FreeBSD/Linux Kernel Cross Reference
sys/bsd/net/if_dl.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) 1990, 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_dl.h     8.1 (Berkeley) 6/10/93
     * $FreeBSD: src/sys/net/if_dl.h,v 1.10 2000/03/01 02:46:25 archie Exp $
     */
    
    #ifndef _NET_IF_DL_H_
    #define _NET_IF_DL_H_
    #include <sys/appleapiopts.h>
    
    /*
     * A Link-Level Sockaddr may specify the interface in one of two
     * ways: either by means of a system-provided index number (computed
     * anew and possibly differently on every reboot), or by a human-readable
     * string such as "il0" (for managerial convenience).
     *
     * Census taking actions, such as something akin to SIOCGCONF would return
     * both the index and the human name.
     *
     * High volume transactions (such as giving a link-level ``from'' address
     * in a recvfrom or recvmsg call) may be likely only to provide the indexed
     * form, (which requires fewer copy operations and less space).
     *
     * The form and interpretation  of the link-level address is purely a matter
     * of convention between the device driver and its consumers; however, it is
     * expected that all drivers for an interface of a given if_type will agree.
     */
    
    /*
     * Structure of a Link-Level sockaddr:
     */
    struct sockaddr_dl {
            u_char  sdl_len;        /* Total length of sockaddr */
            u_char  sdl_family;     /* AF_LINK */
            u_short sdl_index;      /* if != 0, system given index for interface */
            u_char  sdl_type;       /* interface type */
            u_char  sdl_nlen;       /* interface name length, no trailing 0 reqd. */
            u_char  sdl_alen;       /* link level address length */
            u_char  sdl_slen;       /* link layer selector length */
            char    sdl_data[12];   /* minimum work area, can be larger;
                                       contains both if name and ll address */
    #ifndef __APPLE__
            /* For TokenRing */
            u_short sdl_rcf;        /* source routing control */
            u_short sdl_route[16];  /* source routing information */
   #endif
   };
   
   #define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
   
   #ifndef KERNEL
   
   #include <sys/cdefs.h>
   
   __BEGIN_DECLS
   void    link_addr __P((const char *, struct sockaddr_dl *));
   char    *link_ntoa __P((const struct sockaddr_dl *));
   __END_DECLS
   
   #endif /* !KERNEL */
   
   #endif

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