Bug 1697 - Restructed function control flow to aviod branching across initialization.
/* NAMESER.H
*
* Portions Copyright (c) 1993-1999 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
*/
/** @file
@publishedAll
@released
*/
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)nameser.h 8.2 (Berkeley) 2/16/94
* From Id: nameser.h,v 8.11 1996/10/08 04:51:02 vixie Exp
* $Id: nameser.h,v 1.11 1997/02/23 09:17:20 peter Exp $
*/
#ifndef _ARPA_NAMESER_H_
#define _ARPA_NAMESER_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/param.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
*/
/** maximum packet size */
#define PACKETSZ 512
/** maximum presentation domain name */
#define MAXDNAME 1025
/** maximum compressed domain name */
#define MAXCDNAME 255
/** maximum length of domain label */
#define MAXLABEL 63
/** #/bytes of fixed data in header */
#define HFIXEDSZ 12
/** #/bytes of fixed data in query */
#define QFIXEDSZ 4
/** #/bytes of fixed data in r record */
#define RRFIXEDSZ 10
/** for systems without 32-bit ints */
#define INT32SZ 4
/** for systems without 16-bit ints */
#define INT16SZ 2
/** IPv4 T_A */
#define INADDRSZ 4
/** IPv6 T_AAAA */
#define IN6ADDRSZ 16
/**
Internet nameserver port number
*/
#define NAMESERVER_PORT 53
/**
Currently defined opcodes
*/
/** standard query */
#define QUERY 0x0
/** inverse query */
#define IQUERY 0x1
/** nameserver status query */
#define STATUS 0x2
/* 0x3 reserved */
/*#define xxx 0x3 */
#define NS_NOTIFY_OP 0x4 /* notify secondary of SOA change */
/**
Currently defined response codes
*/
/** no error */
#define NOERROR 0
/** format error */
#define FORMERR 1
/** server failure */
#define SERVFAIL 2
/** non existent domain */
#define NXDOMAIN 3
/** not implemented */
#define NOTIMP 4
/** query refused */
#define REFUSED 5
/**
Type values for resources and queries
*/
/** host address */
#define T_A 1
/** authoritative server */
#define T_NS 2
/** mail destination */
#define T_MD 3
/** mail forwarder */
#define T_MF 4
/** canonical name */
#define T_CNAME 5
/** start of authority zone */
#define T_SOA 6
/** mailbox domain name */
#define T_MB 7
/** mail group member */
#define T_MG 8
/** mail rename name */
#define T_MR 9
/** null resource record */
#define T_NULL 10
/** well known service */
#define T_WKS 11
/** domain name pointer */
#define T_PTR 12
/** host information */
#define T_HINFO 13
/** mailbox information */
#define T_MINFO 14
/** mail routing information */
#define T_MX 15
/** text strings */
#define T_TXT 16
/** responsible person */
#define T_RP 17
/** AFS cell database */
#define T_AFSDB 18
/** X_25 calling address */
#define T_X25 19
/** ISDN calling address */
#define T_ISDN 20
/** router */
#define T_RT 21
/** NSAP address */
#define T_NSAP 22
/** reverse NSAP lookup (deprecated) */
#define T_NSAP_PTR 23
/** security signature */
#define T_SIG 24
/** security key */
#define T_KEY 25
/** X.400 mail mapping */
#define T_PX 26
/** geographical position (withdrawn) */
#define T_GPOS 27
/** IP6 Address */
#define T_AAAA 28
/** Location Information */
#define T_LOC 29
/** Next Valid Name in Zone */
#define T_NXT 30
/** Endpoint identifier */
#define T_EID 31
/** Nimrod locator */
#define T_NIMLOC 32
/** Server selection */
#define T_SRV 33
/** ATM Address */
#define T_ATMA 34
/** Naming Authority PoinTeR */
#define T_NAPTR 35
/** user (finger) information
non standard
*/
#define T_UINFO 100
/** user ID */
#define T_UID 101
/** group ID */
#define T_GID 102
/** Unspecified format (binary data) */
#define T_UNSPEC 103
/** Query type values which do not appear in resource records
incremental zone transfer */
#define T_IXFR 251
/** transfer zone of authority */
#define T_AXFR 252
/** transfer mailbox records */
#define T_MAILB 253
/** transfer mail agent records */
#define T_MAILA 254
/** wildcard match */
#define T_ANY 255
/**
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)
/**
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)
/**
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.
EPOC32 is little-endian
*/
typedef struct {
unsigned id :16; /* query identification number */
/* 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 */
/* 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 u_char *);
extern u_int32_t _getlong (const u_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) { \
register u_char *t_cp = (u_char *)(cp); \
(s) = ((u_int16_t)t_cp[0] << 8) \
| ((u_int16_t)t_cp[1]) \
; \
(cp) += INT16SZ; \
}
#define GETLONG(l, cp) { \
register u_char *t_cp = (u_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) { \
register u_int16_t t_s = (u_int16_t)(s); \
register u_char *t_cp = (u_char *)(cp); \
*t_cp++ = t_s >> 8; \
*t_cp = t_s; \
(cp) += INT16SZ; \
}
#define PUTLONG(l, cp) { \
register u_int32_t t_l = (u_int32_t)(l); \
register u_char *t_cp = (u_char *)(cp); \
*t_cp++ = t_l >> 24; \
*t_cp++ = t_l >> 16; \
*t_cp++ = t_l >> 8; \
*t_cp = t_l; \
(cp) += INT32SZ; \
}
#ifdef __cplusplus
}
#endif
#endif /* !_ARPA_NAMESER_H_ */