bsd/net/if_llc.h

   1 /*
   2  * Copyright (c) 2000,2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1988, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  *      @(#)if_llc.h    8.1 (Berkeley) 6/10/93
  57  */
  58
  59 #ifndef _NET_IF_LLC_H_
  60 #define _NET_IF_LLC_H_
  61 #include <sys/appleapiopts.h>
  62
  63 /*
  64  * IEEE 802.2 Link Level Control headers, for use in conjunction with
  65  * 802.{3,4,5} media access control methods.
  66  *
  67  * Headers here do not use bit fields due to shortcomings in many
  68  * compilers.
  69  */
  70
  71 struct llc {
  72         u_int8_t llc_dsap;
  73         u_int8_t llc_ssap;
  74         union {
  75                 struct {
  76                         u_int8_t control;
  77                         u_int8_t format_id;
  78                         u_int8_t class_id;
  79                         u_int8_t window_x2;
  80                 } type_u;
  81                 struct {
  82                         u_int8_t num_snd_x2;
  83                         u_int8_t num_rcv_x2;
  84                 } type_i;
  85                 struct {
  86                         u_int8_t control;
  87                         u_int8_t num_rcv_x2;
  88                 } type_s;
  89                 struct {
  90                         u_int8_t control;
  91                         /*
  92                          * We cannot put the following fields in a structure because
  93                          * the structure rounding might cause padding.
  94                          */
  95                         u_int8_t frmr_rej_pdu0;
  96                         u_int8_t frmr_rej_pdu1;
  97                         u_int8_t frmr_control;
  98                         u_int8_t frmr_control_ext;
  99                         u_int8_t frmr_cause;
 100                 } type_frmr;
 101                 struct {
 102                         u_int8_t  control;
 103                         u_int8_t  org_code[3];
 104                         u_int16_t ether_type;
 105                 } type_snap __attribute__((__packed__));
 106                 struct {
 107                         u_int8_t control;
 108                         u_int8_t control_ext;
 109                 } type_raw;
 110         } llc_un;
 111 } __attribute__((__packed__));
 112
 113 struct frmrinfo {
 114         u_int8_t frmr_rej_pdu0;
 115         u_int8_t frmr_rej_pdu1;
 116         u_int8_t frmr_control;
 117         u_int8_t frmr_control_ext;
 118         u_int8_t frmr_cause;
 119 } __attribute__((__packed__));
 120
 121 #define llc_control             llc_un.type_u.control
 122 #define llc_control_ext         llc_un.type_raw.control_ext
 123 #define llc_fid                 llc_un.type_u.format_id
 124 #define llc_class               llc_un.type_u.class
 125 #define llc_window              llc_un.type_u.window_x2
 126 #define llc_frmrinfo            llc_un.type_frmr.frmr_rej_pdu0
 127 #define llc_frmr_pdu0           llc_un.type_frmr.frmr_rej_pdu0
 128 #define llc_frmr_pdu1           llc_un.type_frmr.frmr_rej_pdu1
 129 #define llc_frmr_control        llc_un.type_frmr.frmr_control
 130 #define llc_frmr_control_ext    llc_un.type_frmr.frmr_control_ext
 131 #define llc_frmr_cause          llc_un.type_frmr.frmr_cause
 132 #define llc_snap                llc_un.type_snap
 133
 134 /*
 135  * Don't use sizeof(struct llc_un) for LLC header sizes
 136  */
 137 #define LLC_ISFRAMELEN 4
 138 #define LLC_UFRAMELEN  3
 139 #define LLC_FRMRLEN    7
 140 #define LLC_SNAPFRAMELEN 8
 141
 142 /*
 143  * Unnumbered LLC format commands
 144  */
 145 #define LLC_UI          0x3
 146 #define LLC_UI_P        0x13
 147 #define LLC_DISC        0x43
 148 #define LLC_DISC_P      0x53
 149 #define LLC_UA          0x63
 150 #define LLC_UA_P        0x73
 151 #define LLC_TEST        0xe3
 152 #define LLC_TEST_P      0xf3
 153 #define LLC_FRMR        0x87
 154 #define LLC_FRMR_P      0x97
 155 #define LLC_DM          0x0f
 156 #define LLC_DM_P        0x1f
 157 #define LLC_XID         0xaf
 158 #define LLC_XID_P       0xbf
 159 #define LLC_SABME       0x6f
 160 #define LLC_SABME_P     0x7f
 161
 162 /*
 163  * Supervisory LLC commands
 164  */
 165 #define LLC_RR          0x01
 166 #define LLC_RNR         0x05
 167 #define LLC_REJ         0x09
 168
 169 /*
 170  * Info format - dummy only
 171  */
 172 #define LLC_INFO        0x00
 173
 174 /*
 175  * ISO PDTR 10178 contains among others
 176  */
 177 #define LLC_8021D_LSAP  0x42
 178 #define LLC_X25_LSAP    0x7e
 179 #define LLC_SNAP_LSAP   0xaa
 180 #define LLC_ISO_LSAP    0xfe
 181
 182 /*
 183  * LLC XID definitions from 802.2, as needed
 184  */
 185
 186 #define LLC_XID_FORMAT_BASIC    0x81
 187 #define LLC_XID_BASIC_MINLEN    (LLC_UFRAMELEN + 3)
 188
 189 #define LLC_XID_CLASS_I         0x1
 190 #define LLC_XID_CLASS_II        0x3
 191 #define LLC_XID_CLASS_III       0x5
 192 #define LLC_XID_CLASS_IV        0x7
 193
 194
 195 #endif /* !_NET_IF_LLC_H_ */