FreeBSD/Linux Kernel Cross Reference
sys/net/if_dl.h

     /*      $NetBSD: if_dl.h,v 1.23 2008/02/20 17:18:11 matt Exp $  */
     
     /*
      * 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. 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
     */
    
    /*
     * 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.
     */
    
    #ifndef _NET_IF_DL_H_
    #define _NET_IF_DL_H_
    
    #include <sys/ansi.h>
    
    #ifndef sa_family_t
    typedef __sa_family_t   sa_family_t;
    #define sa_family_t     __sa_family_t
    #endif
    
    /*
     * Structure of a Link-Level sockaddr:
     */
    struct sockaddr_dl {
            uint8_t     sdl_len;    /* Total length of sockaddr */
            sa_family_t sdl_family; /* AF_LINK */
            uint16_t   sdl_index;   /* if != 0, system given index for interface */
            uint8_t     sdl_type;   /* interface type */
            uint8_t     sdl_nlen;   /* interface name length, no trailing 0 reqd. */
            uint8_t     sdl_alen;   /* link level address length */
            uint8_t     sdl_slen;   /* link layer selector length */
            /* minimum work area, can be larger; contains both if name
             * and ll address
             */
            char        sdl_data[12];
    };
    
    #define satosdl(__sa)   ((struct sockaddr_dl *)(__sa))
    #define satocsdl(__sa)  ((const struct sockaddr_dl *)(__sa))
    
    /* We do arithmetic directly with these, so keep them char instead of void */
    #define LLADDR(s) ((char *)((s)->sdl_data + (s)->sdl_nlen))
    #define CLLADDR(s) ((const char *)((s)->sdl_data + (s)->sdl_nlen))
    
    #ifdef _KERNEL
    uint8_t sockaddr_dl_measure(uint8_t, uint8_t);
    struct sockaddr *sockaddr_dl_alloc(uint16_t, uint8_t,
        const void *, uint8_t, const void *, uint8_t, int);
    struct sockaddr_dl *sockaddr_dl_init(struct sockaddr_dl *, socklen_t, uint16_t,
        uint8_t, const void *, uint8_t, const void *, uint8_t);
    struct sockaddr_dl *sockaddr_dl_setaddr(struct sockaddr_dl *, socklen_t,
        const void *, uint8_t);
    #else
    
    #include <sys/cdefs.h>
    
    __BEGIN_DECLS
    void    link_addr(const char *, struct sockaddr_dl *);
   char    *link_ntoa(const struct sockaddr_dl *);
   __END_DECLS
   
   #endif /* !_KERNEL */
   
   #endif /* !_NET_IF_DL_H_ */

Cache object: 2573ed10adb33c6e851ab9323ab79637