sys/net/if_llc.h

   1 /*
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)if_llc.h    8.1 (Berkeley) 6/10/93
  30  * $FreeBSD: src/sys/net/if_llc.h,v 1.7 1999/08/28 00:48:18 peter Exp $
  31  * $DragonFly: src/sys/net/if_llc.h,v 1.5 2006/05/20 02:42:08 dillon Exp $
  32  */
  33
  34 #ifndef _NET_IF_LLC_H_
  35 #define _NET_IF_LLC_H_
  36
  37 #ifndef _SYS_TYPES_H_
  38 #include <sys/types.h>
  39 #endif
  40
  41 /*
  42  * IEEE 802.2 Link Level Control headers, for use in conjunction with
  43  * 802.{3,4,5} media access control methods.
  44  *
  45  * Headers here do not use bit fields due to shortcomings in many
  46  * compilers.
  47  */
  48
  49 struct llc {
  50         u_char  llc_dsap;
  51         u_char  llc_ssap;
  52         union {
  53             struct {
  54                 u_char control;
  55                 u_char format_id;
  56                 u_char class;
  57                 u_char window_x2;
  58             } type_u;
  59             struct {
  60                 u_char num_snd_x2;
  61                 u_char num_rcv_x2;
  62             } type_i;
  63             struct {
  64                 u_char control;
  65                 u_char num_rcv_x2;
  66             } type_s;
  67             struct {
  68                 u_char control;
  69                 struct frmrinfo {
  70                         u_char rej_pdu_0;
  71                         u_char rej_pdu_1;
  72                         u_char frmr_control;
  73                         u_char frmr_control_ext;
  74                         u_char frmr_cause;
  75                 } frmrinfo;
  76             } type_frmr;
  77             struct {
  78                 u_char control;
  79                 u_char org_code[3];
  80                 u_short ether_type;
  81             } type_snap;
  82             struct {
  83                 u_char control;
  84                 u_char control_ext;
  85             } type_raw;
  86         } llc_un;
  87 };
  88 #define llc_control            llc_un.type_u.control
  89 #define llc_control_ext        llc_un.type_raw.control_ext
  90 #define llc_fid                llc_un.type_u.format_id
  91 #define llc_class              llc_un.type_u.class
  92 #define llc_window             llc_un.type_u.window_x2
  93 #define llc_frmrinfo           llc_un.type_frmr.frmrinfo
  94 #define llc_frmr_pdu0          llc_un.type_frmr.frmrinfo.rej_pdu0
  95 #define llc_frmr_pdu1          llc_un.type_frmr.frmrinfo.rej_pdu1
  96 #define llc_frmr_control       llc_un.type_frmr.frmrinfo.frmr_control
  97 #define llc_frmr_control_ext   llc_un.type_frmr.frmrinfo.frmr_control_ext
  98 #define llc_frmr_cause         llc_un.type_frmr.frmrinfo.frmr_control_ext
  99 #define llc_snap               llc_un.type_snap
 100
 101 /*
 102  * Don't use sizeof(struct llc_un) for LLC header sizes
 103  */
 104 #define LLC_ISFRAMELEN 4
 105 #define LLC_UFRAMELEN  3
 106 #define LLC_FRMRLEN    7
 107 #define LLC_SNAPFRAMELEN 8
 108
 109 /*
 110  * Unnumbered LLC format commands
 111  */
 112 #define LLC_UI          0x3
 113 #define LLC_UI_P        0x13
 114 #define LLC_DISC        0x43
 115 #define LLC_DISC_P      0x53
 116 #define LLC_UA          0x63
 117 #define LLC_UA_P        0x73
 118 #define LLC_TEST        0xe3
 119 #define LLC_TEST_P      0xf3
 120 #define LLC_FRMR        0x87
 121 #define LLC_FRMR_P      0x97
 122 #define LLC_DM          0x0f
 123 #define LLC_DM_P        0x1f
 124 #define LLC_XID         0xaf
 125 #define LLC_XID_P       0xbf
 126 #define LLC_SABME       0x6f
 127 #define LLC_SABME_P     0x7f
 128
 129 /*
 130  * Supervisory LLC commands
 131  */
 132 #define LLC_RR          0x01
 133 #define LLC_RNR         0x05
 134 #define LLC_REJ         0x09
 135
 136 /*
 137  * Info format - dummy only
 138  */
 139 #define LLC_INFO        0x00
 140
 141 /*
 142  * ISO PDTR 10178 contains among others
 143  */
 144 #define LLC_8021D_LSAP  0x42
 145 #define LLC_X25_LSAP    0x7e
 146 #define LLC_SNAP_LSAP   0xaa
 147 #define LLC_ISO_LSAP    0xfe
 148
 149 #endif