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52 * @(#)resolv.h 8.1 (Berkeley) 6/2/93
53 * From Id: resolv.h,v 8.12 1998/04/28 19:36:46 halley Exp $
54 * $Id: resolv.h,v 1.1.1.1 2003/11/19 01:48:35 kyu3 Exp $
60 #include <arpa/nameser.h>
61 #include <sys/param.h>
62 #include <sys/types.h>
63 #include <sys/cdefs.h>
72 * Revision information. This is the release date in YYYYMMDD format.
73 * It can change every day so the right thing to do with it is use it
74 * in preprocessor commands such as "#if (__RES > 19931104)". Do not
75 * compare for equality; rather, use it to determine whether your resolver
76 * is new enough to contain a certain feature.
79 #define __RES 19960801
82 * Global defines and variables for resolver stub.
84 #define MAXNS 3 /* max # name servers we'll track */
85 #define MAXDFLSRCH 3 /* # default domain levels to try */
86 #define MAXDNSRCH 6 /* max # domains in search path */
87 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
89 #define RES_TIMEOUT 5 /* min. seconds between retries */
90 #define MAXRESOLVSORT 10 /* number of net to sort on */
91 #define RES_MAXNDOTS 15 /* should reflect bit field size */
94 int retrans
; /* retransmition time interval */
95 int retry
; /* number of times to retransmit */
96 u_long options
; /* option flags - see below. */
97 int nscount
; /* number of name servers */
99 nsaddr_list
[MAXNS
]; /* address of name server */
100 #define nsaddr nsaddr_list[0] /* for backward compatibility */
101 u_short id
; /* current message id */
102 char *dnsrch
[MAXDNSRCH
+1]; /* components of domain to search */
103 char defdname
[256]; /* default domain (deprecated) */
104 u_long pfcode
; /* RES_PRF_ flags - see below. */
105 unsigned ndots
:4; /* threshold for initial abs. query */
106 unsigned nsort
:4; /* number of elements in sort_list[] */
111 } sort_list
[MAXRESOLVSORT
];
112 char pad
[72]; /* on an i386 this means 512b total */
115 typedef struct __res_state
*res_state
;
118 * Resolver options (keep these in synch with res_debug.c, please)
120 #define RES_INIT 0x00000001 /* address initialized */
121 #define RES_DEBUG 0x00000002 /* print debug messages */
122 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/
123 #define RES_USEVC 0x00000008 /* use virtual circuit */
124 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */
125 #define RES_IGNTC 0x00000020 /* ignore truncation errors */
126 #define RES_RECURSE 0x00000040 /* recursion desired */
127 #define RES_DEFNAMES 0x00000080 /* use default domain name */
128 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
129 #define RES_DNSRCH 0x00000200 /* search up local domain tree */
130 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */
131 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */
132 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
133 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
134 #define RES_NOTLDQUERY 0x00004000 /* Don't query TLD names */
136 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
139 * Resolver "pfcode" values. Used by dig.
141 #define RES_PRF_STATS 0x00000001
142 #define RES_PRF_UPDATE 0x00000002
143 #define RES_PRF_CLASS 0x00000004
144 #define RES_PRF_CMD 0x00000008
145 #define RES_PRF_QUES 0x00000010
146 #define RES_PRF_ANS 0x00000020
147 #define RES_PRF_AUTH 0x00000040
148 #define RES_PRF_ADD 0x00000080
149 #define RES_PRF_HEAD1 0x00000100
150 #define RES_PRF_HEAD2 0x00000200
151 #define RES_PRF_TTLID 0x00000400
152 #define RES_PRF_HEADX 0x00000800
153 #define RES_PRF_QUERY 0x00001000
154 #define RES_PRF_REPLY 0x00002000
155 #define RES_PRF_INIT 0x00004000
158 typedef enum { res_goahead
, res_nextns
, res_modified
, res_done
, res_error
}
161 typedef res_sendhookact (*res_send_qhook
)__P((struct sockaddr_in
* const *ns
,
162 const u_char
**query
,
168 typedef res_sendhookact (*res_send_rhook
)__P((const struct sockaddr_in
*ns
,
176 int number
; /* Identifying number, like T_MX */
177 char * name
; /* Its symbolic name, like "MX" */
178 char * humanname
; /* Its fun name, like "mail exchanger" */
181 extern struct __res_state _res
;
182 extern const struct res_sym __p_class_syms
[];
183 extern const struct res_sym __p_type_syms
[];
185 /* Private routines shared between libc/net, named, nslookup and others. */
186 #define res_hnok __res_hnok
187 #define res_ownok __res_ownok
188 #define res_mailok __res_mailok
189 #define res_dnok __res_dnok
190 #define sym_ston __sym_ston
191 #define sym_ntos __sym_ntos
192 #define sym_ntop __sym_ntop
193 #define b64_ntop __b64_ntop
194 #define b64_pton __b64_pton
195 #define loc_ntoa __loc_ntoa
196 #define loc_aton __loc_aton
197 #define fp_resstat __fp_resstat
198 #define p_query __p_query
199 #define dn_skipname __dn_skipname
200 #define fp_resstat __fp_resstat
201 #define fp_query __fp_query
202 #define fp_nquery __fp_nquery
203 #define hostalias __hostalias
204 #define putlong __putlong
205 #define putshort __putshort
206 uint16_t _getshort(const u_char
*);
207 #define p_class __p_class
208 #define p_time __p_time
209 #define p_type __p_type
210 #define p_query __p_query
211 #define p_cdnname __p_cdnname
212 #define p_section __p_section
213 #define p_cdname __p_cdname
214 #define p_fqnname __p_fqnname
215 #define p_fqname __p_fqname
216 #define p_option __p_option
217 #define p_secstodate __p_secstodate
218 #define dn_count_labels __dn_count_labels
219 #define dn_comp __dn_comp
220 #define dn_expand __dn_expand
221 #define res_init __res_init
222 #define res_randomid __res_randomid
223 #define res_query __res_query
224 #define res_search __res_search
225 #define res_querydomain __res_querydomain
226 #define res_mkquery __res_mkquery
227 #define res_send __res_send
228 #define res_isourserver __res_isourserver
229 #define res_nameinquery __res_nameinquery
230 #define res_queriesmatch __res_queriesmatch
231 #define res_close __res_close
232 #define res_mkupdate __res_mkupdate
233 #define res_mkupdrec __res_mkupdrec
234 #define res_freeupdrec __res_freeupdrec
237 int res_hnok
__P((const char *));
238 int res_ownok
__P((const char *));
239 int res_mailok
__P((const char *));
240 int res_dnok
__P((const char *));
241 int sym_ston
__P((const struct res_sym
*, const char *, int *));
242 const char * sym_ntos
__P((const struct res_sym
*, int, int *));
243 const char * sym_ntop
__P((const struct res_sym
*, int, int *));
244 int b64_ntop
__P((u_char
const *, size_t, char *, size_t));
245 int b64_pton
__P((char const *, u_char
*, size_t));
246 int loc_aton
__P((const char *, u_char
*));
247 const char * loc_ntoa
__P((const u_char
*, char *));
248 int dn_skipname
__P((const u_char
*, const u_char
*));
249 void fp_resstat
__P((struct __res_state
*, FILE *));
250 void fp_query
__P((const u_char
*, FILE *));
251 void fp_nquery
__P((const u_char
*, int, FILE *));
252 const char * hostalias
__P((const char *));
253 void putlong
__P((u_int32_t
, u_char
*));
254 void putshort
__P((u_int16_t
, u_char
*));
255 const char * p_class
__P((int));
256 const char * p_time
__P((u_int32_t
));
257 const char * p_type
__P((int));
258 void p_query
__P((const u_char
*));
259 const u_char
* p_cdnname
__P((const u_char
*, const u_char
*, int, FILE *));
260 const u_char
* p_cdname
__P((const u_char
*, const u_char
*, FILE *));
261 const u_char
* p_fqnname
__P((const u_char
*, const u_char
*,
263 const u_char
* p_fqname
__P((const u_char
*, const u_char
*, FILE *));
264 const char * p_option
__P((u_long
));
265 char * p_secstodate
__P((u_long
));
266 int dn_count_labels
__P((const char *));
267 int dn_comp
__P((const char *, u_char
*, int,
268 u_char
**, u_char
**));
269 int dn_expand
__P((const u_char
*, const u_char
*, const u_char
*,
271 int res_init
__P((void));
272 u_int res_randomid
__P((void));
273 int res_query
__P((const char *, int, int, u_char
*, int));
274 int res_search
__P((const char *, int, int, u_char
*, int));
275 int res_querydomain
__P((const char *, const char *, int, int,
277 int res_mkquery
__P((int, const char *, int, int, const u_char
*,
278 int, const u_char
*, u_char
*, int));
279 int res_send
__P((const u_char
*, int, u_char
*, int));
280 int res_isourserver
__P((const struct sockaddr_in
*));
281 int res_nameinquery
__P((const char *, int, int,
282 const u_char
*, const u_char
*));
283 int res_queriesmatch
__P((const u_char
*, const u_char
*,
284 const u_char
*, const u_char
*));
285 void res_close
__P((void));
286 const char * p_section
__P((int, int));
287 /* XXX The following depend on the ns_updrec typedef in arpa/nameser.h */
288 #ifdef _ARPA_NAMESER_H_
289 int res_update
__P((ns_updrec
*));
290 int res_mkupdate
__P((ns_updrec
*, u_char
*, int));
291 ns_updrec
* res_mkupdrec
__P((int, const char *, u_int
, u_int
, u_long
));
292 void res_freeupdrec
__P((ns_updrec
*));
297 #endif /* !_RESOLV_H_ */