external/bsd/libbind/dist/include/resolv.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Portions Copyright (C) 2004, 2005, 2008, 2009  Internet Systems Consortium, Inc. ("ISC")
   5  * Portions Copyright (C) 1995-2003  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /*
  21  * Copyright (c) 1983, 1987, 1989
  22  *    The Regents of the University of California.  All rights reserved.
  23  *
  24  * Redistribution and use in source and binary forms, with or without
  25  * modification, are permitted provided that the following conditions
  26  * are met:
  27  * 1. Redistributions of source code must retain the above copyright
  28  *    notice, this list of conditions and the following disclaimer.
  29  * 2. Redistributions in binary form must reproduce the above copyright
  30  *    notice, this list of conditions and the following disclaimer in the
  31  *    documentation and/or other materials provided with the distribution.
  32  * 3. All advertising materials mentioning features or use of this software
  33  *    must display the following acknowledgement:
  34  *      This product includes software developed by the University of
  35  *      California, Berkeley and its contributors.
  36  * 4. Neither the name of the University nor the names of its contributors
  37  *    may be used to endorse or promote products derived from this software
  38  *    without specific prior written permission.
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  */
  52
  53 /*%
  54  *      @(#)resolv.h    8.1 (Berkeley) 6/2/93
  55  *      Id: resolv.h,v 1.30 2009/03/03 01:52:48 each Exp
  56  */
  57
  58 #ifndef _RESOLV_H_
  59 #define _RESOLV_H_
  60
  61 #include <sys/param.h>
  62 #if (!defined(BSD)) || (BSD < 199306)
  63 # include <sys/bitypes.h>
  64 #else
  65 # include <sys/types.h>
  66 #endif
  67 #include <sys/cdefs.h>
  68 #include <sys/socket.h>
  69 #include <stdio.h>
  70 #include <arpa/nameser.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 (__RES > 19931104)".  Do not
  76  * compare for equality; rather, use it to determine whether your resolver
  77  * is new enough to contain a certain feature.
  78  */
  79
  80 #define __RES   20090302
  81
  82 /*%
  83  * This used to be defined in res_query.c, now it's in herror.c.
  84  * [XXX no it's not.  It's in irs/irs_data.c]
  85  * It was
  86  * never extern'd by any *.h file before it was placed here.  For thread
  87  * aware programs, the last h_errno value set is stored in res->h_errno.
  88  *
  89  * XXX: There doesn't seem to be a good reason for exposing RES_SET_H_ERRNO
  90  *      (and __h_errno_set) to the public via <resolv.h>.
  91  * XXX: __h_errno_set is really part of IRS, not part of the resolver.
  92  *      If somebody wants to build and use a resolver that doesn't use IRS,
  93  *      what do they do?  Perhaps something like
  94  *              #ifdef WANT_IRS
  95  *              # define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x)
  96  *              #else
  97  *              # define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x))
  98  *              #endif
  99  */
 100
 101 #define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x)
 102 struct __res_state; /*%< forward */
 103 __BEGIN_DECLS
 104 void __h_errno_set(struct __res_state *res, int err);
 105 __END_DECLS
 106
 107 /*%
 108  * Resolver configuration file.
 109  * Normally not present, but may contain the address of the
 110  * initial name server(s) to query and the domain search list.
 111  */
 112
 113 #ifndef _PATH_RESCONF
 114 #define _PATH_RESCONF        "/etc/resolv.conf"
 115 #endif
 116
 117 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
 118         res_sendhookact;
 119
 120 #ifndef __PMT
 121 #if defined(__STDC__) || defined(__cplusplus)
 122 #define __PMT(args) args
 123 #else
 124 #define __PMT(args) ()
 125 #endif
 126 #endif
 127
 128 typedef res_sendhookact (*res_send_qhook)__PMT((struct sockaddr * const *,
 129                                                 const u_char **, int *,
 130                                                 u_char *, int, int *));
 131
 132 typedef res_sendhookact (*res_send_rhook)__PMT((const struct sockaddr *,
 133                                                 const u_char *, int, u_char *,
 134                                                 int, int *));
 135
 136 struct res_sym {
 137         int             number;    /*%< Identifying number, like T_MX */
 138         const char *    name;      /*%< Its symbolic name, like "MX" */
 139         const char *    humanname; /*%< Its fun name, like "mail exchanger" */
 140 };
 141
 142 /*%
 143  * Global defines and variables for resolver stub.
 144  */
 145 #define MAXNS                   3       /*%< max # name servers we'll track */
 146 #define MAXDFLSRCH              3       /*%< # default domain levels to try */
 147 #define MAXDNSRCH               6       /*%< max # domains in search path */
 148 #define LOCALDOMAINPARTS        2       /*%< min levels in name that is "local" */
 149 #define RES_TIMEOUT             5       /*%< min. seconds between retries */
 150 #define MAXRESOLVSORT           10      /*%< number of net to sort on */
 151 #define RES_MAXNDOTS            15      /*%< should reflect bit field size */
 152 #define RES_MAXRETRANS          30      /*%< only for resolv.conf/RES_OPTIONS */
 153 #define RES_MAXRETRY            5       /*%< only for resolv.conf/RES_OPTIONS */
 154 #define RES_DFLRETRY            2       /*%< Default #/tries. */
 155 #define RES_MAXTIME             65535   /*%< Infinity, in milliseconds. */
 156 struct __res_state_ext;
 157
 158 struct __res_state {
 159         int     retrans;                /*%< retransmission time interval */
 160         int     retry;                  /*%< number of times to retransmit */
 161 #ifdef sun
 162         u_int   options;                /*%< option flags - see below. */
 163 #else
 164         u_long  options;                /*%< option flags - see below. */
 165 #endif
 166         int     nscount;                /*%< number of name servers */
 167         struct sockaddr_in
 168                 nsaddr_list[MAXNS];     /*%< address of name server */
 169 #define nsaddr  nsaddr_list[0]          /*%< for backward compatibility */
 170         u_short id;                     /*%< current message id */
 171         char    *dnsrch[MAXDNSRCH+1];   /*%< components of domain to search */
 172         char    defdname[256];          /*%< default domain (deprecated) */
 173 #ifdef sun
 174         u_int   pfcode;                 /*%< RES_PRF_ flags - see below. */
 175 #else
 176         u_long  pfcode;                 /*%< RES_PRF_ flags - see below. */
 177 #endif
 178         unsigned ndots:4;               /*%< threshold for initial abs. query */
 179         unsigned nsort:4;               /*%< number of elements in sort_list[] */
 180         char    unused[3];
 181         struct {
 182                 struct in_addr  addr;
 183                 u_int32_t       mask;
 184         } sort_list[MAXRESOLVSORT];
 185         res_send_qhook qhook;           /*%< query hook */
 186         res_send_rhook rhook;           /*%< response hook */
 187         int     res_h_errno;            /*%< last one set for this context */
 188         int     _vcsock;                /*%< PRIVATE: for res_send VC i/o */
 189         u_int   _flags;                 /*%< PRIVATE: see below */
 190         u_char  _rnd[16];               /*%< PRIVATE: random state */
 191         u_int   _pad;                   /*%< make _u 64 bit aligned */
 192         union {
 193                 /* On an 32-bit arch this means 512b total. */
 194                 char    pad[56 - 4*sizeof (int) - 2*sizeof (void *)];
 195                 struct {
 196                         u_int16_t               nscount;
 197                         u_int16_t               nstimes[MAXNS]; /*%< ms. */
 198                         int                     nssocks[MAXNS];
 199                         struct __res_state_ext *ext;    /*%< extention for IPv6 */
 200                 } _ext;
 201         } _u;
 202 };
 203
 204 typedef struct __res_state *res_state;
 205
 206 union res_sockaddr_union {
 207         struct sockaddr_in      sin;
 208 #ifdef IN6ADDR_ANY_INIT
 209         struct sockaddr_in6     sin6;
 210 #endif
 211 #ifdef ISC_ALIGN64
 212         int64_t                 __align64;      /*%< 64bit alignment */
 213 #else
 214         int32_t                 __align32;      /*%< 32bit alignment */
 215 #endif
 216         char                    __space[128];   /*%< max size */
 217 };
 218
 219 /*%
 220  * Resolver flags (used to be discrete per-module statics ints).
 221  */
 222 #define RES_F_VC        0x00000001      /*%< socket is TCP */
 223 #define RES_F_CONN      0x00000002      /*%< socket is connected */
 224 #define RES_F_EDNS0ERR  0x00000004      /*%< EDNS0 caused errors */
 225 #define RES_F__UNUSED   0x00000008      /*%< (unused) */
 226 #define RES_F_LASTMASK  0x000000F0      /*%< ordinal server of last res_nsend */
 227 #define RES_F_LASTSHIFT 4               /*%< bit position of LASTMASK "flag" */
 228 #define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT)
 229
 230 /* res_findzonecut2() options */
 231 #define RES_EXHAUSTIVE  0x00000001      /*%< always do all queries */
 232 #define RES_IPV4ONLY    0x00000002      /*%< IPv4 only */
 233 #define RES_IPV6ONLY    0x00000004      /*%< IPv6 only */
 234
 235 /*%
 236  * Resolver options (keep these in synch with res_debug.c, please)
 237  */
 238 #define RES_INIT        0x00000001      /*%< address initialized */
 239 #define RES_DEBUG       0x00000002      /*%< print debug messages */
 240 #define RES_AAONLY      0x00000004      /*%< authoritative answers only (!IMPL)*/
 241 #define RES_USEVC       0x00000008      /*%< use virtual circuit */
 242 #define RES_PRIMARY     0x00000010      /*%< query primary server only (!IMPL) */
 243 #define RES_IGNTC       0x00000020      /*%< ignore trucation errors */
 244 #define RES_RECURSE     0x00000040      /*%< recursion desired */
 245 #define RES_DEFNAMES    0x00000080      /*%< use default domain name */
 246 #define RES_STAYOPEN    0x00000100      /*%< Keep TCP socket open */
 247 #define RES_DNSRCH      0x00000200      /*%< search up local domain tree */
 248 #define RES_INSECURE1   0x00000400      /*%< type 1 security disabled */
 249 #define RES_INSECURE2   0x00000800      /*%< type 2 security disabled */
 250 #define RES_NOALIASES   0x00001000      /*%< shuts off HOSTALIASES feature */
 251 #define RES_USE_INET6   0x00002000      /*%< use/map IPv6 in gethostbyname() */
 252 #define RES_ROTATE      0x00004000      /*%< rotate ns list after each query */
 253 #define RES_NOCHECKNAME 0x00008000      /*%< do not check names for sanity. */
 254 #define RES_KEEPTSIG    0x00010000      /*%< do not strip TSIG records */
 255 #define RES_BLAST       0x00020000      /*%< blast all recursive servers */
 256 #define RES_NSID        0x00040000      /*%< request name server ID */
 257 #define RES_NOTLDQUERY  0x00100000      /*%< don't unqualified name as a tld */
 258 #define RES_USE_DNSSEC  0x00200000      /*%< use DNSSEC using OK bit in OPT */
 259 /* #define RES_DEBUG2   0x00400000 */   /* nslookup internal */
 260 /* KAME extensions: use higher bit to avoid conflict with ISC use */
 261 #define RES_USE_DNAME   0x10000000      /*%< use DNAME */
 262 #define RES_USE_EDNS0   0x40000000      /*%< use EDNS0 if configured */
 263 #define RES_NO_NIBBLE2  0x80000000      /*%< disable alternate nibble lookup */
 264
 265 #define RES_DEFAULT     (RES_RECURSE | RES_DEFNAMES | \
 266                          RES_DNSRCH | RES_NO_NIBBLE2)
 267
 268 /*%
 269  * Resolver "pfcode" values.  Used by dig.
 270  */
 271 #define RES_PRF_STATS   0x00000001
 272 #define RES_PRF_UPDATE  0x00000002
 273 #define RES_PRF_CLASS   0x00000004
 274 #define RES_PRF_CMD     0x00000008
 275 #define RES_PRF_QUES    0x00000010
 276 #define RES_PRF_ANS     0x00000020
 277 #define RES_PRF_AUTH    0x00000040
 278 #define RES_PRF_ADD     0x00000080
 279 #define RES_PRF_HEAD1   0x00000100
 280 #define RES_PRF_HEAD2   0x00000200
 281 #define RES_PRF_TTLID   0x00000400
 282 #define RES_PRF_HEADX   0x00000800
 283 #define RES_PRF_QUERY   0x00001000
 284 #define RES_PRF_REPLY   0x00002000
 285 #define RES_PRF_INIT    0x00004000
 286 #define RES_PRF_TRUNC   0x00008000
 287 /*                      0x00010000      */
 288
 289 /* Things involving an internal (static) resolver context. */
 290 #ifdef _REENTRANT
 291 __BEGIN_DECLS
 292 extern struct __res_state *__res_state(void);
 293 __END_DECLS
 294 #define _res (*__res_state())
 295 #else
 296 #ifdef __linux
 297 __BEGIN_DECLS
 298 extern struct __res_state * __res_state(void);
 299 __END_DECLS
 300 #endif
 301 #ifndef __BIND_NOSTATIC
 302 extern struct __res_state _res;
 303 #endif
 304 #endif
 305
 306 #ifndef __BIND_NOSTATIC
 307 #define fp_nquery               __fp_nquery
 308 #define fp_query                __fp_query
 309 #define hostalias               __hostalias
 310 #define p_query                 __p_query
 311 #define res_close               __res_close
 312 #define res_init                __res_init
 313 #define res_isourserver         __res_isourserver
 314 #define res_mkquery             __res_mkquery
 315 #define res_query               __res_query
 316 #define res_querydomain         __res_querydomain
 317 #define res_search              __res_search
 318 #define res_send                __res_send
 319 #define res_sendsigned          __res_sendsigned
 320
 321 __BEGIN_DECLS
 322 void            fp_nquery __P((const u_char *, int, FILE *));
 323 void            fp_query __P((const u_char *, FILE *));
 324 const char *    hostalias __P((const char *));
 325 void            p_query __P((const u_char *));
 326 void            res_close __P((void));
 327 int             res_init __P((void));
 328 int             res_isourserver __P((const struct sockaddr_in *));
 329 int             res_mkquery __P((int, const char *, int, int, const u_char *,
 330                                  int, const u_char *, u_char *, int));
 331 int             res_query __P((const char *, int, int, u_char *, int));
 332 int             res_querydomain __P((const char *, const char *, int, int,
 333                                      u_char *, int));
 334 int             res_search __P((const char *, int, int, u_char *, int));
 335 int             res_send __P((const u_char *, int, u_char *, int));
 336 int             res_sendsigned __P((const u_char *, int, ns_tsig_key *,
 337                                     u_char *, int));
 338 __END_DECLS
 339 #endif
 340
 341 #if !defined(SHARED_LIBBIND) || defined(LIB)
 342 /*
 343  * If libbind is a shared object (well, DLL anyway)
 344  * these externs break the linker when resolv.h is
 345  * included by a lib client (like named)
 346  * Make them go away if a client is including this
 347  *
 348  */
 349 extern const struct res_sym __p_key_syms[];
 350 extern const struct res_sym __p_cert_syms[];
 351 extern const struct res_sym __p_class_syms[];
 352 extern const struct res_sym __p_type_syms[];
 353 extern const struct res_sym __p_rcode_syms[];
 354 #endif /* SHARED_LIBBIND */
 355
 356 #define b64_ntop                __b64_ntop
 357 #define b64_pton                __b64_pton
 358 #define dn_comp                 __dn_comp
 359 #define dn_count_labels         __dn_count_labels
 360 #define dn_expand               __dn_expand
 361 #define dn_skipname             __dn_skipname
 362 #define fp_resstat              __fp_resstat
 363 #define loc_aton                __loc_aton
 364 #define loc_ntoa                __loc_ntoa
 365 #define p_cdname                __p_cdname
 366 #define p_cdnname               __p_cdnname
 367 #define p_class                 __p_class
 368 #define p_fqname                __p_fqname
 369 #define p_fqnname               __p_fqnname
 370 #define p_option                __p_option
 371 #define p_secstodate            __p_secstodate
 372 #define p_section               __p_section
 373 #define p_time                  __p_time
 374 #define p_type                  __p_type
 375 #define p_rcode                 __p_rcode
 376 #define p_sockun                __p_sockun
 377 #define putlong                 __putlong
 378 #define putshort                __putshort
 379 #define res_dnok                __res_dnok
 380 #define res_findzonecut         __res_findzonecut
 381 #define res_findzonecut2        __res_findzonecut2
 382 #define res_hnok                __res_hnok
 383 #define res_hostalias           __res_hostalias
 384 #define res_mailok              __res_mailok
 385 #define res_nameinquery         __res_nameinquery
 386 #define res_nclose              __res_nclose
 387 #define res_ninit               __res_ninit
 388 #define res_nmkquery            __res_nmkquery
 389 #define res_pquery              __res_pquery
 390 #define res_nquery              __res_nquery
 391 #define res_nquerydomain        __res_nquerydomain
 392 #define res_nsearch             __res_nsearch
 393 #define res_nsend               __res_nsend
 394 #define res_nsendsigned         __res_nsendsigned
 395 #define res_nisourserver        __res_nisourserver
 396 #define res_ownok               __res_ownok
 397 #define res_queriesmatch        __res_queriesmatch
 398 #define res_rndinit             __res_rndinit
 399 #define res_randomid            __res_randomid
 400 #define res_nrandomid           __res_nrandomid
 401 #define sym_ntop                __sym_ntop
 402 #define sym_ntos                __sym_ntos
 403 #define sym_ston                __sym_ston
 404 #define res_nopt                __res_nopt
 405 #define res_nopt_rdata          __res_nopt_rdata
 406 #define res_ndestroy            __res_ndestroy
 407 #define res_nametoclass         __res_nametoclass
 408 #define res_nametotype          __res_nametotype
 409 #define res_setservers          __res_setservers
 410 #define res_getservers          __res_getservers
 411 #define res_buildprotolist      __res_buildprotolist
 412 #define res_destroyprotolist    __res_destroyprotolist
 413 #define res_destroyservicelist  __res_destroyservicelist
 414 #define res_get_nibblesuffix    __res_get_nibblesuffix
 415 #define res_get_nibblesuffix2   __res_get_nibblesuffix2
 416 #define res_ourserver_p         __res_ourserver_p
 417 #define res_protocolname        __res_protocolname
 418 #define res_protocolnumber      __res_protocolnumber
 419 #define res_send_setqhook       __res_send_setqhook
 420 #define res_send_setrhook       __res_send_setrhook
 421 #define res_servicename         __res_servicename
 422 #define res_servicenumber       __res_servicenumber
 423 __BEGIN_DECLS
 424 int             res_hnok __P((const char *));
 425 int             res_ownok __P((const char *));
 426 int             res_mailok __P((const char *));
 427 int             res_dnok __P((const char *));
 428 int             sym_ston __P((const struct res_sym *, const char *, int *));
 429 const char *    sym_ntos __P((const struct res_sym *, int, int *));
 430 const char *    sym_ntop __P((const struct res_sym *, int, int *));
 431 int             b64_ntop __P((u_char const *, size_t, char *, size_t));
 432 int             b64_pton __P((char const *, u_char *, size_t));
 433 int             loc_aton __P((const char *, u_char *));
 434 const char *    loc_ntoa __P((const u_char *, char *));
 435 int             dn_skipname __P((const u_char *, const u_char *));
 436 void            putlong __P((u_int32_t, u_char *));
 437 void            putshort __P((u_int16_t, u_char *));
 438 #ifndef __ultrix__
 439 u_int16_t       _getshort __P((const u_char *));
 440 u_int32_t       _getlong __P((const u_char *));
 441 #endif
 442 const char *    p_class __P((int));
 443 const char *    p_time __P((u_int32_t));
 444 const char *    p_type __P((int));
 445 const char *    p_rcode __P((int));
 446 const char *    p_sockun __P((union res_sockaddr_union, char *, size_t));
 447 const u_char *  p_cdnname __P((const u_char *, const u_char *, int, FILE *));
 448 const u_char *  p_cdname __P((const u_char *, const u_char *, FILE *));
 449 const u_char *  p_fqnname __P((const u_char *, const u_char *,
 450                                int, char *, int));
 451 const u_char *  p_fqname __P((const u_char *, const u_char *, FILE *));
 452 const char *    p_option __P((u_long));
 453 char *          p_secstodate __P((u_long));
 454 int             dn_count_labels __P((const char *));
 455 int             dn_comp __P((const char *, u_char *, int,
 456                              u_char **, u_char **));
 457 int             dn_expand __P((const u_char *, const u_char *, const u_char *,
 458                                char *, int));
 459 void            res_rndinit __P((res_state));
 460 u_int           res_randomid __P((void));
 461 u_int           res_nrandomid __P((res_state));
 462 int             res_nameinquery __P((const char *, int, int, const u_char *,
 463                                      const u_char *));
 464 int             res_queriesmatch __P((const u_char *, const u_char *,
 465                                       const u_char *, const u_char *));
 466 const char *    p_section __P((int, int));
 467 /* Things involving a resolver context. */
 468 int             res_ninit __P((res_state));
 469 int             res_nisourserver __P((const res_state,
 470                                       const struct sockaddr_in *));
 471 void            fp_resstat __P((const res_state, FILE *));
 472 void            res_pquery __P((const res_state, const u_char *, int, FILE *));
 473 const char *    res_hostalias __P((const res_state, const char *,
 474                                    char *, size_t));
 475 int             res_nquery __P((res_state, const char *, int, int,
 476                                 u_char *, int));
 477 int             res_nsearch __P((res_state, const char *, int, int, u_char *,
 478                                  int));
 479 int             res_nquerydomain __P((res_state, const char *, const char *,
 480                                       int, int, u_char *, int));
 481 int             res_nmkquery __P((res_state, int, const char *, int, int,
 482                                   const u_char *, int, const u_char *,
 483                                   u_char *, int));
 484 int             res_nsend __P((res_state, const u_char *, int, u_char *, int));
 485 int             res_nsendsigned __P((res_state, const u_char *, int,
 486                                      ns_tsig_key *, u_char *, int));
 487 int             res_findzonecut __P((res_state, const char *, ns_class, int,
 488                                      char *, size_t, struct in_addr *, int));
 489 int             res_findzonecut2 __P((res_state, const char *, ns_class, int,
 490                                       char *, size_t,
 491                                       union res_sockaddr_union *, int));
 492 void            res_nclose __P((res_state));
 493 int             res_nopt __P((res_state, int, u_char *, int, int));
 494 int             res_nopt_rdata __P((res_state, int, u_char *, int, u_char *,
 495                                     u_short, u_short, u_char *));
 496 void            res_send_setqhook __P((res_send_qhook));
 497 void            res_send_setrhook __P((res_send_rhook));
 498 int             __res_vinit __P((res_state, int));
 499 void            res_destroyservicelist __P((void));
 500 const char *    res_servicename __P((u_int16_t, const char *));
 501 const char *    res_protocolname __P((int));
 502 void            res_destroyprotolist __P((void));
 503 void            res_buildprotolist __P((void));
 504 const char *    res_get_nibblesuffix __P((res_state));
 505 const char *    res_get_nibblesuffix2 __P((res_state));
 506 void            res_ndestroy __P((res_state));
 507 u_int16_t       res_nametoclass __P((const char *, int *));
 508 u_int16_t       res_nametotype __P((const char *, int *));
 509 void            res_setservers __P((res_state,
 510                                     const union res_sockaddr_union *, int));
 511 int             res_getservers __P((res_state,
 512                                     union res_sockaddr_union *, int));
 513 __END_DECLS
 514
 515 #endif /* !_RESOLV_H_ */
 516 /*! \file */