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/*

 * ++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. 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.

 * --Copyright--

 */

/*

 *      @(#)nameser.h   8.1 (Berkeley) 6/2/93

 *      $Id: nameser.h,v 1.1.1.1 2001-09-10 07:43:47 simons Exp $

 */

#ifndef _NAMESER_H_

#define _NAMESER_H_

#include <sys/param.h>

#if (!defined(BSD)) || (BSD < 199306)

# include <sys/bitypes.h>

#else

# include <sys/types.h>

#endif

#include <sys/cdefs.h>

#ifdef _AUX_SOURCE

# include <sys/types.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 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 */

        /* 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 */

/*

 * 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)

#ifndef BYTE_ORDER

#if (BSD >= 199103)

# include <machine/endian.h>

#else

#ifdef linux

# include <endian.h>

#else

#define LITTLE_ENDIAN   1234    /* least-significant byte first (vax, pc) */

#define BIG_ENDIAN      4321    /* most-significant byte first (IBM, net) */

#define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long (pdp)*/

#if defined(vax) || defined(ns32000) || defined(sun386) || defined(i386) || \

    defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) || \

    defined(__alpha__) || defined(__alpha)

#define BYTE_ORDER      LITTLE_ENDIAN

#endif

#if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \

    defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \

    defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) || defined(DGUX) ||\

    defined(apollo) || defined(__convex__) || defined(_CRAY) || \

    defined(__hppa) || defined(__hp9000) || \

    defined(__hp9000s300) || defined(__hp9000s700) || \

    defined (BIT_ZERO_ON_LEFT) || defined(m68k)

#define BYTE_ORDER      BIG_ENDIAN

#endif

#endif /* linux */

#endif /* BSD */

#endif /* BYTE_ORDER */

#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 __P((const u_char *));

extern  u_int32_t       _getlong __P((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; \

}

#endif /* !_NAMESER_H_ */