Home | History | Annotate | Line # | Download | only in net
if_dl.h revision 1.18.40.1
      1  1.18.40.1     skrll /*	$NetBSD: if_dl.h,v 1.18.40.1 2007/08/15 13:49:38 skrll Exp $	*/
      2        1.5       cgd 
      3        1.1       cgd /*
      4        1.4   mycroft  * Copyright (c) 1990, 1993
      5        1.4   mycroft  *	The Regents of the University of California.  All rights reserved.
      6        1.1       cgd  *
      7        1.1       cgd  * Redistribution and use in source and binary forms, with or without
      8        1.1       cgd  * modification, are permitted provided that the following conditions
      9        1.1       cgd  * are met:
     10        1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     11        1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     12        1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13        1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     14        1.1       cgd  *    documentation and/or other materials provided with the distribution.
     15       1.12       agc  * 3. Neither the name of the University nor the names of its contributors
     16        1.1       cgd  *    may be used to endorse or promote products derived from this software
     17        1.1       cgd  *    without specific prior written permission.
     18        1.1       cgd  *
     19        1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20        1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21        1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22        1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23        1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24        1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25        1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26        1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27        1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28        1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29        1.1       cgd  * SUCH DAMAGE.
     30        1.1       cgd  *
     31        1.5       cgd  *	@(#)if_dl.h	8.1 (Berkeley) 6/10/93
     32        1.1       cgd  */
     33        1.1       cgd 
     34       1.14     perry /*
     35        1.1       cgd  * A Link-Level Sockaddr may specify the interface in one of two
     36        1.1       cgd  * ways: either by means of a system-provided index number (computed
     37        1.1       cgd  * anew and possibly differently on every reboot), or by a human-readable
     38        1.1       cgd  * string such as "il0" (for managerial convenience).
     39       1.14     perry  *
     40        1.1       cgd  * Census taking actions, such as something akin to SIOCGCONF would return
     41        1.1       cgd  * both the index and the human name.
     42       1.14     perry  *
     43        1.1       cgd  * High volume transactions (such as giving a link-level ``from'' address
     44        1.1       cgd  * in a recvfrom or recvmsg call) may be likely only to provide the indexed
     45        1.1       cgd  * form, (which requires fewer copy operations and less space).
     46       1.14     perry  *
     47        1.1       cgd  * The form and interpretation  of the link-level address is purely a matter
     48        1.1       cgd  * of convention between the device driver and its consumers; however, it is
     49        1.1       cgd  * expected that all drivers for an interface of a given if_type will agree.
     50        1.1       cgd  */
     51        1.1       cgd 
     52        1.9     perry #ifndef _NET_IF_DL_H_
     53        1.9     perry #define _NET_IF_DL_H_
     54        1.9     perry 
     55       1.10    kleink #include <sys/ansi.h>
     56       1.10    kleink 
     57       1.10    kleink #ifndef sa_family_t
     58       1.10    kleink typedef __sa_family_t	sa_family_t;
     59       1.11    kleink #define sa_family_t	__sa_family_t
     60       1.10    kleink #endif
     61       1.10    kleink 
     62        1.1       cgd /*
     63        1.1       cgd  * Structure of a Link-Level sockaddr:
     64        1.1       cgd  */
     65        1.1       cgd struct sockaddr_dl {
     66       1.10    kleink 	u_char	    sdl_len;	/* Total length of sockaddr */
     67       1.13       wiz 	sa_family_t sdl_family;	/* AF_LINK */
     68       1.10    kleink 	u_int16_t   sdl_index;	/* if != 0, system given index for interface */
     69       1.10    kleink 	u_char	    sdl_type;	/* interface type */
     70       1.10    kleink 	u_char	    sdl_nlen;	/* interface name length, no trailing 0 reqd. */
     71       1.10    kleink 	u_char	    sdl_alen;	/* link level address length */
     72       1.10    kleink 	u_char	    sdl_slen;	/* link layer selector length */
     73  1.18.40.1     skrll 	/* sdl_data contains both if name and ll address */
     74  1.18.40.1     skrll 	char	    sdl_data[32];
     75        1.1       cgd };
     76        1.1       cgd 
     77  1.18.40.1     skrll #define	satosdl(__sa)	((struct sockaddr_dl *)(__sa))
     78  1.18.40.1     skrll #define	satocsdl(__sa)	((const struct sockaddr_dl *)(__sa))
     79  1.18.40.1     skrll 
     80       1.16  christos /* We do arithmetic directly with these, so keep them char instead of void */
     81       1.16  christos #define LLADDR(s) ((char *)((s)->sdl_data + (s)->sdl_nlen))
     82       1.16  christos #define CLLADDR(s) ((const char *)((s)->sdl_data + (s)->sdl_nlen))
     83        1.1       cgd 
     84  1.18.40.1     skrll #ifdef _KERNEL
     85  1.18.40.1     skrll uint8_t sockaddr_dl_measure(uint8_t, uint8_t);
     86  1.18.40.1     skrll void sockaddr_dl_init(struct sockaddr_dl *, uint16_t, uint8_t,
     87  1.18.40.1     skrll     const void *, uint8_t, const void *, uint8_t);
     88  1.18.40.1     skrll struct sockaddr_dl *sockaddr_dl_setaddr(struct sockaddr_dl *, const void *,
     89  1.18.40.1     skrll     uint8_t);
     90  1.18.40.1     skrll #else
     91        1.1       cgd 
     92        1.1       cgd #include <sys/cdefs.h>
     93        1.1       cgd 
     94        1.1       cgd __BEGIN_DECLS
     95       1.18   thorpej void	link_addr(const char *, struct sockaddr_dl *);
     96       1.18   thorpej char	*link_ntoa(const struct sockaddr_dl *);
     97        1.1       cgd __END_DECLS
     98        1.1       cgd 
     99        1.8       jtc #endif /* !_KERNEL */
    100        1.9     perry 
    101       1.17      elad #endif /* !_NET_IF_DL_H_ */
    102