1 /* $NetBSD: resolv.h,v 1.1.1.1 2009/04/12 15:33:33 christos Exp $ */ 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 */ 517