| 1 | /* |
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| 2 | * ++Copyright++ 1983, 1989, 1993 |
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| 3 | * - |
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| 4 | * Copyright (c) 1983, 1989, 1993 |
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| 5 | * The Regents of the University of California. All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms, with or without |
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| 8 | * modification, are permitted provided that the following conditions |
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| 9 | * are met: |
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| 10 | * 1. Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * 3. All advertising materials mentioning features or use of this software |
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| 16 | * must display the following acknowledgement: |
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| 17 | * This product includes software developed by the University of |
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| 18 | * California, Berkeley and its contributors. |
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| 19 | * 4. Neither the name of the University nor the names of its contributors |
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| 20 | * may be used to endorse or promote products derived from this software |
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| 21 | * without specific prior written permission. |
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| 22 | * |
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 33 | * SUCH DAMAGE. |
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| 34 | * - |
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| 35 | * Portions Copyright (c) 1993 by Digital Equipment Corporation. |
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| 36 | * |
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| 37 | * Permission to use, copy, modify, and distribute this software for any |
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| 38 | * purpose with or without fee is hereby granted, provided that the above |
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| 39 | * copyright notice and this permission notice appear in all copies, and that |
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| 40 | * the name of Digital Equipment Corporation not be used in advertising or |
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| 41 | * publicity pertaining to distribution of the document or software without |
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| 42 | * specific, written prior permission. |
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| 43 | * |
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| 44 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL |
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| 45 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES |
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| 46 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT |
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| 47 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
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| 48 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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| 49 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
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| 50 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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| 51 | * SOFTWARE. |
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| 52 | * - |
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| 53 | * Portions Copyright (c) 1995 by International Business Machines, Inc. |
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| 54 | * |
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| 55 | * International Business Machines, Inc. (hereinafter called IBM) grants |
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| 56 | * permission under its copyrights to use, copy, modify, and distribute this |
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| 57 | * Software with or without fee, provided that the above copyright notice and |
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| 58 | * all paragraphs of this notice appear in all copies, and that the name of IBM |
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| 59 | * not be used in connection with the marketing of any product incorporating |
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| 60 | * the Software or modifications thereof, without specific, written prior |
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| 61 | * permission. |
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| 62 | * |
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| 63 | * To the extent it has a right to do so, IBM grants an immunity from suit |
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| 64 | * under its patents, if any, for the use, sale or manufacture of products to |
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| 65 | * the extent that such products are used for performing Domain Name System |
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| 66 | * dynamic updates in TCP/IP networks by means of the Software. No immunity is |
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| 67 | * granted for any product per se or for any other function of any product. |
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| 68 | * |
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| 69 | * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, |
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| 70 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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| 71 | * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, |
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| 72 | * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING |
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| 73 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN |
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| 74 | * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. |
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| 75 | * --Copyright-- |
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| 76 | */ |
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| 77 | |
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| 78 | /* |
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| 79 | * @(#)nameser.h 8.1 (Berkeley) 6/2/93 |
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| 80 | * $Id: nameser.h,v 8.11 1996/10/08 04:51:02 vixie Exp $ |
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| 81 | */ |
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| 82 | |
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| 83 | #ifndef _NAMESER_H_ |
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| 84 | #define _NAMESER_H_ |
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| 85 | |
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| 86 | #ifndef WINNT |
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| 87 | #include <sys/param.h> |
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| 88 | #endif |
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| 89 | #if (!defined(BSD)) || (BSD < 199306) |
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| 90 | # include <sys/bitypes.h> |
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| 91 | #else |
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| 92 | # include <sys/types.h> |
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| 93 | #endif |
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| 94 | #include <sys/cdefs.h> |
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| 95 | |
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| 96 | #ifdef _AUX_SOURCE |
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| 97 | # include <sys/types.h> |
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| 98 | #endif |
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| 99 | |
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| 100 | /* |
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| 101 | * revision information. this is the release date in YYYYMMDD format. |
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| 102 | * it can change every day so the right thing to do with it is use it |
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| 103 | * in preprocessor commands such as "#if (__BIND > 19931104)". do not |
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| 104 | * compare for equality; rather, use it to determine whether your resolver |
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| 105 | * is new enough to contain a certain feature. |
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| 106 | */ |
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| 107 | |
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| 108 | #define __BIND 19960801 /* interface version stamp */ |
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| 109 | |
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| 110 | /* |
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| 111 | * Define constants based on rfc883 |
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| 112 | */ |
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| 113 | #define PACKETSZ 512 /* maximum packet size */ |
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| 114 | #define MAXDNAME 1025 /* maximum presentation domain name */ |
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| 115 | #define MAXCDNAME 255 /* maximum compressed domain name */ |
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| 116 | #define MAXLABEL 63 /* maximum length of domain label */ |
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| 117 | #define HFIXEDSZ 12 /* #/bytes of fixed data in header */ |
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| 118 | #define QFIXEDSZ 4 /* #/bytes of fixed data in query */ |
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| 119 | #define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */ |
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| 120 | #define INT32SZ 4 /* for systems without 32-bit ints */ |
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| 121 | #define INT16SZ 2 /* for systems without 16-bit ints */ |
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| 122 | #define INADDRSZ 4 /* IPv4 T_A */ |
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| 123 | #define IN6ADDRSZ 16 /* IPv6 T_AAAA */ |
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| 124 | |
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| 125 | /* |
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| 126 | * Internet nameserver port number |
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| 127 | */ |
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| 128 | #define NAMESERVER_PORT 53 |
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| 129 | |
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| 130 | /* |
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| 131 | * Currently defined opcodes |
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| 132 | */ |
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| 133 | #define QUERY 0x0 /* standard query */ |
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| 134 | #define IQUERY 0x1 /* inverse query */ |
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| 135 | #define STATUS 0x2 /* nameserver status query */ |
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| 136 | /*#define xxx 0x3*/ /* 0x3 reserved */ |
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| 137 | #define NS_NOTIFY_OP 0x4 /* notify secondary of SOA change */ |
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| 138 | /* |
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| 139 | * Currently defined response codes |
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| 140 | */ |
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| 141 | #if !(defined(WINNT) && defined(NOERROR)) |
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| 142 | #define NOERROR 0 /* no error */ |
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| 143 | #endif |
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| 144 | #define FORMERR 1 /* format error */ |
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| 145 | #define SERVFAIL 2 /* server failure */ |
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| 146 | #define NXDOMAIN 3 /* non existent domain */ |
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| 147 | #define NOTIMP 4 /* not implemented */ |
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| 148 | #define REFUSED 5 /* query refused */ |
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| 149 | |
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| 150 | /* |
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| 151 | * Type values for resources and queries |
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| 152 | */ |
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| 153 | #define T_A 1 /* host address */ |
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| 154 | #define T_NS 2 /* authoritative server */ |
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| 155 | #define T_MD 3 /* mail destination */ |
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| 156 | #define T_MF 4 /* mail forwarder */ |
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| 157 | #define T_CNAME 5 /* canonical name */ |
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| 158 | #define T_SOA 6 /* start of authority zone */ |
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| 159 | #define T_MB 7 /* mailbox domain name */ |
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| 160 | #define T_MG 8 /* mail group member */ |
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| 161 | #define T_MR 9 /* mail rename name */ |
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| 162 | #define T_NULL 10 /* null resource record */ |
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| 163 | #define T_WKS 11 /* well known service */ |
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| 164 | #define T_PTR 12 /* domain name pointer */ |
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| 165 | #define T_HINFO 13 /* host information */ |
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| 166 | #define T_MINFO 14 /* mailbox information */ |
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| 167 | #define T_MX 15 /* mail routing information */ |
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| 168 | #define T_TXT 16 /* text strings */ |
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| 169 | #define T_RP 17 /* responsible person */ |
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| 170 | #define T_AFSDB 18 /* AFS cell database */ |
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| 171 | #define T_X25 19 /* X_25 calling address */ |
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| 172 | #define T_ISDN 20 /* ISDN calling address */ |
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| 173 | #define T_RT 21 /* router */ |
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| 174 | #define T_NSAP 22 /* NSAP address */ |
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| 175 | #define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */ |
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| 176 | #define T_SIG 24 /* security signature */ |
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| 177 | #define T_KEY 25 /* security key */ |
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| 178 | #define T_PX 26 /* X.400 mail mapping */ |
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| 179 | #define T_GPOS 27 /* geographical position (withdrawn) */ |
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| 180 | #define T_AAAA 28 /* IP6 Address */ |
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| 181 | #define T_LOC 29 /* Location Information */ |
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| 182 | #define T_NXT 30 /* Next Valid Name in Zone */ |
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| 183 | #define T_EID 31 /* Endpoint identifier */ |
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| 184 | #define T_NIMLOC 32 /* Nimrod locator */ |
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| 185 | #define T_SRV 33 /* Server selection */ |
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| 186 | #define T_ATMA 34 /* ATM Address */ |
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| 187 | #define T_NAPTR 35 /* Naming Authority PoinTeR */ |
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| 188 | /* non standard */ |
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| 189 | #define T_UINFO 100 /* user (finger) information */ |
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| 190 | #define T_UID 101 /* user ID */ |
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| 191 | #define T_GID 102 /* group ID */ |
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| 192 | #define T_UNSPEC 103 /* Unspecified format (binary data) */ |
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| 193 | /* Query type values which do not appear in resource records */ |
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| 194 | #define T_IXFR 251 /* incremental zone transfer */ |
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| 195 | #define T_AXFR 252 /* transfer zone of authority */ |
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| 196 | #define T_MAILB 253 /* transfer mailbox records */ |
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| 197 | #define T_MAILA 254 /* transfer mail agent records */ |
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| 198 | #define T_ANY 255 /* wildcard match */ |
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| 199 | |
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| 200 | /* |
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| 201 | * Values for class field |
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| 202 | */ |
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| 203 | |
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| 204 | #define C_IN 1 /* the arpa internet */ |
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| 205 | #define C_CHAOS 3 /* for chaos net (MIT) */ |
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| 206 | #define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ |
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| 207 | /* Query class values which do not appear in resource records */ |
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| 208 | #define C_ANY 255 /* wildcard match */ |
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| 209 | |
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| 210 | /* |
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| 211 | * Flags field of the KEY RR rdata |
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| 212 | */ |
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| 213 | #define KEYFLAG_TYPEMASK 0xC000 /* Mask for "type" bits */ |
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| 214 | #define KEYFLAG_TYPE_AUTH_CONF 0x0000 /* Key usable for both */ |
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| 215 | #define KEYFLAG_TYPE_CONF_ONLY 0x8000 /* Key usable for confidentiality */ |
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| 216 | #define KEYFLAG_TYPE_AUTH_ONLY 0x4000 /* Key usable for authentication */ |
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| 217 | #define KEYFLAG_TYPE_NO_KEY 0xC000 /* No key usable for either; no key */ |
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| 218 | /* The type bits can also be interpreted independently, as single bits: */ |
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| 219 | #define KEYFLAG_NO_AUTH 0x8000 /* Key not usable for authentication */ |
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| 220 | #define KEYFLAG_NO_CONF 0x4000 /* Key not usable for confidentiality */ |
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| 221 | |
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| 222 | #define KEYFLAG_EXPERIMENTAL 0x2000 /* Security is *mandatory* if bit=0 */ |
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| 223 | #define KEYFLAG_RESERVED3 0x1000 /* reserved - must be zero */ |
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| 224 | #define KEYFLAG_RESERVED4 0x0800 /* reserved - must be zero */ |
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| 225 | #define KEYFLAG_USERACCOUNT 0x0400 /* key is assoc. with a user acct */ |
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| 226 | #define KEYFLAG_ENTITY 0x0200 /* key is assoc. with entity eg host */ |
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| 227 | #define KEYFLAG_ZONEKEY 0x0100 /* key is zone key for the zone named */ |
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| 228 | #define KEYFLAG_IPSEC 0x0080 /* key is for IPSEC use (host or user)*/ |
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| 229 | #define KEYFLAG_EMAIL 0x0040 /* key is for email (MIME security) */ |
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| 230 | #define KEYFLAG_RESERVED10 0x0020 /* reserved - must be zero */ |
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| 231 | #define KEYFLAG_RESERVED11 0x0010 /* reserved - must be zero */ |
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| 232 | #define KEYFLAG_SIGNATORYMASK 0x000F /* key can sign DNS RR's of same name */ |
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| 233 | |
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| 234 | #define KEYFLAG_RESERVED_BITMASK ( KEYFLAG_RESERVED3 | \ |
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| 235 | KEYFLAG_RESERVED4 | \ |
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| 236 | KEYFLAG_RESERVED10| KEYFLAG_RESERVED11) |
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| 237 | |
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| 238 | /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */ |
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| 239 | #define ALGORITHM_MD5RSA 1 /* MD5 with RSA */ |
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| 240 | #define ALGORITHM_EXPIRE_ONLY 253 /* No alg, no security */ |
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| 241 | #define ALGORITHM_PRIVATE_OID 254 /* Key begins with OID indicating alg */ |
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| 242 | |
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| 243 | /* Signatures */ |
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| 244 | /* Size of a mod or exp in bits */ |
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| 245 | #define MIN_MD5RSA_KEY_PART_BITS 512 |
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| 246 | #define MAX_MD5RSA_KEY_PART_BITS 2552 |
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| 247 | /* Total of binary mod and exp, bytes */ |
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| 248 | #define MAX_MD5RSA_KEY_BYTES ((MAX_MD5RSA_KEY_PART_BITS+7/8)*2+3) |
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| 249 | /* Max length of text sig block */ |
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| 250 | #define MAX_KEY_BASE64 (((MAX_MD5RSA_KEY_BYTES+2)/3)*4) |
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| 251 | |
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| 252 | /* |
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| 253 | * Status return codes for T_UNSPEC conversion routines |
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| 254 | */ |
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| 255 | #define CONV_SUCCESS 0 |
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| 256 | #define CONV_OVERFLOW (-1) |
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| 257 | #define CONV_BADFMT (-2) |
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| 258 | #define CONV_BADCKSUM (-3) |
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| 259 | #define CONV_BADBUFLEN (-4) |
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| 260 | |
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| 261 | #ifndef BYTE_ORDER |
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| 262 | #if (BSD >= 199103) |
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| 263 | # include <machine/endian.h> |
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| 264 | #else |
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| 265 | #ifdef linux |
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| 266 | # include <endian.h> |
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| 267 | #else |
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| 268 | #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax, pc) */ |
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| 269 | #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ |
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| 270 | #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp)*/ |
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| 271 | |
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| 272 | #if defined(vax) || defined(ns32000) || defined(sun386) || defined(i386) || \ |
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| 273 | defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) || \ |
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| 274 | defined(__alpha__) || defined(__alpha) |
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| 275 | #define BYTE_ORDER LITTLE_ENDIAN |
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| 276 | #endif |
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| 277 | |
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| 278 | #if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \ |
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| 279 | defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \ |
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| 280 | defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) || defined(DGUX) ||\ |
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| 281 | defined(apollo) || defined(__convex__) || defined(_CRAY) || \ |
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| 282 | defined(__hppa) || defined(__hp9000) || \ |
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| 283 | defined(__hp9000s300) || defined(__hp9000s700) || \ |
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| 284 | defined (BIT_ZERO_ON_LEFT) || defined(m68k) |
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| 285 | #define BYTE_ORDER BIG_ENDIAN |
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| 286 | #endif |
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| 287 | #endif /* linux */ |
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| 288 | #endif /* BSD */ |
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| 289 | #endif /* BYTE_ORDER */ |
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| 290 | |
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| 291 | #if !defined(BYTE_ORDER) || \ |
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| 292 | (BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN && \ |
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| 293 | BYTE_ORDER != PDP_ENDIAN) |
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| 294 | /* you must determine what the correct bit order is for |
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| 295 | * your compiler - the next line is an intentional error |
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| 296 | * which will force your compiles to bomb until you fix |
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| 297 | * the above macros. |
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| 298 | error "Undefined or invalid BYTE_ORDER"; |
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| 299 | */ |
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| 300 | #endif |
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| 301 | |
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| 302 | /* |
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| 303 | * Structure for query header. The order of the fields is machine- and |
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| 304 | * compiler-dependent, depending on the byte/bit order and the layout |
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| 305 | * of bit fields. We use bit fields only in int variables, as this |
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| 306 | * is all ANSI requires. This requires a somewhat confusing rearrangement. |
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| 307 | */ |
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| 308 | |
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| 309 | typedef struct { |
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| 310 | unsigned id :16; /* query identification number */ |
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| 311 | #if BYTE_ORDER == BIG_ENDIAN |
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| 312 | /* fields in third byte */ |
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| 313 | unsigned qr: 1; /* response flag */ |
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| 314 | unsigned opcode: 4; /* purpose of message */ |
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| 315 | unsigned aa: 1; /* authoritive answer */ |
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| 316 | unsigned tc: 1; /* truncated message */ |
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| 317 | unsigned rd: 1; /* recursion desired */ |
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| 318 | /* fields in fourth byte */ |
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| 319 | unsigned ra: 1; /* recursion available */ |
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| 320 | unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ |
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| 321 | unsigned ad: 1; /* authentic data from named */ |
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| 322 | unsigned cd: 1; /* checking disabled by resolver */ |
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| 323 | unsigned rcode :4; /* response code */ |
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| 324 | #endif |
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| 325 | #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN |
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| 326 | /* fields in third byte */ |
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| 327 | unsigned rd :1; /* recursion desired */ |
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| 328 | unsigned tc :1; /* truncated message */ |
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| 329 | unsigned aa :1; /* authoritive answer */ |
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| 330 | unsigned opcode :4; /* purpose of message */ |
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| 331 | unsigned qr :1; /* response flag */ |
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| 332 | /* fields in fourth byte */ |
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| 333 | unsigned rcode :4; /* response code */ |
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| 334 | unsigned cd: 1; /* checking disabled by resolver */ |
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| 335 | unsigned ad: 1; /* authentic data from named */ |
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| 336 | unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ |
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| 337 | unsigned ra :1; /* recursion available */ |
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| 338 | #endif |
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| 339 | /* remaining bytes */ |
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| 340 | unsigned qdcount :16; /* number of question entries */ |
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| 341 | unsigned ancount :16; /* number of answer entries */ |
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| 342 | unsigned nscount :16; /* number of authority entries */ |
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| 343 | unsigned arcount :16; /* number of resource entries */ |
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| 344 | } HEADER; |
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| 345 | |
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| 346 | /* |
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| 347 | * Defines for handling compressed domain names |
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| 348 | */ |
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| 349 | #define INDIR_MASK 0xc0 |
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| 350 | |
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| 351 | extern u_int16_t _getshort __P((const u_char *)); |
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| 352 | extern u_int32_t _getlong __P((const u_char *)); |
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| 353 | |
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| 354 | /* |
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| 355 | * Inline versions of get/put short/long. Pointer is advanced. |
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| 356 | * |
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| 357 | * These macros demonstrate the property of C whereby it can be |
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| 358 | * portable or it can be elegant but rarely both. |
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| 359 | */ |
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| 360 | #define GETSHORT(s, cp) { \ |
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| 361 | register u_char *t_cp = (u_char *)(cp); \ |
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| 362 | (s) = ((u_int16_t)t_cp[0] << 8) \ |
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| 363 | | ((u_int16_t)t_cp[1]) \ |
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| 364 | ; \ |
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| 365 | (cp) += INT16SZ; \ |
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| 366 | } |
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| 367 | |
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| 368 | #define GETLONG(l, cp) { \ |
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| 369 | register u_char *t_cp = (u_char *)(cp); \ |
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| 370 | (l) = ((u_int32_t)t_cp[0] << 24) \ |
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| 371 | | ((u_int32_t)t_cp[1] << 16) \ |
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| 372 | | ((u_int32_t)t_cp[2] << 8) \ |
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| 373 | | ((u_int32_t)t_cp[3]) \ |
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| 374 | ; \ |
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| 375 | (cp) += INT32SZ; \ |
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| 376 | } |
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| 377 | |
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| 378 | #define PUTSHORT(s, cp) { \ |
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| 379 | register u_int16_t t_s = (u_int16_t)(s); \ |
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| 380 | register u_char *t_cp = (u_char *)(cp); \ |
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| 381 | *t_cp++ = (char) (t_s >> 8); \ |
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| 382 | *t_cp = (char) t_s; \ |
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| 383 | (cp) += INT16SZ; \ |
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| 384 | } |
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| 385 | |
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| 386 | #define PUTLONG(l, cp) { \ |
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| 387 | register u_int32_t t_l = (u_int32_t)(l); \ |
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| 388 | register u_char *t_cp = (u_char *)(cp); \ |
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| 389 | *t_cp++ = t_l >> 24; \ |
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| 390 | *t_cp++ = t_l >> 16; \ |
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| 391 | *t_cp++ = t_l >> 8; \ |
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| 392 | *t_cp = t_l; \ |
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| 393 | (cp) += INT32SZ; \ |
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| 394 | } |
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| 395 | |
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| 396 | #endif /* !_NAMESER_H_ */ |
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