include/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) 1996-1999 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
  47 /*
  48  *      $Id: nameser.h,v 1.7.18.2 2008/04/03 23:15:15 marka Exp $
  49  * $FreeBSD: src/include/arpa/nameser.h,v 1.21 2008/12/14 19:39:53 ume Exp $
  50  * $DragonFly: src/include/arpa/nameser.h,v 1.5 2007/04/18 18:39:11 swildner 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 #include <sys/types.h>
  60 #include <sys/cdefs.h>
  61
  62 /*
  63  * Revision information.  This is the release date in YYYYMMDD format.
  64  * It can change every day so the right thing to do with it is use it
  65  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
  66  * compare for equality; rather, use it to determine whether your libbind.a
  67  * contains a new enough lib/nameser/ to support the feature you need.
  68  */
  69
  70 #define __NAMESER       19991006        /* New interface version stamp. */
  71 /*
  72  * Define constants based on RFC 883, RFC 1034, RFC 1035
  73  */
  74 #define NS_PACKETSZ     512     /* default UDP packet size */
  75 #define NS_MAXDNAME     1025    /* maximum domain name */
  76 #define NS_MAXMSG       65535   /* maximum message size */
  77 #define NS_MAXCDNAME    255     /* maximum compressed domain name */
  78 #define NS_MAXLABEL     63      /* maximum length of domain label */
  79 #define NS_HFIXEDSZ     12      /* #/bytes of fixed data in header */
  80 #define NS_QFIXEDSZ     4       /* #/bytes of fixed data in query */
  81 #define NS_RRFIXEDSZ    10      /* #/bytes of fixed data in r record */
  82 #define NS_INT32SZ      4       /* #/bytes of data in a u_int32_t */
  83 #define NS_INT16SZ      2       /* #/bytes of data in a u_int16_t */
  84 #define NS_INT8SZ       1       /* #/bytes of data in a u_int8_t */
  85 #define NS_INADDRSZ     4       /* IPv4 T_A */
  86 #define NS_IN6ADDRSZ    16      /* IPv6 T_AAAA */
  87 #define NS_CMPRSFLGS    0xc0    /* Flag bits indicating name compression. */
  88 #define NS_DEFAULTPORT  53      /* For both TCP and UDP. */
  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_char    *_msg, *_eom;
 111         u_int16_t       _id, _flags, _counts[ns_s_max];
 112         const u_char    *_sections[ns_s_max];
 113         ns_sect         _sect;
 114         int             _rrnum;
 115         const u_char    *_msg_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
 124 #define ns_msg_id(handle) ((handle)._id + 0)
 125 #define ns_msg_base(handle) ((handle)._msg + 0)
 126 #define ns_msg_end(handle) ((handle)._eom + 0)
 127 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
 128 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
 129
 130 /*
 131  * This is a parsed record.  It is caller allocated and has no dynamic data.
 132  */
 133 typedef struct __ns_rr {
 134         char            name[NS_MAXDNAME];
 135         u_int16_t       type;
 136         u_int16_t       rr_class;
 137         u_int32_t       ttl;
 138         u_int16_t       rdlength;
 139         const u_char    *rdata;
 140 } ns_rr;
 141
 142 /* Accessor macros - this is part of the public interface. */
 143 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
 144 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
 145 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
 146 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
 147 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
 148 #define ns_rr_rdata(rr) ((rr).rdata + 0)
 149
 150 /*
 151  * These don't have to be in the same order as in the packet flags word,
 152  * and they can even overlap in some cases, but they will need to be kept
 153  * in synch with ns_parse.c:ns_flagdata[].
 154  */
 155 typedef enum __ns_flag {
 156         ns_f_qr,                /* Question/Response. */
 157         ns_f_opcode,            /* Operation code. */
 158         ns_f_aa,                /* Authoritative Answer. */
 159         ns_f_tc,                /* Truncation occurred. */
 160         ns_f_rd,                /* Recursion Desired. */
 161         ns_f_ra,                /* Recursion Available. */
 162         ns_f_z,                 /* MBZ. */
 163         ns_f_ad,                /* Authentic Data (DNSSEC). */
 164         ns_f_cd,                /* Checking Disabled (DNSSEC). */
 165         ns_f_rcode,             /* Response code. */
 166         ns_f_max
 167 } ns_flag;
 168
 169 /*
 170  * Currently defined opcodes.
 171  */
 172 typedef enum __ns_opcode {
 173         ns_o_query = 0,         /* Standard query. */
 174         ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
 175         ns_o_status = 2,        /* Name server status query (unsupported). */
 176                                 /* Opcode 3 is undefined/reserved. */
 177         ns_o_notify = 4,        /* Zone change notification. */
 178         ns_o_update = 5,        /* Zone update message. */
 179         ns_o_max = 6
 180 } ns_opcode;
 181
 182 /*
 183  * Currently defined response codes.
 184  */
 185 typedef enum __ns_rcode {
 186         ns_r_noerror = 0,       /* No error occurred. */
 187         ns_r_formerr = 1,       /* Format error. */
 188         ns_r_servfail = 2,      /* Server failure. */
 189         ns_r_nxdomain = 3,      /* Name error. */
 190         ns_r_notimpl = 4,       /* Unimplemented. */
 191         ns_r_refused = 5,       /* Operation refused. */
 192         /* these are for BIND_UPDATE */
 193         ns_r_yxdomain = 6,      /* Name exists */
 194         ns_r_yxrrset = 7,       /* RRset exists */
 195         ns_r_nxrrset = 8,       /* RRset does not exist */
 196         ns_r_notauth = 9,       /* Not authoritative for zone */
 197         ns_r_notzone = 10,      /* Zone of record different from zone section */
 198         ns_r_max = 11,
 199         /* The following are EDNS extended rcodes */
 200         ns_r_badvers = 16,
 201         /* The following are TSIG 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         int 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         int 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_apl = 42,          /* Address prefix list (RFC3123) */
 291         ns_t_tkey = 249,        /* Transaction key */
 292         ns_t_tsig = 250,        /* Transaction signature. */
 293         ns_t_ixfr = 251,        /* Incremental zone transfer. */
 294         ns_t_axfr = 252,        /* Transfer zone of authority. */
 295         ns_t_mailb = 253,       /* Transfer mailbox records. */
 296         ns_t_maila = 254,       /* Transfer mail agent records. */
 297         ns_t_any = 255,         /* Wildcard match. */
 298         ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
 299         ns_t_max = 65536
 300 } ns_type;
 301
 302 /* Exclusively a QTYPE? (not also an RTYPE) */
 303 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 304                       (t) == ns_t_mailb || (t) == ns_t_maila)
 305 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
 306 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 307 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
 308 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 309 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 310 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 311                        (t) == ns_t_zxfr)
 312
 313 /*
 314  * Values for class field
 315  */
 316 typedef enum __ns_class {
 317         ns_c_invalid = 0,       /* Cookie. */
 318         ns_c_in = 1,            /* Internet. */
 319         ns_c_2 = 2,             /* unallocated/unsupported. */
 320         ns_c_chaos = 3,         /* MIT Chaos-net. */
 321         ns_c_hs = 4,            /* MIT Hesiod. */
 322         /* Query class values which do not appear in resource records */
 323         ns_c_none = 254,        /* for prereq. sections in update requests */
 324         ns_c_any = 255,         /* Wildcard match. */
 325         ns_c_max = 65536
 326 } ns_class;
 327
 328 /* DNSSEC constants. */
 329
 330 typedef enum __ns_key_types {
 331         ns_kt_rsa = 1,          /* key type RSA/MD5 */
 332         ns_kt_dh  = 2,          /* Diffie Hellman */
 333         ns_kt_dsa = 3,          /* Digital Signature Standard (MANDATORY) */
 334         ns_kt_private = 254     /* Private key type starts with OID */
 335 } ns_key_types;
 336
 337 typedef enum __ns_cert_types {
 338         cert_t_pkix = 1,        /* PKIX (X.509v3) */
 339         cert_t_spki = 2,        /* SPKI */
 340         cert_t_pgp  = 3,        /* PGP */
 341         cert_t_url  = 253,      /* URL private type */
 342         cert_t_oid  = 254       /* OID private type */
 343 } ns_cert_types;
 344
 345 /* Flags field of the KEY RR rdata. */
 346 #define NS_KEY_TYPEMASK         0xC000  /* Mask for "type" bits */
 347 #define NS_KEY_TYPE_AUTH_CONF   0x0000  /* Key usable for both */
 348 #define NS_KEY_TYPE_CONF_ONLY   0x8000  /* Key usable for confidentiality */
 349 #define NS_KEY_TYPE_AUTH_ONLY   0x4000  /* Key usable for authentication */
 350 #define NS_KEY_TYPE_NO_KEY      0xC000  /* No key usable for either; no key */
 351 /* The type bits can also be interpreted independently, as single bits: */
 352 #define NS_KEY_NO_AUTH          0x8000  /* Key unusable for authentication */
 353 #define NS_KEY_NO_CONF          0x4000  /* Key unusable for confidentiality */
 354 #define NS_KEY_RESERVED2        0x2000  /* Security is *mandatory* if bit=0 */
 355 #define NS_KEY_EXTENDED_FLAGS   0x1000  /* reserved - must be zero */
 356 #define NS_KEY_RESERVED4        0x0800  /* reserved - must be zero */
 357 #define NS_KEY_RESERVED5        0x0400  /* reserved - must be zero */
 358 #define NS_KEY_NAME_TYPE        0x0300  /* these bits determine the type */
 359 #define NS_KEY_NAME_USER        0x0000  /* key is assoc. with user */
 360 #define NS_KEY_NAME_ENTITY      0x0200  /* key is assoc. with entity eg host */
 361 #define NS_KEY_NAME_ZONE        0x0100  /* key is zone key */
 362 #define NS_KEY_NAME_RESERVED    0x0300  /* reserved meaning */
 363 #define NS_KEY_RESERVED8        0x0080  /* reserved - must be zero */
 364 #define NS_KEY_RESERVED9        0x0040  /* reserved - must be zero */
 365 #define NS_KEY_RESERVED10       0x0020  /* reserved - must be zero */
 366 #define NS_KEY_RESERVED11       0x0010  /* reserved - must be zero */
 367 #define NS_KEY_SIGNATORYMASK    0x000F  /* key can sign RR's of same name */
 368 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
 369                                   NS_KEY_RESERVED4 | \
 370                                   NS_KEY_RESERVED5 | \
 371                                   NS_KEY_RESERVED8 | \
 372                                   NS_KEY_RESERVED9 | \
 373                                   NS_KEY_RESERVED10 | \
 374                                   NS_KEY_RESERVED11 )
 375 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */
 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 /* 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      4096
 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 /* How RR types are represented as bit-flags in NXT records */
 415 #define NS_NXT_BITS 8
 416 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 417 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 418 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 419 #define NS_NXT_MAX 127
 420
 421 /*
 422  * EDNS0 extended flags and option codes, host order.
 423  */
 424 #define NS_OPT_DNSSEC_OK        0x8000U
 425 #define NS_OPT_NSID             3
 426
 427 /*
 428  * Inline versions of get/put short/long.  Pointer is advanced.
 429  */
 430 #define NS_GET16(s, cp) do { \
 431         const u_char *t_cp = (const u_char *)(cp); \
 432         (s) = ((u_int16_t)t_cp[0] << 8) \
 433             | ((u_int16_t)t_cp[1]) \
 434             ; \
 435         (cp) += NS_INT16SZ; \
 436 } while (0)
 437
 438 #define NS_GET32(l, cp) do { \
 439         const u_char *t_cp = (const u_char *)(cp); \
 440         (l) = ((u_int32_t)t_cp[0] << 24) \
 441             | ((u_int32_t)t_cp[1] << 16) \
 442             | ((u_int32_t)t_cp[2] << 8) \
 443             | ((u_int32_t)t_cp[3]) \
 444             ; \
 445         (cp) += NS_INT32SZ; \
 446 } while (0)
 447
 448 #define NS_PUT16(s, cp) do { \
 449         u_int16_t t_s = (u_int16_t)(s); \
 450         u_char *t_cp = (u_char *)(cp); \
 451         *t_cp++ = t_s >> 8; \
 452         *t_cp   = t_s; \
 453         (cp) += NS_INT16SZ; \
 454 } while (0)
 455
 456 #define NS_PUT32(l, cp) do { \
 457         u_int32_t t_l = (u_int32_t)(l); \
 458         u_char *t_cp = (u_char *)(cp); \
 459         *t_cp++ = t_l >> 24; \
 460         *t_cp++ = t_l >> 16; \
 461         *t_cp++ = t_l >> 8; \
 462         *t_cp   = t_l; \
 463         (cp) += NS_INT32SZ; \
 464 } while (0)
 465
 466 /*
 467  * ANSI C identifier hiding for bind's lib/nameser.
 468  */
 469 #define ns_msg_getflag          __ns_msg_getflag
 470 #define ns_get16                __ns_get16
 471 #define ns_get32                __ns_get32
 472 #define ns_put16                __ns_put16
 473 #define ns_put32                __ns_put32
 474 #define ns_initparse            __ns_initparse
 475 #define ns_skiprr               __ns_skiprr
 476 #define ns_parserr              __ns_parserr
 477 #define ns_sprintrr             __ns_sprintrr
 478 #define ns_sprintrrf            __ns_sprintrrf
 479 #define ns_format_ttl           __ns_format_ttl
 480 #define ns_parse_ttl            __ns_parse_ttl
 481 #if 0
 482 #define ns_datetosecs           __ns_datetosecs
 483 #endif
 484 #define ns_name_ntol            __ns_name_ntol
 485 #define ns_name_ntop            __ns_name_ntop
 486 #define ns_name_pton            __ns_name_pton
 487 #define ns_name_unpack          __ns_name_unpack
 488 #define ns_name_pack            __ns_name_pack
 489 #define ns_name_compress        __ns_name_compress
 490 #define ns_name_uncompress      __ns_name_uncompress
 491 #define ns_name_skip            __ns_name_skip
 492 #define ns_name_rollback        __ns_name_rollback
 493 #if 0
 494 #define ns_sign                 __ns_sign
 495 #define ns_sign2                __ns_sign2
 496 #define ns_sign_tcp             __ns_sign_tcp
 497 #define ns_sign_tcp2            __ns_sign_tcp2
 498 #define ns_sign_tcp_init        __ns_sign_tcp_init
 499 #define ns_find_tsig            __ns_find_tsig
 500 #define ns_verify               __ns_verify
 501 #define ns_verify_tcp           __ns_verify_tcp
 502 #define ns_verify_tcp_init      __ns_verify_tcp_init
 503 #endif
 504 #define ns_samedomain           __ns_samedomain
 505 #if 0
 506 #define ns_subdomain            __ns_subdomain
 507 #endif
 508 #define ns_makecanon            __ns_makecanon
 509 #define ns_samename             __ns_samename
 510
 511 __BEGIN_DECLS
 512 int             ns_msg_getflag(ns_msg, int);
 513 u_int           ns_get16(const u_char *);
 514 u_long          ns_get32(const u_char *);
 515 void            ns_put16(u_int, u_char *);
 516 void            ns_put32(u_long, u_char *);
 517 int             ns_initparse(const u_char *, int, ns_msg *);
 518 int             ns_skiprr(const u_char *, const u_char *, ns_sect, int);
 519 int             ns_parserr(ns_msg *, ns_sect, int, ns_rr *);
 520 int             ns_sprintrr(const ns_msg *, const ns_rr *,
 521                             const char *, const char *, char *, size_t);
 522 int             ns_sprintrrf(const u_char *, size_t, const char *,
 523                              ns_class, ns_type, u_long, const u_char *,
 524                              size_t, const char *, const char *,
 525                              char *, size_t);
 526 int             ns_format_ttl(u_long, char *, size_t);
 527 int             ns_parse_ttl(const char *, u_long *);
 528 #if 0
 529 u_int32_t       ns_datetosecs(const char *cp, int *errp);
 530 #endif
 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 #if 0
 546 int             ns_sign(u_char *, int *, int, int, void *,
 547                         const u_char *, int, u_char *, int *, time_t);
 548 int             ns_sign2(u_char *, int *, int, int, void *,
 549                          const u_char *, int, u_char *, int *, time_t,
 550                          u_char **, u_char **);
 551 int             ns_sign_tcp(u_char *, int *, int, int,
 552                             ns_tcp_tsig_state *, int);
 553 int             ns_sign_tcp2(u_char *, int *, int, int,
 554                              ns_tcp_tsig_state *, int,
 555                              u_char **, u_char **);
 556 int             ns_sign_tcp_init(void *, const u_char *, int,
 557                                  ns_tcp_tsig_state *);
 558 u_char          *ns_find_tsig(u_char *, u_char *);
 559 int             ns_verify(u_char *, int *, void *,
 560                           const u_char *, int, u_char *, int *,
 561                           time_t *, int);
 562 int             ns_verify_tcp(u_char *, int *, ns_tcp_tsig_state *, int);
 563 int             ns_verify_tcp_init(void *, const u_char *, int,
 564                                    ns_tcp_tsig_state *);
 565 #endif
 566 int             ns_samedomain(const char *, const char *);
 567 #if 0
 568 int             ns_subdomain(const char *, const char *);
 569 #endif
 570 int             ns_makecanon(const char *, char *, size_t);
 571 int             ns_samename(const char *, const char *);
 572 __END_DECLS
 573
 574 #ifdef BIND_4_COMPAT
 575 #include <arpa/nameser_compat.h>
 576 #endif
 577
 578 #endif /* !_ARPA_NAMESER_H_ */