| 1 | /* Definitions for Address Resolution Protocol. |
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| 2 | Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
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| 5 | |
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| 6 | The GNU C Library is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Lesser General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2.1 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | The GNU C Library is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Lesser General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Lesser General Public |
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| 17 | License along with the GNU C Library; if not, write to the Free |
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| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 19 | 02111-1307 USA. */ |
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| 20 | |
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| 21 | /* Based on the 4.4BSD and Linux version of this file. */ |
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| 22 | |
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| 23 | #ifndef _NET_IF_ARP_H |
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| 24 | |
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| 25 | #define _NET_IF_ARP_H 1 |
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| 26 | #include <sys/cdefs.h> |
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| 27 | |
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| 28 | #include <sys/types.h> |
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| 29 | #include <sys/socket.h> |
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| 30 | |
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| 31 | __BEGIN_DECLS |
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| 32 | |
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| 33 | /* Some internals from deep down in the kernel. */ |
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| 34 | #define MAX_ADDR_LEN 7 |
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| 35 | |
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| 36 | |
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| 37 | /* This structure defines an ethernet arp header. */ |
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| 38 | |
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| 39 | /* ARP protocol opcodes. */ |
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| 40 | #define ARPOP_REQUEST 1 /* ARP request. */ |
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| 41 | #define ARPOP_REPLY 2 /* ARP reply. */ |
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| 42 | #define ARPOP_RREQUEST 3 /* RARP request. */ |
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| 43 | #define ARPOP_RREPLY 4 /* RARP reply. */ |
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| 44 | #define ARPOP_InREQUEST 8 /* InARP request. */ |
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| 45 | #define ARPOP_InREPLY 9 /* InARP reply. */ |
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| 46 | #define ARPOP_NAK 10 /* (ATM)ARP NAK. */ |
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| 47 | |
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| 48 | /* See RFC 826 for protocol description. ARP packets are variable |
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| 49 | in size; the arphdr structure defines the fixed-length portion. |
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| 50 | Protocol type values are the same as those for 10 Mb/s Ethernet. |
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| 51 | It is followed by the variable-sized fields ar_sha, arp_spa, |
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| 52 | arp_tha and arp_tpa in that order, according to the lengths |
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| 53 | specified. Field names used correspond to RFC 826. */ |
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| 54 | |
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| 55 | struct arphdr |
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| 56 | { |
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| 57 | unsigned short int ar_hrd; /* Format of hardware address. */ |
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| 58 | unsigned short int ar_pro; /* Format of protocol address. */ |
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| 59 | unsigned char ar_hln; /* Length of hardware address. */ |
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| 60 | unsigned char ar_pln; /* Length of protocol address. */ |
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| 61 | unsigned short int ar_op; /* ARP opcode (command). */ |
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| 62 | #if 0 |
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| 63 | /* Ethernet looks like this : This bit is variable sized |
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| 64 | however... */ |
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| 65 | unsigned char __ar_sha[ETH_ALEN]; /* Sender hardware address. */ |
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| 66 | unsigned char __ar_sip[4]; /* Sender IP address. */ |
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| 67 | unsigned char __ar_tha[ETH_ALEN]; /* Target hardware address. */ |
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| 68 | unsigned char __ar_tip[4]; /* Target IP address. */ |
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| 69 | #endif |
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| 70 | }; |
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| 71 | |
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| 72 | |
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| 73 | /* ARP protocol HARDWARE identifiers. */ |
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| 74 | #define ARPHRD_NETROM 0 /* From KA9Q: NET/ROM pseudo. */ |
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| 75 | #define ARPHRD_ETHER 1 /* Ethernet 10/100Mbps. */ |
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| 76 | #define ARPHRD_EETHER 2 /* Experimental Ethernet. */ |
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| 77 | #define ARPHRD_AX25 3 /* AX.25 Level 2. */ |
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| 78 | #define ARPHRD_PRONET 4 /* PROnet token ring. */ |
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| 79 | #define ARPHRD_CHAOS 5 /* Chaosnet. */ |
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| 80 | #define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB. */ |
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| 81 | #define ARPHRD_ARCNET 7 /* ARCnet. */ |
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| 82 | #define ARPHRD_APPLETLK 8 /* APPLEtalk. */ |
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| 83 | #define ARPHRD_DLCI 15 /* Frame Relay DLCI. */ |
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| 84 | #define ARPHRD_ATM 19 /* ATM. */ |
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| 85 | #define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id). */ |
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| 86 | #define ARPHRD_IEEE1394 24 /* IEEE 1394 IPv4 - RFC 2734. */ |
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| 87 | #define ARPHRD_EUI64 27 /* EUI-64. */ |
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| 88 | #define ARPHRD_INFINIBAND 32 /* InfiniBand. */ |
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| 89 | |
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| 90 | /* Dummy types for non ARP hardware */ |
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| 91 | #define ARPHRD_SLIP 256 |
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| 92 | #define ARPHRD_CSLIP 257 |
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| 93 | #define ARPHRD_SLIP6 258 |
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| 94 | #define ARPHRD_CSLIP6 259 |
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| 95 | #define ARPHRD_RSRVD 260 /* Notional KISS type. */ |
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| 96 | #define ARPHRD_ADAPT 264 |
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| 97 | #define ARPHRD_ROSE 270 |
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| 98 | #define ARPHRD_X25 271 /* CCITT X.25. */ |
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| 99 | #define ARPHDR_HWX25 272 /* Boards with X.25 in firmware. */ |
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| 100 | #define ARPHRD_PPP 512 |
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| 101 | #define ARPHRD_CISCO 513 /* Cisco HDLC. */ |
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| 102 | #define ARPHRD_HDLC ARPHRD_CISCO |
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| 103 | #define ARPHRD_LAPB 516 /* LAPB. */ |
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| 104 | #define ARPHRD_DDCMP 517 /* Digital's DDCMP. */ |
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| 105 | #define ARPHRD_RAWHDLC 518 /* Raw HDLC. */ |
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| 106 | |
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| 107 | #define ARPHRD_TUNNEL 768 /* IPIP tunnel. */ |
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| 108 | #define ARPHRD_TUNNEL6 769 /* IPIP6 tunnel. */ |
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| 109 | #define ARPHRD_FRAD 770 /* Frame Relay Access Device. */ |
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| 110 | #define ARPHRD_SKIP 771 /* SKIP vif. */ |
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| 111 | #define ARPHRD_LOOPBACK 772 /* Loopback device. */ |
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| 112 | #define ARPHRD_LOCALTLK 773 /* Localtalk device. */ |
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| 113 | #define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface. */ |
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| 114 | #define ARPHRD_BIF 775 /* AP1000 BIF. */ |
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| 115 | #define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4. */ |
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| 116 | #define ARPHRD_IPDDP 777 /* IP-in-DDP tunnel. */ |
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| 117 | #define ARPHRD_IPGRE 778 /* GRE over IP. */ |
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| 118 | #define ARPHRD_PIMREG 779 /* PIMSM register interface. */ |
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| 119 | #define ARPHRD_HIPPI 780 /* High Performance Parallel I'face. */ |
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| 120 | #define ARPHRD_ASH 781 /* (Nexus Electronics) Ash. */ |
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| 121 | #define ARPHRD_ECONET 782 /* Acorn Econet. */ |
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| 122 | #define ARPHRD_IRDA 783 /* Linux-IrDA. */ |
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| 123 | #define ARPHRD_FCPP 784 /* Point to point fibrechanel. */ |
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| 124 | #define ARPHRD_FCAL 785 /* Fibrechanel arbitrated loop. */ |
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| 125 | #define ARPHRD_FCPL 786 /* Fibrechanel public loop. */ |
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| 126 | #define ARPHRD_FCFABRIC 787 /* Fibrechanel fabric. */ |
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| 127 | #define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR. */ |
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| 128 | #define ARPHRD_IEEE80211 801 /* IEEE 802.11. */ |
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| 129 | |
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| 130 | /* ARP ioctl request. */ |
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| 131 | struct arpreq |
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| 132 | { |
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| 133 | struct sockaddr arp_pa; /* Protocol address. */ |
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| 134 | struct sockaddr arp_ha; /* Hardware address. */ |
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| 135 | int arp_flags; /* Flags. */ |
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| 136 | struct sockaddr arp_netmask; /* Netmask (only for proxy arps). */ |
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| 137 | char arp_dev[16]; |
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| 138 | }; |
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| 139 | |
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| 140 | struct arpreq_old |
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| 141 | { |
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| 142 | struct sockaddr arp_pa; /* Protocol address. */ |
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| 143 | struct sockaddr arp_ha; /* Hardware address. */ |
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| 144 | int arp_flags; /* Flags. */ |
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| 145 | struct sockaddr arp_netmask; /* Netmask (only for proxy arps). */ |
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| 146 | }; |
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| 147 | |
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| 148 | /* ARP Flag values. */ |
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| 149 | #define ATF_COM 0x02 /* Completed entry (ha valid). */ |
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| 150 | #define ATF_PERM 0x04 /* Permanent entry. */ |
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| 151 | #define ATF_PUBL 0x08 /* Publish entry. */ |
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| 152 | #define ATF_USETRAILERS 0x10 /* Has requested trailers. */ |
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| 153 | #define ATF_NETMASK 0x20 /* Want to use a netmask (only |
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| 154 | for proxy entries). */ |
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| 155 | #define ATF_DONTPUB 0x40 /* Don't answer this addresses. */ |
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| 156 | #define ATF_MAGIC 0x80 /* Automatically added entry. */ |
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| 157 | |
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| 158 | |
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| 159 | /* Support for the user space arp daemon, arpd. */ |
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| 160 | #define ARPD_UPDATE 0x01 |
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| 161 | #define ARPD_LOOKUP 0x02 |
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| 162 | #define ARPD_FLUSH 0x03 |
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| 163 | |
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| 164 | struct arpd_request |
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| 165 | { |
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| 166 | unsigned short int req; /* Request type. */ |
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| 167 | u_int32_t ip; /* IP address of entry. */ |
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| 168 | unsigned long int dev; /* Device entry is tied to. */ |
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| 169 | unsigned long int stamp; |
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| 170 | unsigned long int updated; |
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| 171 | unsigned char ha[MAX_ADDR_LEN]; /* Hardware address. */ |
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| 172 | }; |
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| 173 | |
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| 174 | __END_DECLS |
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| 175 | |
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| 176 | #endif /* net/if_arp.h */ |
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