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14 * may be used to endorse or promote products derived from this software
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20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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31 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
33 * Permission to use, copy, modify, and distribute this software for any
34 * purpose with or without fee is hereby granted, provided that the above
35 * copyright notice and this permission notice appear in all copies.
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48 * @(#)resolv.h 8.1 (Berkeley) 6/2/93
49 * $BINDId: resolv.h,v 8.31 2000/03/30 20:16:50 vixie Exp $
54 /* These headers are needed for types used in the `struct res_state'
56 #include <sys/types.h>
57 #include <netinet/in.h>
59 #ifndef __need_res_state
62 # include <sys/param.h>
63 # include <sys/cdefs.h>
65 # include <arpa/nameser.h>
68 #ifndef __res_state_defined
69 # define __res_state_defined
71 typedef enum { res_goahead
, res_nextns
, res_modified
, res_done
, res_error
}
74 typedef res_sendhookact (*res_send_qhook
) (struct sockaddr_in
* const *ns
,
81 typedef res_sendhookact (*res_send_rhook
) (const struct sockaddr_in
*ns
,
89 * Global defines and variables for resolver stub.
91 # define MAXNS 3 /* max # name servers we'll track */
92 # define MAXDFLSRCH 3 /* # default domain levels to try */
93 # define MAXDNSRCH 6 /* max # domains in search path */
94 # define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
96 # define RES_TIMEOUT 5 /* min. seconds between retries */
97 # define MAXRESOLVSORT 10 /* number of net to sort on */
98 # define RES_MAXNDOTS 15 /* should reflect bit field size */
99 # define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */
100 # define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */
101 # define RES_DFLRETRY 2 /* Default #/tries. */
102 # define RES_MAXTIME 65535 /* Infinity, in milliseconds. */
105 int retrans
; /* retransmition time interval */
106 int retry
; /* number of times to retransmit */
107 u_long options
; /* option flags - see below. */
108 int nscount
; /* number of name servers */
110 nsaddr_list
[MAXNS
]; /* address of name server */
111 # define nsaddr nsaddr_list[0] /* for backward compatibility */
112 u_short id
; /* current message id */
113 char *dnsrch
[MAXDNSRCH
+1]; /* components of domain to search */
114 char defdname
[256]; /* default domain (deprecated) */
115 u_long pfcode
; /* RES_PRF_ flags - see below. */
116 unsigned ndots
:4; /* threshold for initial abs. query */
117 unsigned nsort
:4; /* number of elements in sort_list[] */
122 } sort_list
[MAXRESOLVSORT
];
123 res_send_qhook qhook
; /* query hook */
124 res_send_rhook rhook
; /* response hook */
125 int res_h_errno
; /* last one set for this context */
126 int _vcsock
; /* PRIVATE: for res_send VC i/o */
127 u_int _flags
; /* PRIVATE: see below */
129 char pad
[52]; /* On an i386 this means 512b total. */
132 u_int16_t nsmap
[MAXNS
];
136 struct sockaddr_in6
*nsaddrs
[MAXNS
];
141 typedef struct __res_state
*res_state
;
142 # undef __need_res_state
147 * Revision information. This is the release date in YYYYMMDD format.
148 * It can change every day so the right thing to do with it is use it
149 * in preprocessor commands such as "#if (__RES > 19931104)". Do not
150 * compare for equality; rather, use it to determine whether your resolver
151 * is new enough to contain a certain feature.
154 #define __RES 19991006
157 * Resolver configuration file.
158 * Normally not present, but may contain the address of the
159 * inital name server(s) to query and the domain search list.
162 #ifndef _PATH_RESCONF
163 #define _PATH_RESCONF "/etc/resolv.conf"
167 int number
; /* Identifying number, like T_MX */
168 char * name
; /* Its symbolic name, like "MX" */
169 char * humanname
; /* Its fun name, like "mail exchanger" */
173 * Resolver flags (used to be discrete per-module statics ints).
175 #define RES_F_VC 0x00000001 /* socket is TCP */
176 #define RES_F_CONN 0x00000002 /* socket is connected */
178 /* res_findzonecut() options */
179 #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */
182 * Resolver options (keep these in synch with res_debug.c, please)
184 #define RES_INIT 0x00000001 /* address initialized */
185 #define RES_DEBUG 0x00000002 /* print debug messages */
186 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/
187 #define RES_USEVC 0x00000008 /* use virtual circuit */
188 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */
189 #define RES_IGNTC 0x00000020 /* ignore trucation errors */
190 #define RES_RECURSE 0x00000040 /* recursion desired */
191 #define RES_DEFNAMES 0x00000080 /* use default domain name */
192 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
193 #define RES_DNSRCH 0x00000200 /* search up local domain tree */
194 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */
195 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */
196 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
197 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
198 #define RES_ROTATE 0x00004000 /* rotate ns list after each query */
199 #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */
200 #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */
201 #define RES_BLAST 0x00020000 /* blast all recursive servers */
202 #define RES_USEBSTRING 0x00040000 /* IPv6 reverse lookup with byte
205 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
208 * Resolver "pfcode" values. Used by dig.
210 #define RES_PRF_STATS 0x00000001
211 #define RES_PRF_UPDATE 0x00000002
212 #define RES_PRF_CLASS 0x00000004
213 #define RES_PRF_CMD 0x00000008
214 #define RES_PRF_QUES 0x00000010
215 #define RES_PRF_ANS 0x00000020
216 #define RES_PRF_AUTH 0x00000040
217 #define RES_PRF_ADD 0x00000080
218 #define RES_PRF_HEAD1 0x00000100
219 #define RES_PRF_HEAD2 0x00000200
220 #define RES_PRF_TTLID 0x00000400
221 #define RES_PRF_HEADX 0x00000800
222 #define RES_PRF_QUERY 0x00001000
223 #define RES_PRF_REPLY 0x00002000
224 #define RES_PRF_INIT 0x00004000
227 /* Things involving an internal (static) resolver context. */
229 extern struct __res_state
*__res_state(void) __attribute__ ((__const__
));
231 #define _res (*__res_state())
233 #ifndef __BIND_NOSTATIC
234 #define fp_nquery __fp_nquery
235 #define fp_query __fp_query
236 #define hostalias __hostalias
237 #define p_query __p_query
238 #define res_close __res_close
239 #define res_init __res_init
240 #define res_isourserver __res_isourserver
241 #define res_mkquery __res_mkquery
242 #define res_query __res_query
243 #define res_querydomain __res_querydomain
244 #define res_search __res_search
245 #define res_send __res_send
248 void fp_nquery
__P((const u_char
*, int, FILE *));
249 void fp_query
__P((const u_char
*, FILE *));
250 const char * hostalias
__P((const char *));
251 void p_query
__P((const u_char
*));
252 void res_close
__P((void));
253 int res_init
__P((void));
254 int res_isourserver
__P((const struct sockaddr_in
*));
255 int res_mkquery
__P((int, const char *, int, int, const u_char
*,
256 int, const u_char
*, u_char
*, int));
257 int res_query
__P((const char *, int, int, u_char
*, int));
258 int res_querydomain
__P((const char *, const char *, int, int,
260 int res_search
__P((const char *, int, int, u_char
*, int));
261 int res_send
__P((const u_char
*, int, u_char
*, int));
265 #define b64_ntop __b64_ntop
266 #define b64_pton __b64_pton
267 #define dn_comp __dn_comp
268 #define dn_count_labels __dn_count_labels
269 #define dn_expand __dn_expand
270 #define dn_skipname __dn_skipname
271 #define fp_resstat __fp_resstat
272 #define loc_aton __loc_aton
273 #define loc_ntoa __loc_ntoa
274 #define p_cdname __p_cdname
275 #define p_cdnname __p_cdnname
276 #define p_class __p_class
277 #define p_fqname __p_fqname
278 #define p_fqnname __p_fqnname
279 #define p_option __p_option
280 #define p_secstodate __p_secstodate
281 #define p_section __p_section
282 #define p_time __p_time
283 #define p_type __p_type
284 #define p_rcode __p_rcode
285 #define putlong __putlong
286 #define putshort __putshort
287 #define res_dnok __res_dnok
288 #define res_hnok __res_hnok
289 #define res_hostalias __res_hostalias
290 #define res_mailok __res_mailok
291 #define res_nameinquery __res_nameinquery
292 #define res_nclose __res_nclose
293 #define res_ninit __res_ninit
294 #define res_nmkquery __res_nmkquery
295 #define res_npquery __res_npquery
296 #define res_nquery __res_nquery
297 #define res_nquerydomain __res_nquerydomain
298 #define res_nsearch __res_nsearch
299 #define res_nsend __res_nsend
300 #define res_nisourserver __res_nisourserver
301 #define res_ownok __res_ownok
302 #define res_queriesmatch __res_queriesmatch
303 #define res_randomid __res_randomid
304 #define sym_ntop __sym_ntop
305 #define sym_ntos __sym_ntos
306 #define sym_ston __sym_ston
308 int res_hnok
__P((const char *));
309 int res_ownok
__P((const char *));
310 int res_mailok
__P((const char *));
311 int res_dnok
__P((const char *));
312 int sym_ston
__P((const struct res_sym
*, const char *, int *));
313 const char * sym_ntos
__P((const struct res_sym
*, int, int *));
314 const char * sym_ntop
__P((const struct res_sym
*, int, int *));
315 int b64_ntop
__P((u_char
const *, size_t, char *, size_t));
316 int b64_pton
__P((char const *, u_char
*, size_t));
317 int loc_aton
__P((const char *ascii
, u_char
*binary
));
318 const char * loc_ntoa
__P((const u_char
*binary
, char *ascii
));
319 int dn_skipname
__P((const u_char
*, const u_char
*));
320 void putlong
__P((u_int32_t
, u_char
*));
321 void putshort
__P((u_int16_t
, u_char
*));
322 const char * p_class
__P((int));
323 const char * p_time
__P((u_int32_t
));
324 const char * p_type
__P((int));
325 const char * p_rcode
__P((int));
326 const u_char
* p_cdnname
__P((const u_char
*, const u_char
*, int, FILE *));
327 const u_char
* p_cdname
__P((const u_char
*, const u_char
*, FILE *));
328 const u_char
* p_fqnname
__P((const u_char
*cp
, const u_char
*msg
,
330 const u_char
* p_fqname
__P((const u_char
*, const u_char
*, FILE *));
331 const char * p_option
__P((u_long option
));
332 char * p_secstodate
__P((u_long
));
333 int dn_count_labels
__P((const char *));
334 int dn_comp
__P((const char *, u_char
*, int,
335 u_char
**, u_char
**));
336 int dn_expand
__P((const u_char
*, const u_char
*, const u_char
*,
338 u_int res_randomid
__P((void));
339 int res_nameinquery
__P((const char *, int, int,
340 const u_char
*, const u_char
*));
341 int res_queriesmatch
__P((const u_char
*, const u_char
*,
342 const u_char
*, const u_char
*));
343 const char * p_section
__P((int section
, int opcode
));
344 /* Things involving a resolver context. */
345 int res_ninit
__P((res_state
));
346 int res_nisourserver
__P((const res_state
,
347 const struct sockaddr_in
*));
348 void fp_resstat
__P((const res_state
, FILE *));
349 void res_npquery
__P((const res_state
, const u_char
*, int, FILE *));
350 const char * res_hostalias
__P((const res_state
, const char *,
352 int res_nquery
__P((res_state
,
353 const char *, int, int, u_char
*, int));
354 int res_nsearch
__P((res_state
, const char *, int,
355 int, u_char
*, int));
356 int res_nquerydomain
__P((res_state
,
357 const char *, const char *, int, int,
359 int res_nmkquery
__P((res_state
,
360 int, const char *, int, int, const u_char
*,
361 int, const u_char
*, u_char
*, int));
362 int res_nsend
__P((res_state
, const u_char
*, int, u_char
*, int));
363 void res_nclose
__P((res_state
));
367 #endif /* !_RESOLV_H_ */