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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 * $Id: if_llc.h,v 1.2 1994/08/02 07:46:16 davidg Exp $
34 * $Id: if_llc.h,v 1.3 1994/08/21 05:11:42 paul Exp $
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 shortcommings in many
44 * Headers here do not use bit fields due to shortcomings in many
45 * compilers.
46 */
47
48struct 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