workbench/network/common/include/net/if_llc.h

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