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Annotation of kernel/bsd/netccitt/pk.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: /*
        !            26:  * Copyright (c) University of British Columbia, 1984
        !            27:  * Copyright (c) 1990, 1992, 1993
        !            28:  *     The Regents of the University of California.  All rights reserved.
        !            29:  *
        !            30:  * This code is derived from software contributed to Berkeley by
        !            31:  * the Laboratory for Computation Vision and the Computer Science Department
        !            32:  * of the University of British Columbia.
        !            33:  *
        !            34:  * Redistribution and use in source and binary forms, with or without
        !            35:  * modification, are permitted provided that the following conditions
        !            36:  * are met:
        !            37:  * 1. Redistributions of source code must retain the above copyright
        !            38:  *    notice, this list of conditions and the following disclaimer.
        !            39:  * 2. Redistributions in binary form must reproduce the above copyright
        !            40:  *    notice, this list of conditions and the following disclaimer in the
        !            41:  *    documentation and/or other materials provided with the distribution.
        !            42:  * 3. All advertising materials mentioning features or use of this software
        !            43:  *    must display the following acknowledgement:
        !            44:  *     This product includes software developed by the University of
        !            45:  *     California, Berkeley and its contributors.
        !            46:  * 4. Neither the name of the University nor the names of its contributors
        !            47:  *    may be used to endorse or promote products derived from this software
        !            48:  *    without specific prior written permission.
        !            49:  *
        !            50:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            51:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            52:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            53:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            54:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            55:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            56:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            57:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            58:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            59:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            60:  * SUCH DAMAGE.
        !            61:  *
        !            62:  *     @(#)pk.h        8.1 (Berkeley) 6/10/93
        !            63:  */
        !            64: 
        !            65: /*
        !            66:  *
        !            67:  *  X.25 Packet Level Definitions:
        !            68:  *
        !            69:  */
        !            70: 
        !            71: /* Packet type identifier field defintions. */
        !            72: 
        !            73: #define X25_CALL                         11
        !            74: #define X25_CALL_ACCEPTED                15   
        !            75: #define X25_CLEAR                        19
        !            76: #define X25_CLEAR_CONFIRM                23  
        !            77: #define X25_DATA                          0   
        !            78: #define X25_INTERRUPT                    35   
        !            79: #define X25_INTERRUPT_CONFIRM            39   
        !            80: 
        !            81: #define X25_RR                            1   
        !            82: #define X25_RNR                           5   
        !            83: #define X25_REJECT                       9
        !            84: #define X25_RESET                        27 
        !            85: #define X25_RESET_CONFIRM                31   
        !            86: #define X25_DIAGNOSTIC                 241
        !            87: 
        !            88: #define X25_RESTART                     251     
        !            89: #define X25_RESTART_CONFIRM            255 
        !            90: 
        !            91: /* Restart cause field definitions. */
        !            92: 
        !            93: #define X25_RESTART_DTE_ORIGINATED       0
        !            94: #define X25_RESTART_LOCAL_PROCEDURE_ERROR 1
        !            95: #define X25_RESTART_NETWORK_CONGESTION   3
        !            96: #define X25_RESTART_NETWORK_OPERATIONAL          7
        !            97: #define X25_RESTART_DTE_ORIGINATED2      128
        !            98: 
        !            99: 
        !           100: /* Miscellaneous definitions. */
        !           101: 
        !           102: #define DATA_PACKET_DESIGNATOR         0x01
        !           103: #define RR_OR_RNR_PACKET_DESIGNATOR    0x02
        !           104: #define RR_PACKET_DESIGNATOR           0x04
        !           105: 
        !           106: #define DEFAULT_WINDOW_SIZE            2
        !           107: #define MODULUS                                8
        !           108: 
        !           109: #define ADDRLN                         1
        !           110: #define MAXADDRLN                      15
        !           111: #define FACILITIESLN                   1
        !           112: #define MAXFACILITIESLN                        10
        !           113: #define MAXUSERDATA                    16
        !           114: #define MAXCALLINFOLN                  1+15+1+10+16
        !           115: 
        !           116: #define PACKET_OK                      0
        !           117: #define IGNORE_PACKET                  1
        !           118: #define ERROR_PACKET                   2
        !           119: 
        !           120: typedef char    bool;
        !           121: #define FALSE  0
        !           122: #define TRUE   1
        !           123: 
        !           124: /*
        !           125:  *  X.25 Packet format definitions
        !           126:  *  This will eventually have to be rewritten without reference
        !           127:  *  to bit fields, to be ansi C compliant and allignment safe.
        !           128:  */
        !           129: 
        !           130: typedef u_char octet;
        !           131: 
        !           132: struct x25_calladdr {
        !           133:        octet addrlens;
        !           134:        octet address_field[MAXADDRLN];
        !           135: };
        !           136: 
        !           137: struct x25_packet {
        !           138:        octet bits;
        !           139:        octet logical_channel_number;
        !           140:        octet packet_type;
        !           141:        octet packet_data;
        !           142: };
        !           143: #define packet_cause packet_data
        !           144: 
        !           145: struct data_packet {
        !           146:        octet bits;
        !           147: };
        !           148: 
        !           149: #define FACILITIES_REVERSE_CHARGE      0x1
        !           150: #define FACILITIES_THROUGHPUT          0x2
        !           151: #define FACILITIES_PACKETSIZE          0x42
        !           152: #define FACILITIES_WINDOWSIZE          0x43
        !           153: 
        !           154: #define PKHEADERLN     3
        !           155: 
        !           156: #define DP(xp)          (((struct data_packet *)&(xp) -> packet_type) -> bits)
        !           157: #define PS(xp)           X25GBITS(DP(xp), p_s)
        !           158: #define PR(xp)           X25GBITS(DP(xp), p_r)
        !           159: #define MBIT(xp)         X25GBITS(DP(xp), m_bit)
        !           160: #define SPR(xp, v)       X25SBITS(DP(xp), p_r, (v))
        !           161: #define SPS(xp, v)       X25SBITS(DP(xp), p_s, (v))
        !           162: #define SMBIT(xp, v)     X25SBITS(DP(xp), m_bit, (v))
        !           163: 
        !           164: #define LCN(xp)                (xp -> logical_channel_number + \
        !           165:        (X25GBITS(xp -> bits, lc_group_number) ? (X25GBITS(xp -> bits, lc_group_number) << 8) : 0))
        !           166: #define SET_LCN(xp, lcn) ((xp -> logical_channel_number = lcn), \
        !           167:        (X25SBITS(xp -> bits, lc_group_number, lcn > 255 ? lcn >> 8 : 0)))
        !           168: 
        !           169: struct mbuf *pk_template ();
        !           170: 
        !           171: /* Define X.25 packet level states. */
        !           172: 
        !           173: /* Call setup and clearing substates.  */
        !           174: 
        !           175: #define LISTEN           0
        !           176: #define READY            1
        !           177: #define RECEIVED_CALL    2
        !           178: #define SENT_CALL        3
        !           179: #define DATA_TRANSFER    4
        !           180: #define RECEIVED_CLEAR   5
        !           181: #define SENT_CLEAR       6
        !           182: 
        !           183: /* DTE states. */
        !           184: 
        !           185: #define DTE_WAITING            7
        !           186: #define DTE_RECEIVED_RESTART   8
        !           187: #define DTE_SENT_RESTART       9
        !           188: #define DTE_READY              0
        !           189: 
        !           190: /* Cleaning out ... */
        !           191: 
        !           192: #define LCN_ZOMBIE             10
        !           193: 
        !           194: #define MAXSTATES              11
        !           195: 
        !           196: /*
        !           197:  *  The following definitions are used in a switch statement after
        !           198:  *  determining the packet type.  These values are returned by the
        !           199:  *  pk_decode procedure. 
        !           200:  */
        !           201: 
        !           202: #define CALL             0 * MAXSTATES
        !           203: #define CALL_ACCEPTED    1 * MAXSTATES
        !           204: #define CLEAR            2 * MAXSTATES
        !           205: #define CLEAR_CONF       3 * MAXSTATES
        !           206: #define DATA             4 * MAXSTATES
        !           207: #define INTERRUPT        5 * MAXSTATES
        !           208: #define INTERRUPT_CONF   6 * MAXSTATES
        !           209: #define RR               7 * MAXSTATES
        !           210: #define RNR              8 * MAXSTATES
        !           211: #define RESET            9 * MAXSTATES
        !           212: #define RESET_CONF      10 * MAXSTATES
        !           213: #define RESTART         11 * MAXSTATES
        !           214: #define RESTART_CONF    12 * MAXSTATES
        !           215: #define REJECT          13 * MAXSTATES
        !           216: #define DIAG_TYPE       14 * MAXSTATES
        !           217: #define INVALID_PACKET  15 * MAXSTATES
        !           218: #define DELETE_PACKET  INVALID_PACKET
        !           219: 
        !           220: /*
        !           221:  * The following definitions are used by the restart procedures
        !           222:  * for noting wether the PLE is supposed to behave as DTE or DCE
        !           223:  * (essentially necessary for operation over LLC2)
        !           224:  */
        !           225: #define        DTE_DXERESOLVING        0x0001
        !           226: #define        DTE_PLAYDTE             0x0002
        !           227: #define        DTE_PLAYDCE             0x0004
        !           228: #define DTE_CONNECTPENDING     0x0010
        !           229: #define        DTE_PRETENDDTE          0x0020
        !           230: 
        !           231: #define MAXRESTARTCOLLISIONS   10

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