text: /*	$OpenBSD: if_llc.h,v 1.8 2013/01/17 00:48:04 henning Exp $	*/
  /*	$NetBSD: if_llc.h,v 1.6 1995/03/08 02:56:57 cgd Exp $	*/
  
  /*
   * 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. 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
   */
  
  #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_int8_t llc_dsap;
  	u_int8_t llc_ssap;
  	union {
  	    struct {
  		u_int8_t control;
  		u_int8_t format_id;
  		u_int8_t class;
  		u_int8_t window_x2;
  	    } type_u;
  	    struct {
  		u_int8_t num_snd_x2;
  		u_int8_t num_rcv_x2;
  	    } type_i;
  	    struct {
  		u_int8_t control;
  		u_int8_t num_rcv_x2;
  	    } type_s;
  	    struct {
  		u_int8_t control;
  		struct frmrinfo {
  			u_int8_t rej_pdu_0;
  			u_int8_t rej_pdu_1;
  			u_int8_t frmr_control;
  			u_int8_t frmr_control_ext;
  			u_int8_t frmr_cause;
  		} frmrinfo;
  	    } type_frmr;
  	    struct {
  		u_int8_t control;
  		u_int8_t org_code[3];
  		u_int16_t ether_type;
  	    } type_snap;
  	    struct {
  		u_int8_t control;
  		u_int8_t 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
  #define	llc_snap		llc_un.type_snap
  
  /*
   * Don't use sizeof(struct llc_un) for LLC header sizes
   */
  #define	LLC_UFRAMELEN		3
  #define	LLC_ISFRAMELEN		4
  #define	LLC_FRMRLEN		7
  #define	LLC_SNAPFRAMELEN	8
  
  /*
   * 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_8021D_LSAP	0x42
  #define	LLC_X25_LSAP	0x7e
  #define	LLC_SNAP_LSAP	0xaa
  #define	LLC_ISO_LSAP	0xfe
  #endif /* _NET_IF_LLC_H_ */
  