1 /* $NetBSD: if_llc.h,v 1.13 2001/04/10 19:30:41 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)if_llc.h 8.1 (Berkeley) 6/10/93 36 */ 37 38 #ifndef _NET_IF_LLC_H_ 39 #define _NET_IF_LLC_H_ 40 41 /* 42 * IEEE 802.2 Link Level Control headers, for use in conjunction with 43 * 802.{3,4,5} media access control methods. 44 * 45 * Headers here do not use bit fields due to shortcommings in many 46 * compilers. 47 */ 48 49 struct llc { 50 u_int8_t llc_dsap; 51 u_int8_t llc_ssap; 52 union { 53 struct { 54 u_int8_t control; 55 u_int8_t format_id; 56 u_int8_t class; 57 u_int8_t window_x2; 58 } type_u __attribute__((__packed__)); 59 struct { 60 u_int8_t num_snd_x2; 61 u_int8_t num_rcv_x2; 62 } type_i __attribute__((__packed__)); 63 struct { 64 u_int8_t control; 65 u_int8_t num_rcv_x2; 66 } type_s __attribute__((__packed__)); 67 struct { 68 u_int8_t control; 69 /* 70 * We cannot put the following fields in a structure because 71 * the structure rounding might cause padding. 72 */ 73 u_int8_t frmr_rej_pdu0; 74 u_int8_t frmr_rej_pdu1; 75 u_int8_t frmr_control; 76 u_int8_t frmr_control_ext; 77 u_int8_t frmr_cause; 78 } type_frmr __attribute__((__packed__)); 79 struct { 80 u_int8_t control; 81 u_int8_t org_code[3]; 82 u_int16_t ether_type; 83 } type_snap __attribute__((__packed__)); 84 struct { 85 u_int8_t control; 86 u_int8_t control_ext; 87 } type_raw __attribute__((__packed__)); 88 } llc_un /* XXX __attribute__((__packed__)) ??? */; 89 } __attribute__((__packed__)); 90 91 struct frmrinfo { 92 u_int8_t frmr_rej_pdu0; 93 u_int8_t frmr_rej_pdu1; 94 u_int8_t frmr_control; 95 u_int8_t frmr_control_ext; 96 u_int8_t frmr_cause; 97 } __attribute__((__packed__)); 98 99 #define llc_control llc_un.type_u.control 100 #define llc_control_ext llc_un.type_raw.control_ext 101 #define llc_fid llc_un.type_u.format_id 102 #define llc_class llc_un.type_u.class 103 #define llc_window llc_un.type_u.window_x2 104 #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0 105 #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0 106 #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1 107 #define llc_frmr_control llc_un.type_frmr.frmr_control 108 #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext 109 #define llc_frmr_cause llc_un.type_frmr.frmr_cause 110 #define llc_snap llc_un.type_snap 111 112 /* 113 * Don't use sizeof(struct llc_un) for LLC header sizes 114 */ 115 #define LLC_ISFRAMELEN 4 116 #define LLC_UFRAMELEN 3 117 #define LLC_FRMRLEN 7 118 #define LLC_SNAPFRAMELEN 8 119 120 /* 121 * Unnumbered LLC format commands 122 */ 123 #define LLC_UI 0x3 124 #define LLC_UI_P 0x13 125 #define LLC_DISC 0x43 126 #define LLC_DISC_P 0x53 127 #define LLC_UA 0x63 128 #define LLC_UA_P 0x73 129 #define LLC_TEST 0xe3 130 #define LLC_TEST_P 0xf3 131 #define LLC_FRMR 0x87 132 #define LLC_FRMR_P 0x97 133 #define LLC_DM 0x0f 134 #define LLC_DM_P 0x1f 135 #define LLC_XID 0xaf 136 #define LLC_XID_P 0xbf 137 #define LLC_SABME 0x6f 138 #define LLC_SABME_P 0x7f 139 140 /* 141 * Supervisory LLC commands 142 */ 143 #define LLC_RR 0x01 144 #define LLC_RNR 0x05 145 #define LLC_REJ 0x09 146 147 /* 148 * Info format - dummy only 149 */ 150 #define LLC_INFO 0x00 151 152 /* 153 * ISO PDTR 10178 contains among others 154 */ 155 #define LLC_8021D_LSAP 0x42 156 #define LLC_X25_LSAP 0x7e 157 #define LLC_SNAP_LSAP 0xaa 158 #define LLC_ISO_LSAP 0xfe 159 160 #endif /* _NET_IF_LLC_H_ */ 161