERNEL__ |
157 | #include <linux/skbuff.h> |
158 | |
159 | static inline struct arphdr *arp_hdr(const struct sk_buff *skb) |
160 | { |
161 | return (struct arphdr *)skb_network_header(skb); |
162 | } |
163 | |
164 | static inline int arp_hdr_len(struct net_device *dev) |
165 | { |
166 | /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ |
167 | return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2; |
168 | } |
169 | #endif |
170 | |
171 | #endif /* _LINUX_IF_ARP_H */ |
172 |
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