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Annotation of kernel/bsd/net/if_llc.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            26: /*
        !            27:  * Copyright (c) 1988, 1993
        !            28:  *     The Regents of the University of California.  All rights reserved.
        !            29:  *
        !            30:  * Redistribution and use in source and binary forms, with or without
        !            31:  * modification, are permitted provided that the following conditions
        !            32:  * are met:
        !            33:  * 1. Redistributions of source code must retain the above copyright
        !            34:  *    notice, this list of conditions and the following disclaimer.
        !            35:  * 2. Redistributions in binary form must reproduce the above copyright
        !            36:  *    notice, this list of conditions and the following disclaimer in the
        !            37:  *    documentation and/or other materials provided with the distribution.
        !            38:  * 3. All advertising materials mentioning features or use of this software
        !            39:  *    must display the following acknowledgement:
        !            40:  *     This product includes software developed by the University of
        !            41:  *     California, Berkeley and its contributors.
        !            42:  * 4. Neither the name of the University nor the names of its contributors
        !            43:  *    may be used to endorse or promote products derived from this software
        !            44:  *    without specific prior written permission.
        !            45:  *
        !            46:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            47:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            48:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            49:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            50:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            51:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            52:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            53:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            54:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            55:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            56:  * SUCH DAMAGE.
        !            57:  *
        !            58:  *      @(#)if_llc.h   8.1 (Berkeley) 6/10/93
        !            59:  */
        !            60: 
        !            61: /*
        !            62:  * IEEE 802.2 Link Level Control headers, for use in conjunction with
        !            63:  * 802.{3,4,5} media access control methods.
        !            64:  *
        !            65:  * Headers here do not use bit fields due to shortcommings in many
        !            66:  * compilers.
        !            67:  */
        !            68: 
        !            69: struct llc {
        !            70:        u_int8_t llc_dsap;
        !            71:        u_int8_t llc_ssap;
        !            72:        union {
        !            73:            struct {
        !            74:                u_int8_t control;
        !            75:                u_int8_t format_id;
        !            76:                u_int8_t class;
        !            77:                u_int8_t window_x2;
        !            78:            } type_u;
        !            79:            struct {
        !            80:                u_int8_t num_snd_x2;
        !            81:                u_int8_t num_rcv_x2;
        !            82:            } type_i;
        !            83:            struct {
        !            84:                u_int8_t control;
        !            85:                u_int8_t num_rcv_x2;
        !            86:            } type_s;
        !            87:            struct {
        !            88:                u_int8_t control;
        !            89:                struct frmrinfo {
        !            90:                        u_int8_t rej_pdu_0;
        !            91:                        u_int8_t rej_pdu_1;
        !            92:                        u_int8_t frmr_control;
        !            93:                        u_int8_t frmr_control_ext;
        !            94:                        u_int8_t frmr_cause;
        !            95:                } frmrinfo;
        !            96:            } type_frmr;
        !            97:            struct {
        !            98:                u_int8_t  control;
        !            99:                u_int8_t  org_code[3];
        !           100:                u_int16_t ether_type;
        !           101:            } type_snap;
        !           102:            struct {
        !           103:                u_int8_t control;
        !           104:                u_int8_t control_ext;
        !           105:            } type_raw;
        !           106:        } llc_un;
        !           107: };
        !           108: #define llc_control            llc_un.type_u.control
        !           109: #define        llc_control_ext        llc_un.type_raw.control_ext
        !           110: #define llc_fid                llc_un.type_u.format_id
        !           111: #define llc_class              llc_un.type_u.class
        !           112: #define llc_window             llc_un.type_u.window_x2
        !           113: #define llc_frmrinfo           llc_un.type_frmr.frmrinfo
        !           114: #define llc_frmr_pdu0          llc_un.type_frmr.frmrinfo.rej_pdu0
        !           115: #define llc_frmr_pdu1          llc_un.type_frmr.frmrinfo.rej_pdu1
        !           116: #define llc_frmr_control       llc_un.type_frmr.frmrinfo.frmr_control
        !           117: #define llc_frmr_control_ext   llc_un.type_frmr.frmrinfo.frmr_control_ext
        !           118: #define llc_frmr_cause         llc_un.type_frmr.frmrinfo.frmr_control_ext
        !           119: 
        !           120: /*
        !           121:  * Don't use sizeof(struct llc_un) for LLC header sizes
        !           122:  */
        !           123: #define LLC_ISFRAMELEN 4
        !           124: #define LLC_UFRAMELEN  3
        !           125: #define LLC_FRMRLEN    7
        !           126: 
        !           127: /*
        !           128:  * Unnumbered LLC format commands
        !           129:  */
        !           130: #define LLC_UI         0x3
        !           131: #define LLC_UI_P       0x13
        !           132: #define LLC_DISC       0x43
        !           133: #define        LLC_DISC_P      0x53
        !           134: #define LLC_UA         0x63
        !           135: #define LLC_UA_P       0x73
        !           136: #define LLC_TEST       0xe3
        !           137: #define LLC_TEST_P     0xf3
        !           138: #define LLC_FRMR       0x87
        !           139: #define        LLC_FRMR_P      0x97
        !           140: #define LLC_DM         0x0f
        !           141: #define        LLC_DM_P        0x1f
        !           142: #define LLC_XID                0xaf
        !           143: #define LLC_XID_P      0xbf
        !           144: #define LLC_SABME      0x6f
        !           145: #define LLC_SABME_P    0x7f
        !           146: 
        !           147: /*
        !           148:  * Supervisory LLC commands
        !           149:  */
        !           150: #define        LLC_RR          0x01
        !           151: #define        LLC_RNR         0x05
        !           152: #define        LLC_REJ         0x09
        !           153: 
        !           154: /*
        !           155:  * Info format - dummy only
        !           156:  */
        !           157: #define        LLC_INFO        0x00
        !           158: 
        !           159: /*
        !           160:  * ISO PDTR 10178 contains among others
        !           161:  */
        !           162: #define LLC_X25_LSAP   0x7e
        !           163: #define LLC_SNAP_LSAP  0xaa
        !           164: #define LLC_ISO_LSAP   0xfe

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