1 /* $NetBSD: if_llc.h,v 1.12 1999/11/19 20:41:19 thorpej Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
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33 * @(#)if_llc.h 8.1 (Berkeley) 6/10/93
37 #ifndef _NET_IF_LLC_H_
38 #define _NET_IF_LLC_H_
41 * IEEE 802.2 Link Level Control headers, for use in conjunction with
42 * 802.{3,4,5} media access control methods.
44 * Headers here do not use bit fields due to shortcommings in many
69 * We cannot put the following fields in a structure because
70 * the structure rounding might cause padding.
72 u_int8_t frmr_rej_pdu0;
73 u_int8_t frmr_rej_pdu1;
74 u_int8_t frmr_control;
75 u_int8_t frmr_control_ext;
91 u_int8_t frmr_rej_pdu0;
92 u_int8_t frmr_rej_pdu1;
93 u_int8_t frmr_control;
94 u_int8_t frmr_control_ext;
98 #define llc_control llc_un.type_u.control
99 #define llc_control_ext llc_un.type_raw.control_ext
100 #define llc_fid llc_un.type_u.format_id
101 #define llc_class llc_un.type_u.class
102 #define llc_window llc_un.type_u.window_x2
103 #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0
104 #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0
105 #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1
106 #define llc_frmr_control llc_un.type_frmr.frmr_control
107 #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext
108 #define llc_frmr_cause llc_un.type_frmr.frmr_cause
109 #define llc_snap llc_un.type_snap
112 * Don't use sizeof(struct llc_un) for LLC header sizes
114 #define LLC_ISFRAMELEN 4
115 #define LLC_UFRAMELEN 3
116 #define LLC_FRMRLEN 7
117 #define LLC_SNAPFRAMELEN 8
120 CTASSERT(sizeof (struct llc) == LLC_SNAPFRAMELEN);
124 * Unnumbered LLC format commands
127 #define LLC_UI_P 0x13
128 #define LLC_DISC 0x43
129 #define LLC_DISC_P 0x53
131 #define LLC_UA_P 0x73
132 #define LLC_TEST 0xe3
133 #define LLC_TEST_P 0xf3
134 #define LLC_FRMR 0x87
135 #define LLC_FRMR_P 0x97
137 #define LLC_DM_P 0x1f
139 #define LLC_XID_P 0xbf
140 #define LLC_SABME 0x6f
141 #define LLC_SABME_P 0x7f
144 * Supervisory LLC commands
151 * Info format - dummy only
153 #define LLC_INFO 0x00
156 * ISO PDTR 10178 contains among others
158 #define LLC_8021D_LSAP 0x42
159 #define LLC_X25_LSAP 0x7e
160 #define LLC_SNAP_LSAP 0xaa
161 #define LLC_ISO_LSAP 0xfe
163 #endif /* _NET_IF_LLC_H_ */