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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 1996-1999 by Internet Software Consortium.
  36  *
  37  * Permission to use, copy, modify, and distribute this software for any
  38  * purpose with or without fee is hereby granted, provided that the above
  39  * copyright notice and this permission notice appear in all copies.
  40  *
  41  * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
  42  * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
  43  * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
  44  * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  45  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  46  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  47  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  48  * SOFTWARE.
  49  */
  50
  51 /*
  52  *      $Id: nameser.h,v 1.2 2001/06/21 08:26:03 marka Exp $
  53  */
  54
  55 #ifndef _ARPA_NAMESER_H_
  56 #define _ARPA_NAMESER_H_
  57
  58 #ifdef __CYGWIN__
  59 #define BSD 199903   /* Used inside the .h file */
  60 #endif
  61
  62 #define BIND_4_COMPAT
  63
  64 #include <sys/param.h>
  65 #if (!defined(BSD)) || (BSD < 199306)
  66 # include <sys/bitypes.h>
  67 #else
  68 # include <sys/types.h>
  69 #endif
  70 #include <sys/cdefs.h>
  71
  72 /*
  73  * Revision information.  This is the release date in YYYYMMDD format.
  74  * It can change every day so the right thing to do with it is use it
  75  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
  76  * compare for equality; rather, use it to determine whether your libbind.a
  77  * contains a new enough lib/nameser/ to support the feature you need.
  78  */
  79
  80 #define __NAMESER       19991006        /* New interface version stamp. */
  81
  82 /*
  83  * Define constants based on RFC 883, RFC 1034, RFC 1035
  84  */
  85 #define NS_PACKETSZ     512     /* maximum packet size */
  86 #define NS_MAXDNAME     1025    /* maximum domain name */
  87 #define NS_MAXCDNAME    255     /* maximum compressed domain name */
  88 #define NS_MAXLABEL     63      /* maximum length of domain label */
  89 #define NS_HFIXEDSZ     12      /* #/bytes of fixed data in header */
  90 #define NS_QFIXEDSZ     4       /* #/bytes of fixed data in query */
  91 #define NS_RRFIXEDSZ    10      /* #/bytes of fixed data in r record */
  92 #define NS_INT32SZ      4       /* #/bytes of data in a u_int32_t */
  93 #define NS_INT16SZ      2       /* #/bytes of data in a u_int16_t */
  94 #define NS_INT8SZ       1       /* #/bytes of data in a u_int8_t */
  95 #define NS_INADDRSZ     4       /* IPv4 T_A */
  96 #define NS_IN6ADDRSZ    16      /* IPv6 T_AAAA */
  97 #define NS_CMPRSFLGS    0xc0    /* Flag bits indicating name compression. */
  98 #define NS_DEFAULTPORT  53      /* For both TCP and UDP. */
  99
 100 /*
 101  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
 102  * in synch with it.
 103  */
 104 typedef enum __ns_sect {
 105         ns_s_qd = 0,            /* Query: Question. */
 106         ns_s_zn = 0,            /* Update: Zone. */
 107         ns_s_an = 1,            /* Query: Answer. */
 108         ns_s_pr = 1,            /* Update: Prerequisites. */
 109         ns_s_ns = 2,            /* Query: Name servers. */
 110         ns_s_ud = 2,            /* Update: Update. */
 111         ns_s_ar = 3,            /* Query|Update: Additional records. */
 112         ns_s_max = 4
 113 } ns_sect;
 114
 115 /*
 116  * This is a message handle.  It is caller allocated and has no dynamic data.
 117  * This structure is intended to be opaque to all but ns_parse.c, thus the
 118  * leading _'s on the member names.  Use the accessor functions, not the _'s.
 119  */
 120 typedef struct __ns_msg {
 121         const u_char    *_msg, *_eom;
 122         u_int16_t       _id, _flags, _counts[ns_s_max];
 123         const u_char    *_sections[ns_s_max];
 124         ns_sect         _sect;
 125         int             _rrnum;
 126         const u_char    *_msg_ptr;
 127 } ns_msg;
 128
 129 /* Private data structure - do not use from outside library. */
 130 struct _ns_flagdata {  int mask, shift;  };
 131 extern struct _ns_flagdata _ns_flagdata[];
 132
 133 /* Accessor macros - this is part of the public interface. */
 134
 135 #define ns_msg_id(handle) ((handle)._id + 0)
 136 #define ns_msg_base(handle) ((handle)._msg + 0)
 137 #define ns_msg_end(handle) ((handle)._eom + 0)
 138 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
 139 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
 140
 141 /*
 142  * This is a parsed record.  It is caller allocated and has no dynamic data.
 143  */
 144 typedef struct __ns_rr {
 145         char            name[NS_MAXDNAME];
 146         u_int16_t       type;
 147         u_int16_t       rr_class;
 148         u_int32_t       ttl;
 149         u_int16_t       rdlength;
 150         const u_char *  rdata;
 151 } ns_rr;
 152
 153 /* Accessor macros - this is part of the public interface. */
 154 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
 155 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
 156 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
 157 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
 158 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
 159 #define ns_rr_rdata(rr) ((rr).rdata + 0)
 160
 161 /*
 162  * These don't have to be in the same order as in the packet flags word,
 163  * and they can even overlap in some cases, but they will need to be kept
 164  * in synch with ns_parse.c:ns_flagdata[].
 165  */
 166 typedef enum __ns_flag {
 167         ns_f_qr,                /* Question/Response. */
 168         ns_f_opcode,            /* Operation code. */
 169         ns_f_aa,                /* Authoritative Answer. */
 170         ns_f_tc,                /* Truncation occurred. */
 171         ns_f_rd,                /* Recursion Desired. */
 172         ns_f_ra,                /* Recursion Available. */
 173         ns_f_z,                 /* MBZ. */
 174         ns_f_ad,                /* Authentic Data (DNSSEC). */
 175         ns_f_cd,                /* Checking Disabled (DNSSEC). */
 176         ns_f_rcode,             /* Response code. */
 177         ns_f_max
 178 } ns_flag;
 179
 180 /*
 181  * Currently defined opcodes.
 182  */
 183 typedef enum __ns_opcode {
 184         ns_o_query = 0,         /* Standard query. */
 185         ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
 186         ns_o_status = 2,        /* Name server status query (unsupported). */
 187                                 /* Opcode 3 is undefined/reserved. */
 188         ns_o_notify = 4,        /* Zone change notification. */
 189         ns_o_update = 5,        /* Zone update message. */
 190         ns_o_max = 6
 191 } ns_opcode;
 192
 193 /*
 194  * Currently defined response codes.
 195  */
 196 typedef enum __ns_rcode {
 197         ns_r_noerror = 0,       /* No error occurred. */
 198         ns_r_formerr = 1,       /* Format error. */
 199         ns_r_servfail = 2,      /* Server failure. */
 200         ns_r_nxdomain = 3,      /* Name error. */
 201         ns_r_notimpl = 4,       /* Unimplemented. */
 202         ns_r_refused = 5,       /* Operation refused. */
 203         /* these are for BIND_UPDATE */
 204         ns_r_yxdomain = 6,      /* Name exists */
 205         ns_r_yxrrset = 7,       /* RRset exists */
 206         ns_r_nxrrset = 8,       /* RRset does not exist */
 207         ns_r_notauth = 9,       /* Not authoritative for zone */
 208         ns_r_notzone = 10,      /* Zone of record different from zone section */
 209         ns_r_max = 11,
 210         /* The following are TSIG extended errors */
 211         ns_r_badsig = 16,
 212         ns_r_badkey = 17,
 213         ns_r_badtime = 18
 214 } ns_rcode;
 215
 216 /* BIND_UPDATE */
 217 typedef enum __ns_update_operation {
 218         ns_uop_delete = 0,
 219         ns_uop_add = 1,
 220         ns_uop_max = 2
 221 } ns_update_operation;
 222
 223 /*
 224  * This structure is used for TSIG authenticated messages
 225  */
 226 struct ns_tsig_key {
 227         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
 228         unsigned char *data;
 229         int len;
 230 };
 231 typedef struct ns_tsig_key ns_tsig_key;
 232
 233 /*
 234  * This structure is used for TSIG authenticated TCP messages
 235  */
 236 struct ns_tcp_tsig_state {
 237         int counter;
 238         struct dst_key *key;
 239         void *ctx;
 240         unsigned char sig[NS_PACKETSZ];
 241         int siglen;
 242 };
 243 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
 244
 245 #define NS_TSIG_FUDGE 300
 246 #define NS_TSIG_TCP_COUNT 100
 247 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
 248
 249 #define NS_TSIG_ERROR_NO_TSIG -10
 250 #define NS_TSIG_ERROR_NO_SPACE -11
 251 #define NS_TSIG_ERROR_FORMERR -12
 252
 253 /*
 254  * Currently defined type values for resources and queries.
 255  */
 256 typedef enum __ns_type {
 257         ns_t_invalid = 0,       /* Cookie. */
 258         ns_t_a = 1,             /* Host address. */
 259         ns_t_ns = 2,            /* Authoritative server. */
 260         ns_t_md = 3,            /* Mail destination. */
 261         ns_t_mf = 4,            /* Mail forwarder. */
 262         ns_t_cname = 5,         /* Canonical name. */
 263         ns_t_soa = 6,           /* Start of authority zone. */
 264         ns_t_mb = 7,            /* Mailbox domain name. */
 265         ns_t_mg = 8,            /* Mail group member. */
 266         ns_t_mr = 9,            /* Mail rename name. */
 267         ns_t_null = 10,         /* Null resource record. */
 268         ns_t_wks = 11,          /* Well known service. */
 269         ns_t_ptr = 12,          /* Domain name pointer. */
 270         ns_t_hinfo = 13,        /* Host information. */
 271         ns_t_minfo = 14,        /* Mailbox information. */
 272         ns_t_mx = 15,           /* Mail routing information. */
 273         ns_t_txt = 16,          /* Text strings. */
 274         ns_t_rp = 17,           /* Responsible person. */
 275         ns_t_afsdb = 18,        /* AFS cell database. */
 276         ns_t_x25 = 19,          /* X_25 calling address. */
 277         ns_t_isdn = 20,         /* ISDN calling address. */
 278         ns_t_rt = 21,           /* Router. */
 279         ns_t_nsap = 22,         /* NSAP address. */
 280         ns_t_nsap_ptr = 23,     /* Reverse NSAP lookup (deprecated). */
 281         ns_t_sig = 24,          /* Security signature. */
 282         ns_t_key = 25,          /* Security key. */
 283         ns_t_px = 26,           /* X.400 mail mapping. */
 284         ns_t_gpos = 27,         /* Geographical position (withdrawn). */
 285         ns_t_aaaa = 28,         /* Ip6 Address. */
 286         ns_t_loc = 29,          /* Location Information. */
 287         ns_t_nxt = 30,          /* Next domain (security). */
 288         ns_t_eid = 31,          /* Endpoint identifier. */
 289         ns_t_nimloc = 32,       /* Nimrod Locator. */
 290         ns_t_srv = 33,          /* Server Selection. */
 291         ns_t_atma = 34,         /* ATM Address */
 292         ns_t_naptr = 35,        /* Naming Authority PoinTeR */
 293         ns_t_kx = 36,           /* Key Exchange */
 294         ns_t_cert = 37,         /* Certification record */
 295         ns_t_a6 = 38,           /* IPv6 address (deprecates AAAA) */
 296         ns_t_dname = 39,        /* Non-terminal DNAME (for IPv6) */
 297         ns_t_sink = 40,         /* Kitchen sink (experimentatl) */
 298         ns_t_opt = 41,          /* EDNS0 option (meta-RR) */
 299         ns_t_tkey = 249,        /* Transaction key */
 300         ns_t_tsig = 250,        /* Transaction signature. */
 301         ns_t_ixfr = 251,        /* Incremental zone transfer. */
 302         ns_t_axfr = 252,        /* Transfer zone of authority. */
 303         ns_t_mailb = 253,       /* Transfer mailbox records. */
 304         ns_t_maila = 254,       /* Transfer mail agent records. */
 305         ns_t_any = 255,         /* Wildcard match. */
 306         ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
 307         ns_t_max = 65536
 308 } ns_type;
 309
 310 /* Exclusively a QTYPE? (not also an RTYPE) */
 311 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 312                       (t) == ns_t_mailb || (t) == ns_t_maila)
 313 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
 314 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 315 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
 316 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 317 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 318 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 319                        (t) == ns_t_zxfr)
 320
 321 /*
 322  * Values for class field
 323  */
 324 typedef enum __ns_class {
 325         ns_c_invalid = 0,       /* Cookie. */
 326         ns_c_in = 1,            /* Internet. */
 327         ns_c_2 = 2,             /* unallocated/unsupported. */
 328         ns_c_chaos = 3,         /* MIT Chaos-net. */
 329         ns_c_hs = 4,            /* MIT Hesiod. */
 330         /* Query class values which do not appear in resource records */
 331         ns_c_none = 254,        /* for prereq. sections in update requests */
 332         ns_c_any = 255,         /* Wildcard match. */
 333         ns_c_max = 65536
 334 } ns_class;
 335
 336 /* DNSSEC constants. */
 337
 338 typedef enum __ns_key_types {
 339         ns_kt_rsa = 1,          /* key type RSA/MD5 */
 340         ns_kt_dh  = 2,          /* Diffie Hellman */
 341         ns_kt_dsa = 3,          /* Digital Signature Standard (MANDATORY) */
 342         ns_kt_private = 254     /* Private key type starts with OID */
 343 } ns_key_types;
 344
 345 typedef enum __ns_cert_types {
 346         cert_t_pkix = 1,        /* PKIX (X.509v3) */
 347         cert_t_spki = 2,        /* SPKI */
 348         cert_t_pgp  = 3,        /* PGP */
 349         cert_t_url  = 253,      /* URL private type */
 350         cert_t_oid  = 254       /* OID private type */
 351 } ns_cert_types;
 352
 353 /* Flags field of the KEY RR rdata. */
 354 #define NS_KEY_TYPEMASK         0xC000  /* Mask for "type" bits */
 355 #define NS_KEY_TYPE_AUTH_CONF   0x0000  /* Key usable for both */
 356 #define NS_KEY_TYPE_CONF_ONLY   0x8000  /* Key usable for confidentiality */
 357 #define NS_KEY_TYPE_AUTH_ONLY   0x4000  /* Key usable for authentication */
 358 #define NS_KEY_TYPE_NO_KEY      0xC000  /* No key usable for either; no key */
 359 /* The type bits can also be interpreted independently, as single bits: */
 360 #define NS_KEY_NO_AUTH          0x8000  /* Key unusable for authentication */
 361 #define NS_KEY_NO_CONF          0x4000  /* Key unusable for confidentiality */
 362 #define NS_KEY_RESERVED2        0x2000  /* Security is *mandatory* if bit=0 */
 363 #define NS_KEY_EXTENDED_FLAGS   0x1000  /* reserved - must be zero */
 364 #define NS_KEY_RESERVED4        0x0800  /* reserved - must be zero */
 365 #define NS_KEY_RESERVED5        0x0400  /* reserved - must be zero */
 366 #define NS_KEY_NAME_TYPE        0x0300  /* these bits determine the type */
 367 #define NS_KEY_NAME_USER        0x0000  /* key is assoc. with user */
 368 #define NS_KEY_NAME_ENTITY      0x0200  /* key is assoc. with entity eg host */
 369 #define NS_KEY_NAME_ZONE        0x0100  /* key is zone key */
 370 #define NS_KEY_NAME_RESERVED    0x0300  /* reserved meaning */
 371 #define NS_KEY_RESERVED8        0x0080  /* reserved - must be zero */
 372 #define NS_KEY_RESERVED9        0x0040  /* reserved - must be zero */
 373 #define NS_KEY_RESERVED10       0x0020  /* reserved - must be zero */
 374 #define NS_KEY_RESERVED11       0x0010  /* reserved - must be zero */
 375 #define NS_KEY_SIGNATORYMASK    0x000F  /* key can sign RR's of same name */
 376 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
 377                                   NS_KEY_RESERVED4 | \
 378                                   NS_KEY_RESERVED5 | \
 379                                   NS_KEY_RESERVED8 | \
 380                                   NS_KEY_RESERVED9 | \
 381                                   NS_KEY_RESERVED10 | \
 382                                   NS_KEY_RESERVED11 )
 383 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */
 384
 385 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
 386 #define NS_ALG_MD5RSA           1       /* MD5 with RSA */
 387 #define NS_ALG_DH               2       /* Diffie Hellman KEY */
 388 #define NS_ALG_DSA              3       /* DSA KEY */
 389 #define NS_ALG_DSS              NS_ALG_DSA
 390 #define NS_ALG_EXPIRE_ONLY      253     /* No alg, no security */
 391 #define NS_ALG_PRIVATE_OID      254     /* Key begins with OID giving alg */
 392
 393 /* Protocol values  */
 394 /* value 0 is reserved */
 395 #define NS_KEY_PROT_TLS         1
 396 #define NS_KEY_PROT_EMAIL       2
 397 #define NS_KEY_PROT_DNSSEC      3
 398 #define NS_KEY_PROT_IPSEC       4
 399 #define NS_KEY_PROT_ANY         255
 400
 401 /* Signatures */
 402 #define NS_MD5RSA_MIN_BITS       512    /* Size of a mod or exp in bits */
 403 #define NS_MD5RSA_MAX_BITS      2552
 404         /* Total of binary mod and exp */
 405 #define NS_MD5RSA_MAX_BYTES     ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
 406         /* Max length of text sig block */
 407 #define NS_MD5RSA_MAX_BASE64    (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
 408 #define NS_MD5RSA_MIN_SIZE      ((NS_MD5RSA_MIN_BITS+7)/8)
 409 #define NS_MD5RSA_MAX_SIZE      ((NS_MD5RSA_MAX_BITS+7)/8)
 410
 411 #define NS_DSA_SIG_SIZE         41
 412 #define NS_DSA_MIN_SIZE         213
 413 #define NS_DSA_MAX_BYTES        405
 414
 415 /* Offsets into SIG record rdata to find various values */
 416 #define NS_SIG_TYPE     0       /* Type flags */
 417 #define NS_SIG_ALG      2       /* Algorithm */
 418 #define NS_SIG_LABELS   3       /* How many labels in name */
 419 #define NS_SIG_OTTL     4       /* Original TTL */
 420 #define NS_SIG_EXPIR    8       /* Expiration time */
 421 #define NS_SIG_SIGNED   12      /* Signature time */
 422 #define NS_SIG_FOOT     16      /* Key footprint */
 423 #define NS_SIG_SIGNER   18      /* Domain name of who signed it */
 424
 425 /* How RR types are represented as bit-flags in NXT records */
 426 #define NS_NXT_BITS 8
 427 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 428 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 429 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 430 #define NS_NXT_MAX 127
 431
 432 /*
 433  * Inline versions of get/put short/long.  Pointer is advanced.
 434  */
 435 #define NS_GET16(s, cp) do { \
 436         register const u_char *t_cp = (const u_char *)(cp); \
 437         (s) = ((u_int16_t)t_cp[0] << 8) \
 438             | ((u_int16_t)t_cp[1]) \
 439             ; \
 440         (cp) += NS_INT16SZ; \
 441 } while (0)
 442
 443 #define NS_GET32(l, cp) do { \
 444         register const u_char *t_cp = (const u_char *)(cp); \
 445         (l) = ((u_int32_t)t_cp[0] << 24) \
 446             | ((u_int32_t)t_cp[1] << 16) \
 447             | ((u_int32_t)t_cp[2] << 8) \
 448             | ((u_int32_t)t_cp[3]) \
 449             ; \
 450         (cp) += NS_INT32SZ; \
 451 } while (0)
 452
 453 #define NS_PUT16(s, cp) do { \
 454         register u_int16_t t_s = (u_int16_t)(s); \
 455         register u_char *t_cp = (u_char *)(cp); \
 456         *t_cp++ = t_s >> 8; \
 457         *t_cp   = t_s; \
 458         (cp) += NS_INT16SZ; \
 459 } while (0)
 460
 461 #define NS_PUT32(l, cp) do { \
 462         register u_int32_t t_l = (u_int32_t)(l); \
 463         register u_char *t_cp = (u_char *)(cp); \
 464         *t_cp++ = t_l >> 24; \
 465         *t_cp++ = t_l >> 16; \
 466         *t_cp++ = t_l >> 8; \
 467         *t_cp   = t_l; \
 468         (cp) += NS_INT32SZ; \
 469 } while (0)
 470
 471 /*
 472  * ANSI C identifier hiding for bind's lib/nameser.
 473  */
 474 #define ns_msg_getflag          __ns_msg_getflag
 475 #define ns_get16                __ns_get16
 476 #define ns_get32                __ns_get32
 477 #define ns_put16                __ns_put16
 478 #define ns_put32                __ns_put32
 479 #define ns_initparse            __ns_initparse
 480 #define ns_skiprr               __ns_skiprr
 481 #define ns_parserr              __ns_parserr
 482 #define ns_sprintrr             __ns_sprintrr
 483 #define ns_sprintrrf            __ns_sprintrrf
 484 #define ns_format_ttl           __ns_format_ttl
 485 #define ns_parse_ttl            __ns_parse_ttl
 486 #define ns_datetosecs           __ns_datetosecs
 487 #define ns_name_ntol            __ns_name_ntol
 488 #define ns_name_ntop            __ns_name_ntop
 489 #define ns_name_pton            __ns_name_pton
 490 #define ns_name_unpack          __ns_name_unpack
 491 #define ns_name_pack            __ns_name_pack
 492 #define ns_name_compress        __ns_name_compress
 493 #define ns_name_uncompress      __ns_name_uncompress
 494 #define ns_name_skip            __ns_name_skip
 495 #define ns_name_rollback        __ns_name_rollback
 496 #define ns_sign                 __ns_sign
 497 #define ns_sign_tcp             __ns_sign_tcp
 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 #define ns_samedomain           __ns_samedomain
 504 #define ns_subdomain            __ns_subdomain
 505 #define ns_makecanon            __ns_makecanon
 506 #define ns_samename             __ns_samename
 507
 508 __BEGIN_DECLS
 509 int             ns_msg_getflag __P((ns_msg, int));
 510 u_int           ns_get16 __P((const u_char *));
 511 u_long          ns_get32 __P((const u_char *));
 512 void            ns_put16 __P((u_int, u_char *));
 513 void            ns_put32 __P((u_long, u_char *));
 514 int             ns_initparse __P((const u_char *, int, ns_msg *));
 515 int             ns_skiprr __P((const u_char *, const u_char *, ns_sect, int));
 516 int             ns_parserr __P((ns_msg *, ns_sect, int, ns_rr *));
 517 int             ns_sprintrr __P((const ns_msg *, const ns_rr *,
 518                                  const char *, const char *, char *, size_t));
 519 int             ns_sprintrrf __P((const u_char *, size_t, const char *,
 520                                   ns_class, ns_type, u_long, const u_char *,
 521                                   size_t, const char *, const char *,
 522                                   char *, size_t));
 523 int             ns_format_ttl __P((u_long, char *, size_t));
 524 int             ns_parse_ttl __P((const char *, u_long *));
 525 u_int32_t       ns_datetosecs __P((const char *cp, int *errp));
 526 int             ns_name_ntol __P((const u_char *, u_char *, size_t));
 527 int             ns_name_ntop __P((const u_char *, char *, size_t));
 528 int             ns_name_pton __P((const char *, u_char *, size_t));
 529 int             ns_name_unpack __P((const u_char *, const u_char *,
 530                                     const u_char *, u_char *, size_t));
 531 int             ns_name_pack __P((const u_char *, u_char *, int,
 532                                   const u_char **, const u_char **));
 533 int             ns_name_uncompress __P((const u_char *, const u_char *,
 534                                         const u_char *, char *, size_t));
 535 int             ns_name_compress __P((const char *, u_char *, size_t,
 536                                       const u_char **, const u_char **));
 537 int             ns_name_skip __P((const u_char **, const u_char *));
 538 void            ns_name_rollback __P((const u_char *, const u_char **,
 539                                       const u_char **));
 540 int             ns_sign __P((u_char *, int *, int, int, void *,
 541                              const u_char *, int, u_char *, int *, time_t));
 542 int             ns_sign_tcp __P((u_char *, int *, int, int,
 543                                  ns_tcp_tsig_state *, int));
 544 int             ns_sign_tcp_init __P((void *, const u_char *, int,
 545                                         ns_tcp_tsig_state *));
 546 u_char          *ns_find_tsig __P((u_char *, u_char *));
 547 int             ns_verify __P((u_char *, int *, void *,
 548                                const u_char *, int, u_char *, int *,
 549                                time_t *, int));
 550 int             ns_verify_tcp __P((u_char *, int *, ns_tcp_tsig_state *, int));
 551 int             ns_verify_tcp_init __P((void *, const u_char *, int,
 552                                         ns_tcp_tsig_state *));
 553 int             ns_samedomain __P((const char *, const char *));
 554 int             ns_subdomain __P((const char *, const char *));
 555 int             ns_makecanon __P((const char *, char *, size_t));
 556 int             ns_samename __P((const char *, const char *));
 557 __END_DECLS
 558
 559 #ifdef BIND_4_COMPAT
 560 #include <arpa/nameser_compat.h>
 561 #endif
 562
 563 #endif /* !_ARPA_NAMESER_H_ */