FreeBSD/Linux Kernel Cross Reference
sys/net/if_llc.h
1 /* $NetBSD: if_llc.h,v 1.12 1999/11/19 20:41:19 thorpej Exp $ */
2
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 * 4. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)if_llc.h 8.1 (Berkeley) 6/10/93
32 * $FreeBSD: src/sys/net/if_llc.h,v 1.13 2006/12/01 17:50:11 imp Exp $
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 } __packed type_u;
56 struct {
57 u_int8_t num_snd_x2;
58 u_int8_t num_rcv_x2;
59 } __packed type_i;
60 struct {
61 u_int8_t control;
62 u_int8_t num_rcv_x2;
63 } __packed type_s;
64 struct {
65 u_int8_t control;
66 /*
67 * We cannot put the following fields in a structure because
68 * the structure rounding might cause padding.
69 */
70 u_int8_t frmr_rej_pdu0;
71 u_int8_t frmr_rej_pdu1;
72 u_int8_t frmr_control;
73 u_int8_t frmr_control_ext;
74 u_int8_t frmr_cause;
75 } __packed type_frmr;
76 struct {
77 u_int8_t control;
78 u_int8_t org_code[3];
79 u_int16_t ether_type;
80 } __packed type_snap;
81 struct {
82 u_int8_t control;
83 u_int8_t control_ext;
84 } __packed type_raw;
85 } __packed llc_un;
86 } __packed;
87
88 struct frmrinfo {
89 u_int8_t frmr_rej_pdu0;
90 u_int8_t frmr_rej_pdu1;
91 u_int8_t frmr_control;
92 u_int8_t frmr_control_ext;
93 u_int8_t frmr_cause;
94 } __packed;
95
96 #define llc_control llc_un.type_u.control
97 #define llc_control_ext llc_un.type_raw.control_ext
98 #define llc_fid llc_un.type_u.format_id
99 #define llc_class llc_un.type_u.class
100 #define llc_window llc_un.type_u.window_x2
101 #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0
102 #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0
103 #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1
104 #define llc_frmr_control llc_un.type_frmr.frmr_control
105 #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext
106 #define llc_frmr_cause llc_un.type_frmr.frmr_cause
107 #define llc_snap llc_un.type_snap
108
109 /*
110 * Don't use sizeof(struct llc_un) for LLC header sizes
111 */
112 #define LLC_ISFRAMELEN 4
113 #define LLC_UFRAMELEN 3
114 #define LLC_FRMRLEN 7
115 #define LLC_SNAPFRAMELEN 8
116
117 #ifdef CTASSERT
118 CTASSERT(sizeof (struct llc) == LLC_SNAPFRAMELEN);
119 #endif
120
121 /*
122 * Unnumbered LLC format commands
123 */
124 #define LLC_UI 0x3
125 #define LLC_UI_P 0x13
126 #define LLC_DISC 0x43
127 #define LLC_DISC_P 0x53
128 #define LLC_UA 0x63
129 #define LLC_UA_P 0x73
130 #define LLC_TEST 0xe3
131 #define LLC_TEST_P 0xf3
132 #define LLC_FRMR 0x87
133 #define LLC_FRMR_P 0x97
134 #define LLC_DM 0x0f
135 #define LLC_DM_P 0x1f
136 #define LLC_XID 0xaf
137 #define LLC_XID_P 0xbf
138 #define LLC_SABME 0x6f
139 #define LLC_SABME_P 0x7f
140
141 /*
142 * Supervisory LLC commands
143 */
144 #define LLC_RR 0x01
145 #define LLC_RNR 0x05
146 #define LLC_REJ 0x09
147
148 /*
149 * Info format - dummy only
150 */
151 #define LLC_INFO 0x00
152
153 /*
154 * ISO PDTR 10178 contains among others
155 */
156 #define LLC_8021D_LSAP 0x42
157 #define LLC_X25_LSAP 0x7e
158 #define LLC_SNAP_LSAP 0xaa
159 #define LLC_ISO_LSAP 0xfe
160
161 #endif /* _NET_IF_LLC_H_ */
162
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