| /* |
| * INET An implementation of the TCP/IP protocol suite for the LINUX |
| * operating system. INET is implemented using the BSD Socket |
| * interface as the means of communication with the user level. |
| * |
| * Global definitions for the ARP (RFC 826) protocol. |
| * |
| * Version: @(#)if_arp.h 1.0.1 04/16/93 |
| * |
| * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988 |
| * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source. |
| * Ross Biro, <bir7@leland.Stanford.Edu> |
| * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #ifndef _LINUX_IF_ARP_H |
| #define _LINUX_IF_ARP_H |
| |
| /* ARP protocol HARDWARE identifiers. */ |
| #define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */ |
| #define ARPHRD_ETHER 1 /* Ethernet 10Mbps */ |
| #define ARPHRD_EETHER 2 /* Experimental Ethernet */ |
| #define ARPHRD_AX25 3 /* AX.25 Level 2 */ |
| #define ARPHRD_PRONET 4 /* PROnet token ring */ |
| #define ARPHRD_CHAOS 5 /* Chaosnet */ |
| #define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet- huh? */ |
| #define ARPHRD_ARCNET 7 /* ARCnet */ |
| #define ARPHRD_APPLETLK 8 /* APPLEtalk */ |
| |
| /* ARP protocol opcodes. */ |
| #define ARPOP_REQUEST 1 /* ARP request */ |
| #define ARPOP_REPLY 2 /* ARP reply */ |
| #define ARPOP_RREQUEST 3 /* RARP request */ |
| #define ARPOP_RREPLY 4 /* RARP reply */ |
| |
| |
| /* |
| * Address Resolution Protocol. |
| * |
| * See RFC 826 for protocol description. ARP packets are variable |
| * in size; the arphdr structure defines the fixed-length portion. |
| * Protocol type values are the same as those for 10 Mb/s Ethernet. |
| * It is followed by the variable-sized fields ar_sha, arp_spa, |
| * arp_tha and arp_tpa in that order, according to the lengths |
| * specified. Field names used correspond to RFC 826. |
| */ |
| struct arphdr { |
| unsigned short ar_hrd; /* format of hardware address */ |
| unsigned short ar_pro; /* format of protocol address */ |
| unsigned char ar_hln; /* length of hardware address */ |
| unsigned char ar_pln; /* length of protocol address */ |
| unsigned short ar_op; /* ARP opcode (command) */ |
| |
| /* The rest is variable in size, according to the sizes above. */ |
| #if 0 |
| unsigned char ar_sha[]; /* sender hardware address */ |
| unsigned char ar_spa[]; /* sender protocol address */ |
| unsigned char ar_tha[]; /* target hardware address */ |
| unsigned char ar_tpa[]; /* target protocol address */ |
| #endif /* not actually included! */ |
| }; |
| |
| |
| /* ARP ioctl request. */ |
| struct arpreq { |
| struct sockaddr arp_pa; /* protocol address */ |
| struct sockaddr arp_ha; /* hardware address */ |
| int arp_flags; /* flags */ |
| }; |
| |
| /* ARP Flag values. */ |
| #define ATF_INUSE 0x01 /* entry in use */ |
| #define ATF_COM 0x02 /* completed entry (ha valid) */ |
| #define ATF_PERM 0x04 /* permanent entry */ |
| #define ATF_PUBL 0x08 /* publish entry */ |
| #define ATF_USETRAILERS 0x10 /* has requested trailers */ |
| |
| |
| #endif /* _LINUX_IF_ARP_H */ |
