/* $OpenBSD: nameser.h,v 1.11 2005/12/20 02:06:56 millert 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/cdefs.h>
#include <sys/param.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; /* authoritive 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; /* authoritive 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_ */