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, <bir7@leland.Stanford.Edu> 13 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 14 * Florian La Roche. 15 * 16 * This program is free software; you can redistribute it and/or 17 * modify it under the terms of the GNU General Public License 18 * as published by the Free Software Foundation; either version 19 * 2 of the License, or (at your option) any later version. 20 */ 21 #ifndef _LINUX_IF_ARP_H 22 #define _LINUX_IF_ARP_H 23 24 /* ARP protocol HARDWARE identifiers. */ 25 #define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */ 26 #define ARPHRD_ETHER 1 /* Ethernet 10Mbps */ 27 #define ARPHRD_EETHER 2 /* Experimental Ethernet */ 28 #define ARPHRD_AX25 3 /* AX.25 Level 2 */ 29 #define ARPHRD_PRONET 4 /* PROnet token ring */ 30 #define ARPHRD_CHAOS 5 /* Chaosnet */ 31 #define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet- huh? */ 32 #define ARPHRD_ARCNET 7 /* ARCnet */ 33 #define ARPHRD_APPLETLK 8 /* APPLEtalk */ 34 /* Dummy types for non ARP hardware */ 35 #define ARPHRD_SLIP 256 36 #define ARPHRD_CSLIP 257 37 #define ARPHRD_SLIP6 258 38 #define ARPHRD_CSLIP6 259 39 #define ARPHRD_RSRVD 260 /* Notional KISS type */ 40 #define ARPHRD_ADAPT 264 41 #define ARPHRD_PPP 512 42 43 /* ARP protocol opcodes. */ 44 #define ARPOP_REQUEST 1 /* ARP request */ 45 #define ARPOP_REPLY 2 /* ARP reply */ 46 #define ARPOP_RREQUEST 3 /* RARP request */ 47 #define ARPOP_RREPLY 4 /* RARP reply */ 48 49 50 /* ARP ioctl request. */ 51 struct arpreq { 52 struct sockaddr arp_pa; /* protocol address */ 53 struct sockaddr arp_ha; /* hardware address */ 54 int arp_flags; /* flags */ 55 struct sockaddr arp_netmask; /* netmask (only for proxy arps) */ 56 }; 57 58 /* ARP Flag values. */ 59 #define ATF_COM 0x02 /* completed entry (ha valid) */ 60 #define ATF_PERM 0x04 /* permanent entry */ 61 #define ATF_PUBL 0x08 /* publish entry */ 62 #define ATF_USETRAILERS 0x10 /* has requested trailers */ 63 #define ATF_NETMASK 0x20 /* want to use a netmask (only 64 for proxy entries) */ 65 66 /* 67 * This structure defines an ethernet arp header. 68 */ 69 70 struct arphdr 71 { 72 unsigned short ar_hrd; /* format of hardware address */ 73 unsigned short ar_pro; /* format of protocol address */ 74 unsigned char ar_hln; /* length of hardware address */ 75 unsigned char ar_pln; /* length of protocol address */ 76 unsigned short ar_op; /* ARP opcode (command) */ 77 78 #if 0 79 /* 80 * Ethernet looks like this : This bit is variable sized however... 81 */ 82 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ 83 unsigned char ar_sip[4]; /* sender IP address */ 84 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ 85 unsigned char ar_tip[4]; /* target IP address */ 86 #endif 87 88 }; 89 90 #endif /* _LINUX_IF_ARP_H */