if_llc.h revision 1817
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 * $Id$ 35 */ 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 45struct llc { 46 u_char llc_dsap; 47 u_char llc_ssap; 48 union { 49 struct { 50 u_char control; 51 u_char format_id; 52 u_char class; 53 u_char window_x2; 54 } type_u; 55 struct { 56 u_char num_snd_x2; 57 u_char num_rcv_x2; 58 } type_i; 59 struct { 60 u_char control; 61 u_char num_rcv_x2; 62 } type_s; 63 struct { 64 u_char control; 65 struct frmrinfo { 66 u_char rej_pdu_0; 67 u_char rej_pdu_1; 68 u_char frmr_control; 69 u_char frmr_control_ext; 70 u_char frmr_cause; 71 } frmrinfo; 72 } type_frmr; 73 struct { 74 u_char control; 75 u_char org_code[3]; 76 u_short ether_type; 77 } type_snap; 78 struct { 79 u_char control; 80 u_char control_ext; 81 } type_raw; 82 } llc_un; 83}; 84#define llc_control llc_un.type_u.control 85#define llc_control_ext llc_un.type_raw.control_ext 86#define llc_fid llc_un.type_u.format_id 87#define llc_class llc_un.type_u.class 88#define llc_window llc_un.type_u.window_x2 89#define llc_frmrinfo llc_un.type_frmr.frmrinfo 90#define llc_frmr_pdu0 llc_un.type_frmr.frmrinfo.rej_pdu0 91#define llc_frmr_pdu1 llc_un.type_frmr.frmrinfo.rej_pdu1 92#define llc_frmr_control llc_un.type_frmr.frmrinfo.frmr_control 93#define llc_frmr_control_ext llc_un.type_frmr.frmrinfo.frmr_control_ext 94#define llc_frmr_cause llc_un.type_frmr.frmrinfo.frmr_control_ext 95 96/* 97 * Don't use sizeof(struct llc_un) for LLC header sizes 98 */ 99#define LLC_ISFRAMELEN 4 100#define LLC_UFRAMELEN 3 101#define LLC_FRMRLEN 7 102 103/* 104 * Unnumbered LLC format commands 105 */ 106#define LLC_UI 0x3 107#define LLC_UI_P 0x13 108#define LLC_DISC 0x43 109#define LLC_DISC_P 0x53 110#define LLC_UA 0x63 111#define LLC_UA_P 0x73 112#define LLC_TEST 0xe3 113#define LLC_TEST_P 0xf3 114#define LLC_FRMR 0x87 115#define LLC_FRMR_P 0x97 116#define LLC_DM 0x0f 117#define LLC_DM_P 0x1f 118#define LLC_XID 0xaf 119#define LLC_XID_P 0xbf 120#define LLC_SABME 0x6f 121#define LLC_SABME_P 0x7f 122 123/* 124 * Supervisory LLC commands 125 */ 126#define LLC_RR 0x01 127#define LLC_RNR 0x05 128#define LLC_REJ 0x09 129 130/* 131 * Info format - dummy only 132 */ 133#define LLC_INFO 0x00 134 135/* 136 * ISO PDTR 10178 contains among others 137 */ 138#define LLC_X25_LSAP 0x7e 139#define LLC_SNAP_LSAP 0xaa 140#define LLC_ISO_LSAP 0xfe 141 142 143 144 145 146 147