if_llc.h revision 1541
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 */ 35 36/* 37 * IEEE 802.2 Link Level Control headers, for use in conjunction with 38 * 802.{3,4,5} media access control methods. 39 * 40 * Headers here do not use bit fields due to shortcommings in many 41 * compilers. 42 */ 43 44struct llc { 45 u_char llc_dsap; 46 u_char llc_ssap; 47 union { 48 struct { 49 u_char control; 50 u_char format_id; 51 u_char class; 52 u_char window_x2; 53 } type_u; 54 struct { 55 u_char num_snd_x2; 56 u_char num_rcv_x2; 57 } type_i; 58 struct { 59 u_char control; 60 u_char num_rcv_x2; 61 } type_s; 62 struct { 63 u_char control; 64 struct frmrinfo { 65 u_char rej_pdu_0; 66 u_char rej_pdu_1; 67 u_char frmr_control; 68 u_char frmr_control_ext; 69 u_char frmr_cause; 70 } frmrinfo; 71 } type_frmr; 72 struct { 73 u_char control; 74 u_char org_code[3]; 75 u_short ether_type; 76 } type_snap; 77 struct { 78 u_char control; 79 u_char control_ext; 80 } type_raw; 81 } llc_un; 82}; 83#define llc_control llc_un.type_u.control 84#define llc_control_ext llc_un.type_raw.control_ext 85#define llc_fid llc_un.type_u.format_id 86#define llc_class llc_un.type_u.class 87#define llc_window llc_un.type_u.window_x2 88#define llc_frmrinfo llc_un.type_frmr.frmrinfo 89#define llc_frmr_pdu0 llc_un.type_frmr.frmrinfo.rej_pdu0 90#define llc_frmr_pdu1 llc_un.type_frmr.frmrinfo.rej_pdu1 91#define llc_frmr_control llc_un.type_frmr.frmrinfo.frmr_control 92#define llc_frmr_control_ext llc_un.type_frmr.frmrinfo.frmr_control_ext 93#define llc_frmr_cause llc_un.type_frmr.frmrinfo.frmr_control_ext 94 95/* 96 * Don't use sizeof(struct llc_un) for LLC header sizes 97 */ 98#define LLC_ISFRAMELEN 4 99#define LLC_UFRAMELEN 3 100#define LLC_FRMRLEN 7 101 102/* 103 * Unnumbered LLC format commands 104 */ 105#define LLC_UI 0x3 106#define LLC_UI_P 0x13 107#define LLC_DISC 0x43 108#define LLC_DISC_P 0x53 109#define LLC_UA 0x63 110#define LLC_UA_P 0x73 111#define LLC_TEST 0xe3 112#define LLC_TEST_P 0xf3 113#define LLC_FRMR 0x87 114#define LLC_FRMR_P 0x97 115#define LLC_DM 0x0f 116#define LLC_DM_P 0x1f 117#define LLC_XID 0xaf 118#define LLC_XID_P 0xbf 119#define LLC_SABME 0x6f 120#define LLC_SABME_P 0x7f 121 122/* 123 * Supervisory LLC commands 124 */ 125#define LLC_RR 0x01 126#define LLC_RNR 0x05 127#define LLC_REJ 0x09 128 129/* 130 * Info format - dummy only 131 */ 132#define LLC_INFO 0x00 133 134/* 135 * ISO PDTR 10178 contains among others 136 */ 137#define LLC_X25_LSAP 0x7e 138#define LLC_SNAP_LSAP 0xaa 139#define LLC_ISO_LSAP 0xfe 140 141 142 143 144 145 146