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- /*
- * Mach Operating System
- * Copyright (c) 1987 Carnegie-Mellon University
- * All rights reserved. The CMU software License Agreement specifies
- * the terms and conditions for use and redistribution.
- */
-
- /*
- * Copyright (c) 1986 Regents of the University of California.
- * All rights reserved. The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
- *
- * @(#)if_arp.h 7.1 (Berkeley) 6/4/86
- */
-
- /*
- * HISTORY
- * 20-Oct-87 Peter King (king) at NeXT, Inc.
- * SUN_RPC: Added Sun's RARP support.
- */
-
- /* @(#)if_arp.h 2.1 88/05/18 4.0NFSSRC SMI; from UCB 7.1 6/5/86 */
-
- /*
- * 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 /* Reverse ARP request (SUN_RPC) */
- #define REVARP_REPLY 4 /* Reverse ARP reply (SUN_RPC) */
- /*
- * The remaining fields are variable in size,
- * according to the sizes above.
- */
- #ifdef notdef
- 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 */
-