StdLib/Include/arpa/nameser.h

   1 /*  $NetBSD: nameser.h,v 1.19.4.1 2007/05/17 21:25:12 jdc Exp $ */
   2
   3 /*
   4  * Copyright (c) 1983, 1989, 1993
   5  *    The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
  34  * Copyright (c) 1996-1999 by Internet Software Consortium.
  35  *
  36  * Permission to use, copy, modify, and distribute this software for any
  37  * purpose with or without fee is hereby granted, provided that the above
  38  * copyright notice and this permission notice appear in all copies.
  39  *
  40  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  41  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  42  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  43  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  44  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  45  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  46  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  47  */
  48
  49 /*
  50  *  Id: nameser.h,v 1.7.18.1 2005/04/27 05:00:50 sra Exp
  51  */
  52
  53 #ifndef _ARPA_NAMESER_H_
  54 #define _ARPA_NAMESER_H_
  55
  56 #define BIND_4_COMPAT
  57
  58 #include <sys/param.h>
  59 #if (!defined(BSD)) || (BSD < 199306)
  60 # include <sys/bitypes.h>
  61 #else
  62 # include <sys/types.h>
  63 #endif
  64 #include <sys/EfiCdefs.h>
  65
  66 /*%
  67  * Revision information.  This is the release date in YYYYMMDD format.
  68  * It can change every day so the right thing to do with it is use it
  69  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
  70  * compare for equality; rather, use it to determine whether your libbind.a
  71  * contains a new enough lib/nameser/ to support the feature you need.
  72  */
  73
  74 #define __NAMESER 19991006  /*%< New interface version stamp. */
  75
  76 /*
  77  * Define constants based on RFC0883, RFC1034, RFC 1035
  78  */
  79 #define NS_PACKETSZ 512 /*%< default UDP packet size */
  80 #define NS_MAXDNAME 1025  /*%< maximum domain name */
  81 #define NS_MAXMSG 65535 /*%< maximum message size */
  82 #define NS_MAXCDNAME  255 /*%< maximum compressed domain name */
  83 #define NS_MAXLABEL 63  /*%< maximum length of domain label */
  84 #define NS_HFIXEDSZ 12  /*%< #/bytes of fixed data in header */
  85 #define NS_QFIXEDSZ 4 /*%< #/bytes of fixed data in query */
  86 #define NS_RRFIXEDSZ  10  /*%< #/bytes of fixed data in r record */
  87 #define NS_INT32SZ  4 /*%< #/bytes of data in a u_int32_t */
  88 #define NS_INT16SZ  2 /*%< #/bytes of data in a u_int16_t */
  89 #define NS_INT8SZ 1 /*%< #/bytes of data in a u_int8_t */
  90 #define NS_INADDRSZ 4 /*%< IPv4 T_A */
  91 #define NS_IN6ADDRSZ  16  /*%< IPv6 T_AAAA */
  92 #define NS_CMPRSFLGS  0xc0  /*%< Flag bits indicating name compression. */
  93 #define NS_DEFAULTPORT  53  /*%< For both TCP and UDP. */
  94
  95 /*
  96  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
  97  * in synch with it.
  98  */
  99 typedef enum __ns_sect {
 100   ns_s_qd = 0,    /*%< Query: Question. */
 101   ns_s_zn = 0,    /*%< Update: Zone. */
 102   ns_s_an = 1,    /*%< Query: Answer. */
 103   ns_s_pr = 1,    /*%< Update: Prerequisites. */
 104   ns_s_ns = 2,    /*%< Query: Name servers. */
 105   ns_s_ud = 2,    /*%< Update: Update. */
 106   ns_s_ar = 3,    /*%< Query|Update: Additional records. */
 107   ns_s_max = 4
 108 } ns_sect;
 109
 110 /*%
 111  * This is a message handle.  It is caller allocated and has no dynamic data.
 112  * This structure is intended to be opaque to all but ns_parse.c, thus the
 113  * leading _'s on the member names.  Use the accessor functions, not the _'s.
 114  */
 115 typedef struct __ns_msg {
 116   const u_char  *_msg, *_eom;
 117   uint16_t  _id, _flags, _counts[ns_s_max];
 118   const u_char  *_sections[ns_s_max];
 119   ns_sect   _sect;
 120   int   _rrnum;
 121   const u_char  *_msg_ptr;
 122 } ns_msg;
 123
 124 /* Private data structure - do not use from outside library. */
 125 struct _ns_flagdata {  int mask, shift;  };
 126 extern struct _ns_flagdata _ns_flagdata[];
 127
 128 /* Accessor macros - this is part of the public interface. */
 129
 130 #define ns_msg_id(handle) ((handle)._id + 0)
 131 #define ns_msg_base(handle) ((handle)._msg + 0)
 132 #define ns_msg_end(handle) ((handle)._eom + 0)
 133 #define ns_msg_size(handle) ((size_t)((handle)._eom - (handle)._msg))
 134 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
 135
 136 /*%
 137  * This is a parsed record.  It is caller allocated and has no dynamic data.
 138  */
 139 typedef struct __ns_rr {
 140   char    name[NS_MAXDNAME];
 141   uint16_t  type;
 142   uint16_t  rr_class;
 143   uint32_t  ttl;
 144   uint16_t  rdlength;
 145   const u_char *  rdata;
 146 } ns_rr;
 147
 148 /* Accessor macros - this is part of the public interface. */
 149 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
 150 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
 151 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
 152 #define ns_rr_ttl(rr) ((u_long)(rr).ttl + 0)
 153 #define ns_rr_rdlen(rr) ((size_t)(rr).rdlength + 0)
 154 #define ns_rr_rdata(rr) ((rr).rdata + 0)
 155
 156 /*%
 157  * These don't have to be in the same order as in the packet flags word,
 158  * and they can even overlap in some cases, but they will need to be kept
 159  * in synch with ns_parse.c:ns_flagdata[].
 160  */
 161 typedef enum __ns_flag {
 162   ns_f_qr,    /*%< Question/Response. */
 163   ns_f_opcode,    /*%< Operation code. */
 164   ns_f_aa,    /*%< Authoritative Answer. */
 165   ns_f_tc,    /*%< Truncation occurred. */
 166   ns_f_rd,    /*%< Recursion Desired. */
 167   ns_f_ra,    /*%< Recursion Available. */
 168   ns_f_z,     /*%< MBZ. */
 169   ns_f_ad,    /*%< Authentic Data (DNSSEC). */
 170   ns_f_cd,    /*%< Checking Disabled (DNSSEC). */
 171   ns_f_rcode,   /*%< Response code. */
 172   ns_f_max
 173 } ns_flag;
 174
 175 /*%
 176  * Currently defined opcodes.
 177  */
 178 typedef enum __ns_opcode {
 179   ns_o_query = 0,   /*%< Standard query. */
 180   ns_o_iquery = 1,  /*%< Inverse query (deprecated/unsupported). */
 181   ns_o_status = 2,  /*%< Name server status query (unsupported). */
 182         /* Opcode 3 is undefined/reserved. */
 183   ns_o_notify = 4,  /*%< Zone change notification. */
 184   ns_o_update = 5,  /*%< Zone update message. */
 185   ns_o_max = 6
 186 } ns_opcode;
 187
 188 /*%
 189  * Currently defined response codes.
 190  */
 191 typedef enum __ns_rcode {
 192   ns_r_noerror = 0, /*%< No error occurred. */
 193   ns_r_formerr = 1, /*%< Format error. */
 194   ns_r_servfail = 2,  /*%< Server failure. */
 195   ns_r_nxdomain = 3,  /*%< Name error. */
 196   ns_r_notimpl = 4, /*%< Unimplemented. */
 197   ns_r_refused = 5, /*%< Operation refused. */
 198   /* these are for BIND_UPDATE */
 199   ns_r_yxdomain = 6,  /*%< Name exists */
 200   ns_r_yxrrset = 7, /*%< RRset exists */
 201   ns_r_nxrrset = 8, /*%< RRset does not exist */
 202   ns_r_notauth = 9, /*%< Not authoritative for zone */
 203   ns_r_notzone = 10,  /*%< Zone of record different from zone section */
 204   ns_r_max = 11,
 205   /* The following are EDNS extended rcodes */
 206   ns_r_badvers = 16,
 207   /* The following are TSIG errors */
 208   ns_r_badsig = 16,
 209   ns_r_badkey = 17,
 210   ns_r_badtime = 18
 211 } ns_rcode;
 212
 213 /* BIND_UPDATE */
 214 typedef enum __ns_update_operation {
 215   ns_uop_delete = 0,
 216   ns_uop_add = 1,
 217   ns_uop_max = 2
 218 } ns_update_operation;
 219
 220 /*%
 221  * This structure is used for TSIG authenticated messages
 222  */
 223 struct ns_tsig_key {
 224         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
 225         unsigned char *data;
 226         int len;
 227 };
 228 typedef struct ns_tsig_key ns_tsig_key;
 229
 230 /*%
 231  * This structure is used for TSIG authenticated TCP messages
 232  */
 233 struct ns_tcp_tsig_state {
 234   int counter;
 235   struct dst_key *key;
 236   void *ctx;
 237   unsigned char sig[NS_PACKETSZ];
 238   int siglen;
 239 };
 240 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
 241
 242 #define NS_TSIG_FUDGE 300
 243 #define NS_TSIG_TCP_COUNT 100
 244 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
 245
 246 #define NS_TSIG_ERROR_NO_TSIG -10
 247 #define NS_TSIG_ERROR_NO_SPACE -11
 248 #define NS_TSIG_ERROR_FORMERR -12
 249
 250 /*%
 251  * Currently defined type values for resources and queries.
 252  */
 253 typedef enum __ns_type {
 254   ns_t_invalid = 0, /*%< Cookie. */
 255   ns_t_a = 1,   /*%< Host address. */
 256   ns_t_ns = 2,    /*%< Authoritative server. */
 257   ns_t_md = 3,    /*%< Mail destination. */
 258   ns_t_mf = 4,    /*%< Mail forwarder. */
 259   ns_t_cname = 5,   /*%< Canonical name. */
 260   ns_t_soa = 6,   /*%< Start of authority zone. */
 261   ns_t_mb = 7,    /*%< Mailbox domain name. */
 262   ns_t_mg = 8,    /*%< Mail group member. */
 263   ns_t_mr = 9,    /*%< Mail rename name. */
 264   ns_t_null = 10,   /*%< Null resource record. */
 265   ns_t_wks = 11,    /*%< Well known service. */
 266   ns_t_ptr = 12,    /*%< Domain name pointer. */
 267   ns_t_hinfo = 13,  /*%< Host information. */
 268   ns_t_minfo = 14,  /*%< Mailbox information. */
 269   ns_t_mx = 15,   /*%< Mail routing information. */
 270   ns_t_txt = 16,    /*%< Text strings. */
 271   ns_t_rp = 17,   /*%< Responsible person. */
 272   ns_t_afsdb = 18,  /*%< AFS cell database. */
 273   ns_t_x25 = 19,    /*%< X_25 calling address. */
 274   ns_t_isdn = 20,   /*%< ISDN calling address. */
 275   ns_t_rt = 21,   /*%< Router. */
 276   ns_t_nsap = 22,   /*%< NSAP address. */
 277   ns_t_nsap_ptr = 23, /*%< Reverse NSAP lookup (deprecated). */
 278   ns_t_sig = 24,    /*%< Security signature. */
 279   ns_t_key = 25,    /*%< Security key. */
 280   ns_t_px = 26,   /*%< X.400 mail mapping. */
 281   ns_t_gpos = 27,   /*%< Geographical position (withdrawn). */
 282   ns_t_aaaa = 28,   /*%< Ip6 Address. */
 283   ns_t_loc = 29,    /*%< Location Information. */
 284   ns_t_nxt = 30,    /*%< Next domain (security). */
 285   ns_t_eid = 31,    /*%< Endpoint identifier. */
 286   ns_t_nimloc = 32, /*%< Nimrod Locator. */
 287   ns_t_srv = 33,    /*%< Server Selection. */
 288   ns_t_atma = 34,   /*%< ATM Address */
 289   ns_t_naptr = 35,  /*%< Naming Authority PoinTeR */
 290   ns_t_kx = 36,   /*%< Key Exchange */
 291   ns_t_cert = 37,   /*%< Certification record */
 292   ns_t_a6 = 38,   /*%< IPv6 address (deprecates AAAA) */
 293   ns_t_dname = 39,  /*%< Non-terminal DNAME (for IPv6) */
 294   ns_t_sink = 40,   /*%< Kitchen sink (experimentatl) */
 295   ns_t_opt = 41,    /*%< EDNS0 option (meta-RR) */
 296   ns_t_apl = 42,    /*%< Address prefix list (RFC3123) */
 297   ns_t_tkey = 249,  /*%< Transaction key */
 298   ns_t_tsig = 250,  /*%< Transaction signature. */
 299   ns_t_ixfr = 251,  /*%< Incremental zone transfer. */
 300   ns_t_axfr = 252,  /*%< Transfer zone of authority. */
 301   ns_t_mailb = 253, /*%< Transfer mailbox records. */
 302   ns_t_maila = 254, /*%< Transfer mail agent records. */
 303   ns_t_any = 255,   /*%< Wildcard match. */
 304   ns_t_zxfr = 256,  /*%< BIND-specific, nonstandard. */
 305   ns_t_max = 65536
 306 } ns_type;
 307
 308 /* Exclusively a QTYPE? (not also an RTYPE) */
 309 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 310           (t) == ns_t_mailb || (t) == ns_t_maila)
 311 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
 312 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 313 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
 314 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 315 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 316 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 317            (t) == ns_t_zxfr)
 318
 319 /*%
 320  * Values for class field
 321  */
 322 typedef enum __ns_class {
 323   ns_c_invalid = 0, /*%< Cookie. */
 324   ns_c_in = 1,    /*%< Internet. */
 325   ns_c_2 = 2,   /*%< unallocated/unsupported. */
 326   ns_c_chaos = 3,   /*%< MIT Chaos-net. */
 327   ns_c_hs = 4,    /*%< MIT Hesiod. */
 328   /* Query class values which do not appear in resource records */
 329   ns_c_none = 254,  /*%< for prereq. sections in update requests */
 330   ns_c_any = 255,   /*%< Wildcard match. */
 331   ns_c_max = 65536
 332 } ns_class;
 333
 334 /* DNSSEC constants. */
 335
 336 typedef enum __ns_key_types {
 337   ns_kt_rsa = 1,    /*%< key type RSA/MD5 */
 338   ns_kt_dh  = 2,    /*%< Diffie Hellman */
 339   ns_kt_dsa = 3,    /*%< Digital Signature Standard (MANDATORY) */
 340   ns_kt_private = 254 /*%< Private key type starts with OID */
 341 } ns_key_types;
 342
 343 typedef enum __ns_cert_types {
 344   cert_t_pkix = 1,  /*%< PKIX (X.509v3) */
 345   cert_t_spki = 2,  /*%< SPKI */
 346   cert_t_pgp  = 3,  /*%< PGP */
 347   cert_t_url  = 253,  /*%< URL private type */
 348   cert_t_oid  = 254 /*%< OID private type */
 349 } ns_cert_types;
 350
 351 /* Flags field of the KEY RR rdata. */
 352 #define NS_KEY_TYPEMASK   0xC000  /*%< Mask for "type" bits */
 353 #define NS_KEY_TYPE_AUTH_CONF 0x0000  /*%< Key usable for both */
 354 #define NS_KEY_TYPE_CONF_ONLY 0x8000  /*%< Key usable for confidentiality */
 355 #define NS_KEY_TYPE_AUTH_ONLY 0x4000  /*%< Key usable for authentication */
 356 #define NS_KEY_TYPE_NO_KEY  0xC000  /*%< No key usable for either; no key */
 357 /* The type bits can also be interpreted independently, as single bits: */
 358 #define NS_KEY_NO_AUTH    0x8000  /*%< Key unusable for authentication */
 359 #define NS_KEY_NO_CONF    0x4000  /*%< Key unusable for confidentiality */
 360 #define NS_KEY_RESERVED2  0x2000  /* Security is *mandatory* if bit=0 */
 361 #define NS_KEY_EXTENDED_FLAGS 0x1000  /*%< reserved - must be zero */
 362 #define NS_KEY_RESERVED4  0x0800  /*%< reserved - must be zero */
 363 #define NS_KEY_RESERVED5  0x0400  /*%< reserved - must be zero */
 364 #define NS_KEY_NAME_TYPE  0x0300  /*%< these bits determine the type */
 365 #define NS_KEY_NAME_USER  0x0000  /*%< key is assoc. with user */
 366 #define NS_KEY_NAME_ENTITY  0x0200  /*%< key is assoc. with entity eg host */
 367 #define NS_KEY_NAME_ZONE  0x0100  /*%< key is zone key */
 368 #define NS_KEY_NAME_RESERVED  0x0300  /*%< reserved meaning */
 369 #define NS_KEY_RESERVED8  0x0080  /*%< reserved - must be zero */
 370 #define NS_KEY_RESERVED9  0x0040  /*%< reserved - must be zero */
 371 #define NS_KEY_RESERVED10 0x0020  /*%< reserved - must be zero */
 372 #define NS_KEY_RESERVED11 0x0010  /*%< reserved - must be zero */
 373 #define NS_KEY_SIGNATORYMASK  0x000F  /*%< key can sign RR's of same name */
 374 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
 375           NS_KEY_RESERVED4 | \
 376           NS_KEY_RESERVED5 | \
 377           NS_KEY_RESERVED8 | \
 378           NS_KEY_RESERVED9 | \
 379           NS_KEY_RESERVED10 | \
 380           NS_KEY_RESERVED11 )
 381 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /*%< no bits defined here */
 382
 383 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
 384 #define NS_ALG_MD5RSA   1 /*%< MD5 with RSA */
 385 #define NS_ALG_DH               2 /*%< Diffie Hellman KEY */
 386 #define NS_ALG_DSA              3 /*%< DSA KEY */
 387 #define NS_ALG_DSS              NS_ALG_DSA
 388 #define NS_ALG_EXPIRE_ONLY  253 /*%< No alg, no security */
 389 #define NS_ALG_PRIVATE_OID  254 /*%< Key begins with OID giving alg */
 390
 391 /* Protocol values  */
 392 /* value 0 is reserved */
 393 #define NS_KEY_PROT_TLS         1
 394 #define NS_KEY_PROT_EMAIL       2
 395 #define NS_KEY_PROT_DNSSEC      3
 396 #define NS_KEY_PROT_IPSEC       4
 397 #define NS_KEY_PROT_ANY   255
 398
 399 /* Signatures */
 400 #define NS_MD5RSA_MIN_BITS   512  /*%< Size of a mod or exp in bits */
 401 #define NS_MD5RSA_MAX_BITS  4096
 402   /* Total of binary mod and exp */
 403 #define NS_MD5RSA_MAX_BYTES ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
 404   /* Max length of text sig block */
 405 #define NS_MD5RSA_MAX_BASE64  (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
 406 #define NS_MD5RSA_MIN_SIZE  ((NS_MD5RSA_MIN_BITS+7)/8)
 407 #define NS_MD5RSA_MAX_SIZE  ((NS_MD5RSA_MAX_BITS+7)/8)
 408
 409 #define NS_DSA_SIG_SIZE         41
 410 #define NS_DSA_MIN_SIZE         213
 411 #define NS_DSA_MAX_BYTES        405
 412
 413 /* Offsets into SIG record rdata to find various values */
 414 #define NS_SIG_TYPE 0 /*%< Type flags */
 415 #define NS_SIG_ALG  2 /*%< Algorithm */
 416 #define NS_SIG_LABELS 3 /*%< How many labels in name */
 417 #define NS_SIG_OTTL 4 /*%< Original TTL */
 418 #define NS_SIG_EXPIR  8 /*%< Expiration time */
 419 #define NS_SIG_SIGNED 12  /*%< Signature time */
 420 #define NS_SIG_FOOT 16  /*%< Key footprint */
 421 #define NS_SIG_SIGNER 18  /*%< Domain name of who signed it */
 422
 423 /* How RR types are represented as bit-flags in NXT records */
 424 #define NS_NXT_BITS 8
 425 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 426 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 427 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 428 #define NS_NXT_MAX 127
 429
 430 /*%
 431  * EDNS0 extended flags, host order.
 432  */
 433 #define NS_OPT_DNSSEC_OK  0x8000U
 434
 435 /*%
 436  * Inline versions of get/put short/long.  Pointer is advanced.
 437  */
 438 #define NS_GET16(s, cp) do { \
 439   const u_char *t_cp = (const u_char *)(cp); \
 440   (s) = ((uint16_t)t_cp[0] << 8) \
 441       | ((uint16_t)t_cp[1]) \
 442       ; \
 443   (cp) += NS_INT16SZ; \
 444 } while (/*CONSTCOND*/0)
 445
 446 #define NS_GET32(l, cp) do { \
 447   const u_char *t_cp = (const u_char *)(cp); \
 448   (l) = ((uint32_t)t_cp[0] << 24) \
 449       | ((uint32_t)t_cp[1] << 16) \
 450       | ((uint32_t)t_cp[2] << 8) \
 451       | ((uint32_t)t_cp[3]) \
 452       ; \
 453   (cp) += NS_INT32SZ; \
 454 } while (/*CONSTCOND*/0)
 455
 456 #define NS_PUT16(s, cp) do { \
 457   uint32_t t_s = (uint32_t)(s); \
 458   u_char *t_cp = (u_char *)(cp); \
 459   *t_cp++ = t_s >> 8; \
 460   *t_cp   = t_s; \
 461   (cp) += NS_INT16SZ; \
 462 } while (/*CONSTCOND*/0)
 463
 464 #define NS_PUT32(l, cp) do { \
 465   uint32_t t_l = (uint32_t)(l); \
 466   u_char *t_cp = (u_char *)(cp); \
 467   *t_cp++ = t_l >> 24; \
 468   *t_cp++ = t_l >> 16; \
 469   *t_cp++ = t_l >> 8; \
 470   *t_cp   = t_l; \
 471   (cp) += NS_INT32SZ; \
 472 } while (/*CONSTCOND*/0)
 473
 474 /*%
 475  * ANSI C identifier hiding for bind's lib/nameser.
 476  */
 477 #define ns_msg_getflag    __ns_msg_getflag
 478 #define ns_get16    __ns_get16
 479 #define ns_get32    __ns_get32
 480 #define ns_put16    __ns_put16
 481 #define ns_put32    __ns_put32
 482 #define ns_initparse    __ns_initparse
 483 #define ns_skiprr   __ns_skiprr
 484 #define ns_parserr    __ns_parserr
 485 #define ns_sprintrr   __ns_sprintrr
 486 #define ns_sprintrrf    __ns_sprintrrf
 487 #define ns_format_ttl   __ns_format_ttl
 488 #define ns_parse_ttl    __ns_parse_ttl
 489 #define ns_datetosecs   __ns_datetosecs
 490 #define ns_name_ntol    __ns_name_ntol
 491 #define ns_name_ntop    __ns_name_ntop
 492 #define ns_name_pton    __ns_name_pton
 493 #define ns_name_unpack    __ns_name_unpack
 494 #define ns_name_pack    __ns_name_pack
 495 #define ns_name_compress  __ns_name_compress
 496 #define ns_name_uncompress  __ns_name_uncompress
 497 #define ns_name_skip    __ns_name_skip
 498 #define ns_name_rollback  __ns_name_rollback
 499 #define ns_sign     __ns_sign
 500 #define ns_sign2    __ns_sign2
 501 #define ns_sign_tcp   __ns_sign_tcp
 502 #define ns_sign_tcp2    __ns_sign_tcp2
 503 #define ns_sign_tcp_init  __ns_sign_tcp_init
 504 #define ns_find_tsig    __ns_find_tsig
 505 #define ns_verify   __ns_verify
 506 #define ns_verify_tcp   __ns_verify_tcp
 507 #define ns_verify_tcp_init  __ns_verify_tcp_init
 508 #define ns_samedomain   __ns_samedomain
 509 #define ns_subdomain    __ns_subdomain
 510 #define ns_makecanon    __ns_makecanon
 511 #define ns_samename   __ns_samename
 512
 513 __BEGIN_DECLS
 514 int   ns_msg_getflag(ns_msg, int);
 515 uint16_t  ns_get16(const u_char *);
 516 uint32_t  ns_get32(const u_char *);
 517 void    ns_put16(uint16_t, u_char *);
 518 void    ns_put32(uint32_t, u_char *);
 519 int   ns_initparse(const u_char *, int, ns_msg *);
 520 int   ns_skiprr(const u_char *, const u_char *, ns_sect, int);
 521 int   ns_parserr(ns_msg *, ns_sect, int, ns_rr *);
 522 int   ns_sprintrr(const ns_msg *, const ns_rr *,
 523          const char *, const char *, char *, size_t);
 524 int   ns_sprintrrf(const u_char *, size_t, const char *,
 525           ns_class, ns_type, u_long, const u_char *,
 526           size_t, const char *, const char *,
 527           char *, size_t);
 528 int   ns_format_ttl(u_long, char *, size_t);
 529 int   ns_parse_ttl(const char *, u_long *);
 530 uint32_t  ns_datetosecs(const char *cp, int *errp);
 531 int   ns_name_ntol(const u_char *, u_char *, size_t);
 532 int   ns_name_ntop(const u_char *, char *, size_t);
 533 int   ns_name_pton(const char *, u_char *, size_t);
 534 int   ns_name_unpack(const u_char *, const u_char *,
 535             const u_char *, u_char *, size_t);
 536 int   ns_name_pack(const u_char *, u_char *, int,
 537           const u_char **, const u_char **);
 538 int   ns_name_uncompress(const u_char *, const u_char *,
 539           const u_char *, char *, size_t);
 540 int   ns_name_compress(const char *, u_char *, size_t,
 541               const u_char **, const u_char **);
 542 int   ns_name_skip(const u_char **, const u_char *);
 543 void    ns_name_rollback(const u_char *, const u_char **,
 544               const u_char **);
 545 int   ns_sign(u_char *, int *, int, int, void *,
 546            const u_char *, int, u_char *, int *, time_t);
 547 int   ns_sign2(u_char *, int *, int, int, void *,
 548             const u_char *, int, u_char *, int *, time_t,
 549             u_char **, u_char **);
 550 int   ns_sign_tcp(u_char *, int *, int, int,
 551          ns_tcp_tsig_state *, int);
 552 int   ns_sign_tcp2(u_char *, int *, int, int,
 553           ns_tcp_tsig_state *, int,
 554           u_char **, u_char **);
 555 int   ns_sign_tcp_init(void *, const u_char *, int,
 556           ns_tcp_tsig_state *);
 557 u_char    *ns_find_tsig(u_char *, u_char *);
 558 int   ns_verify(u_char *, int *, void *,
 559              const u_char *, int, u_char *, int *,
 560              time_t *, int);
 561 int   ns_verify_tcp(u_char *, int *, ns_tcp_tsig_state *, int);
 562 int   ns_verify_tcp_init(void *, const u_char *, int,
 563           ns_tcp_tsig_state *);
 564 int   ns_samedomain(const char *, const char *);
 565 int   ns_subdomain(const char *, const char *);
 566 int   ns_makecanon(const char *, char *, size_t);
 567 int   ns_samename(const char *, const char *);
 568 __END_DECLS
 569
 570 #ifdef BIND_4_COMPAT
 571 #include <arpa/nameser_compat.h>
 572 #endif
 573
 574 #endif /* !_ARPA_NAMESER_H_ */