1 | /* $NetBSD: if_llc.h,v 1.21 2014/09/05 05:32:07 matt 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 | * 3. 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 | */ |
33 | |
34 | #ifndef _NET_IF_LLC_H_ |
35 | #define _NET_IF_LLC_H_ |
36 | |
37 | /* |
38 | * IEEE 802.2 Link Level Control headers, for use in conjunction with |
39 | * 802.{3,4,5} media access control methods. |
40 | * |
41 | * Headers here do not use bit fields due to shortcommings in many |
42 | * compilers. |
43 | */ |
44 | |
45 | struct llc { |
46 | uint8_t llc_dsap; |
47 | uint8_t llc_ssap; |
48 | union { |
49 | struct { |
50 | uint8_t control; |
51 | uint8_t format_id; |
52 | uint8_t class_u; |
53 | uint8_t window_x2; |
54 | } type_u /* XXX __packed ??? */; |
55 | struct { |
56 | uint8_t num_snd_x2; |
57 | uint8_t num_rcv_x2; |
58 | } type_i /* XXX __packed ??? */; |
59 | struct { |
60 | uint8_t control; |
61 | uint8_t num_rcv_x2; |
62 | } type_s /* XXX __packed ??? */; |
63 | struct { |
64 | uint8_t control; |
65 | /* |
66 | * We cannot put the following fields in a structure because |
67 | * the structure rounding might cause padding. |
68 | */ |
69 | uint8_t frmr_rej_pdu0; |
70 | uint8_t frmr_rej_pdu1; |
71 | uint8_t frmr_control; |
72 | uint8_t frmr_control_ext; |
73 | uint8_t frmr_cause; |
74 | } type_frmr /* XXX __packed ??? */; |
75 | struct { |
76 | uint8_t control; |
77 | uint8_t org_code[3]; |
78 | uint16_t ether_type; |
79 | } type_snap __packed; |
80 | struct { |
81 | uint8_t control; |
82 | uint8_t control_ext; |
83 | } type_raw /* XXX __packed ??? */; |
84 | } llc_un /* XXX __packed ??? */; |
85 | } __packed; |
86 | |
87 | struct frmrinfo { |
88 | uint8_t frmr_rej_pdu0; |
89 | uint8_t frmr_rej_pdu1; |
90 | uint8_t frmr_control; |
91 | uint8_t frmr_control_ext; |
92 | uint8_t frmr_cause; |
93 | } __packed; |
94 | |
95 | #define llc_control llc_un.type_u.control |
96 | #define llc_control_ext llc_un.type_raw.control_ext |
97 | #define llc_fid llc_un.type_u.format_id |
98 | #define llc_class llc_un.type_u.class_u |
99 | #define llc_window llc_un.type_u.window_x2 |
100 | #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0 |
101 | #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0 |
102 | #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1 |
103 | #define llc_frmr_control llc_un.type_frmr.frmr_control |
104 | #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext |
105 | #define llc_frmr_cause llc_un.type_frmr.frmr_cause |
106 | #define llc_snap llc_un.type_snap |
107 | |
108 | /* |
109 | * Don't use sizeof(struct llc_un) for LLC header sizes |
110 | */ |
111 | #define LLC_ISFRAMELEN 4 |
112 | #define LLC_UFRAMELEN 3 |
113 | #define LLC_FRMRLEN 7 |
114 | #define LLC_SNAPFRAMELEN 8 |
115 | |
116 | /* |
117 | * Unnumbered LLC format commands |
118 | */ |
119 | #define LLC_UI 0x3 |
120 | #define LLC_UI_P 0x13 |
121 | #define LLC_DISC 0x43 |
122 | #define LLC_DISC_P 0x53 |
123 | #define LLC_UA 0x63 |
124 | #define LLC_UA_P 0x73 |
125 | #define LLC_TEST 0xe3 |
126 | #define LLC_TEST_P 0xf3 |
127 | #define LLC_FRMR 0x87 |
128 | #define LLC_FRMR_P 0x97 |
129 | #define LLC_DM 0x0f |
130 | #define LLC_DM_P 0x1f |
131 | #define LLC_XID 0xaf |
132 | #define LLC_XID_P 0xbf |
133 | #define LLC_SABME 0x6f |
134 | #define LLC_SABME_P 0x7f |
135 | |
136 | /* |
137 | * Supervisory LLC commands |
138 | */ |
139 | #define LLC_RR 0x01 |
140 | #define LLC_RNR 0x05 |
141 | #define LLC_REJ 0x09 |
142 | |
143 | /* |
144 | * Info format - dummy only |
145 | */ |
146 | #define LLC_INFO 0x00 |
147 | |
148 | /* |
149 | * ISO PDTR 10178 contains among others |
150 | */ |
151 | #define LLC_8021D_LSAP 0x42 |
152 | #define LLC_X25_LSAP 0x7e |
153 | #define LLC_SNAP_LSAP 0xaa |
154 | #define LLC_ISO_LSAP 0xfe |
155 | |
156 | /* |
157 | * LLC XID definitions from 802.2, as needed |
158 | */ |
159 | |
160 | #define LLC_XID_FORMAT_BASIC 0x81 |
161 | #define LLC_XID_BASIC_MINLEN (LLC_UFRAMELEN + 3) |
162 | |
163 | #define LLC_XID_CLASS_I 0x1 |
164 | #define LLC_XID_CLASS_II 0x3 |
165 | #define LLC_XID_CLASS_III 0x5 |
166 | #define LLC_XID_CLASS_IV 0x7 |
167 | |
168 | |
169 | #endif /* !_NET_IF_LLC_H_ */ |
170 | |