if_llc.h

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    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. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)if_llc.h    8.1 (Berkeley) 6/10/93
   34  * $FreeBSD$
   35  */
   36 
   37 #ifndef _NET_IF_LLC_H_
   38 #define _NET_IF_LLC_H_
   39 
   40 /*
   41  * IEEE 802.2 Link Level Control headers, for use in conjunction with
   42  * 802.{3,4,5} media access control methods.
   43  *
   44  * Headers here do not use bit fields due to shortcomings in many
   45  * compilers.
   46  */
   47 
   48 struct llc {
   49         u_char  llc_dsap;
   50         u_char  llc_ssap;
   51         union {
   52             struct {
   53                 u_char control;
   54                 u_char format_id;
   55                 u_char class;
   56                 u_char window_x2;
   57             } type_u;
   58             struct {
   59                 u_char num_snd_x2;
   60                 u_char num_rcv_x2;
   61             } type_i;
   62             struct {
   63                 u_char control;
   64                 u_char num_rcv_x2;
   65             } type_s;
   66             struct {
   67                 u_char control;
   68                 struct frmrinfo {
   69                         u_char rej_pdu_0;
   70                         u_char rej_pdu_1;
   71                         u_char frmr_control;
   72                         u_char frmr_control_ext;
   73                         u_char frmr_cause;
   74                 } frmrinfo;
   75             } type_frmr;
   76             struct {
   77                 u_char control;
   78                 u_char org_code[3];
   79                 u_short ether_type;
   80             } type_snap;
   81             struct {
   82                 u_char control;
   83                 u_char control_ext;
   84             } type_raw;
   85         } llc_un;
   86 };
   87 #define llc_control            llc_un.type_u.control
   88 #define llc_control_ext        llc_un.type_raw.control_ext
   89 #define llc_fid                llc_un.type_u.format_id
   90 #define llc_class              llc_un.type_u.class
   91 #define llc_window             llc_un.type_u.window_x2
   92 #define llc_frmrinfo           llc_un.type_frmr.frmrinfo
   93 #define llc_frmr_pdu0          llc_un.type_frmr.frmrinfo.rej_pdu0
   94 #define llc_frmr_pdu1          llc_un.type_frmr.frmrinfo.rej_pdu1
   95 #define llc_frmr_control       llc_un.type_frmr.frmrinfo.frmr_control
   96 #define llc_frmr_control_ext   llc_un.type_frmr.frmrinfo.frmr_control_ext
   97 #define llc_frmr_cause         llc_un.type_frmr.frmrinfo.frmr_control_ext
   98 
   99 /*
  100  * Don't use sizeof(struct llc_un) for LLC header sizes
  101  */
  102 #define LLC_ISFRAMELEN 4
  103 #define LLC_UFRAMELEN  3
  104 #define LLC_FRMRLEN    7
  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_X25_LSAP    0x7e
  142 #define LLC_SNAP_LSAP   0xaa
  143 #define LLC_ISO_LSAP    0xfe
  144 
  145 #endif

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

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sys/net/if_llc.h