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164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
/* $NetBSD: if_llc.h,v 1.12 1999/11/19 20:41:19 thorpej Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_llc.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NET_IF_LLC_H_
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#define _NET_IF_LLC_H_
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/*
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* IEEE 802.2 Link Level Control headers, for use in conjunction with
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* 802.{3,4,5} media access control methods.
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*
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* Headers here do not use bit fields due to shortcommings in many
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* compilers.
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*/
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struct llc {
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u_int8_t llc_dsap;
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u_int8_t llc_ssap;
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union {
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struct {
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u_int8_t control;
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u_int8_t format_id;
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u_int8_t class;
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u_int8_t window_x2;
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} __packed type_u;
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struct {
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u_int8_t num_snd_x2;
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u_int8_t num_rcv_x2;
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} __packed type_i;
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struct {
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u_int8_t control;
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u_int8_t num_rcv_x2;
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} __packed type_s;
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struct {
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u_int8_t control;
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/*
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* We cannot put the following fields in a structure because
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* the structure rounding might cause padding.
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*/
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u_int8_t frmr_rej_pdu0;
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u_int8_t frmr_rej_pdu1;
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u_int8_t frmr_control;
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u_int8_t frmr_control_ext;
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u_int8_t frmr_cause;
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} __packed type_frmr;
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struct {
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u_int8_t control;
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u_int8_t org_code[3];
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u_int16_t ether_type;
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} __packed type_snap;
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struct {
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u_int8_t control;
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u_int8_t control_ext;
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} __packed type_raw;
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} __packed llc_un;
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} __packed;
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struct frmrinfo {
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u_int8_t frmr_rej_pdu0;
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u_int8_t frmr_rej_pdu1;
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u_int8_t frmr_control;
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u_int8_t frmr_control_ext;
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u_int8_t frmr_cause;
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} __packed;
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#define llc_control llc_un.type_u.control
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#define llc_control_ext llc_un.type_raw.control_ext
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#define llc_fid llc_un.type_u.format_id
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#define llc_class llc_un.type_u.class
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#define llc_window llc_un.type_u.window_x2
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#define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0
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#define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0
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#define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1
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#define llc_frmr_control llc_un.type_frmr.frmr_control
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#define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext
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#define llc_frmr_cause llc_un.type_frmr.frmr_cause
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#define llc_snap llc_un.type_snap
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/*
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* Don't use sizeof(struct llc_un) for LLC header sizes
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*/
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#define LLC_ISFRAMELEN 4
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#define LLC_UFRAMELEN 3
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#define LLC_FRMRLEN 7
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#define LLC_SNAPFRAMELEN 8
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#ifdef CTASSERT
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CTASSERT(sizeof (struct llc) == LLC_SNAPFRAMELEN);
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#endif
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/*
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* Unnumbered LLC format commands
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*/
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#define LLC_UI 0x3
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#define LLC_UI_P 0x13
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#define LLC_DISC 0x43
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#define LLC_DISC_P 0x53
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#define LLC_UA 0x63
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#define LLC_UA_P 0x73
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#define LLC_TEST 0xe3
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#define LLC_TEST_P 0xf3
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#define LLC_FRMR 0x87
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#define LLC_FRMR_P 0x97
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#define LLC_DM 0x0f
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#define LLC_DM_P 0x1f
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#define LLC_XID 0xaf
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#define LLC_XID_P 0xbf
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#define LLC_SABME 0x6f
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#define LLC_SABME_P 0x7f
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/*
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* Supervisory LLC commands
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*/
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#define LLC_RR 0x01
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#define LLC_RNR 0x05
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#define LLC_REJ 0x09
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/*
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* Info format - dummy only
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*/
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#define LLC_INFO 0x00
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/*
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* ISO PDTR 10178 contains among others
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*/
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#define LLC_8021D_LSAP 0x42
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#define LLC_X25_LSAP 0x7e
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#define LLC_SNAP_LSAP 0xaa
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#define LLC_ISO_LSAP 0xfe
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#endif /* _NET_IF_LLC_H_ */
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