FreeBSD/Linux Kernel Cross Reference
sys/bsd/net/if_arp.h

     /*
      * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*
     * 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. 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
     * $FreeBSD: src/sys/net/if_arp.h,v 1.14.2.1 2000/07/11 20:46:55 archie Exp $
     */
    
    #ifndef _NET_IF_ARP_H_
    #define _NET_IF_ARP_H_
    #include <sys/appleapiopts.h>
    #include <netinet/in.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 format */
    #define ARPHRD_IEEE802  6       /* token-ring hardware format */
    #define ARPHRD_FRELAY   15      /* frame relay hardware format */
    #define ARPHRD_IEEE1394 24      /* IEEE1394 hardware address */
    #define ARPHRD_IEEE1394_EUI64 27 /* IEEE1394 EUI-64 */
            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 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
            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 */
   
   #ifdef __APPLE_API_UNSTABLE
   
   #ifdef __APPLE__
   /*
    * Ethernet multicast address structure.  There is one of these for each
    * multicast address or range of multicast addresses that we are supposed
    * to listen to on a particular interface.  They are kept in a linked list,
    * rooted in the interface's arpcom structure.  (This really has nothing to
    * do with ARP, or with the Internet address family, but this appears to be
    * the minimally-disrupting place to put it.)
    */
   struct ether_multi {
           u_char  enm_addrlo[6];          /* low  or only address of range */
           u_char  enm_addrhi[6];          /* high or only address of range */
           struct  arpcom *enm_ac;         /* back pointer to arpcom */
           u_int   enm_refcount;           /* no. claims to this addr/range */
           struct  ether_multi *enm_next;  /* ptr to next ether_multi */
   };
   
   /*
    * Structure used by macros below to remember position when stepping through
    * all of the ether_multi records.
    */
   struct ether_multistep {
           struct ether_multi  *e_enm;
   };
   #endif /* __APPLE__ */
   
   #ifdef KERNEL
   /*
    * Structure shared between the ethernet driver modules and
    * the address resolution code.  For example, each ec_softc or il_softc
    * begins with this structure.
    */
   struct  arpcom {
           /*
            * The ifnet struct _must_ be at the head of this structure.
            */
           struct  ifnet ac_if;            /* network-visible interface */
           u_char  ac_enaddr[6];           /* ethernet hardware address */
   #ifdef __APPLE__
           struct  in_addr ac_ipaddr;      /* copy of ip address- XXX */
           struct  ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
   #endif
           int     ac_multicnt;            /* length of ac_multiaddrs list */
   #ifndef __APPLE__
           void    *ac_netgraph;           /* ng_ether(4) netgraph node info */
   #endif
   };
   
   
   #endif
   #endif /* __APPLE_API_UNSTABLE */
   
   #endif /* !_NET_IF_ARP_H_ */

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