dist/dhcp/includes/arpa/nameser.h

   1 /*
   2  * Copyright (c) 1983, 1989, 1993
   3  *    The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 /*
  31  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
  32  * Copyright (c) 1996-2003 by Internet Software Consortium
  33  *
  34  * Permission to use, copy, modify, and distribute this software for any
  35  * purpose with or without fee is hereby granted, provided that the above
  36  * copyright notice and this permission notice appear in all copies.
  37  *
  38  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  39  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  40  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  41  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  42  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  43  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  44  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  45  *
  46  *   Internet Systems Consortium, Inc.
  47  *   950 Charter Street
  48  *   Redwood City, CA 94063
  49  *   <info@isc.org>
  50  *   http://www.isc.org/
  51  */
  52
  53 /*
  54  *      $Id: nameser.h,v 1.3 2005/08/11 17:13:26 drochner Exp $
  55  */
  56
  57 #ifndef _ARPA_NAMESER_H_
  58 #define _ARPA_NAMESER_H_
  59
  60 /*
  61  * Revision information.  This is the release date in YYYYMMDD format.
  62  * It can change every day so the right thing to do with it is use it
  63  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
  64  * compare for equality; rather, use it to determine whether your libbind.a
  65  * contains a new enough lib/nameser/ to support the feature you need.
  66  */
  67
  68 #define __NAMESER       19991006        /* New interface version stamp. */
  69
  70 /*
  71  * Define constants based on RFC 883, RFC 1034, RFC 1035
  72  */
  73 #define NS_PACKETSZ     512     /* maximum packet size */
  74 #define NS_MAXDNAME     1025    /* maximum domain name */
  75 #define NS_MAXCDNAME    255     /* maximum compressed domain name */
  76 #define NS_MAXLABEL     63      /* maximum length of domain label */
  77 #define NS_HFIXEDSZ     12      /* #/bytes of fixed data in header */
  78 #define NS_QFIXEDSZ     4       /* #/bytes of fixed data in query */
  79 #define NS_RRFIXEDSZ    10      /* #/bytes of fixed data in r record */
  80 #define NS_INT32SZ      4       /* #/bytes of data in a u_int32_t */
  81 #define NS_INT16SZ      2       /* #/bytes of data in a u_int16_t */
  82 #define NS_INT8SZ       1       /* #/bytes of data in a u_int8_t */
  83 #define NS_INADDRSZ     4       /* IPv4 T_A */
  84 #define NS_IN6ADDRSZ    16      /* IPv6 T_AAAA */
  85 #define NS_CMPRSFLGS    0xc0    /* Flag bits indicating name compression. */
  86 #define NS_DEFAULTPORT  53      /* For both TCP and UDP. */
  87
  88 /*
  89  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
  90  * in synch with it.
  91  */
  92 typedef enum __ns_sect {
  93         ns_s_qd = 0,            /* Query: Question. */
  94         ns_s_zn = 0,            /* Update: Zone. */
  95         ns_s_an = 1,            /* Query: Answer. */
  96         ns_s_pr = 1,            /* Update: Prerequisites. */
  97         ns_s_ns = 2,            /* Query: Name servers. */
  98         ns_s_ud = 2,            /* Update: Update. */
  99         ns_s_ar = 3,            /* Query|Update: Additional records. */
 100         ns_s_max = 4
 101 } ns_sect;
 102
 103 /*
 104  * This is a message handle.  It is caller allocated and has no dynamic data.
 105  * This structure is intended to be opaque to all but ns_parse.c, thus the
 106  * leading _'s on the member names.  Use the accessor functions, not the _'s.
 107  */
 108 typedef struct __ns_msg {
 109         const u_int8_t  *_msg, *_eom;
 110         u_int16_t       _id, _flags, _counts[ns_s_max];
 111         const u_int8_t  *_sections[ns_s_max];
 112         ns_sect         _sect;
 113         int             _rrnum;
 114         const u_int8_t  *_ptr;
 115 } ns_msg;
 116
 117 /* Private data structure - do not use from outside library. */
 118 struct _ns_flagdata {  int mask, shift;  };
 119 extern struct _ns_flagdata _ns_flagdata[];
 120
 121 /* Accessor macros - this is part of the public interface. */
 122 #define ns_msg_getflag(handle, flag) ( \
 123                         ((handle)._flags & _ns_flagdata[flag].mask) \
 124                          >> _ns_flagdata[flag].shift \
 125                         )
 126 #define ns_msg_id(handle) ((handle)._id + 0)
 127 #define ns_msg_base(handle) ((handle)._msg + 0)
 128 #define ns_msg_end(handle) ((handle)._eom + 0)
 129 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
 130 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
 131
 132 /*
 133  * This is a parsed record.  It is caller allocated and has no dynamic data.
 134  */
 135 typedef struct __ns_rr {
 136         char            name[NS_MAXDNAME];
 137         u_int16_t       type;
 138         u_int16_t       rr_class;
 139         u_int32_t       ttl;
 140         u_int16_t       rdlength;
 141         const u_int8_t *rdata;
 142 } ns_rr;
 143
 144 /* Accessor macros - this is part of the public interface. */
 145 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
 146 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
 147 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
 148 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
 149 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
 150 #define ns_rr_rdata(rr) ((rr).rdata + 0)
 151
 152 /*
 153  * These don't have to be in the same order as in the packet flags word,
 154  * and they can even overlap in some cases, but they will need to be kept
 155  * in synch with ns_parse.c:ns_flagdata[].
 156  */
 157 typedef enum __ns_flag {
 158         ns_f_qr,                /* Question/Response. */
 159         ns_f_opcode,            /* Operation code. */
 160         ns_f_aa,                /* Authoritative Answer. */
 161         ns_f_tc,                /* Truncation occurred. */
 162         ns_f_rd,                /* Recursion Desired. */
 163         ns_f_ra,                /* Recursion Available. */
 164         ns_f_z,                 /* MBZ. */
 165         ns_f_ad,                /* Authentic Data (DNSSEC). */
 166         ns_f_cd,                /* Checking Disabled (DNSSEC). */
 167         ns_f_rcode,             /* Response code. */
 168         ns_f_max
 169 } ns_flag;
 170
 171 /*
 172  * Currently defined opcodes.
 173  */
 174 typedef enum __ns_opcode {
 175         ns_o_query = 0,         /* Standard query. */
 176         ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
 177         ns_o_status = 2,        /* Name server status query (unsupported). */
 178                                 /* Opcode 3 is undefined/reserved. */
 179         ns_o_notify = 4,        /* Zone change notification. */
 180         ns_o_update = 5,        /* Zone update message. */
 181         ns_o_max = 6
 182 } ns_opcode;
 183
 184 /*
 185  * Currently defined response codes.
 186  */
 187 typedef enum __ns_rcode {
 188         ns_r_noerror = 0,       /* No error occurred. */
 189         ns_r_formerr = 1,       /* Format error. */
 190         ns_r_servfail = 2,      /* Server failure. */
 191         ns_r_nxdomain = 3,      /* Name error. */
 192         ns_r_notimpl = 4,       /* Unimplemented. */
 193         ns_r_refused = 5,       /* Operation refused. */
 194         /* these are for BIND_UPDATE */
 195         ns_r_yxdomain = 6,      /* Name exists */
 196         ns_r_yxrrset = 7,       /* RRset exists */
 197         ns_r_nxrrset = 8,       /* RRset does not exist */
 198         ns_r_notauth = 9,       /* Not authoritative for zone */
 199         ns_r_notzone = 10,      /* Zone of record different from zone section */
 200         ns_r_max = 11,
 201         /* The following are TSIG extended errors */
 202         ns_r_badsig = 16,
 203         ns_r_badkey = 17,
 204         ns_r_badtime = 18
 205 } ns_rcode;
 206
 207 /* BIND_UPDATE */
 208 typedef enum __ns_update_operation {
 209         ns_uop_delete = 0,
 210         ns_uop_add = 1,
 211         ns_uop_max = 2
 212 } ns_update_operation;
 213
 214 /*
 215  * This structure is used for TSIG authenticated messages
 216  */
 217 struct ns_tsig_key {
 218         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
 219         unsigned char *data;
 220         unsigned len;
 221 };
 222 typedef struct ns_tsig_key ns_tsig_key;
 223
 224 /*
 225  * This structure is used for TSIG authenticated TCP messages
 226  */
 227 struct ns_tcp_tsig_state {
 228         int counter;
 229         struct dst_key *key;
 230         void *ctx;
 231         unsigned char sig[NS_PACKETSZ];
 232         unsigned siglen;
 233 };
 234 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
 235
 236 #define NS_TSIG_FUDGE 300
 237 #define NS_TSIG_TCP_COUNT 100
 238 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
 239
 240 #define NS_TSIG_ERROR_NO_TSIG -10
 241 #define NS_TSIG_ERROR_NO_SPACE -11
 242 #define NS_TSIG_ERROR_FORMERR -12
 243
 244 /*
 245  * Currently defined type values for resources and queries.
 246  */
 247 typedef enum __ns_type {
 248         ns_t_invalid = 0,       /* Cookie. */
 249         ns_t_a = 1,             /* Host address. */
 250         ns_t_ns = 2,            /* Authoritative server. */
 251         ns_t_md = 3,            /* Mail destination. */
 252         ns_t_mf = 4,            /* Mail forwarder. */
 253         ns_t_cname = 5,         /* Canonical name. */
 254         ns_t_soa = 6,           /* Start of authority zone. */
 255         ns_t_mb = 7,            /* Mailbox domain name. */
 256         ns_t_mg = 8,            /* Mail group member. */
 257         ns_t_mr = 9,            /* Mail rename name. */
 258         ns_t_null = 10,         /* Null resource record. */
 259         ns_t_wks = 11,          /* Well known service. */
 260         ns_t_ptr = 12,          /* Domain name pointer. */
 261         ns_t_hinfo = 13,        /* Host information. */
 262         ns_t_minfo = 14,        /* Mailbox information. */
 263         ns_t_mx = 15,           /* Mail routing information. */
 264         ns_t_txt = 16,          /* Text strings. */
 265         ns_t_rp = 17,           /* Responsible person. */
 266         ns_t_afsdb = 18,        /* AFS cell database. */
 267         ns_t_x25 = 19,          /* X_25 calling address. */
 268         ns_t_isdn = 20,         /* ISDN calling address. */
 269         ns_t_rt = 21,           /* Router. */
 270         ns_t_nsap = 22,         /* NSAP address. */
 271         ns_t_nsap_ptr = 23,     /* Reverse NSAP lookup (deprecated). */
 272         ns_t_sig = 24,          /* Security signature. */
 273         ns_t_key = 25,          /* Security key. */
 274         ns_t_px = 26,           /* X.400 mail mapping. */
 275         ns_t_gpos = 27,         /* Geographical position (withdrawn). */
 276         ns_t_aaaa = 28,         /* Ip6 Address. */
 277         ns_t_loc = 29,          /* Location Information. */
 278         ns_t_nxt = 30,          /* Next domain (security). */
 279         ns_t_eid = 31,          /* Endpoint identifier. */
 280         ns_t_nimloc = 32,       /* Nimrod Locator. */
 281         ns_t_srv = 33,          /* Server Selection. */
 282         ns_t_atma = 34,         /* ATM Address */
 283         ns_t_naptr = 35,        /* Naming Authority PoinTeR */
 284         ns_t_kx = 36,           /* Key Exchange */
 285         ns_t_cert = 37,         /* Certification record */
 286         ns_t_a6 = 38,           /* IPv6 address (deprecates AAAA) */
 287         ns_t_dname = 39,        /* Non-terminal DNAME (for IPv6) */
 288         ns_t_sink = 40,         /* Kitchen sink (experimentatl) */
 289         ns_t_opt = 41,          /* EDNS0 option (meta-RR) */
 290         ns_t_tsig = 250,        /* Transaction signature. */
 291         ns_t_ixfr = 251,        /* Incremental zone transfer. */
 292         ns_t_axfr = 252,        /* Transfer zone of authority. */
 293         ns_t_mailb = 253,       /* Transfer mailbox records. */
 294         ns_t_maila = 254,       /* Transfer mail agent records. */
 295         ns_t_any = 255,         /* Wildcard match. */
 296         ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
 297         ns_t_max = 65536
 298 } ns_type;
 299
 300 /* Exclusively a QTYPE? (not also an RTYPE) */
 301 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 302                       (t) == ns_t_mailb || (t) == ns_t_maila)
 303 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
 304 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 305 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
 306 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 307 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 308 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 309                        (t) == ns_t_zxfr)
 310
 311 /*
 312  * Values for class field
 313  */
 314 typedef enum __ns_class {
 315         ns_c_invalid = 0,       /* Cookie. */
 316         ns_c_in = 1,            /* Internet. */
 317         ns_c_2 = 2,             /* unallocated/unsupported. */
 318         ns_c_chaos = 3,         /* MIT Chaos-net. */
 319         ns_c_hs = 4,            /* MIT Hesiod. */
 320         /* Query class values which do not appear in resource records */
 321         ns_c_none = 254,        /* for prereq. sections in update requests */
 322         ns_c_any = 255,         /* Wildcard match. */
 323         ns_c_max = 65536
 324 } ns_class;
 325
 326 /* DNSSEC constants. */
 327
 328 typedef enum __ns_key_types {
 329         ns_kt_rsa = 1,          /* key type RSA/MD5 */
 330         ns_kt_dh  = 2,          /* Diffie Hellman */
 331         ns_kt_dsa = 3,          /* Digital Signature Standard (MANDATORY) */
 332         ns_kt_private = 254     /* Private key type starts with OID */
 333 } ns_key_types;
 334
 335 typedef enum __ns_cert_types {
 336         cert_t_pkix = 1,        /* PKIX (X.509v3) */
 337         cert_t_spki = 2,        /* SPKI */
 338         cert_t_pgp  = 3,        /* PGP */
 339         cert_t_url  = 253,      /* URL private type */
 340         cert_t_oid  = 254       /* OID private type */
 341 } ns_cert_types;
 342
 343 /* Flags field of the KEY RR rdata. */
 344 #define NS_KEY_TYPEMASK         0xC000  /* Mask for "type" bits */
 345 #define NS_KEY_TYPE_AUTH_CONF   0x0000  /* Key usable for both */
 346 #define NS_KEY_TYPE_CONF_ONLY   0x8000  /* Key usable for confidentiality */
 347 #define NS_KEY_TYPE_AUTH_ONLY   0x4000  /* Key usable for authentication */
 348 #define NS_KEY_TYPE_NO_KEY      0xC000  /* No key usable for either; no key */
 349 /* The type bits can also be interpreted independently, as single bits: */
 350 #define NS_KEY_NO_AUTH          0x8000  /* Key unusable for authentication */
 351 #define NS_KEY_NO_CONF          0x4000  /* Key unusable for confidentiality */
 352 #define NS_KEY_RESERVED2        0x2000  /* Security is *mandatory* if bit=0 */
 353 #define NS_KEY_EXTENDED_FLAGS   0x1000  /* reserved - must be zero */
 354 #define NS_KEY_RESERVED4        0x0800  /* reserved - must be zero */
 355 #define NS_KEY_RESERVED5        0x0400  /* reserved - must be zero */
 356 #define NS_KEY_NAME_TYPE        0x0300  /* these bits determine the type */
 357 #define NS_KEY_NAME_USER        0x0000  /* key is assoc. with user */
 358 #define NS_KEY_NAME_ENTITY      0x0200  /* key is assoc. with entity eg host */
 359 #define NS_KEY_NAME_ZONE        0x0100  /* key is zone key */
 360 #define NS_KEY_NAME_RESERVED    0x0300  /* reserved meaning */
 361 #define NS_KEY_RESERVED8        0x0080  /* reserved - must be zero */
 362 #define NS_KEY_RESERVED9        0x0040  /* reserved - must be zero */
 363 #define NS_KEY_RESERVED10       0x0020  /* reserved - must be zero */
 364 #define NS_KEY_RESERVED11       0x0010  /* reserved - must be zero */
 365 #define NS_KEY_SIGNATORYMASK    0x000F  /* key can sign RR's of same name */
 366 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
 367                                   NS_KEY_RESERVED4 | \
 368                                   NS_KEY_RESERVED5 | \
 369                                   NS_KEY_RESERVED8 | \
 370                                   NS_KEY_RESERVED9 | \
 371                                   NS_KEY_RESERVED10 | \
 372                                   NS_KEY_RESERVED11 )
 373 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */
 374
 375 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
 376 #define NS_ALG_MD5RSA           1       /* MD5 with RSA */
 377 #define NS_ALG_DH               2       /* Diffie Hellman KEY */
 378 #define NS_ALG_DSA              3       /* DSA KEY */
 379 #define NS_ALG_DSS              NS_ALG_DSA
 380 #define NS_ALG_EXPIRE_ONLY      253     /* No alg, no security */
 381 #define NS_ALG_PRIVATE_OID      254     /* Key begins with OID giving alg */
 382
 383 /* Protocol values  */
 384 /* value 0 is reserved */
 385 #define NS_KEY_PROT_TLS         1
 386 #define NS_KEY_PROT_EMAIL       2
 387 #define NS_KEY_PROT_DNSSEC      3
 388 #define NS_KEY_PROT_IPSEC       4
 389 #define NS_KEY_PROT_ANY         255
 390
 391 /* Signatures */
 392 #define NS_MD5RSA_MIN_BITS       512    /* Size of a mod or exp in bits */
 393 #define NS_MD5RSA_MAX_BITS      2552
 394         /* Total of binary mod and exp */
 395 #define NS_MD5RSA_MAX_BYTES     ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
 396         /* Max length of text sig block */
 397 #define NS_MD5RSA_MAX_BASE64    (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
 398 #define NS_MD5RSA_MIN_SIZE      ((NS_MD5RSA_MIN_BITS+7)/8)
 399 #define NS_MD5RSA_MAX_SIZE      ((NS_MD5RSA_MAX_BITS+7)/8)
 400
 401 #define NS_DSA_SIG_SIZE         41
 402 #define NS_DSA_MIN_SIZE         213
 403 #define NS_DSA_MAX_BYTES        405
 404
 405 /* Offsets into SIG record rdata to find various values */
 406 #define NS_SIG_TYPE     0       /* Type flags */
 407 #define NS_SIG_ALG      2       /* Algorithm */
 408 #define NS_SIG_LABELS   3       /* How many labels in name */
 409 #define NS_SIG_OTTL     4       /* Original TTL */
 410 #define NS_SIG_EXPIR    8       /* Expiration time */
 411 #define NS_SIG_SIGNED   12      /* Signature time */
 412 #define NS_SIG_FOOT     16      /* Key footprint */
 413 #define NS_SIG_SIGNER   18      /* Domain name of who signed it */
 414
 415 /* How RR types are represented as bit-flags in NXT records */
 416 #define NS_NXT_BITS 8
 417 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 418 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 419 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 420 #define NS_NXT_MAX 127
 421
 422 /*
 423  * Inline versions of get/put short/long.  Pointer is advanced.
 424  */
 425 #define NS_GET16(s, cp) do { \
 426         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 427         (s) = ((u_int16_t)t_cp[0] << 8) \
 428             | ((u_int16_t)t_cp[1]) \
 429             ; \
 430         (cp) += NS_INT16SZ; \
 431 } while (0)
 432
 433 #define NS_GET32(l, cp) do { \
 434         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 435         (l) = ((u_int32_t)t_cp[0] << 24) \
 436             | ((u_int32_t)t_cp[1] << 16) \
 437             | ((u_int32_t)t_cp[2] << 8) \
 438             | ((u_int32_t)t_cp[3]) \
 439             ; \
 440         (cp) += NS_INT32SZ; \
 441 } while (0)
 442
 443 #define NS_PUT16(s, cp) do { \
 444         register u_int16_t t_s = (u_int16_t)(s); \
 445         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 446         *t_cp++ = t_s >> 8; \
 447         *t_cp   = t_s; \
 448         (cp) += NS_INT16SZ; \
 449 } while (0)
 450
 451 #define NS_PUT32(l, cp) do { \
 452         register u_int32_t t_l = (u_int32_t)(l); \
 453         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 454         *t_cp++ = t_l >> 24; \
 455         *t_cp++ = t_l >> 16; \
 456         *t_cp++ = t_l >> 8; \
 457         *t_cp   = t_l; \
 458         (cp) += NS_INT32SZ; \
 459 } while (0)
 460
 461 #include <arpa/nameser_compat.h>
 462
 463 #endif /* !_ARPA_NAMESER_H_ */