1/*
2 * Copyright (c) 2000,2009 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright (c) 1988, 1993
30 * The Regents of the University of California. All rights reserved.
31 *
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
34 * are met:
35 * 1. Redistributions of source code must retain the above copyright
36 * notice, this list of conditions and the following disclaimer.
37 * 2. Redistributions in binary form must reproduce the above copyright
38 * notice, this list of conditions and the following disclaimer in the
39 * documentation and/or other materials provided with the distribution.
40 * 3. Neither the name of the University nor the names of its contributors
41 * may be used to endorse or promote products derived from this software
42 * without specific prior written permission.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 * SUCH DAMAGE.
55 *
56 * @(#)if_llc.h 8.1 (Berkeley) 6/10/93
57 */
58
59#ifndef _NET_IF_LLC_H_
60#define _NET_IF_LLC_H_
61#include <sys/appleapiopts.h>
62
63/*
64 * IEEE 802.2 Link Level Control headers, for use in conjunction with
65 * 802.{3,4,5} media access control methods.
66 *
67 * Headers here do not use bit fields due to shortcomings in many
68 * compilers.
69 */
70
71struct llc {
72 u_int8_t llc_dsap;
73 u_int8_t llc_ssap;
74 union {
75 struct {
76 u_int8_t control;
77 u_int8_t format_id;
78 u_int8_t class_id;
79 u_int8_t window_x2;
80 } type_u;
81 struct {
82 u_int8_t num_snd_x2;
83 u_int8_t num_rcv_x2;
84 } type_i;
85 struct {
86 u_int8_t control;
87 u_int8_t num_rcv_x2;
88 } type_s;
89 struct {
90 u_int8_t control;
91 /*
92 * We cannot put the following fields in a structure because
93 * the structure rounding might cause padding.
94 */
95 u_int8_t frmr_rej_pdu0;
96 u_int8_t frmr_rej_pdu1;
97 u_int8_t frmr_control;
98 u_int8_t frmr_control_ext;
99 u_int8_t frmr_cause;
100 } type_frmr;
101 struct {
102 u_int8_t control;
103 u_int8_t org_code[3];
104 u_int16_t ether_type;
105 } type_snap __attribute__((__packed__));
106 struct {
107 u_int8_t control;
108 u_int8_t control_ext;
109 } type_raw;
110 } llc_un;
111} __attribute__((__packed__));
112
113struct frmrinfo {
114 u_int8_t frmr_rej_pdu0;
115 u_int8_t frmr_rej_pdu1;
116 u_int8_t frmr_control;
117 u_int8_t frmr_control_ext;
118 u_int8_t frmr_cause;
119} __attribute__((__packed__));
120
121#define llc_control llc_un.type_u.control
122#define llc_control_ext llc_un.type_raw.control_ext
123#define llc_fid llc_un.type_u.format_id
124#define llc_class llc_un.type_u.class
125#define llc_window llc_un.type_u.window_x2
126#define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0
127#define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0
128#define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1
129#define llc_frmr_control llc_un.type_frmr.frmr_control
130#define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext
131#define llc_frmr_cause llc_un.type_frmr.frmr_cause
132#define llc_snap llc_un.type_snap
133
134/*
135 * Don't use sizeof(struct llc_un) for LLC header sizes
136 */
137#define LLC_ISFRAMELEN 4
138#define LLC_UFRAMELEN 3
139#define LLC_FRMRLEN 7
140#define LLC_SNAPFRAMELEN 8
141
142/*
143 * Unnumbered LLC format commands
144 */
145#define LLC_UI 0x3
146#define LLC_UI_P 0x13
147#define LLC_DISC 0x43
148#define LLC_DISC_P 0x53
149#define LLC_UA 0x63
150#define LLC_UA_P 0x73
151#define LLC_TEST 0xe3
152#define LLC_TEST_P 0xf3
153#define LLC_FRMR 0x87
154#define LLC_FRMR_P 0x97
155#define LLC_DM 0x0f
156#define LLC_DM_P 0x1f
157#define LLC_XID 0xaf
158#define LLC_XID_P 0xbf
159#define LLC_SABME 0x6f
160#define LLC_SABME_P 0x7f
161
162/*
163 * Supervisory LLC commands
164 */
165#define LLC_RR 0x01
166#define LLC_RNR 0x05
167#define LLC_REJ 0x09
168
169/*
170 * Info format - dummy only
171 */
172#define LLC_INFO 0x00
173
174/*
175 * ISO PDTR 10178 contains among others
176 */
177#define LLC_8021D_LSAP 0x42
178#define LLC_X25_LSAP 0x7e
179#define LLC_SNAP_LSAP 0xaa
180#define LLC_ISO_LSAP 0xfe
181
182/*
183 * LLC XID definitions from 802.2, as needed
184 */
185
186#define LLC_XID_FORMAT_BASIC 0x81
187#define LLC_XID_BASIC_MINLEN (LLC_UFRAMELEN + 3)
188
189#define LLC_XID_CLASS_I 0x1
190#define LLC_XID_CLASS_II 0x3
191#define LLC_XID_CLASS_III 0x5
192#define LLC_XID_CLASS_IV 0x7
193
194
195#endif /* !_NET_IF_LLC_H_ */
196