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IF_ARP.H
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1995-12-04
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/********************************************************copyrite.xmc***/
/* */
/* Licensed Materials - Property of IBM */
/* */
/* This module is "Restricted Materials of IBM": */
/* Program Number: 5798RXW */
/* Program Name: IBM TCP/IP Version 1.2 for OS/2 */
/* (C) Copyright IBM Corporation. 1990, 1991. */
/* */
/* See IBM Copyright Instructions. */
/* */
/********************************************************copyrite.xmc***/
#ifndef __IF_ARP_32H
#define __IF_ARP_32H
/*
* Copyright (c) 1986 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*
* @(#)if_arp.h 7.2 (Berkeley) 12/30/87
*/
/*
* 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 {
u_short ar_hrd; /* format of hardware address */
#define ARPHRD_ETHER 1 /* ethernet hardware address */
#define ARPHRD_802 6 /* 802 net hardware address */
u_short ar_pro; /* format of protocol address */
u_char ar_hln; /* length of hardware address */
u_char ar_pln; /* length of protocol address */
u_short ar_op; /* one of: */
#define ARPOP_REQUEST 1 /* request to resolve address */
#define ARPOP_REPLY 2 /* response to previous request */
/*
* The remaining fields are variable in size,
* according to the sizes above.
*/
/* u_char ar_sha[]; */ /* sender hardware address */
/* u_char ar_spa[]; */ /* sender protocol address */
/* u_char ar_tha[]; */ /* target hardware address */
/* u_char ar_tpa[]; */ /* target protocol address */
};
/*
* ARP ioctl request
*/
struct arpreq {
struct sockaddr arp_pa; /* protocol address */
struct sockaddr arp_ha; /* hardware address */
int arp_flags; /* flags */
};
/* arp_flags and at_flags field values */
#define ATF_INUSE 0x01 /* entry in use */
#define ATF_COM 0x02 /* completed entry (enaddr valid) */
#define ATF_PERM 0x04 /* permanent entry */
#define ATF_PUBL 0x08 /* publish entry (respond for other host) */
#define ATF_USETRAILERS 0x10 /* has requested trailers */
#endif /* __IF_ARP_32H */