resolv.h 14 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395
  1. /*
  2. * Copyright (c) 1983, 1987, 1989
  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. * 4. Neither the name of the University nor the names of its contributors
  14. * may be used to endorse or promote products derived from this software
  15. * without specific prior written permission.
  16. *
  17. * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20. * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27. * SUCH DAMAGE.
  28. */
  29. /*
  30. * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
  31. *
  32. * Permission to use, copy, modify, and distribute this software for any
  33. * purpose with or without fee is hereby granted, provided that the above
  34. * copyright notice and this permission notice appear in all copies.
  35. *
  36. * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
  37. * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
  38. * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
  39. * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  40. * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  41. * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  42. * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  43. * SOFTWARE.
  44. */
  45. /*
  46. * @(#)resolv.h 8.1 (Berkeley) 6/2/93
  47. * $BINDId: resolv.h,v 8.31 2000/03/30 20:16:50 vixie Exp $
  48. */
  49. #ifndef _RESOLV_H_
  50. /* These headers are needed for types used in the `struct res_state'
  51. declaration. */
  52. #include <sys/types.h>
  53. #include <netinet/in.h>
  54. #ifndef __need_res_state
  55. # define _RESOLV_H_
  56. # include <sys/param.h>
  57. # include <sys/cdefs.h>
  58. # include <stdio.h>
  59. # include <arpa/nameser.h>
  60. #endif
  61. #ifndef __res_state_defined
  62. # define __res_state_defined
  63. typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
  64. res_sendhookact;
  65. typedef res_sendhookact (*res_send_qhook) (struct sockaddr_in * const *ns,
  66. const u_char **query,
  67. int *querylen,
  68. u_char *ans,
  69. int anssiz,
  70. int *resplen);
  71. typedef res_sendhookact (*res_send_rhook) (const struct sockaddr_in *ns,
  72. const u_char *query,
  73. int querylen,
  74. u_char *ans,
  75. int anssiz,
  76. int *resplen);
  77. /*
  78. * Global defines and variables for resolver stub.
  79. */
  80. # define MAXNS 3 /* max # name servers we'll track */
  81. # define MAXDFLSRCH 3 /* # default domain levels to try */
  82. # define MAXDNSRCH 6 /* max # domains in search path */
  83. # define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
  84. # define RES_TIMEOUT 5 /* min. seconds between retries */
  85. # define MAXRESOLVSORT 10 /* number of net to sort on */
  86. # define RES_MAXNDOTS 15 /* should reflect bit field size */
  87. # define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */
  88. # define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */
  89. # define RES_DFLRETRY 2 /* Default #/tries. */
  90. # define RES_MAXTIME 65535 /* Infinity, in milliseconds. */
  91. struct __res_state {
  92. int retrans; /* retransmition time interval */
  93. int retry; /* number of times to retransmit */
  94. u_long options; /* option flags - see below. */
  95. int nscount; /* number of name servers */
  96. struct sockaddr_in
  97. nsaddr_list[MAXNS]; /* address of name server */
  98. # define nsaddr nsaddr_list[0] /* for backward compatibility */
  99. u_short id; /* current message id */
  100. char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
  101. char defdname[256]; /* default domain (deprecated) */
  102. u_long pfcode; /* RES_PRF_ flags - see below. */
  103. unsigned ndots:4; /* threshold for initial abs. query */
  104. unsigned nsort:4; /* number of elements in sort_list[] */
  105. char unused[3];
  106. struct {
  107. struct in_addr addr;
  108. u_int32_t mask;
  109. } sort_list[MAXRESOLVSORT];
  110. res_send_qhook qhook; /* query hook */
  111. res_send_rhook rhook; /* response hook */
  112. int res_h_errno; /* last one set for this context */
  113. int _vcsock; /* PRIVATE: for res_send VC i/o */
  114. u_int _flags; /* PRIVATE: see below */
  115. union {
  116. char pad[52]; /* On an i386 this means 512b total. */
  117. struct {
  118. u_int16_t nscount;
  119. #if 0
  120. u_int16_t nsmap[MAXNS];
  121. #else
  122. u_int16_t nstimes[MAXNS]; /* ms. */
  123. #endif
  124. int nssocks[MAXNS];
  125. u_int16_t nscount6;
  126. u_int16_t nsinit;
  127. struct sockaddr_in6 *nsaddrs[MAXNS];
  128. #if 0
  129. #ifdef _LIBC
  130. unsigned long long int initstamp
  131. __attribute__((packed));
  132. #else
  133. unsigned int _initstamp[2];
  134. #endif
  135. #endif
  136. } _ext;
  137. } _u;
  138. };
  139. typedef struct __res_state *res_state;
  140. # undef __need_res_state
  141. #endif
  142. #ifdef _RESOLV_H_
  143. /*
  144. * Revision information. This is the release date in YYYYMMDD format.
  145. * It can change every day so the right thing to do with it is use it
  146. * in preprocessor commands such as "#if (__RES > 19931104)". Do not
  147. * compare for equality; rather, use it to determine whether your resolver
  148. * is new enough to contain a certain feature.
  149. */
  150. #if 0
  151. #define __RES 19991006
  152. #else
  153. #define __RES 19960801
  154. #endif
  155. /*
  156. * Resolver configuration file.
  157. * Normally not present, but may contain the address of the
  158. * inital name server(s) to query and the domain search list.
  159. */
  160. #ifndef _PATH_RESCONF
  161. #define _PATH_RESCONF "/etc/resolv.conf"
  162. #endif
  163. struct res_sym {
  164. int number; /* Identifying number, like T_MX */
  165. char * name; /* Its symbolic name, like "MX" */
  166. char * humanname; /* Its fun name, like "mail exchanger" */
  167. };
  168. /*
  169. * Resolver flags (used to be discrete per-module statics ints).
  170. */
  171. #define RES_F_VC 0x00000001 /* socket is TCP */
  172. #define RES_F_CONN 0x00000002 /* socket is connected */
  173. /* res_findzonecut() options */
  174. #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */
  175. /*
  176. * Resolver options (keep these in synch with res_debug.c, please)
  177. */
  178. #define RES_INIT 0x00000001 /* address initialized */
  179. #define RES_DEBUG 0x00000002 /* print debug messages */
  180. #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/
  181. #define RES_USEVC 0x00000008 /* use virtual circuit */
  182. #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */
  183. #define RES_IGNTC 0x00000020 /* ignore trucation errors */
  184. #define RES_RECURSE 0x00000040 /* recursion desired */
  185. #define RES_DEFNAMES 0x00000080 /* use default domain name */
  186. #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
  187. #define RES_DNSRCH 0x00000200 /* search up local domain tree */
  188. #define RES_INSECURE1 0x00000400 /* type 1 security disabled */
  189. #define RES_INSECURE2 0x00000800 /* type 2 security disabled */
  190. #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
  191. #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
  192. #define RES_ROTATE 0x00004000 /* rotate ns list after each query */
  193. #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */
  194. #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */
  195. #define RES_BLAST 0x00020000 /* blast all recursive servers */
  196. #if 0
  197. #define RES_USEBSTRING 0x00040000 /* IPv6 reverse lookup with byte
  198. strings */
  199. #define RES_NOIP6DOTINT 0x00080000 /* Do not use .ip6.int in IPv6
  200. reverse lookup */
  201. #define RES_DEFAULT (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH|RES_NOIP6DOTINT)
  202. #else
  203. #define RES_DEFAULT (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH)
  204. #endif
  205. /*
  206. * Resolver "pfcode" values. Used by dig.
  207. */
  208. #define RES_PRF_STATS 0x00000001
  209. #define RES_PRF_UPDATE 0x00000002
  210. #define RES_PRF_CLASS 0x00000004
  211. #define RES_PRF_CMD 0x00000008
  212. #define RES_PRF_QUES 0x00000010
  213. #define RES_PRF_ANS 0x00000020
  214. #define RES_PRF_AUTH 0x00000040
  215. #define RES_PRF_ADD 0x00000080
  216. #define RES_PRF_HEAD1 0x00000100
  217. #define RES_PRF_HEAD2 0x00000200
  218. #define RES_PRF_TTLID 0x00000400
  219. #define RES_PRF_HEADX 0x00000800
  220. #define RES_PRF_QUERY 0x00001000
  221. #define RES_PRF_REPLY 0x00002000
  222. #define RES_PRF_INIT 0x00004000
  223. /* 0x00008000 */
  224. /* Things involving an internal (static) resolver context. */
  225. #if 0
  226. __BEGIN_DECLS
  227. extern struct __res_state *__res_state(void) __attribute__ ((__const__));
  228. __END_DECLS
  229. #define _res (*__res_state())
  230. #else
  231. extern struct __res_state _res;
  232. #endif
  233. #define fp_nquery __fp_nquery
  234. #define fp_query __fp_query
  235. #define hostalias __hostalias
  236. #define p_query __p_query
  237. #define res_close __res_close
  238. #define res_init __res_init
  239. #define res_isourserver __res_isourserver
  240. #define res_mkquery __res_mkquery
  241. #define res_query __res_query
  242. #define res_querydomain __res_querydomain
  243. #define res_search __res_search
  244. #define res_send __res_send
  245. __BEGIN_DECLS
  246. void fp_nquery (const u_char *, int, FILE *) __THROW;
  247. void fp_query (const u_char *, FILE *) __THROW;
  248. const char * hostalias (const char *) __THROW;
  249. void p_query (const u_char *) __THROW;
  250. #ifdef __UCLIBC_HAS_BSD_RES_CLOSE__
  251. void res_close (void) __THROW;
  252. #endif
  253. int res_init (void) __THROW;
  254. int res_isourserver (const struct sockaddr_in *) __THROW;
  255. int res_mkquery (int, const char *, int, int, const u_char *,
  256. int, const u_char *, u_char *, int) __THROW;
  257. int res_query (const char *, int, int, u_char *, int) __THROW;
  258. int res_querydomain (const char *, const char *, int, int,
  259. u_char *, int) __THROW;
  260. int res_search (const char *, int, int, u_char *, int) __THROW;
  261. int res_send (const u_char *, int, u_char *, int) __THROW;
  262. __END_DECLS
  263. #define b64_ntop __b64_ntop
  264. #define b64_pton __b64_pton
  265. #define dn_comp __dn_comp
  266. #define dn_count_labels __dn_count_labels
  267. #define dn_expand __dn_expand
  268. #define dn_skipname __dn_skipname
  269. #define fp_resstat __fp_resstat
  270. #define loc_aton __loc_aton
  271. #define loc_ntoa __loc_ntoa
  272. #define p_cdname __p_cdname
  273. #define p_cdnname __p_cdnname
  274. #define p_class __p_class
  275. #define p_fqname __p_fqname
  276. #define p_fqnname __p_fqnname
  277. #define p_option __p_option
  278. #define p_secstodate __p_secstodate
  279. #define p_section __p_section
  280. #define p_time __p_time
  281. #define p_type __p_type
  282. #define p_rcode __p_rcode
  283. #define putlong __putlong
  284. #define putshort __putshort
  285. #define res_dnok __res_dnok
  286. #define res_hnok __res_hnok
  287. #define res_hostalias __res_hostalias
  288. #define res_mailok __res_mailok
  289. #define res_nameinquery __res_nameinquery
  290. #define res_nclose __res_nclose
  291. #define res_ninit __res_ninit
  292. #define res_nmkquery __res_nmkquery
  293. #define res_npquery __res_npquery
  294. #define res_nquery __res_nquery
  295. #define res_nquerydomain __res_nquerydomain
  296. #define res_nsearch __res_nsearch
  297. #define res_nsend __res_nsend
  298. #define res_nisourserver __res_nisourserver
  299. #define res_ownok __res_ownok
  300. #define res_queriesmatch __res_queriesmatch
  301. #define res_randomid __res_randomid
  302. #define sym_ntop __sym_ntop
  303. #define sym_ntos __sym_ntos
  304. #define sym_ston __sym_ston
  305. __BEGIN_DECLS
  306. int res_hnok (const char *) __THROW;
  307. int res_ownok (const char *) __THROW;
  308. int res_mailok (const char *) __THROW;
  309. int res_dnok (const char *) __THROW;
  310. int sym_ston (const struct res_sym *, const char *, int *) __THROW;
  311. const char * sym_ntos (const struct res_sym *, int, int *) __THROW;
  312. const char * sym_ntop (const struct res_sym *, int, int *) __THROW;
  313. int b64_ntop (u_char const *, size_t, char *, size_t) __THROW;
  314. int b64_pton (char const *, u_char *, size_t) __THROW;
  315. int loc_aton (const char *ascii, u_char *binary) __THROW;
  316. const char * loc_ntoa (const u_char *binary, char *ascii) __THROW;
  317. int dn_skipname (const u_char *, const u_char *) __THROW;
  318. void putlong (u_int32_t, u_char *) __THROW;
  319. void putshort (u_int16_t, u_char *) __THROW;
  320. const char * p_class (int) __THROW;
  321. const char * p_time (u_int32_t) __THROW;
  322. const char * p_type (int) __THROW;
  323. const char * p_rcode (int) __THROW;
  324. const u_char * p_cdnname (const u_char *, const u_char *, int, FILE *)
  325. __THROW;
  326. const u_char * p_cdname (const u_char *, const u_char *, FILE *) __THROW;
  327. const u_char * p_fqnname (const u_char *cp, const u_char *msg,
  328. int, char *, int) __THROW;
  329. const u_char * p_fqname (const u_char *, const u_char *, FILE *) __THROW;
  330. const char * p_option (u_long option) __THROW;
  331. char * p_secstodate (u_long) __THROW;
  332. int dn_count_labels (const char *) __THROW;
  333. int dn_comp (const char *, u_char *, int, u_char **, u_char **)
  334. __THROW;
  335. int dn_expand (const u_char *, const u_char *, const u_char *,
  336. char *, int) __THROW;
  337. u_int res_randomid (void) __THROW;
  338. int res_nameinquery (const char *, int, int,
  339. const u_char *, const u_char *) __THROW;
  340. int res_queriesmatch (const u_char *, const u_char *,
  341. const u_char *, const u_char *) __THROW;
  342. const char * p_section (int section, int opcode) __THROW;
  343. /* Things involving a resolver context. */
  344. int res_ninit (res_state) __THROW;
  345. int res_nisourserver (const res_state,
  346. const struct sockaddr_in *) __THROW;
  347. void fp_resstat (const res_state, FILE *) __THROW;
  348. void res_npquery (const res_state, const u_char *, int, FILE *)
  349. __THROW;
  350. const char * res_hostalias (const res_state, const char *, char *, size_t)
  351. __THROW;
  352. int res_nquery (res_state, const char *, int, int, u_char *, int)
  353. __THROW;
  354. int res_nsearch (res_state, const char *, int, int, u_char *, int)
  355. __THROW;
  356. int res_nquerydomain (res_state, const char *, const char *, int,
  357. int, u_char *, int) __THROW;
  358. int res_nmkquery (res_state, int, const char *, int, int,
  359. const u_char *, int, const u_char *, u_char *,
  360. int) __THROW;
  361. int res_nsend (res_state, const u_char *, int, u_char *, int)
  362. __THROW;
  363. void res_nclose (res_state) __THROW;
  364. __END_DECLS
  365. #endif
  366. #endif /* !_RESOLV_H_ */