/* $OpenBSD: nameser.h,v 1.15 2022/12/27 07:44:56 jmc Exp $ */ /* * ++Copyright++ 1983, 1989, 1993 * - * Copyright (c) 1983, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * Portions Copyright (c) 1993 by Digital Equipment Corporation. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. * - * Portions Copyright (c) 1995 by International Business Machines, Inc. * * International Business Machines, Inc. (hereinafter called IBM) grants * permission under its copyrights to use, copy, modify, and distribute this * Software with or without fee, provided that the above copyright notice and * all paragraphs of this notice appear in all copies, and that the name of IBM * not be used in connection with the marketing of any product incorporating * the Software or modifications thereof, without specific, written prior * permission. * * To the extent it has a right to do so, IBM grants an immunity from suit * under its patents, if any, for the use, sale or manufacture of products to * the extent that such products are used for performing Domain Name System * dynamic updates in TCP/IP networks by means of the Software. No immunity is * granted for any product per se or for any other function of any product. * * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. * --Copyright-- */ /* * @(#)nameser.h 8.1 (Berkeley) 6/2/93 * $From: nameser.h,v 8.11 1996/10/08 04:51:02 vixie Exp $ */ #ifndef _NAMESER_H_ #define _NAMESER_H_ #include <sys/types.h> /* * revision information. this is the release date in YYYYMMDD format. * it can change every day so the right thing to do with it is use it * in preprocessor commands such as "#if (__BIND > 19931104)". do not * compare for equality; rather, use it to determine whether your resolver * is new enough to contain a certain feature. */ #define __BIND 19960801 /* interface version stamp */ /* * Define constants based on rfc883 */ #define PACKETSZ 512 /* maximum packet size */ #define MAXDNAME 1025 /* maximum presentation domain name */ #define MAXCDNAME 255 /* maximum compressed domain name */ #define MAXLABEL 63 /* maximum length of domain label */ #define HFIXEDSZ 12 /* #/bytes of fixed data in header */ #define QFIXEDSZ 4 /* #/bytes of fixed data in query */ #define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */ #define INT32SZ 4 /* for systems without 32-bit ints */ #define INT16SZ 2 /* for systems without 16-bit ints */ #define INADDRSZ 4 /* IPv4 T_A */ #define IN6ADDRSZ 16 /* IPv6 T_AAAA */ /* * Internet nameserver port number */ #define NAMESERVER_PORT 53 /* * Currently defined opcodes */ #define QUERY 0x0 /* standard query */ #define IQUERY 0x1 /* inverse query */ #define STATUS 0x2 /* nameserver status query */ /*#define xxx 0x3*/ /* 0x3 reserved */ #define NS_NOTIFY_OP 0x4 /* notify secondary of SOA change */ /* * Currently defined response codes */ #define NOERROR 0 /* no error */ #define FORMERR 1 /* format error */ #define SERVFAIL 2 /* server failure */ #define NXDOMAIN 3 /* non existent domain */ #define NOTIMP 4 /* not implemented */ #define REFUSED 5 /* query refused */ /* * Type values for resources and queries */ #define T_A 1 /* host address */ #define T_NS 2 /* authoritative server */ #define T_MD 3 /* mail destination */ #define T_MF 4 /* mail forwarder */ #define T_CNAME 5 /* canonical name */ #define T_SOA 6 /* start of authority zone */ #define T_MB 7 /* mailbox domain name */ #define T_MG 8 /* mail group member */ #define T_MR 9 /* mail rename name */ #define T_NULL 10 /* null resource record */ #define T_WKS 11 /* well known service */ #define T_PTR 12 /* domain name pointer */ #define T_HINFO 13 /* host information */ #define T_MINFO 14 /* mailbox information */ #define T_MX 15 /* mail routing information */ #define T_TXT 16 /* text strings */ #define T_RP 17 /* responsible person */ #define T_AFSDB 18 /* AFS cell database */ #define T_X25 19 /* X_25 calling address */ #define T_ISDN 20 /* ISDN calling address */ #define T_RT 21 /* router */ #define T_NSAP 22 /* NSAP address */ #define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */ #define T_SIG 24 /* security signature */ #define T_KEY 25 /* security key */ #define T_PX 26 /* X.400 mail mapping */ #define T_GPOS 27 /* geographical position (withdrawn) */ #define T_AAAA 28 /* IP6 Address */ #define T_LOC 29 /* Location Information */ #define T_NXT 30 /* Next Valid Name in Zone */ #define T_EID 31 /* Endpoint identifier */ #define T_NIMLOC 32 /* Nimrod locator */ #define T_SRV 33 /* Server selection */ #define T_ATMA 34 /* ATM Address */ #define T_NAPTR 35 /* Naming Authority PoinTeR */ #define T_KX 36 /* Key Exchanger */ #define T_CERT 37 /* CERT */ #define T_A6 38 /* A6 */ #define T_DNAME 39 /* DNAME */ #define T_SINK 40 /* SINK */ #define T_OPT 41 /* OPT pseudo-RR, RFC2671 */ #define T_APL 42 /* APL */ #define T_DS 43 /* Delegation Signer */ #define T_SSHFP 44 /* SSH Key Fingerprint */ #define T_RRSIG 46 /* RRSIG */ #define T_NSEC 47 /* NSEC */ #define T_DNSKEY 48 /* DNSKEY */ /* non standard */ #define T_UINFO 100 /* user (finger) information */ #define T_UID 101 /* user ID */ #define T_GID 102 /* group ID */ #define T_UNSPEC 103 /* Unspecified format (binary data) */ /* Query type values which do not appear in resource records */ #define T_TKEY 249 /* Transaction Key */ #define T_TSIG 250 /* Transaction Signature */ #define T_IXFR 251 /* incremental zone transfer */ #define T_AXFR 252 /* transfer zone of authority */ #define T_MAILB 253 /* transfer mailbox records */ #define T_MAILA 254 /* transfer mail agent records */ #define T_ANY 255 /* wildcard match */ /* * Values for class field */ #define C_IN 1 /* the arpa internet */ #define C_CHAOS 3 /* for chaos net (MIT) */ #define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ /* Query class values which do not appear in resource records */ #define C_ANY 255 /* wildcard match */ /* * Flags field of the KEY RR rdata */ #define KEYFLAG_TYPEMASK 0xC000 /* Mask for "type" bits */ #define KEYFLAG_TYPE_AUTH_CONF 0x0000 /* Key usable for both */ #define KEYFLAG_TYPE_CONF_ONLY 0x8000 /* Key usable for confidentiality */ #define KEYFLAG_TYPE_AUTH_ONLY 0x4000 /* Key usable for authentication */ #define KEYFLAG_TYPE_NO_KEY 0xC000 /* No key usable for either; no key */ /* The type bits can also be interpreted independently, as single bits: */ #define KEYFLAG_NO_AUTH 0x8000 /* Key not usable for authentication */ #define KEYFLAG_NO_CONF 0x4000 /* Key not usable for confidentiality */ #define KEYFLAG_EXPERIMENTAL 0x2000 /* Security is *mandatory* if bit=0 */ #define KEYFLAG_RESERVED3 0x1000 /* reserved - must be zero */ #define KEYFLAG_RESERVED4 0x0800 /* reserved - must be zero */ #define KEYFLAG_USERACCOUNT 0x0400 /* key is assoc. with a user acct */ #define KEYFLAG_ENTITY 0x0200 /* key is assoc. with entity eg host */ #define KEYFLAG_ZONEKEY 0x0100 /* key is zone key for the zone named */ #define KEYFLAG_IPSEC 0x0080 /* key is for IPsec use (host or user)*/ #define KEYFLAG_EMAIL 0x0040 /* key is for email (MIME security) */ #define KEYFLAG_RESERVED10 0x0020 /* reserved - must be zero */ #define KEYFLAG_RESERVED11 0x0010 /* reserved - must be zero */ #define KEYFLAG_SIGNATORYMASK 0x000F /* key can sign DNS RR's of same name */ #define KEYFLAG_RESERVED_BITMASK ( KEYFLAG_RESERVED3 | \ KEYFLAG_RESERVED4 | \ KEYFLAG_RESERVED10| KEYFLAG_RESERVED11) /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */ #define ALGORITHM_MD5RSA 1 /* MD5 with RSA */ #define ALGORITHM_EXPIRE_ONLY 253 /* No alg, no security */ #define ALGORITHM_PRIVATE_OID 254 /* Key begins with OID indicating alg */ /* Signatures */ /* Size of a mod or exp in bits */ #define MIN_MD5RSA_KEY_PART_BITS 512 #define MAX_MD5RSA_KEY_PART_BITS 2552 /* Total of binary mod and exp, bytes */ #define MAX_MD5RSA_KEY_BYTES ((MAX_MD5RSA_KEY_PART_BITS+7/8)*2+3) /* Max length of text sig block */ #define MAX_KEY_BASE64 (((MAX_MD5RSA_KEY_BYTES+2)/3)*4) /* * EDNS0 Z-field extended flags */ #define DNS_MESSAGEEXTFLAG_DO 0x8000U /* * Status return codes for T_UNSPEC conversion routines */ #define CONV_SUCCESS 0 #define CONV_OVERFLOW (-1) #define CONV_BADFMT (-2) #define CONV_BADCKSUM (-3) #define CONV_BADBUFLEN (-4) #if !defined(_BYTE_ORDER) || \ (_BYTE_ORDER != _BIG_ENDIAN && _BYTE_ORDER != _LITTLE_ENDIAN && \ _BYTE_ORDER != _PDP_ENDIAN) /* you must determine what the correct bit order is for * your compiler - the next line is an intentional error * which will force your compiles to bomb until you fix * the above macros. */ #error "Undefined or invalid _BYTE_ORDER"; #endif /* * Structure for query header. The order of the fields is machine- and * compiler-dependent, depending on the byte/bit order and the layout * of bit fields. We use bit fields only in int variables, as this * is all ANSI requires. This requires a somewhat confusing rearrangement. */ typedef struct { unsigned id :16; /* query identification number */ #if _BYTE_ORDER == _BIG_ENDIAN /* fields in third byte */ unsigned qr: 1; /* response flag */ unsigned opcode: 4; /* purpose of message */ unsigned aa: 1; /* authoritative answer */ unsigned tc: 1; /* truncated message */ unsigned rd: 1; /* recursion desired */ /* fields in fourth byte */ unsigned ra: 1; /* recursion available */ unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ unsigned ad: 1; /* authentic data from named */ unsigned cd: 1; /* checking disabled by resolver */ unsigned rcode :4; /* response code */ #endif #if _BYTE_ORDER == _LITTLE_ENDIAN || _BYTE_ORDER == _PDP_ENDIAN /* fields in third byte */ unsigned rd :1; /* recursion desired */ unsigned tc :1; /* truncated message */ unsigned aa :1; /* authoritative answer */ unsigned opcode :4; /* purpose of message */ unsigned qr :1; /* response flag */ /* fields in fourth byte */ unsigned rcode :4; /* response code */ unsigned cd: 1; /* checking disabled by resolver */ unsigned ad: 1; /* authentic data from named */ unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ unsigned ra :1; /* recursion available */ #endif /* remaining bytes */ unsigned qdcount :16; /* number of question entries */ unsigned ancount :16; /* number of answer entries */ unsigned nscount :16; /* number of authority entries */ unsigned arcount :16; /* number of resource entries */ } HEADER; /* * Defines for handling compressed domain names */ #define INDIR_MASK 0xc0 extern u_int16_t _getshort(const unsigned char *); extern u_int32_t _getlong(const unsigned char *); /* * Inline versions of get/put short/long. Pointer is advanced. * * These macros demonstrate the property of C whereby it can be * portable or it can be elegant but rarely both. */ #define GETSHORT(s, cp) { \ unsigned char *t_cp = (unsigned char *)(cp); \ (s) = ((u_int16_t)t_cp[0] << 8) \ | ((u_int16_t)t_cp[1]) \ ; \ (cp) += INT16SZ; \ } #define GETLONG(l, cp) { \ unsigned char *t_cp = (unsigned char *)(cp); \ (l) = ((u_int32_t)t_cp[0] << 24) \ | ((u_int32_t)t_cp[1] << 16) \ | ((u_int32_t)t_cp[2] << 8) \ | ((u_int32_t)t_cp[3]) \ ; \ (cp) += INT32SZ; \ } #define PUTSHORT(s, cp) { \ u_int16_t t_s = (u_int16_t)(s); \ unsigned char *t_cp = (unsigned char *)(cp); \ *t_cp++ = t_s >> 8; \ *t_cp = t_s; \ (cp) += INT16SZ; \ } #define PUTLONG(l, cp) { \ u_int32_t t_l = (u_int32_t)(l); \ unsigned char *t_cp = (unsigned char *)(cp); \ *t_cp++ = t_l >> 24; \ *t_cp++ = t_l >> 16; \ *t_cp++ = t_l >> 8; \ *t_cp = t_l; \ (cp) += INT32SZ; \ } #endif /* !_NAMESER_H_ */
