LCOM1920-T02G10

/*        $NetBSD: if_arp.h,v 1.30 2015/08/31 08:05:20 ozaki-r Exp $        */

/*

 * Copyright (c) 1986, 1993

 *        The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *        @(#)if_arp.h        8.1 (Berkeley) 6/10/93

 */

#ifndef _NET_IF_ARP_H_

#define _NET_IF_ARP_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 {

        uint16_t ar_hrd;        /* format of hardware address */

#define ARPHRD_ETHER         1        /* ethernet hardware format */

#define ARPHRD_IEEE802         6        /* IEEE 802 hardware format */

#define ARPHRD_ARCNET         7        /* ethernet hardware format */

#define ARPHRD_FRELAY         15        /* frame relay hardware format */

#define ARPHRD_STRIP         23        /* Ricochet Starmode Radio hardware format */

#define        ARPHRD_IEEE1394        24        /* IEEE 1394 (FireWire) hardware format */

        uint16_t ar_pro;        /* format of protocol address */

        uint8_t  ar_hln;        /* length of hardware address */

        uint8_t  ar_pln;        /* length of protocol address */

        uint16_t ar_op;                /* one of: */

#define        ARPOP_REQUEST        1        /* request to resolve address */

#define        ARPOP_REPLY        2        /* response to previous request */

#define        ARPOP_REVREQUEST 3        /* request protocol address given hardware */

#define        ARPOP_REVREPLY        4        /* response giving protocol address */

#define        ARPOP_INVREQUEST 8         /* request to identify peer */

#define        ARPOP_INVREPLY        9        /* response identifying peer */

/*

 * The remaining fields are variable in size,

 * according to the sizes above.

 */

#ifdef COMMENT_ONLY

        uint8_t  ar_sha[];        /* sender hardware address */

        uint8_t  ar_spa[];        /* sender protocol address */

        uint8_t  ar_tha[];        /* target hardware address */

        uint8_t  ar_tpa[];        /* target protocol address */

#endif

#define ar_sha(ap) (((char *)((ap)+1))+0)

#define ar_spa(ap) (((char *)((ap)+1))+(ap)->ar_hln)

#define ar_tha(ap) \

        (ntohs((ap)->ar_hrd) == ARPHRD_IEEE1394 \

                ? NULL : (((char *)((ap)+1))+(ap)->ar_hln+(ap)->ar_pln))

#define ar_tpa(ap) \

        (ntohs((ap)->ar_hrd) == ARPHRD_IEEE1394 \

                ? (((char *)((ap)+1))+(ap)->ar_hln+(ap)->ar_pln) \

                : (((char *)((ap)+1))+(ap)->ar_hln+(ap)->ar_pln+(ap)->ar_hln))

} __packed;

/*

 * 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 */

/*

 * Kernel statistics about arp

 */

#define        ARP_STAT_SNDTOTAL        0        /* total packets sent */

#define        ARP_STAT_SNDREPLY        1        /* replies sent */

#define        ARP_STAT_SENDREQUEST        2        /* requests sent */

#define        ARP_STAT_RCVTOTAL        3        /* total packets received */

#define        ARP_STAT_RCVREQUEST        4        /* valid requests received */

#define        ARP_STAT_RCVREPLY        5        /* replies received */

#define        ARP_STAT_RCVMCAST        6        /* multicast/broadcast received */

#define        ARP_STAT_RCVBADPROTO        7        /* unknown protocol type received */

#define        ARP_STAT_RCVBADLEN        8        /* bad (short) length received */

#define        ARP_STAT_RCVZEROTPA        9        /* received w/ null target ip */

#define        ARP_STAT_RCVZEROSPA        10        /* received w/ null source ip */

#define        ARP_STAT_RCVNOINT        11        /* couldn't map to interface */

#define        ARP_STAT_RCVLOCALSHA        12        /* received from local hw address */

#define        ARP_STAT_RCVBCASTSHA        13        /* received w/ broadcast src */

#define        ARP_STAT_RCVLOCALSPA        14        /* received for a local ip [dup!] */

#define        ARP_STAT_RCVOVERPERM        15        /* attempts to overwrite static info */

#define        ARP_STAT_RCVOVERINT        16        /* attempts to overwrite wrong if */

#define        ARP_STAT_RCVOVER        17        /* entries overwritten! */

#define        ARP_STAT_RCVLENCHG        18        /* changes in hw address len */

#define        ARP_STAT_DFRTOTAL        19        /* deferred pending ARP resolution */

#define        ARP_STAT_DFRSENT        20        /* deferred, then sent */

#define        ARP_STAT_DFRDROPPED        21        /* deferred, then dropped */

#define        ARP_STAT_ALLOCFAIL        22        /* failures to allocate llinfo */

#define        ARP_NSTATS                23

void arp_stat_add(int, uint64_t);

#endif /* !_NET_IF_ARP_H_ */