1139823Simp/*- 21541Srgrimes * Copyright (c) 1990, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 4. Neither the name of the University nor the names of its contributors 141541Srgrimes * may be used to endorse or promote products derived from this software 151541Srgrimes * without specific prior written permission. 161541Srgrimes * 171541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271541Srgrimes * SUCH DAMAGE. 281541Srgrimes * 291541Srgrimes * @(#)if_dl.h 8.1 (Berkeley) 6/10/93 3050477Speter * $FreeBSD$ 311541Srgrimes */ 321541Srgrimes 332168Spaul#ifndef _NET_IF_DL_H_ 342168Spaul#define _NET_IF_DL_H_ 352168Spaul 368876Srgrimes/* 371541Srgrimes * A Link-Level Sockaddr may specify the interface in one of two 381541Srgrimes * ways: either by means of a system-provided index number (computed 391541Srgrimes * anew and possibly differently on every reboot), or by a human-readable 401541Srgrimes * string such as "il0" (for managerial convenience). 418876Srgrimes * 421541Srgrimes * Census taking actions, such as something akin to SIOCGCONF would return 431541Srgrimes * both the index and the human name. 448876Srgrimes * 451541Srgrimes * High volume transactions (such as giving a link-level ``from'' address 461541Srgrimes * in a recvfrom or recvmsg call) may be likely only to provide the indexed 471541Srgrimes * form, (which requires fewer copy operations and less space). 488876Srgrimes * 491541Srgrimes * The form and interpretation of the link-level address is purely a matter 501541Srgrimes * of convention between the device driver and its consumers; however, it is 511541Srgrimes * expected that all drivers for an interface of a given if_type will agree. 521541Srgrimes */ 531541Srgrimes 541541Srgrimes/* 551541Srgrimes * Structure of a Link-Level sockaddr: 561541Srgrimes */ 571541Srgrimesstruct sockaddr_dl { 581541Srgrimes u_char sdl_len; /* Total length of sockaddr */ 5957637Sarchie u_char sdl_family; /* AF_LINK */ 601541Srgrimes u_short sdl_index; /* if != 0, system given index for interface */ 611541Srgrimes u_char sdl_type; /* interface type */ 621541Srgrimes u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */ 631541Srgrimes u_char sdl_alen; /* link level address length */ 641541Srgrimes u_char sdl_slen; /* link layer selector length */ 6596184Skbyanc char sdl_data[46]; /* minimum work area, can be larger; 661541Srgrimes contains both if name and ll address */ 671541Srgrimes}; 681541Srgrimes 691541Srgrimes#define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen)) 70287476Smelifaro#define CLLADDR(s) ((c_caddr_t)((s)->sdl_data + (s)->sdl_nlen)) 71235640Smarcel#define LLINDEX(s) ((s)->sdl_index) 721541Srgrimes 73260870Smelifaro 74260870Smelifarostruct ifnet; 75260870Smelifarostruct sockaddr_dl *link_alloc_sdl(size_t, int); 76260870Smelifarovoid link_free_sdl(struct sockaddr *sa); 77260870Smelifarostruct sockaddr_dl *link_init_sdl(struct ifnet *, struct sockaddr *, u_char); 78260870Smelifaro 7955205Speter#ifndef _KERNEL 801541Srgrimes 811541Srgrimes#include <sys/cdefs.h> 821541Srgrimes 831541Srgrimes__BEGIN_DECLS 8492725Salfredvoid link_addr(const char *, struct sockaddr_dl *); 8592725Salfredchar *link_ntoa(const struct sockaddr_dl *); 861541Srgrimes__END_DECLS 871541Srgrimes 8855205Speter#endif /* !_KERNEL */ 892168Spaul 902168Spaul#endif 91