LCOM1920-T02G10

/*        $NetBSD: if_dl.h,v 1.26 2014/12/03 01:31:37 christos 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

#ifndef socklen_t

typedef __socklen_t   socklen_t;

#define socklen_t     __socklen_t

#endif

struct dl_addr {

        uint8_t            dl_type;        /* interface type */

        uint8_t            dl_nlen;        /* interface name length, no trailing 0 reqd. */

        uint8_t            dl_alen;        /* link level address length */

        uint8_t            dl_slen;        /* link layer selector length */

        /*

         * minimum work area, can be larger; contains both if name

         * and ll address

         */

        char            dl_data[12];

};

/*

 * 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 */

        struct dl_addr sdl_addr;

#define sdl_type        sdl_addr.dl_type

#define sdl_nlen        sdl_addr.dl_nlen

#define sdl_alen        sdl_addr.dl_alen

#define sdl_slen        sdl_addr.dl_slen

#define sdl_data        sdl_addr.dl_data

};

#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 */

#if defined(_KERNEL) || defined(_TEST)

// 255 xx: + 255 'a' + / + # + 3 digits + NUL

#define LINK_ADDRSTRLEN        ((255 * 4) + 5)

int        dl_print(char *, size_t, const struct dl_addr *);

#define DL_PRINT(b, a) (dl_print((b), sizeof(b), (a)), (b))

int        sdl_print(char *, size_t, const void *);

#endif

#endif /* !_NET_IF_DL_H_ */