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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 the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, 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'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * @(#)if_arp.h 7.3 (Berkeley) 6/27/88
- */
-
- /*
- * 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 */
- /*
- * 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 */
-