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- /*
- * 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
- * $Header: /sprite/src/lib/include/net/RCS/if_arp.h,v 1.5 90/11/29 19:39:48 kupfer Exp $
- */
-
- #ifndef _IF_ARP
- #define _IF_ARP
-
- #include <sys/socket.h>
-
- /*
- * 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 */
- 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 */
- #define REVARP_REQUEST 3 /* request for reverse ARP */
- #define REVARP_REPLY 4 /* response to RARP request */
- /*
- * The remaining fields are variable in size, according to the
- * sizes above, and are defined on a network-by-network basis.
- * For example, see <netinet/if_ether.h> for Ethernet-to-and-from-IP
- * translation.
- */
- #if 0
- 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 */
- #endif
- };
-
- /*
- * 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
-