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 1.1 2006/03/01 19:01:36 majka Exp $
  53  */
  54
  55 #ifndef _NAMESER_9_H_
  56 #define _NAMESER_9_H_
  57
  58 #ifdef BIND_8_COMPAT
  59 #include <arpa/nameser_compat.h>
  60 #endif
  61
  62 #include <sys/param.h>
  63 #if (!defined(BSD)) || (BSD < 199306)
  64 # include <sys/bitypes.h>
  65 #else
  66 # include <sys/types.h>
  67 #endif
  68 #include <sys/cdefs.h>
  69
  70 /*
  71  * Revision information.  This is the release date in YYYYMMDD format.
  72  * It can change every day so the right thing to do with it is use it
  73  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
  74  * compare for equality; rather, use it to determine whether your libbind.a
  75  * contains a new enough lib/nameser/ to support the feature you need.
  76  */
  77
  78 #define __NAMESER       19991006        /* New interface version stamp. */
  79
  80 /*
  81  * Define constants based on RFC 883, RFC 1034, RFC 1035
  82  */
  83 #define NS_PACKETSZ     512     /* maximum packet size */
  84 #define NS_MAXDNAME     1025    /* maximum domain name */
  85 #define NS_MAXCDNAME    255     /* maximum compressed domain name */
  86 #define NS_MAXLABEL     63      /* maximum length of domain label */
  87 #define NS_HFIXEDSZ     12      /* #/bytes of fixed data in header */
  88 #define NS_QFIXEDSZ     4       /* #/bytes of fixed data in query */
  89 #define NS_RRFIXEDSZ    10      /* #/bytes of fixed data in r record */
  90 #define NS_INT32SZ      4       /* #/bytes of data in a u_int32_t */
  91 #define NS_INT16SZ      2       /* #/bytes of data in a u_int16_t */
  92 #define NS_INT8SZ       1       /* #/bytes of data in a u_int8_t */
  93 #define NS_INADDRSZ     4       /* IPv4 T_A */
  94 #define NS_IN6ADDRSZ    16      /* IPv6 T_AAAA */
  95 #define NS_CMPRSFLGS    0xc0    /* Flag bits indicating name compression. */
  96 #define NS_DEFAULTPORT  53      /* For both TCP and UDP. */
  97
  98 /*
  99  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
 100  * in synch with it.
 101  */
 102 #define ns_sect res_9_ns_sect
 103 typedef enum __ns_sect {
 104         ns_s_qd = 0,            /* Query: Question. */
 105         ns_s_zn = 0,            /* Update: Zone. */
 106         ns_s_an = 1,            /* Query: Answer. */
 107         ns_s_pr = 1,            /* Update: Prerequisites. */
 108         ns_s_ns = 2,            /* Query: Name servers. */
 109         ns_s_ud = 2,            /* Update: Update. */
 110         ns_s_ar = 3,            /* Query|Update: Additional records. */
 111         ns_s_max = 4
 112 } ns_sect;
 113
 114 /*
 115  * This is a message handle.  It is caller allocated and has no dynamic data.
 116  * This structure is intended to be opaque to all but ns_parse.c, thus the
 117  * leading _'s on the member names.  Use the accessor functions, not the _'s.
 118  */
 119 #define ns_msg res_9_ns_msg
 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 #define _ns_flagdata _res_9_ns_flagdata
 131 struct _ns_flagdata {  int mask, shift;  };
 132 extern struct _ns_flagdata _ns_flagdata[];
 133
 134 /* Accessor macros - this is part of the public interface. */
 135
 136 #define ns_msg_id(handle) ((handle)._id + 0)
 137 #define ns_msg_base(handle) ((handle)._msg + 0)
 138 #define ns_msg_end(handle) ((handle)._eom + 0)
 139 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
 140 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
 141
 142 /*
 143  * This is a parsed record.  It is caller allocated and has no dynamic data.
 144  */
 145 #define ns_rr res_9_ns_rr
 146
 147 typedef struct __ns_rr {
 148         char            name[NS_MAXDNAME];
 149         u_int16_t       type;
 150         u_int16_t       rr_class;
 151         u_int32_t       ttl;
 152         u_int16_t       rdlength;
 153         const u_char *  rdata;
 154 } ns_rr;
 155
 156 /* Accessor macros - this is part of the public interface. */
 157 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
 158 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
 159 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
 160 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
 161 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
 162 #define ns_rr_rdata(rr) ((rr).rdata + 0)
 163
 164 /*
 165  * These don't have to be in the same order as in the packet flags word,
 166  * and they can even overlap in some cases, but they will need to be kept
 167  * in synch with ns_parse.c:ns_flagdata[].
 168  */
 169 #define ns_flag res_9_ns_flag
 170 typedef enum __ns_flag {
 171         ns_f_qr,                /* Question/Response. */
 172         ns_f_opcode,            /* Operation code. */
 173         ns_f_aa,                /* Authoritative Answer. */
 174         ns_f_tc,                /* Truncation occurred. */
 175         ns_f_rd,                /* Recursion Desired. */
 176         ns_f_ra,                /* Recursion Available. */
 177         ns_f_z,                 /* MBZ. */
 178         ns_f_ad,                /* Authentic Data (DNSSEC). */
 179         ns_f_cd,                /* Checking Disabled (DNSSEC). */
 180         ns_f_rcode,             /* Response code. */
 181         ns_f_max
 182 } ns_flag;
 183
 184 /*
 185  * Currently defined opcodes.
 186  */
 187 #define ns_opcode res_9_ns_opcode
 188 typedef enum __ns_opcode {
 189         ns_o_query = 0,         /* Standard query. */
 190         ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
 191         ns_o_status = 2,        /* Name server status query (unsupported). */
 192                                 /* Opcode 3 is undefined/reserved. */
 193         ns_o_notify = 4,        /* Zone change notification. */
 194         ns_o_update = 5,        /* Zone update message. */
 195         ns_o_max = 6
 196 } ns_opcode;
 197
 198 /*
 199  * Currently defined response codes.
 200  */
 201 #define ns_rcode res_9_ns_rcode
 202 typedef enum __ns_rcode {
 203         ns_r_noerror = 0,       /* No error occurred. */
 204         ns_r_formerr = 1,       /* Format error. */
 205         ns_r_servfail = 2,      /* Server failure. */
 206         ns_r_nxdomain = 3,      /* Name error. */
 207         ns_r_notimpl = 4,       /* Unimplemented. */
 208         ns_r_refused = 5,       /* Operation refused. */
 209         /* these are for BIND_UPDATE */
 210         ns_r_yxdomain = 6,      /* Name exists */
 211         ns_r_yxrrset = 7,       /* RRset exists */
 212         ns_r_nxrrset = 8,       /* RRset does not exist */
 213         ns_r_notauth = 9,       /* Not authoritative for zone */
 214         ns_r_notzone = 10,      /* Zone of record different from zone section */
 215         ns_r_max = 11,
 216         /* The following are EDNS extended rcodes */
 217         ns_r_badvers = 16,
 218         /* The following are TSIG errors */
 219         ns_r_badsig = 16,
 220         ns_r_badkey = 17,
 221         ns_r_badtime = 18
 222 } ns_rcode;
 223
 224 /* BIND_UPDATE */
 225 #define ns_update_operation res_9_ns_update_operation
 226 typedef enum __ns_update_operation {
 227         ns_uop_delete = 0,
 228         ns_uop_add = 1,
 229         ns_uop_max = 2
 230 } ns_update_operation;
 231
 232 /*
 233  * This structure is used for TSIG authenticated messages
 234  */
 235 #define ns_tsig_key res_9_ns_tsig_key
 236 struct ns_tsig_key {
 237         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
 238         unsigned char *data;
 239         int len;
 240 };
 241 typedef struct ns_tsig_key ns_tsig_key;
 242
 243 /*
 244  * This structure is used for TSIG authenticated TCP messages
 245  */
 246 #define ns_tcp_tsig_state res_9_ns_tcp_tsig_state
 247 struct ns_tcp_tsig_state {
 248         int counter;
 249         struct dst_key *key;
 250         void *ctx;
 251         unsigned char sig[NS_PACKETSZ];
 252         int siglen;
 253 };
 254 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
 255
 256 #define NS_TSIG_FUDGE 300
 257 #define NS_TSIG_TCP_COUNT 100
 258 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
 259
 260 #define NS_TSIG_ERROR_NO_TSIG -10
 261 #define NS_TSIG_ERROR_NO_SPACE -11
 262 #define NS_TSIG_ERROR_FORMERR -12
 263
 264 /*
 265  * Currently defined type values for resources and queries.
 266  */
 267 #define ns_typw res_9_ns_type
 268 typedef enum __ns_type {
 269         ns_t_invalid = 0,       /* Cookie. */
 270         ns_t_a = 1,             /* Host address. */
 271         ns_t_ns = 2,            /* Authoritative server. */
 272         ns_t_md = 3,            /* Mail destination. */
 273         ns_t_mf = 4,            /* Mail forwarder. */
 274         ns_t_cname = 5,         /* Canonical name. */
 275         ns_t_soa = 6,           /* Start of authority zone. */
 276         ns_t_mb = 7,            /* Mailbox domain name. */
 277         ns_t_mg = 8,            /* Mail group member. */
 278         ns_t_mr = 9,            /* Mail rename name. */
 279         ns_t_null = 10,         /* Null resource record. */
 280         ns_t_wks = 11,          /* Well known service. */
 281         ns_t_ptr = 12,          /* Domain name pointer. */
 282         ns_t_hinfo = 13,        /* Host information. */
 283         ns_t_minfo = 14,        /* Mailbox information. */
 284         ns_t_mx = 15,           /* Mail routing information. */
 285         ns_t_txt = 16,          /* Text strings. */
 286         ns_t_rp = 17,           /* Responsible person. */
 287         ns_t_afsdb = 18,        /* AFS cell database. */
 288         ns_t_x25 = 19,          /* X_25 calling address. */
 289         ns_t_isdn = 20,         /* ISDN calling address. */
 290         ns_t_rt = 21,           /* Router. */
 291         ns_t_nsap = 22,         /* NSAP address. */
 292         ns_t_nsap_ptr = 23,     /* Reverse NSAP lookup (deprecated). */
 293         ns_t_sig = 24,          /* Security signature. */
 294         ns_t_key = 25,          /* Security key. */
 295         ns_t_px = 26,           /* X.400 mail mapping. */
 296         ns_t_gpos = 27,         /* Geographical position (withdrawn). */
 297         ns_t_aaaa = 28,         /* Ip6 Address. */
 298         ns_t_loc = 29,          /* Location Information. */
 299         ns_t_nxt = 30,          /* Next domain (security). */
 300         ns_t_eid = 31,          /* Endpoint identifier. */
 301         ns_t_nimloc = 32,       /* Nimrod Locator. */
 302         ns_t_srv = 33,          /* Server Selection. */
 303         ns_t_atma = 34,         /* ATM Address */
 304         ns_t_naptr = 35,        /* Naming Authority PoinTeR */
 305         ns_t_kx = 36,           /* Key Exchange */
 306         ns_t_cert = 37,         /* Certification record */
 307         ns_t_a6 = 38,           /* IPv6 address (deprecates AAAA) */
 308         ns_t_dname = 39,        /* Non-terminal DNAME (for IPv6) */
 309         ns_t_sink = 40,         /* Kitchen sink (experimentatl) */
 310         ns_t_opt = 41,          /* EDNS0 option (meta-RR) */
 311         ns_t_tkey = 249,        /* Transaction key */
 312         ns_t_tsig = 250,        /* Transaction signature. */
 313         ns_t_ixfr = 251,        /* Incremental zone transfer. */
 314         ns_t_axfr = 252,        /* Transfer zone of authority. */
 315         ns_t_mailb = 253,       /* Transfer mailbox records. */
 316         ns_t_maila = 254,       /* Transfer mail agent records. */
 317         ns_t_any = 255,         /* Wildcard match. */
 318         ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
 319         ns_t_max = 65536
 320 } ns_type;
 321
 322 /* Exclusively a QTYPE? (not also an RTYPE) */
 323 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 324                       (t) == ns_t_mailb || (t) == ns_t_maila)
 325 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
 326 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 327 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
 328 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 329 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 330 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 331                        (t) == ns_t_zxfr)
 332
 333 /*
 334  * Values for class field
 335  */
 336 #define ns_class res_9_ns_class
 337 typedef enum __ns_class {
 338         ns_c_invalid = 0,       /* Cookie. */
 339         ns_c_in = 1,            /* Internet. */
 340         ns_c_2 = 2,             /* unallocated/unsupported. */
 341         ns_c_chaos = 3,         /* MIT Chaos-net. */
 342         ns_c_hs = 4,            /* MIT Hesiod. */
 343         /* Query class values which do not appear in resource records */
 344         ns_c_none = 254,        /* for prereq. sections in update requests */
 345         ns_c_any = 255,         /* Wildcard match. */
 346         ns_c_max = 65536
 347 } ns_class;
 348
 349 /* DNSSEC constants. */
 350
 351 #define ns_key_types res_9_ns_key_types
 352 typedef enum __ns_key_types {
 353         ns_kt_rsa = 1,          /* key type RSA/MD5 */
 354         ns_kt_dh  = 2,          /* Diffie Hellman */
 355         ns_kt_dsa = 3,          /* Digital Signature Standard (MANDATORY) */
 356         ns_kt_private = 254     /* Private key type starts with OID */
 357 } ns_key_types;
 358
 359 #define ns_cert_types res_9_ns_cert_types
 360 typedef enum __ns_cert_types {
 361         cert_t_pkix = 1,        /* PKIX (X.509v3) */
 362         cert_t_spki = 2,        /* SPKI */
 363         cert_t_pgp  = 3,        /* PGP */
 364         cert_t_url  = 253,      /* URL private type */
 365         cert_t_oid  = 254       /* OID private type */
 366 } ns_cert_types;
 367
 368 /* Flags field of the KEY RR rdata. */
 369 #define NS_KEY_TYPEMASK         0xC000  /* Mask for "type" bits */
 370 #define NS_KEY_TYPE_AUTH_CONF   0x0000  /* Key usable for both */
 371 #define NS_KEY_TYPE_CONF_ONLY   0x8000  /* Key usable for confidentiality */
 372 #define NS_KEY_TYPE_AUTH_ONLY   0x4000  /* Key usable for authentication */
 373 #define NS_KEY_TYPE_NO_KEY      0xC000  /* No key usable for either; no key */
 374 /* The type bits can also be interpreted independently, as single bits: */
 375 #define NS_KEY_NO_AUTH          0x8000  /* Key unusable for authentication */
 376 #define NS_KEY_NO_CONF          0x4000  /* Key unusable for confidentiality */
 377 #define NS_KEY_RESERVED2        0x2000  /* Security is *mandatory* if bit=0 */
 378 #define NS_KEY_EXTENDED_FLAGS   0x1000  /* reserved - must be zero */
 379 #define NS_KEY_RESERVED4        0x0800  /* reserved - must be zero */
 380 #define NS_KEY_RESERVED5        0x0400  /* reserved - must be zero */
 381 #define NS_KEY_NAME_TYPE        0x0300  /* these bits determine the type */
 382 #define NS_KEY_NAME_USER        0x0000  /* key is assoc. with user */
 383 #define NS_KEY_NAME_ENTITY      0x0200  /* key is assoc. with entity eg host */
 384 #define NS_KEY_NAME_ZONE        0x0100  /* key is zone key */
 385 #define NS_KEY_NAME_RESERVED    0x0300  /* reserved meaning */
 386 #define NS_KEY_RESERVED8        0x0080  /* reserved - must be zero */
 387 #define NS_KEY_RESERVED9        0x0040  /* reserved - must be zero */
 388 #define NS_KEY_RESERVED10       0x0020  /* reserved - must be zero */
 389 #define NS_KEY_RESERVED11       0x0010  /* reserved - must be zero */
 390 #define NS_KEY_SIGNATORYMASK    0x000F  /* key can sign RR's of same name */
 391 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
 392                                   NS_KEY_RESERVED4 | \
 393                                   NS_KEY_RESERVED5 | \
 394                                   NS_KEY_RESERVED8 | \
 395                                   NS_KEY_RESERVED9 | \
 396                                   NS_KEY_RESERVED10 | \
 397                                   NS_KEY_RESERVED11 )
 398 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */
 399
 400 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
 401 #define NS_ALG_MD5RSA           1       /* MD5 with RSA */
 402 #define NS_ALG_DH               2       /* Diffie Hellman KEY */
 403 #define NS_ALG_DSA              3       /* DSA KEY */
 404 #define NS_ALG_DSS              NS_ALG_DSA
 405 #define NS_ALG_EXPIRE_ONLY      253     /* No alg, no security */
 406 #define NS_ALG_PRIVATE_OID      254     /* Key begins with OID giving alg */
 407
 408 /* Protocol values  */
 409 /* value 0 is reserved */
 410 #define NS_KEY_PROT_TLS         1
 411 #define NS_KEY_PROT_EMAIL       2
 412 #define NS_KEY_PROT_DNSSEC      3
 413 #define NS_KEY_PROT_IPSEC       4
 414 #define NS_KEY_PROT_ANY         255
 415
 416 /* Signatures */
 417 #define NS_MD5RSA_MIN_BITS       512    /* Size of a mod or exp in bits */
 418 #define NS_MD5RSA_MAX_BITS      2552
 419         /* Total of binary mod and exp */
 420 #define NS_MD5RSA_MAX_BYTES     ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
 421         /* Max length of text sig block */
 422 #define NS_MD5RSA_MAX_BASE64    (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
 423 #define NS_MD5RSA_MIN_SIZE      ((NS_MD5RSA_MIN_BITS+7)/8)
 424 #define NS_MD5RSA_MAX_SIZE      ((NS_MD5RSA_MAX_BITS+7)/8)
 425
 426 #define NS_DSA_SIG_SIZE         41
 427 #define NS_DSA_MIN_SIZE         213
 428 #define NS_DSA_MAX_BYTES        405
 429
 430 /* Offsets into SIG record rdata to find various values */
 431 #define NS_SIG_TYPE     0       /* Type flags */
 432 #define NS_SIG_ALG      2       /* Algorithm */
 433 #define NS_SIG_LABELS   3       /* How many labels in name */
 434 #define NS_SIG_OTTL     4       /* Original TTL */
 435 #define NS_SIG_EXPIR    8       /* Expiration time */
 436 #define NS_SIG_SIGNED   12      /* Signature time */
 437 #define NS_SIG_FOOT     16      /* Key footprint */
 438 #define NS_SIG_SIGNER   18      /* Domain name of who signed it */
 439
 440 /* How RR types are represented as bit-flags in NXT records */
 441 #define NS_NXT_BITS 8
 442 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 443 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 444 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 445 #define NS_NXT_MAX 127
 446
 447 /*
 448  * EDNS0 extended flags, host order.
 449  */
 450 #define NS_OPT_DNSSEC_OK        0x8000U
 451
 452 /*
 453  * Inline versions of get/put short/long.  Pointer is advanced.
 454  */
 455 #define NS_GET16(s, cp) do { \
 456         register const u_char *t_cp = (const u_char *)(cp); \
 457         (s) = ((u_int16_t)t_cp[0] << 8) \
 458             | ((u_int16_t)t_cp[1]) \
 459             ; \
 460         (cp) += NS_INT16SZ; \
 461 } while (0)
 462
 463 #define NS_GET32(l, cp) do { \
 464         register const u_char *t_cp = (const u_char *)(cp); \
 465         (l) = ((u_int32_t)t_cp[0] << 24) \
 466             | ((u_int32_t)t_cp[1] << 16) \
 467             | ((u_int32_t)t_cp[2] << 8) \
 468             | ((u_int32_t)t_cp[3]) \
 469             ; \
 470         (cp) += NS_INT32SZ; \
 471 } while (0)
 472
 473 #define NS_PUT16(s, cp) do { \
 474         register u_int16_t t_s = (u_int16_t)(s); \
 475         register u_char *t_cp = (u_char *)(cp); \
 476         *t_cp++ = t_s >> 8; \
 477         *t_cp   = t_s; \
 478         (cp) += NS_INT16SZ; \
 479 } while (0)
 480
 481 #define NS_PUT32(l, cp) do { \
 482         register u_int32_t t_l = (u_int32_t)(l); \
 483         register u_char *t_cp = (u_char *)(cp); \
 484         *t_cp++ = t_l >> 24; \
 485         *t_cp++ = t_l >> 16; \
 486         *t_cp++ = t_l >> 8; \
 487         *t_cp   = t_l; \
 488         (cp) += NS_INT32SZ; \
 489 } while (0)
 490
 491 /*
 492  * ANSI C identifier hiding for bind's lib/nameser.
 493  */
 494 #define ns_msg_getflag          res_9_ns_msg_getflag
 495 #define ns_get16                res_9_ns_get16
 496 #define ns_get32                res_9_ns_get32
 497 #define ns_put16                res_9_ns_put16
 498 #define ns_put32                res_9_ns_put32
 499 #define ns_initparse            res_9_ns_initparse
 500 #define ns_skiprr               res_9_ns_skiprr
 501 #define ns_parserr              res_9_ns_parserr
 502 #define ns_sprintrr             res_9_ns_sprintrr
 503 #define ns_sprintrrf            res_9_ns_sprintrrf
 504 #define ns_format_ttl           res_9_ns_format_ttl
 505 #define ns_parse_ttl            res_9_ns_parse_ttl
 506 #define ns_datetosecs           res_9_ns_datetosecs
 507 #define ns_name_ntol            res_9_ns_name_ntol
 508 #define ns_name_ntop            res_9_ns_name_ntop
 509 #define ns_name_pton            res_9_ns_name_pton
 510 #define ns_name_unpack          res_9_ns_name_unpack
 511 #define ns_name_pack            res_9_ns_name_pack
 512 #define ns_name_compress        res_9_ns_name_compress
 513 #define ns_name_uncompress      res_9_ns_name_uncompress
 514 #define ns_name_skip            res_9_ns_name_skip
 515 #define ns_name_rollback        res_9_ns_name_rollback
 516 #define ns_sign                 res_9_ns_sign
 517 #define ns_sign2                res_9_ns_sign2
 518 #define ns_sign_tcp             res_9_ns_sign_tcp
 519 #define ns_sign_tcp2            res_9_ns_sign_tcp2
 520 #define ns_sign_tcp_init        res_9_ns_sign_tcp_init
 521 #define ns_find_tsig            res_9_ns_find_tsig
 522 #define ns_verify               res_9_ns_verify
 523 #define ns_verify_tcp           res_9_ns_verify_tcp
 524 #define ns_verify_tcp_init      res_9_ns_verify_tcp_init
 525 #define ns_samedomain           res_9_ns_samedomain
 526 #define ns_subdomain            res_9_ns_subdomain
 527 #define ns_makecanon            res_9_ns_makecanon
 528 #define ns_samename             res_9_ns_samename
 529
 530 __BEGIN_DECLS
 531 int             ns_msg_getflag __P((ns_msg, int));
 532 u_int           ns_get16 __P((const u_char *));
 533 u_long          ns_get32 __P((const u_char *));
 534 void            ns_put16 __P((u_int, u_char *));
 535 void            ns_put32 __P((u_long, u_char *));
 536 int             ns_initparse __P((const u_char *, int, ns_msg *));
 537 int             ns_skiprr __P((const u_char *, const u_char *, ns_sect, int));
 538 int             ns_parserr __P((ns_msg *, ns_sect, int, ns_rr *));
 539 int             ns_sprintrr __P((const ns_msg *, const ns_rr *,
 540                                  const char *, const char *, char *, size_t));
 541 int             ns_sprintrrf __P((const u_char *, size_t, const char *,
 542                                   ns_class, ns_type, u_long, const u_char *,
 543                                   size_t, const char *, const char *,
 544                                   char *, size_t));
 545 int             ns_format_ttl __P((u_long, char *, size_t));
 546 int             ns_parse_ttl __P((const char *, u_long *));
 547 u_int32_t       ns_datetosecs __P((const char *cp, int *errp));
 548 int             ns_name_ntol __P((const u_char *, u_char *, size_t));
 549 int             ns_name_ntop __P((const u_char *, char *, size_t));
 550 int             ns_name_pton __P((const char *, u_char *, size_t));
 551 int             ns_name_unpack __P((const u_char *, const u_char *,
 552                                     const u_char *, u_char *, size_t));
 553 int             ns_name_pack __P((const u_char *, u_char *, int,
 554                                   const u_char **, const u_char **));
 555 int             ns_name_uncompress __P((const u_char *, const u_char *,
 556                                         const u_char *, char *, size_t));
 557 int             ns_name_compress __P((const char *, u_char *, size_t,
 558                                       const u_char **, const u_char **));
 559 int             ns_name_skip __P((const u_char **, const u_char *));
 560 void            ns_name_rollback __P((const u_char *, const u_char **,
 561                                       const u_char **));
 562 int             ns_sign __P((u_char *, int *, int, int, void *,
 563                              const u_char *, int, u_char *, int *, time_t));
 564 int             ns_sign2 __P((u_char *, int *, int, int, void *,
 565                               const u_char *, int, u_char *, int *, time_t,
 566                               u_char **, u_char **));
 567 int             ns_sign_tcp __P((u_char *, int *, int, int,
 568                                  ns_tcp_tsig_state *, int));
 569 int             ns_sign_tcp2 __P((u_char *, int *, int, int,
 570                                   ns_tcp_tsig_state *, int,
 571                                   u_char **, u_char **));
 572 int             ns_sign_tcp_init __P((void *, const u_char *, int,
 573                                         ns_tcp_tsig_state *));
 574 u_char          *ns_find_tsig __P((u_char *, u_char *));
 575 int             ns_verify __P((u_char *, int *, void *,
 576                                const u_char *, int, u_char *, int *,
 577                                time_t *, int));
 578 int             ns_verify_tcp __P((u_char *, int *, ns_tcp_tsig_state *, int));
 579 int             ns_verify_tcp_init __P((void *, const u_char *, int,
 580                                         ns_tcp_tsig_state *));
 581 int             ns_samedomain __P((const char *, const char *));
 582 int             ns_subdomain __P((const char *, const char *));
 583 int             ns_makecanon __P((const char *, char *, size_t));
 584 int             ns_samename __P((const char *, const char *));
 585 __END_DECLS
 586
 587 #endif /* !_NAMESER_9_H_ */