1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)if_llc.h 8.1 (Berkeley) 6/10/93 34 * $FreeBSD: src/sys/net/if_llc.h,v 1.7 1999/08/28 00:48:18 peter Exp $ 35 * $DragonFly: src/sys/net/if_llc.h,v 1.3 2004/07/20 14:43:34 joerg Exp $ 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 shortcomings in many 46 * compilers. 47 */ 48 49 struct llc { 50 u_char llc_dsap; 51 u_char llc_ssap; 52 union { 53 struct { 54 u_char control; 55 u_char format_id; 56 u_char class; 57 u_char window_x2; 58 } type_u; 59 struct { 60 u_char num_snd_x2; 61 u_char num_rcv_x2; 62 } type_i; 63 struct { 64 u_char control; 65 u_char num_rcv_x2; 66 } type_s; 67 struct { 68 u_char control; 69 struct frmrinfo { 70 u_char rej_pdu_0; 71 u_char rej_pdu_1; 72 u_char frmr_control; 73 u_char frmr_control_ext; 74 u_char frmr_cause; 75 } frmrinfo; 76 } type_frmr; 77 struct { 78 u_char control; 79 u_char org_code[3]; 80 u_short ether_type; 81 } type_snap; 82 struct { 83 u_char control; 84 u_char control_ext; 85 } type_raw; 86 } llc_un; 87 }; 88 #define llc_control llc_un.type_u.control 89 #define llc_control_ext llc_un.type_raw.control_ext 90 #define llc_fid llc_un.type_u.format_id 91 #define llc_class llc_un.type_u.class 92 #define llc_window llc_un.type_u.window_x2 93 #define llc_frmrinfo llc_un.type_frmr.frmrinfo 94 #define llc_frmr_pdu0 llc_un.type_frmr.frmrinfo.rej_pdu0 95 #define llc_frmr_pdu1 llc_un.type_frmr.frmrinfo.rej_pdu1 96 #define llc_frmr_control llc_un.type_frmr.frmrinfo.frmr_control 97 #define llc_frmr_control_ext llc_un.type_frmr.frmrinfo.frmr_control_ext 98 #define llc_frmr_cause llc_un.type_frmr.frmrinfo.frmr_control_ext 99 #define llc_snap llc_un.type_snap 100 101 /* 102 * Don't use sizeof(struct llc_un) for LLC header sizes 103 */ 104 #define LLC_ISFRAMELEN 4 105 #define LLC_UFRAMELEN 3 106 #define LLC_FRMRLEN 7 107 108 /* 109 * Unnumbered LLC format commands 110 */ 111 #define LLC_UI 0x3 112 #define LLC_UI_P 0x13 113 #define LLC_DISC 0x43 114 #define LLC_DISC_P 0x53 115 #define LLC_UA 0x63 116 #define LLC_UA_P 0x73 117 #define LLC_TEST 0xe3 118 #define LLC_TEST_P 0xf3 119 #define LLC_FRMR 0x87 120 #define LLC_FRMR_P 0x97 121 #define LLC_DM 0x0f 122 #define LLC_DM_P 0x1f 123 #define LLC_XID 0xaf 124 #define LLC_XID_P 0xbf 125 #define LLC_SABME 0x6f 126 #define LLC_SABME_P 0x7f 127 128 /* 129 * Supervisory LLC commands 130 */ 131 #define LLC_RR 0x01 132 #define LLC_RNR 0x05 133 #define LLC_REJ 0x09 134 135 /* 136 * Info format - dummy only 137 */ 138 #define LLC_INFO 0x00 139 140 /* 141 * ISO PDTR 10178 contains among others 142 */ 143 #define LLC_X25_LSAP 0x7e 144 #define LLC_SNAP_LSAP 0xaa 145 #define LLC_ISO_LSAP 0xfe 146 147 #endif 148