1 /* $NetBSD: if_llc.h,v 1.12 1999/11/19 20:41:19 thorpej 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 * $FreeBSD$ 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 } __packed type_u; 56 struct { 57 u_int8_t num_snd_x2; 58 u_int8_t num_rcv_x2; 59 } __packed type_i; 60 struct { 61 u_int8_t control; 62 u_int8_t num_rcv_x2; 63 } __packed type_s; 64 struct { 65 u_int8_t control; 66 /* 67 * We cannot put the following fields in a structure because 68 * the structure rounding might cause padding. 69 */ 70 u_int8_t frmr_rej_pdu0; 71 u_int8_t frmr_rej_pdu1; 72 u_int8_t frmr_control; 73 u_int8_t frmr_control_ext; 74 u_int8_t frmr_cause; 75 } __packed type_frmr; 76 struct { 77 u_int8_t control; 78 u_int8_t org_code[3]; 79 u_int16_t ether_type; 80 } __packed type_snap; 81 struct { 82 u_int8_t control; 83 u_int8_t control_ext; 84 } __packed type_raw; 85 } __packed llc_un; 86 } __packed; 87 88 struct frmrinfo { 89 u_int8_t frmr_rej_pdu0; 90 u_int8_t frmr_rej_pdu1; 91 u_int8_t frmr_control; 92 u_int8_t frmr_control_ext; 93 u_int8_t frmr_cause; 94 } __packed; 95 96 #define llc_control llc_un.type_u.control 97 #define llc_control_ext llc_un.type_raw.control_ext 98 #define llc_fid llc_un.type_u.format_id 99 #define llc_class llc_un.type_u.class 100 #define llc_window llc_un.type_u.window_x2 101 #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0 102 #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0 103 #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1 104 #define llc_frmr_control llc_un.type_frmr.frmr_control 105 #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext 106 #define llc_frmr_cause llc_un.type_frmr.frmr_cause 107 #define llc_snap llc_un.type_snap 108 109 /* 110 * Don't use sizeof(struct llc_un) for LLC header sizes 111 */ 112 #define LLC_ISFRAMELEN 4 113 #define LLC_UFRAMELEN 3 114 #define LLC_FRMRLEN 7 115 #define LLC_SNAPFRAMELEN 8 116 117 #ifdef CTASSERT 118 CTASSERT(sizeof (struct llc) == LLC_SNAPFRAMELEN); 119 #endif 120 121 /* 122 * Unnumbered LLC format commands 123 */ 124 #define LLC_UI 0x3 125 #define LLC_UI_P 0x13 126 #define LLC_DISC 0x43 127 #define LLC_DISC_P 0x53 128 #define LLC_UA 0x63 129 #define LLC_UA_P 0x73 130 #define LLC_TEST 0xe3 131 #define LLC_TEST_P 0xf3 132 #define LLC_FRMR 0x87 133 #define LLC_FRMR_P 0x97 134 #define LLC_DM 0x0f 135 #define LLC_DM_P 0x1f 136 #define LLC_XID 0xaf 137 #define LLC_XID_P 0xbf 138 #define LLC_SABME 0x6f 139 #define LLC_SABME_P 0x7f 140 141 /* 142 * Supervisory LLC commands 143 */ 144 #define LLC_RR 0x01 145 #define LLC_RNR 0x05 146 #define LLC_REJ 0x09 147 148 /* 149 * Info format - dummy only 150 */ 151 #define LLC_INFO 0x00 152 153 /* 154 * ISO PDTR 10178 contains among others 155 */ 156 #define LLC_8021D_LSAP 0x42 157 #define LLC_X25_LSAP 0x7e 158 #define LLC_SNAP_LSAP 0xaa 159 #define LLC_ISO_LSAP 0xfe 160 161 #endif /* _NET_IF_LLC_H_ */ 162