if_llc.h

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    1 /*      $OpenBSD: if_llc.h,v 1.8 2013/01/17 00:48:04 henning Exp $      */
    2 /*      $NetBSD: if_llc.h,v 1.6 1995/03/08 02:56:57 cgd Exp $   */
    3 
    4 /*
    5  * Copyright (c) 1988, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      @(#)if_llc.h    8.1 (Berkeley) 6/10/93
   33  */
   34 
   35 #ifndef _NET_IF_LLC_H_
   36 #define _NET_IF_LLC_H_
   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 shortcomings in many
   43  * compilers.
   44  */
   45 
   46 struct llc {
   47         u_int8_t llc_dsap;
   48         u_int8_t llc_ssap;
   49         union {
   50             struct {
   51                 u_int8_t control;
   52                 u_int8_t format_id;
   53                 u_int8_t class;
   54                 u_int8_t window_x2;
   55             } type_u;
   56             struct {
   57                 u_int8_t num_snd_x2;
   58                 u_int8_t num_rcv_x2;
   59             } type_i;
   60             struct {
   61                 u_int8_t control;
   62                 u_int8_t num_rcv_x2;
   63             } type_s;
   64             struct {
   65                 u_int8_t control;
   66                 struct frmrinfo {
   67                         u_int8_t rej_pdu_0;
   68                         u_int8_t rej_pdu_1;
   69                         u_int8_t frmr_control;
   70                         u_int8_t frmr_control_ext;
   71                         u_int8_t frmr_cause;
   72                 } frmrinfo;
   73             } type_frmr;
   74             struct {
   75                 u_int8_t control;
   76                 u_int8_t org_code[3];
   77                 u_int16_t ether_type;
   78             } type_snap;
   79             struct {
   80                 u_int8_t control;
   81                 u_int8_t 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
   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 #define llc_snap                llc_un.type_snap
   97 
   98 /*
   99  * Don't use sizeof(struct llc_un) for LLC header sizes
  100  */
  101 #define LLC_UFRAMELEN           3
  102 #define LLC_ISFRAMELEN          4
  103 #define LLC_FRMRLEN             7
  104 #define LLC_SNAPFRAMELEN        8
  105 
  106 /*
  107  * Unnumbered LLC format commands
  108  */
  109 #define LLC_UI          0x3
  110 #define LLC_UI_P        0x13
  111 #define LLC_DISC        0x43
  112 #define LLC_DISC_P      0x53
  113 #define LLC_UA          0x63
  114 #define LLC_UA_P        0x73
  115 #define LLC_TEST        0xe3
  116 #define LLC_TEST_P      0xf3
  117 #define LLC_FRMR        0x87
  118 #define LLC_FRMR_P      0x97
  119 #define LLC_DM          0x0f
  120 #define LLC_DM_P        0x1f
  121 #define LLC_XID         0xaf
  122 #define LLC_XID_P       0xbf
  123 #define LLC_SABME       0x6f
  124 #define LLC_SABME_P     0x7f
  125 
  126 /*
  127  * Supervisory LLC commands
  128  */
  129 #define LLC_RR          0x01
  130 #define LLC_RNR         0x05
  131 #define LLC_REJ         0x09
  132 
  133 /*
  134  * Info format - dummy only
  135  */
  136 #define LLC_INFO        0x00
  137 
  138 /*
  139  * ISO PDTR 10178 contains among others
  140  */
  141 #define LLC_8021D_LSAP  0x42
  142 #define LLC_X25_LSAP    0x7e
  143 #define LLC_SNAP_LSAP   0xaa
  144 #define LLC_ISO_LSAP    0xfe
  145 #endif /* _NET_IF_LLC_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/net/if_llc.h

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sys/net/if_llc.h