1 /* $OpenBSD: if_llc.h,v 1.7 2003/06/02 23:28:12 millert 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 shortcommings 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_ */