| 1 | /* $NetBSD: if_llc.h,v 1.21 2014/09/05 05:32:07 matt 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 | */ |
| 33 | |
| 34 | #ifndef _NET_IF_LLC_H_ |
| 35 | #define _NET_IF_LLC_H_ |
| 36 | |
| 37 | /* |
| 38 | * IEEE 802.2 Link Level Control headers, for use in conjunction with |
| 39 | * 802.{3,4,5} media access control methods. |
| 40 | * |
| 41 | * Headers here do not use bit fields due to shortcommings in many |
| 42 | * compilers. |
| 43 | */ |
| 44 | |
| 45 | struct llc { |
| 46 | uint8_t llc_dsap; |
| 47 | uint8_t llc_ssap; |
| 48 | union { |
| 49 | struct { |
| 50 | uint8_t control; |
| 51 | uint8_t format_id; |
| 52 | uint8_t class_u; |
| 53 | uint8_t window_x2; |
| 54 | } type_u /* XXX __packed ??? */; |
| 55 | struct { |
| 56 | uint8_t num_snd_x2; |
| 57 | uint8_t num_rcv_x2; |
| 58 | } type_i /* XXX __packed ??? */; |
| 59 | struct { |
| 60 | uint8_t control; |
| 61 | uint8_t num_rcv_x2; |
| 62 | } type_s /* XXX __packed ??? */; |
| 63 | struct { |
| 64 | uint8_t control; |
| 65 | /* |
| 66 | * We cannot put the following fields in a structure because |
| 67 | * the structure rounding might cause padding. |
| 68 | */ |
| 69 | uint8_t frmr_rej_pdu0; |
| 70 | uint8_t frmr_rej_pdu1; |
| 71 | uint8_t frmr_control; |
| 72 | uint8_t frmr_control_ext; |
| 73 | uint8_t frmr_cause; |
| 74 | } type_frmr /* XXX __packed ??? */; |
| 75 | struct { |
| 76 | uint8_t control; |
| 77 | uint8_t org_code[3]; |
| 78 | uint16_t ether_type; |
| 79 | } type_snap __packed; |
| 80 | struct { |
| 81 | uint8_t control; |
| 82 | uint8_t control_ext; |
| 83 | } type_raw /* XXX __packed ??? */; |
| 84 | } llc_un /* XXX __packed ??? */; |
| 85 | } __packed; |
| 86 | |
| 87 | struct frmrinfo { |
| 88 | uint8_t frmr_rej_pdu0; |
| 89 | uint8_t frmr_rej_pdu1; |
| 90 | uint8_t frmr_control; |
| 91 | uint8_t frmr_control_ext; |
| 92 | uint8_t frmr_cause; |
| 93 | } __packed; |
| 94 | |
| 95 | #define llc_control llc_un.type_u.control |
| 96 | #define llc_control_ext llc_un.type_raw.control_ext |
| 97 | #define llc_fid llc_un.type_u.format_id |
| 98 | #define llc_class llc_un.type_u.class_u |
| 99 | #define llc_window llc_un.type_u.window_x2 |
| 100 | #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0 |
| 101 | #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0 |
| 102 | #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1 |
| 103 | #define llc_frmr_control llc_un.type_frmr.frmr_control |
| 104 | #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext |
| 105 | #define llc_frmr_cause llc_un.type_frmr.frmr_cause |
| 106 | #define llc_snap llc_un.type_snap |
| 107 | |
| 108 | /* |
| 109 | * Don't use sizeof(struct llc_un) for LLC header sizes |
| 110 | */ |
| 111 | #define LLC_ISFRAMELEN 4 |
| 112 | #define LLC_UFRAMELEN 3 |
| 113 | #define LLC_FRMRLEN 7 |
| 114 | #define LLC_SNAPFRAMELEN 8 |
| 115 | |
| 116 | /* |
| 117 | * Unnumbered LLC format commands |
| 118 | */ |
| 119 | #define LLC_UI 0x3 |
| 120 | #define LLC_UI_P 0x13 |
| 121 | #define LLC_DISC 0x43 |
| 122 | #define LLC_DISC_P 0x53 |
| 123 | #define LLC_UA 0x63 |
| 124 | #define LLC_UA_P 0x73 |
| 125 | #define LLC_TEST 0xe3 |
| 126 | #define LLC_TEST_P 0xf3 |
| 127 | #define LLC_FRMR 0x87 |
| 128 | #define LLC_FRMR_P 0x97 |
| 129 | #define LLC_DM 0x0f |
| 130 | #define LLC_DM_P 0x1f |
| 131 | #define LLC_XID 0xaf |
| 132 | #define LLC_XID_P 0xbf |
| 133 | #define LLC_SABME 0x6f |
| 134 | #define LLC_SABME_P 0x7f |
| 135 | |
| 136 | /* |
| 137 | * Supervisory LLC commands |
| 138 | */ |
| 139 | #define LLC_RR 0x01 |
| 140 | #define LLC_RNR 0x05 |
| 141 | #define LLC_REJ 0x09 |
| 142 | |
| 143 | /* |
| 144 | * Info format - dummy only |
| 145 | */ |
| 146 | #define LLC_INFO 0x00 |
| 147 | |
| 148 | /* |
| 149 | * ISO PDTR 10178 contains among others |
| 150 | */ |
| 151 | #define LLC_8021D_LSAP 0x42 |
| 152 | #define LLC_X25_LSAP 0x7e |
| 153 | #define LLC_SNAP_LSAP 0xaa |
| 154 | #define LLC_ISO_LSAP 0xfe |
| 155 | |
| 156 | /* |
| 157 | * LLC XID definitions from 802.2, as needed |
| 158 | */ |
| 159 | |
| 160 | #define LLC_XID_FORMAT_BASIC 0x81 |
| 161 | #define LLC_XID_BASIC_MINLEN (LLC_UFRAMELEN + 3) |
| 162 | |
| 163 | #define LLC_XID_CLASS_I 0x1 |
| 164 | #define LLC_XID_CLASS_II 0x3 |
| 165 | #define LLC_XID_CLASS_III 0x5 |
| 166 | #define LLC_XID_CLASS_IV 0x7 |
| 167 | |
| 168 | |
| 169 | #endif /* !_NET_IF_LLC_H_ */ |
| 170 | |