Annotation of sys/net/if_llc.h, Revision 1.1.1.1
1.1 nbrk 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_ */
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