Subversion Repositories SvarDOS

/*!\file arpa/nameser.h

 * Nameserver API.

 */

/*

 * 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.

 * -

 * --Copyright--

 *

 *      @(#)nameser.h        8.2 (Berkeley) 2/16/94

 *        From Id: nameser.h,v 4.9.1.15 1994/07/19 22:51:24 vixie Exp

 *        $Id: nameser.h,v 1.8 1996/08/29 20:01:00 peter Exp $

 */

#ifndef __ARPA_NAMESER_H

#define __ARPA_NAMESER_H

#ifndef __SYS_W32API_H

#include <sys/w32api.h>

#endif

#ifndef __SYS_PARAM_H

#include <sys/param.h>

#endif

#ifndef __SYS_WTYPES_H

#include <sys/wtypes.h>

#endif

#ifndef __SYS_CDEFS_H

#include <sys/cdefs.h>

#endif

/*

 * 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 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 NS_NOTIFY_OP   0x4             /* notify secondary of SOA change */

#ifdef ALLOW_UPDATES

        /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */

# define UPDATEA       0x9             /* add resource record */

# define UPDATED       0xa             /* delete a specific resource record */

# define UPDATEDA      0xb             /* delete all named resource record */

# define UPDATEM       0xc             /* modify a specific resource record */

# define UPDATEMA      0xd             /* modify all named resource record */

# define ZONEINIT      0xe             /* initial zone transfer */

# define ZONEREF       0xf             /* incremental zone referesh */

#endif

/*

 * Currently defined response codes

 */

#if !defined(WIN32) && !defined(_WIN32)  /* <winerror.h> value is okay */

#define NOERROR        0               /* no error */

#endif

#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 */

#ifdef ALLOW_UPDATES

        /* non standard */

# define NOCHANGE      0xf             /* update failed to change db */

#endif

/*

 * 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 */

        /* 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_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 */

#define T_WINS        0xFF01           /* WINS name lookup */

#define T_WINSR       0xFF02           /* WINS reverse lookup */

/*

 * 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 */

/*

 * 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)

#include <sys/packon.h>

/*

 * 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 */

        /* 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

/*

 * Structure for passing resource records around.

 */

struct rrec {

       u_short  r_zone;            /* zone number */

       u_short  r_class;           /* class number */

       u_short  r_type;            /* type number */

       u_long   r_ttl;             /* time to live */

       int      r_size;            /* size of data area */

       char    *r_data;            /* pointer to data */

     };

#include <sys/packoff.h>

__BEGIN_DECLS

W32_FUNC u_short _getshort (const u_char *);

W32_FUNC u_long  _getlong  (const u_char *);

__END_DECLS

/*

 * 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) do { \

        register u_char *t_cp = (u_char *)(cp); \

        (s) = ((u_short)t_cp[0] << 8) \

            | ((u_short)t_cp[1]); \

        (cp) += INT16SZ; \

      } while (0)

#define GETLONG(l, cp) do { \

        register u_char *t_cp = (u_char *)(cp); \

        (l) = ((u_long)t_cp[0] << 24) \

            | ((u_long)t_cp[1] << 16) \

            | ((u_long)t_cp[2] << 8) \

            | ((u_long)t_cp[3]); \

        (cp) += INT32SZ; \

      } while (0)

#define PUTSHORT(s, cp) do { \

        register u_short t_s = (u_short)(s); \

        register u_char *t_cp = (u_char *)(cp); \

        *t_cp++ = (u_char) (t_s >> 8); \

        *t_cp   = (u_char) t_s; \

        (cp) += INT16SZ; \

      } while (0)

#define PUTLONG(l, cp) do { \

        register u_long t_l = (u_long)(l); \

        register u_char *t_cp = (u_char *)(cp); \

        *t_cp++ = (u_char) (t_l >> 24); \

        *t_cp++ = (u_char) (t_l >> 16); \

        *t_cp++ = (u_char) (t_l >> 8); \

        *t_cp   = (u_char) t_l; \

        (cp) += INT32SZ; \

      } while (0)

#endif