dns.subproj/nameser8_compat.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * ++Copyright++ 1983, 1989, 1993
  27  * -
  28  * Copyright (c) 1983, 1989, 1993
  29  *    The Regents of the University of California.  All rights reserved.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *      This product includes software developed by the University of
  42  *      California, Berkeley and its contributors.
  43  * 4. Neither the name of the University nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  * -
  59  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
  60  *
  61  * Permission to use, copy, modify, and distribute this software for any
  62  * purpose with or without fee is hereby granted, provided that the above
  63  * copyright notice and this permission notice appear in all copies, and that
  64  * the name of Digital Equipment Corporation not be used in advertising or
  65  * publicity pertaining to distribution of the document or software without
  66  * specific, written prior permission.
  67  *
  68  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
  69  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
  70  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
  71  * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  72  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  73  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  74  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  75  * SOFTWARE.
  76  * -
  77  * --Copyright--
  78  */
  79
  80 /*
  81  *      @(#)nameser.h   8.1 (Berkeley) 6/2/93
  82  *      $Id: nameser8_compat.h,v 1.2 2003/02/18 17:29:24 majka Exp $
  83  */
  84
  85 #ifndef _NAMESER_H_
  86 #define _NAMESER_H_
  87
  88 #include <sys/param.h>
  89 #if (!defined(BSD)) || (BSD < 199306)
  90 # include <sys/bitypes.h>
  91 #else
  92 # include <sys/types.h>
  93 #endif
  94 #include <sys/cdefs.h>
  95
  96 #ifdef _AUX_SOURCE
  97 #include <sys/types.h>                  /* ech for A/UX */
  98 #define res_send ucb_res_send           /* already def'd in libc */
  99 #define _res_close _ucb_res_close    /* removing res_send.o from the library */
 100 #endif                               /* gives an undefined symbol... */
 101
 102 /*
 103  * revision information.  this is the release date in YYYYMMDD format.
 104  * it can change every day so the right thing to do with it is use it
 105  * in preprocessor commands such as "#if (__BIND > 19931104)".  do not
 106  * compare for equality; rather, use it to determine whether your resolver
 107  * is new enough to contain a certain feature.
 108  */
 109
 110 #define __BIND          19950621        /* interface version stamp */
 111
 112 /*
 113  * Define constants based on rfc883
 114  */
 115 #define PACKETSZ        512             /* maximum packet size */
 116 #define MAXDNAME        256             /* maximum domain name */
 117 #define MAXCDNAME       255             /* maximum compressed domain name */
 118 #define MAXLABEL        63              /* maximum length of domain label */
 119 #define HFIXEDSZ        12              /* #/bytes of fixed data in header */
 120 #define QFIXEDSZ        4               /* #/bytes of fixed data in query */
 121 #define RRFIXEDSZ       10              /* #/bytes of fixed data in r record */
 122 #define INT32SZ         4               /* for systems without 32-bit ints */
 123 #define INT16SZ         2               /* for systems without 16-bit ints */
 124 #define INADDRSZ        4               /* for sizeof(struct inaddr) != 4 */
 125
 126 /*
 127  * Internet nameserver port number
 128  */
 129 #define NAMESERVER_PORT 53
 130
 131 /*
 132  * Currently defined opcodes
 133  */
 134 #define QUERY           0x0             /* standard query */
 135 #define IQUERY          0x1             /* inverse query */
 136 #define STATUS          0x2             /* nameserver status query */
 137 /*#define xxx           0x3*/           /* 0x3 reserved */
 138 #define NS_NOTIFY_OP    0x4             /* notify secondary of SOA change */
 139 #ifdef ALLOW_UPDATES
 140         /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */
 141 # define UPDATEA        0x9             /* add resource record */
 142 # define UPDATED        0xa             /* delete a specific resource record */
 143 # define UPDATEDA       0xb             /* delete all named resource record */
 144 # define UPDATEM        0xc             /* modify a specific resource record */
 145 # define UPDATEMA       0xd             /* modify all named resource record */
 146 # define ZONEINIT       0xe             /* initial zone transfer */
 147 # define ZONEREF        0xf             /* incremental zone referesh */
 148 #endif
 149
 150 /*
 151  * Currently defined response codes
 152  */
 153 #define NOERROR         0               /* no error */
 154 #define FORMERR         1               /* format error */
 155 #define SERVFAIL        2               /* server failure */
 156 #define NXDOMAIN        3               /* non existent domain */
 157 #define NOTIMP          4               /* not implemented */
 158 #define REFUSED         5               /* query refused */
 159 #ifdef ALLOW_UPDATES
 160         /* non standard */
 161 # define NOCHANGE       0xf             /* update failed to change db */
 162 #endif
 163
 164 /*
 165  * Type values for resources and queries
 166  */
 167 #define T_A             1               /* host address */
 168 #define T_NS            2               /* authoritative server */
 169 #define T_MD            3               /* mail destination */
 170 #define T_MF            4               /* mail forwarder */
 171 #define T_CNAME         5               /* canonical name */
 172 #define T_SOA           6               /* start of authority zone */
 173 #define T_MB            7               /* mailbox domain name */
 174 #define T_MG            8               /* mail group member */
 175 #define T_MR            9               /* mail rename name */
 176 #define T_NULL          10              /* null resource record */
 177 #define T_WKS           11              /* well known service */
 178 #define T_PTR           12              /* domain name pointer */
 179 #define T_HINFO         13              /* host information */
 180 #define T_MINFO         14              /* mailbox information */
 181 #define T_MX            15              /* mail routing information */
 182 #define T_TXT           16              /* text strings */
 183 #define T_RP            17              /* responsible person */
 184 #define T_AFSDB         18              /* AFS cell database */
 185 #define T_X25           19              /* X_25 calling address */
 186 #define T_ISDN          20              /* ISDN calling address */
 187 #define T_RT            21              /* router */
 188 #define T_NSAP          22              /* NSAP address */
 189 #define T_NSAP_PTR      23              /* reverse NSAP lookup (deprecated) */
 190 #define T_SIG           24              /* security signature */
 191 #define T_KEY           25              /* security key */
 192 #define T_PX            26              /* X.400 mail mapping */
 193 #define T_GPOS          27              /* geographical position (withdrawn) */
 194 #define T_AAAA          28              /* IP6 Address */
 195 #define T_LOC           29              /* Location Information */
 196         /* non standard */
 197 #define T_UINFO         100             /* user (finger) information */
 198 #define T_UID           101             /* user ID */
 199 #define T_GID           102             /* group ID */
 200 #define T_UNSPEC        103             /* Unspecified format (binary data) */
 201         /* Query type values which do not appear in resource records */
 202 #define T_AXFR          252             /* transfer zone of authority */
 203 #define T_MAILB         253             /* transfer mailbox records */
 204 #define T_MAILA         254             /* transfer mail agent records */
 205 #define T_ANY           255             /* wildcard match */
 206
 207 /*
 208  * Values for class field
 209  */
 210
 211 #define C_IN            1               /* the arpa internet */
 212 #define C_CHAOS         3               /* for chaos net (MIT) */
 213 #define C_HS            4               /* for Hesiod name server (MIT) (XXX) */
 214         /* Query class values which do not appear in resource records */
 215 #define C_ANY           255             /* wildcard match */
 216
 217 /*
 218  * Status return codes for T_UNSPEC conversion routines
 219  */
 220 #define CONV_SUCCESS    0
 221 #define CONV_OVERFLOW   (-1)
 222 #define CONV_BADFMT     (-2)
 223 #define CONV_BADCKSUM   (-3)
 224 #define CONV_BADBUFLEN  (-4)
 225
 226 #ifndef BYTE_ORDER
 227 #if (BSD >= 199103)
 228 # include <machine/endian.h>
 229 #else
 230 #ifdef linux
 231 # include <endian.h>
 232 #else
 233 #define LITTLE_ENDIAN   1234    /* least-significant byte first (vax, pc) */
 234 #define BIG_ENDIAN      4321    /* most-significant byte first (IBM, net) */
 235 #define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long (pdp)*/
 236
 237 #if defined(vax) || defined(ns32000) || defined(sun386) || defined(i386) || \
 238     defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) || \
 239     defined(__alpha__) || defined(__alpha)
 240 #define BYTE_ORDER      LITTLE_ENDIAN
 241 #endif
 242
 243 #if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \
 244     defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \
 245     defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) || defined(DGUX) ||\
 246     defined(apollo) || defined(__convex__) || defined(_CRAY) || \
 247     defined(__hppa) || defined(__hp9000) || \
 248     defined(__hp9000s300) || defined(__hp9000s700) || \
 249     defined (BIT_ZERO_ON_LEFT) || defined(m68k)
 250 #define BYTE_ORDER      BIG_ENDIAN
 251 #endif
 252 #endif /* linux */
 253 #endif /* BSD */
 254 #endif /* BYTE_ORDER */
 255
 256 #if !defined(BYTE_ORDER) || \
 257     (BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN && \
 258     BYTE_ORDER != PDP_ENDIAN)
 259         /* you must determine what the correct bit order is for
 260          * your compiler - the next line is an intentional error
 261          * which will force your compiles to bomb until you fix
 262          * the above macros.
 263          */
 264   error "Undefined or invalid BYTE_ORDER";
 265 #endif
 266
 267 /*
 268  * Structure for query header.  The order of the fields is machine- and
 269  * compiler-dependent, depending on the byte/bit order and the layout
 270  * of bit fields.  We use bit fields only in int variables, as this
 271  * is all ANSI requires.  This requires a somewhat confusing rearrangement.
 272  */
 273
 274 typedef struct {
 275         unsigned        id :16;         /* query identification number */
 276 #if BYTE_ORDER == BIG_ENDIAN
 277                         /* fields in third byte */
 278         unsigned        qr: 1;          /* response flag */
 279         unsigned        opcode: 4;      /* purpose of message */
 280         unsigned        aa: 1;          /* authoritive answer */
 281         unsigned        tc: 1;          /* truncated message */
 282         unsigned        rd: 1;          /* recursion desired */
 283                         /* fields in fourth byte */
 284         unsigned        ra: 1;          /* recursion available */
 285         unsigned        unused :3;      /* unused bits (MBZ as of 4.9.3a3) */
 286         unsigned        rcode :4;       /* response code */
 287 #endif
 288 #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN
 289                         /* fields in third byte */
 290         unsigned        rd :1;          /* recursion desired */
 291         unsigned        tc :1;          /* truncated message */
 292         unsigned        aa :1;          /* authoritive answer */
 293         unsigned        opcode :4;      /* purpose of message */
 294         unsigned        qr :1;          /* response flag */
 295                         /* fields in fourth byte */
 296         unsigned        rcode :4;       /* response code */
 297         unsigned        unused :3;      /* unused bits (MBZ as of 4.9.3a3) */
 298         unsigned        ra :1;          /* recursion available */
 299 #endif
 300                         /* remaining bytes */
 301         unsigned        qdcount :16;    /* number of question entries */
 302         unsigned        ancount :16;    /* number of answer entries */
 303         unsigned        nscount :16;    /* number of authority entries */
 304         unsigned        arcount :16;    /* number of resource entries */
 305 } HEADER;
 306
 307 /*
 308  * Defines for handling compressed domain names
 309  */
 310 #define INDIR_MASK      0xc0
 311
 312 /*
 313  * Structure for passing resource records around.
 314  */
 315 struct rrec {
 316         int16_t         r_zone;                 /* zone number */
 317         int16_t         r_class;                /* class number */
 318         int16_t         r_type;                 /* type number */
 319         u_int32_t       r_ttl;                  /* time to live */
 320         int             r_size;                 /* size of data area */
 321         char            *r_data;                /* pointer to data */
 322 };
 323
 324 extern  u_int16_t       _getshort __P((const u_char *));
 325 extern  u_int32_t       _getlong __P((const u_char *));
 326
 327 /*
 328  * Inline versions of get/put short/long.  Pointer is advanced.
 329  *
 330  * These macros demonstrate the property of C whereby it can be
 331  * portable or it can be elegant but rarely both.
 332  */
 333 #define GETSHORT(s, cp) { \
 334         register u_char *t_cp = (u_char *)(cp); \
 335         (s) = ((u_int16_t)t_cp[0] << 8) \
 336             | ((u_int16_t)t_cp[1]) \
 337             ; \
 338         (cp) += INT16SZ; \
 339 }
 340
 341 #define GETLONG(l, cp) { \
 342         register u_char *t_cp = (u_char *)(cp); \
 343         (l) = ((u_int32_t)t_cp[0] << 24) \
 344             | ((u_int32_t)t_cp[1] << 16) \
 345             | ((u_int32_t)t_cp[2] << 8) \
 346             | ((u_int32_t)t_cp[3]) \
 347             ; \
 348         (cp) += INT32SZ; \
 349 }
 350
 351 #define PUTSHORT(s, cp) { \
 352         register u_int16_t t_s = (u_int16_t)(s); \
 353         register u_char *t_cp = (u_char *)(cp); \
 354         *t_cp++ = t_s >> 8; \
 355         *t_cp   = t_s; \
 356         (cp) += INT16SZ; \
 357 }
 358
 359 #define PUTLONG(l, cp) { \
 360         register u_int32_t t_l = (u_int32_t)(l); \
 361         register u_char *t_cp = (u_char *)(cp); \
 362         *t_cp++ = t_l >> 24; \
 363         *t_cp++ = t_l >> 16; \
 364         *t_cp++ = t_l >> 8; \
 365         *t_cp   = t_l; \
 366         (cp) += INT32SZ; \
 367 }
 368
 369 #endif /* !_NAMESER_H_ */