Watt-32 tcp/ip  2.2 dev-rel.10
if_llc.h
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1 
5 /* $NetBSD: if_llc.h,v 1.9 1997/05/02 21:08:54 christos Exp $ */
6 
7 /*
8  * Copyright (c) 1988, 1993
9  * The Regents of the University of California. All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  * notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in the
18  * documentation and/or other materials provided with the distribution.
19  * 3. All advertising materials mentioning features or use of this software
20  * must display the following acknowledgement:
21  * This product includes software developed by the University of
22  * California, Berkeley and its contributors.
23  * 4. Neither the name of the University nor the names of its contributors
24  * may be used to endorse or promote products derived from this software
25  * without specific prior written permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37  * SUCH DAMAGE.
38  *
39  * @(#)if_llc.h 8.1 (Berkeley) 6/10/93
40  */
41 #ifndef __NET_IF_LLC_H
42 #define __NET_IF_LLC_H
43 
44 /*
45  * IEEE 802.2 Link Level Control headers, for use in conjunction with
46  * 802.{3,4,5} media access control methods.
47  *
48  * Headers here do not use bit fields due to shortcommings in many
49  * compilers.
50  */
51 
52 #include <sys/pack_on.h>
53 
54 struct llc {
55  u_int8_t llc_dsap;
56  u_int8_t llc_ssap;
57  union {
58  struct {
59  u_int8_t control;
60  u_int8_t format_id;
61  u_int8_t class;
62  u_int8_t window_x2;
63  } type_u;
64  struct {
65  u_int8_t num_snd_x2;
66  u_int8_t num_rcv_x2;
67  } type_i;
68  struct {
69  u_int8_t control;
70  u_int8_t num_rcv_x2;
71  } type_s;
72  struct {
73  u_int8_t control;
74  /*
75  * We cannot put the following fields in a structure because
76  * the structure rounding might cause padding.
77  */
78  u_int8_t frmr_rej_pdu0;
79  u_int8_t frmr_rej_pdu1;
80  u_int8_t frmr_control;
81  u_int8_t frmr_control_ext;
82  u_int8_t frmr_cause;
83  } type_frmr;
84  struct {
85  u_int8_t control;
86  u_int8_t org_code[3];
87  u_int16_t ether_type;
88  } type_snap;
89  struct {
90  u_int8_t control;
91  u_int8_t control_ext;
92  } type_raw;
93  } llc_un;
94 };
95 
96 struct frmrinfo {
97  u_int8_t frmr_rej_pdu0;
98  u_int8_t frmr_rej_pdu1;
99  u_int8_t frmr_control;
100  u_int8_t frmr_control_ext;
101  u_int8_t frmr_cause;
102 };
103 
104 #include <sys/pack_off.h>
105 
106 #define llc_control llc_un.type_u.control
107 #define llc_control_ext llc_un.type_raw.control_ext
108 #define llc_fid llc_un.type_u.format_id
109 #define llc_class llc_un.type_u.class
110 #define llc_window llc_un.type_u.window_x2
111 #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0
112 #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0
113 #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1
114 #define llc_frmr_control llc_un.type_frmr.frmr_control
115 #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext
116 #define llc_frmr_cause llc_un.type_frmr.frmr_cause
117 
118 /*
119  * Don't use sizeof(struct llc_un) for LLC header sizes
120  */
121 #define LLC_ISFRAMELEN 4
122 #define LLC_UFRAMELEN 3
123 #define LLC_FRMRLEN 7
124 
125 /*
126  * Unnumbered LLC format commands
127  */
128 #define LLC_UI 0x3
129 #define LLC_UI_P 0x13
130 #define LLC_DISC 0x43
131 #define LLC_DISC_P 0x53
132 #define LLC_UA 0x63
133 #define LLC_UA_P 0x73
134 #define LLC_TEST 0xe3
135 #define LLC_TEST_P 0xf3
136 #define LLC_FRMR 0x87
137 #define LLC_FRMR_P 0x97
138 #define LLC_DM 0x0f
139 #define LLC_DM_P 0x1f
140 #define LLC_XID 0xaf
141 #define LLC_XID_P 0xbf
142 #define LLC_SABME 0x6f
143 #define LLC_SABME_P 0x7f
144 
145 /*
146  * Supervisory LLC commands
147  */
148 #define LLC_RR 0x01
149 #define LLC_RNR 0x05
150 #define LLC_REJ 0x09
151 
152 /*
153  * Info format - dummy only
154  */
155 #define LLC_INFO 0x00
156 
157 /*
158  * ISO PDTR 10178 contains among others
159  */
160 #define LLC_X25_LSAP 0x7e
161 #define LLC_SNAP_LSAP 0xaa
162 #define LLC_ISO_LSAP 0xfe
163 
164 #endif
Definition: if_llc.h:54