if_arp.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* Copyright 1997-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef _NET_IF_ARP_H
#define _NET_IF_ARP_H
#pragma ident "%Z%%M% %I% %E% SMI"
/* if_arp.h 1.5 88/08/19 SMI; from UCB 7.1 1/24/86 */
#ifdef __cplusplus
extern "C" {
#endif
/*
* 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 {
ushort_t ar_hrd; /* format of hardware address */
#define ARPHRD_ETHER 1 /* ethernet hardware address */
#define ARPHRD_IB 32 /* IPoIB hardware address */
ushort_t ar_pro; /* format of protocol address */
uchar_t ar_hln; /* length of hardware address */
uchar_t ar_pln; /* length of protocol address */
ushort_t 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 */
#define REVARP_REPLY 4 /* Reverse ARP reply */
/*
* The remaining fields are variable in size,
* according to the sizes above, and are defined
* as appropriate for specific hardware/protocol
* combinations. (E.g., see <netinet/if_ether.h>.)
*/
#ifdef notdef
uchar_t ar_sha[]; /* sender hardware address */
uchar_t ar_spa[]; /* sender protocol address */
uchar_t ar_tha[]; /* target hardware address */
uchar_t ar_tpa[]; /* target protocol address */
#endif /* notdef */
};
/*
* Extended ARP ioctl request
*/
struct xarpreq {
struct sockaddr_storage xarp_pa; /* protocol address */
struct sockaddr_dl xarp_ha; /* hardware address */
int xarp_flags; /* flags */
};
/*
* BSD 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 */
/*
* This data structure is used by kernel protocol modules to register
* their interest in a particular packet type with the Ethernet drivers.
* For example, other kinds of ARP would use this, XNS, ApleTalk, etc.
*/
struct ether_family {
int ef_family; /* address family */
ushort_t ef_ethertype; /* ethernet type field */
struct ifqueue *(*ef_infunc)(); /* input function */
int (*ef_outfunc)(); /* output function */
int (*ef_netisr)(); /* soft interrupt function */
struct ether_family *ef_next; /* link to next on list */
};
#ifdef __cplusplus
}
#endif
#endif /* _NET_IF_ARP_H */