external/bsd/dhcp/dist/includes/arpa/nameser.h

   1 /*      $NetBSD: nameser.h,v 1.1.1.3 2014/07/12 11:57:57 spz Exp $      */
   2 /*
   3  * Copyright (c) 1983, 1989, 1993
   4  *    The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * Copyright (c) 2004,2009 by Internet Systems Consortium, Inc. ("ISC")
  33  * Copyright (c) 1996-2003 by Internet Software Consortium
  34  *
  35  * Permission to use, copy, modify, and distribute this software for any
  36  * purpose with or without fee is hereby granted, provided that the above
  37  * copyright notice and this permission notice appear in all copies.
  38  *
  39  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  40  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  41  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  42  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  43  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  44  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  45  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  46  *
  47  *   Internet Systems Consortium, Inc.
  48  *   950 Charter Street
  49  *   Redwood City, CA 94063
  50  *   <info@isc.org>
  51  *   https://www.isc.org/
  52  */
  53
  54 /*
  55  *      Id: nameser.h,v 1.7 2009/11/24 02:06:56 sar Exp
  56  */
  57
  58 #ifndef _ARPA_NAMESER_H_
  59 #define _ARPA_NAMESER_H_
  60
  61 /*
  62  * Revision information.  This is the release date in YYYYMMDD format.
  63  * It can change every day so the right thing to do with it is use it
  64  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
  65  * compare for equality; rather, use it to determine whether your libbind.a
  66  * contains a new enough lib/nameser/ to support the feature you need.
  67  */
  68
  69 #define __NAMESER       19991006        /* New interface version stamp. */
  70
  71 /*
  72  * Define constants based on RFC 883, RFC 1034, RFC 1035
  73  */
  74 #define NS_PACKETSZ     512     /* maximum packet size */
  75 #define NS_MAXDNAME     1025    /* maximum domain name */
  76 #define NS_MAXCDNAME    255     /* maximum compressed domain name */
  77 #define NS_MAXLABEL     63      /* maximum length of domain label */
  78 #define NS_HFIXEDSZ     12      /* #/bytes of fixed data in header */
  79 #define NS_QFIXEDSZ     4       /* #/bytes of fixed data in query */
  80 #define NS_RRFIXEDSZ    10      /* #/bytes of fixed data in r record */
  81 #define NS_INT32SZ      4       /* #/bytes of data in a u_int32_t */
  82 #define NS_INT16SZ      2       /* #/bytes of data in a u_int16_t */
  83 #define NS_INT8SZ       1       /* #/bytes of data in a u_int8_t */
  84 #define NS_INADDRSZ     4       /* IPv4 T_A */
  85 #define NS_IN6ADDRSZ    16      /* IPv6 T_AAAA */
  86 #define NS_CMPRSFLGS    0xc0    /* Flag bits indicating name compression. */
  87 #define NS_DEFAULTPORT  53      /* For both TCP and UDP. */
  88
  89 /*
  90  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
  91  * in synch with it.
  92  */
  93 typedef enum __ns_sect {
  94         ns_s_qd = 0,            /* Query: Question. */
  95         ns_s_zn = 0,            /* Update: Zone. */
  96         ns_s_an = 1,            /* Query: Answer. */
  97         ns_s_pr = 1,            /* Update: Prerequisites. */
  98         ns_s_ns = 2,            /* Query: Name servers. */
  99         ns_s_ud = 2,            /* Update: Update. */
 100         ns_s_ar = 3,            /* Query|Update: Additional records. */
 101         ns_s_max = 4
 102 } ns_sect;
 103
 104 /*
 105  * This is a message handle.  It is caller allocated and has no dynamic data.
 106  * This structure is intended to be opaque to all but ns_parse.c, thus the
 107  * leading _'s on the member names.  Use the accessor functions, not the _'s.
 108  */
 109 typedef struct __ns_msg {
 110         const u_int8_t  *_msg, *_eom;
 111         u_int16_t       _id, _flags, _counts[ns_s_max];
 112         const u_int8_t  *_sections[ns_s_max];
 113         ns_sect         _sect;
 114         int             _rrnum;
 115         const u_int8_t  *_ptr;
 116 } ns_msg;
 117
 118 /* Private data structure - do not use from outside library. */
 119 struct _ns_flagdata {  int mask, shift;  };
 120 extern struct _ns_flagdata _ns_flagdata[];
 121
 122 /* Accessor macros - this is part of the public interface. */
 123 #define ns_msg_getflag(handle, flag) ( \
 124                         ((handle)._flags & _ns_flagdata[flag].mask) \
 125                          >> _ns_flagdata[flag].shift \
 126                         )
 127 #define ns_msg_id(handle) ((handle)._id + 0)
 128 #define ns_msg_base(handle) ((handle)._msg + 0)
 129 #define ns_msg_end(handle) ((handle)._eom + 0)
 130 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
 131 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
 132
 133 /*
 134  * This is a parsed record.  It is caller allocated and has no dynamic data.
 135  */
 136 typedef struct __ns_rr {
 137         char            name[NS_MAXDNAME];
 138         u_int16_t       type;
 139         u_int16_t       rr_class;
 140         u_int32_t       ttl;
 141         u_int16_t       rdlength;
 142         const u_int8_t *rdata;
 143 } ns_rr;
 144
 145 /* Accessor macros - this is part of the public interface. */
 146 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
 147 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
 148 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
 149 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
 150 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
 151 #define ns_rr_rdata(rr) ((rr).rdata + 0)
 152
 153 /*
 154  * These don't have to be in the same order as in the packet flags word,
 155  * and they can even overlap in some cases, but they will need to be kept
 156  * in synch with ns_parse.c:ns_flagdata[].
 157  */
 158 typedef enum __ns_flag {
 159         ns_f_qr,                /* Question/Response. */
 160         ns_f_opcode,            /* Operation code. */
 161         ns_f_aa,                /* Authoritative Answer. */
 162         ns_f_tc,                /* Truncation occurred. */
 163         ns_f_rd,                /* Recursion Desired. */
 164         ns_f_ra,                /* Recursion Available. */
 165         ns_f_z,                 /* MBZ. */
 166         ns_f_ad,                /* Authentic Data (DNSSEC). */
 167         ns_f_cd,                /* Checking Disabled (DNSSEC). */
 168         ns_f_rcode,             /* Response code. */
 169         ns_f_max
 170 } ns_flag;
 171
 172 /*
 173  * Currently defined opcodes.
 174  */
 175 typedef enum __ns_opcode {
 176         ns_o_query = 0,         /* Standard query. */
 177         ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
 178         ns_o_status = 2,        /* Name server status query (unsupported). */
 179                                 /* Opcode 3 is undefined/reserved. */
 180         ns_o_notify = 4,        /* Zone change notification. */
 181         ns_o_update = 5,        /* Zone update message. */
 182         ns_o_max = 6
 183 } ns_opcode;
 184
 185 /*
 186  * Currently defined response codes.
 187  */
 188 typedef enum __ns_rcode {
 189         ns_r_noerror = 0,       /* No error occurred. */
 190         ns_r_formerr = 1,       /* Format error. */
 191         ns_r_servfail = 2,      /* Server failure. */
 192         ns_r_nxdomain = 3,      /* Name error. */
 193         ns_r_notimpl = 4,       /* Unimplemented. */
 194         ns_r_refused = 5,       /* Operation refused. */
 195         /* these are for BIND_UPDATE */
 196         ns_r_yxdomain = 6,      /* Name exists */
 197         ns_r_yxrrset = 7,       /* RRset exists */
 198         ns_r_nxrrset = 8,       /* RRset does not exist */
 199         ns_r_notauth = 9,       /* Not authoritative for zone */
 200         ns_r_notzone = 10,      /* Zone of record different from zone section */
 201         ns_r_max = 11,
 202         /* The following are TSIG extended errors */
 203         ns_r_badsig = 16,
 204         ns_r_badkey = 17,
 205         ns_r_badtime = 18
 206 } ns_rcode;
 207
 208 /* BIND_UPDATE */
 209 typedef enum __ns_update_operation {
 210         ns_uop_delete = 0,
 211         ns_uop_add = 1,
 212         ns_uop_max = 2
 213 } ns_update_operation;
 214
 215 /*
 216  * This structure is used for TSIG authenticated messages
 217  */
 218 struct ns_tsig_key {
 219         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
 220         unsigned char *data;
 221         unsigned len;
 222 };
 223 typedef struct ns_tsig_key ns_tsig_key;
 224
 225 /*
 226  * This structure is used for TSIG authenticated TCP messages
 227  */
 228 struct ns_tcp_tsig_state {
 229         int counter;
 230         struct dst_key *key;
 231         void *ctx;
 232         unsigned char sig[NS_PACKETSZ];
 233         unsigned siglen;
 234 };
 235 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
 236
 237 #define NS_TSIG_FUDGE 300
 238 #define NS_TSIG_TCP_COUNT 100
 239 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
 240
 241 #define NS_TSIG_ERROR_NO_TSIG -10
 242 #define NS_TSIG_ERROR_NO_SPACE -11
 243 #define NS_TSIG_ERROR_FORMERR -12
 244
 245 /*
 246  * Currently defined type values for resources and queries.
 247  */
 248 typedef enum __ns_type {
 249         ns_t_invalid = 0,       /* Cookie. */
 250         ns_t_a = 1,             /* Host address. */
 251         ns_t_ns = 2,            /* Authoritative server. */
 252         ns_t_md = 3,            /* Mail destination. */
 253         ns_t_mf = 4,            /* Mail forwarder. */
 254         ns_t_cname = 5,         /* Canonical name. */
 255         ns_t_soa = 6,           /* Start of authority zone. */
 256         ns_t_mb = 7,            /* Mailbox domain name. */
 257         ns_t_mg = 8,            /* Mail group member. */
 258         ns_t_mr = 9,            /* Mail rename name. */
 259         ns_t_null = 10,         /* Null resource record. */
 260         ns_t_wks = 11,          /* Well known service. */
 261         ns_t_ptr = 12,          /* Domain name pointer. */
 262         ns_t_hinfo = 13,        /* Host information. */
 263         ns_t_minfo = 14,        /* Mailbox information. */
 264         ns_t_mx = 15,           /* Mail routing information. */
 265         ns_t_txt = 16,          /* Text strings. */
 266         ns_t_rp = 17,           /* Responsible person. */
 267         ns_t_afsdb = 18,        /* AFS cell database. */
 268         ns_t_x25 = 19,          /* X_25 calling address. */
 269         ns_t_isdn = 20,         /* ISDN calling address. */
 270         ns_t_rt = 21,           /* Router. */
 271         ns_t_nsap = 22,         /* NSAP address. */
 272         ns_t_nsap_ptr = 23,     /* Reverse NSAP lookup (deprecated). */
 273         ns_t_sig = 24,          /* Security signature. */
 274         ns_t_key = 25,          /* Security key. */
 275         ns_t_px = 26,           /* X.400 mail mapping. */
 276         ns_t_gpos = 27,         /* Geographical position (withdrawn). */
 277         ns_t_aaaa = 28,         /* Ip6 Address. */
 278         ns_t_loc = 29,          /* Location Information. */
 279         ns_t_nxt = 30,          /* Next domain (security). */
 280         ns_t_eid = 31,          /* Endpoint identifier. */
 281         ns_t_nimloc = 32,       /* Nimrod Locator. */
 282         ns_t_srv = 33,          /* Server Selection. */
 283         ns_t_atma = 34,         /* ATM Address */
 284         ns_t_naptr = 35,        /* Naming Authority PoinTeR */
 285         ns_t_kx = 36,           /* Key Exchange */
 286         ns_t_cert = 37,         /* Certification record */
 287         ns_t_a6 = 38,           /* IPv6 address (deprecates AAAA) */
 288         ns_t_dname = 39,        /* Non-terminal DNAME (for IPv6) */
 289         ns_t_sink = 40,         /* Kitchen sink (experimentatl) */
 290         ns_t_opt = 41,          /* EDNS0 option (meta-RR) */
 291         ns_t_tsig = 250,        /* Transaction signature. */
 292         ns_t_ixfr = 251,        /* Incremental zone transfer. */
 293         ns_t_axfr = 252,        /* Transfer zone of authority. */
 294         ns_t_mailb = 253,       /* Transfer mailbox records. */
 295         ns_t_maila = 254,       /* Transfer mail agent records. */
 296         ns_t_any = 255,         /* Wildcard match. */
 297         ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
 298         ns_t_max = 65536
 299 } ns_type;
 300
 301 /* Exclusively a QTYPE? (not also an RTYPE) */
 302 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 303                       (t) == ns_t_mailb || (t) == ns_t_maila)
 304 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
 305 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 306 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
 307 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 308 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 309 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 310                        (t) == ns_t_zxfr)
 311
 312 /*
 313  * Values for class field
 314  */
 315 typedef enum __ns_class {
 316         ns_c_invalid = 0,       /* Cookie. */
 317         ns_c_in = 1,            /* Internet. */
 318         ns_c_2 = 2,             /* unallocated/unsupported. */
 319         ns_c_chaos = 3,         /* MIT Chaos-net. */
 320         ns_c_hs = 4,            /* MIT Hesiod. */
 321         /* Query class values which do not appear in resource records */
 322         ns_c_none = 254,        /* for prereq. sections in update requests */
 323         ns_c_any = 255,         /* Wildcard match. */
 324         ns_c_max = 65536
 325 } ns_class;
 326
 327 /* DNSSEC constants. */
 328
 329 typedef enum __ns_key_types {
 330         ns_kt_rsa = 1,          /* key type RSA/MD5 */
 331         ns_kt_dh  = 2,          /* Diffie Hellman */
 332         ns_kt_dsa = 3,          /* Digital Signature Standard (MANDATORY) */
 333         ns_kt_private = 254     /* Private key type starts with OID */
 334 } ns_key_types;
 335
 336 typedef enum __ns_cert_types {
 337         cert_t_pkix = 1,        /* PKIX (X.509v3) */
 338         cert_t_spki = 2,        /* SPKI */
 339         cert_t_pgp  = 3,        /* PGP */
 340         cert_t_url  = 253,      /* URL private type */
 341         cert_t_oid  = 254       /* OID private type */
 342 } ns_cert_types;
 343
 344 /* Flags field of the KEY RR rdata. */
 345 #define NS_KEY_TYPEMASK         0xC000  /* Mask for "type" bits */
 346 #define NS_KEY_TYPE_AUTH_CONF   0x0000  /* Key usable for both */
 347 #define NS_KEY_TYPE_CONF_ONLY   0x8000  /* Key usable for confidentiality */
 348 #define NS_KEY_TYPE_AUTH_ONLY   0x4000  /* Key usable for authentication */
 349 #define NS_KEY_TYPE_NO_KEY      0xC000  /* No key usable for either; no key */
 350 /* The type bits can also be interpreted independently, as single bits: */
 351 #define NS_KEY_NO_AUTH          0x8000  /* Key unusable for authentication */
 352 #define NS_KEY_NO_CONF          0x4000  /* Key unusable for confidentiality */
 353 #define NS_KEY_RESERVED2        0x2000  /* Security is *mandatory* if bit=0 */
 354 #define NS_KEY_EXTENDED_FLAGS   0x1000  /* reserved - must be zero */
 355 #define NS_KEY_RESERVED4        0x0800  /* reserved - must be zero */
 356 #define NS_KEY_RESERVED5        0x0400  /* reserved - must be zero */
 357 #define NS_KEY_NAME_TYPE        0x0300  /* these bits determine the type */
 358 #define NS_KEY_NAME_USER        0x0000  /* key is assoc. with user */
 359 #define NS_KEY_NAME_ENTITY      0x0200  /* key is assoc. with entity eg host */
 360 #define NS_KEY_NAME_ZONE        0x0100  /* key is zone key */
 361 #define NS_KEY_NAME_RESERVED    0x0300  /* reserved meaning */
 362 #define NS_KEY_RESERVED8        0x0080  /* reserved - must be zero */
 363 #define NS_KEY_RESERVED9        0x0040  /* reserved - must be zero */
 364 #define NS_KEY_RESERVED10       0x0020  /* reserved - must be zero */
 365 #define NS_KEY_RESERVED11       0x0010  /* reserved - must be zero */
 366 #define NS_KEY_SIGNATORYMASK    0x000F  /* key can sign RR's of same name */
 367 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
 368                                   NS_KEY_RESERVED4 | \
 369                                   NS_KEY_RESERVED5 | \
 370                                   NS_KEY_RESERVED8 | \
 371                                   NS_KEY_RESERVED9 | \
 372                                   NS_KEY_RESERVED10 | \
 373                                   NS_KEY_RESERVED11 )
 374 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */
 375
 376 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
 377 #define NS_ALG_MD5RSA           1       /* MD5 with RSA */
 378 #define NS_ALG_DH               2       /* Diffie Hellman KEY */
 379 #define NS_ALG_DSA              3       /* DSA KEY */
 380 #define NS_ALG_DSS              NS_ALG_DSA
 381 #define NS_ALG_EXPIRE_ONLY      253     /* No alg, no security */
 382 #define NS_ALG_PRIVATE_OID      254     /* Key begins with OID giving alg */
 383
 384 /* Protocol values  */
 385 /* value 0 is reserved */
 386 #define NS_KEY_PROT_TLS         1
 387 #define NS_KEY_PROT_EMAIL       2
 388 #define NS_KEY_PROT_DNSSEC      3
 389 #define NS_KEY_PROT_IPSEC       4
 390 #define NS_KEY_PROT_ANY         255
 391
 392 /* Signatures */
 393 #define NS_MD5RSA_MIN_BITS       512    /* Size of a mod or exp in bits */
 394 #define NS_MD5RSA_MAX_BITS      2552
 395         /* Total of binary mod and exp */
 396 #define NS_MD5RSA_MAX_BYTES     ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
 397         /* Max length of text sig block */
 398 #define NS_MD5RSA_MAX_BASE64    (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
 399 #define NS_MD5RSA_MIN_SIZE      ((NS_MD5RSA_MIN_BITS+7)/8)
 400 #define NS_MD5RSA_MAX_SIZE      ((NS_MD5RSA_MAX_BITS+7)/8)
 401
 402 #define NS_DSA_SIG_SIZE         41
 403 #define NS_DSA_MIN_SIZE         213
 404 #define NS_DSA_MAX_BYTES        405
 405
 406 /* Offsets into SIG record rdata to find various values */
 407 #define NS_SIG_TYPE     0       /* Type flags */
 408 #define NS_SIG_ALG      2       /* Algorithm */
 409 #define NS_SIG_LABELS   3       /* How many labels in name */
 410 #define NS_SIG_OTTL     4       /* Original TTL */
 411 #define NS_SIG_EXPIR    8       /* Expiration time */
 412 #define NS_SIG_SIGNED   12      /* Signature time */
 413 #define NS_SIG_FOOT     16      /* Key footprint */
 414 #define NS_SIG_SIGNER   18      /* Domain name of who signed it */
 415
 416 /* How RR types are represented as bit-flags in NXT records */
 417 #define NS_NXT_BITS 8
 418 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 419 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 420 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 421 #define NS_NXT_MAX 127
 422
 423 /*
 424  * Inline versions of get/put short/long.  Pointer is advanced.
 425  */
 426 #define NS_GET16(s, cp) do { \
 427         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 428         (s) = ((u_int16_t)t_cp[0] << 8) \
 429             | ((u_int16_t)t_cp[1]) \
 430             ; \
 431         (cp) += NS_INT16SZ; \
 432 } while (0)
 433
 434 #define NS_GET32(l, cp) do { \
 435         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 436         (l) = ((u_int32_t)t_cp[0] << 24) \
 437             | ((u_int32_t)t_cp[1] << 16) \
 438             | ((u_int32_t)t_cp[2] << 8) \
 439             | ((u_int32_t)t_cp[3]) \
 440             ; \
 441         (cp) += NS_INT32SZ; \
 442 } while (0)
 443
 444 #define NS_PUT16(s, cp) do { \
 445         register u_int16_t t_s = (u_int16_t)(s); \
 446         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 447         *t_cp++ = t_s >> 8; \
 448         *t_cp   = t_s; \
 449         (cp) += NS_INT16SZ; \
 450 } while (0)
 451
 452 #define NS_PUT32(l, cp) do { \
 453         register u_int32_t t_l = (u_int32_t)(l); \
 454         register u_int8_t *t_cp = (u_int8_t *)(cp); \
 455         *t_cp++ = t_l >> 24; \
 456         *t_cp++ = t_l >> 16; \
 457         *t_cp++ = t_l >> 8; \
 458         *t_cp   = t_l; \
 459         (cp) += NS_INT32SZ; \
 460 } while (0)
 461
 462 #include <arpa/nameser_compat.h>
 463
 464 #endif /* !_ARPA_NAMESER_H_ */