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//==========================================================================

//

//      include/net/if_llc.h

//

//==========================================================================

//####BSDCOPYRIGHTBEGIN####

//

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//

// Portions of this software may have been derived from OpenBSD, 

// FreeBSD or other sources, and are covered by the appropriate

// copyright disclaimers included herein.

//

// Portions created by Red Hat are

// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.

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//####BSDCOPYRIGHTEND####

//==========================================================================

/*

 * Copyright (c) 1988, 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_llc.h    8.1 (Berkeley) 6/10/93

 * $FreeBSD: src/sys/net/if_llc.h,v 1.7 1999/08/28 00:48:18 peter Exp $

 */

#ifndef _NET_IF_LLC_H_

#define _NET_IF_LLC_H_

/*

 * IEEE 802.2 Link Level Control headers, for use in conjunction with

 * 802.{3,4,5} media access control methods.

 *

 * Headers here do not use bit fields due to shortcomings in many

 * compilers.

 */

struct llc {

        u_char  llc_dsap;

        u_char  llc_ssap;

        union {

            struct {

                u_char control;

                u_char format_id;

                u_char class;

                u_char window_x2;

            } type_u;

            struct {

                u_char num_snd_x2;

                u_char num_rcv_x2;

            } type_i;

            struct {

                u_char control;

                u_char num_rcv_x2;

            } type_s;

            struct {

                u_char control;

                struct frmrinfo {

                        u_char rej_pdu_0;

                        u_char rej_pdu_1;

                        u_char frmr_control;

                        u_char frmr_control_ext;

                        u_char frmr_cause;

                } frmrinfo;

            } type_frmr;

            struct {

                u_char control;

                u_char org_code[3];

                u_short ether_type;

            } type_snap;

            struct {

                u_char control;

                u_char control_ext;

            } type_raw;

        } llc_un;

};

#define llc_control            llc_un.type_u.control

#define llc_control_ext        llc_un.type_raw.control_ext

#define llc_fid                llc_un.type_u.format_id

#define llc_class              llc_un.type_u.class

#define llc_window             llc_un.type_u.window_x2

#define llc_frmrinfo           llc_un.type_frmr.frmrinfo

#define llc_frmr_pdu0          llc_un.type_frmr.frmrinfo.rej_pdu0

#define llc_frmr_pdu1          llc_un.type_frmr.frmrinfo.rej_pdu1

#define llc_frmr_control       llc_un.type_frmr.frmrinfo.frmr_control

#define llc_frmr_control_ext   llc_un.type_frmr.frmrinfo.frmr_control_ext

#define llc_frmr_cause         llc_un.type_frmr.frmrinfo.frmr_control_ext

/*

 * Don't use sizeof(struct llc_un) for LLC header sizes

 */

#define LLC_ISFRAMELEN 4

#define LLC_UFRAMELEN  3

#define LLC_FRMRLEN    7

/*

 * Unnumbered LLC format commands

 */

#define LLC_UI          0x3

#define LLC_UI_P        0x13

#define LLC_DISC        0x43

#define LLC_DISC_P      0x53

#define LLC_UA          0x63

#define LLC_UA_P        0x73

#define LLC_TEST        0xe3

#define LLC_TEST_P      0xf3

#define LLC_FRMR        0x87

#define LLC_FRMR_P      0x97

#define LLC_DM          0x0f

#define LLC_DM_P        0x1f

#define LLC_XID         0xaf

#define LLC_XID_P       0xbf

#define LLC_SABME       0x6f

#define LLC_SABME_P     0x7f

/*

 * Supervisory LLC commands

 */

#define LLC_RR          0x01

#define LLC_RNR         0x05

#define LLC_REJ         0x09

/*

 * Info format - dummy only

 */

#define LLC_INFO        0x00

/*

 * ISO PDTR 10178 contains among others

 */

#define LLC_X25_LSAP    0x7e

#define LLC_SNAP_LSAP   0xaa

#define LLC_ISO_LSAP    0xfe

#endif