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/*
31 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
32 *
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.
36 *
37 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
38 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
40 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
41 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
42 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
43 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
44 * SOFTWARE.
45 */
46
47/*
48 * @(#)resolv.h 8.1 (Berkeley) 6/2/93
49 * $BINDId: resolv.h,v 8.31 2000/03/30 20:16:50 vixie Exp $
50 */
51
52#ifndef _RESOLV_H_
53#define _RESOLV_H_
54
55#include <sys/cdefs.h>
56#include <sys/param.h>
57#include <sys/types.h>
58#include <stdio.h>
59#include <netinet/in.h>
60#include <arpa/nameser.h>
61#include <bits/types/res_state.h>
62
63/*
64 * Global defines and variables for resolver stub.
65 */
66#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
67
68#define RES_TIMEOUT 5 /* min. seconds between retries */
69#define RES_MAXNDOTS 15 /* should reflect bit field size */
70#define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */
71#define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */
72#define RES_DFLRETRY 2 /* Default #/tries. */
73#define RES_MAXTIME 65535 /* Infinity, in milliseconds. */
74
75#define nsaddr nsaddr_list[0] /* for backward compatibility */
76
77/*
78 * Revision information. This is the release date in YYYYMMDD format.
79 * It can change every day so the right thing to do with it is use it
80 * in preprocessor commands such as "#if (__RES > 19931104)". Do not
81 * compare for equality; rather, use it to determine whether your resolver
82 * is new enough to contain a certain feature.
83 */
84
85#define __RES 19991006
86
87/*
88 * Resolver configuration file.
89 * Normally not present, but may contain the address of the
90 * initial name server(s) to query and the domain search list.
91 */
92
93#ifndef _PATH_RESCONF
94#define _PATH_RESCONF "/etc/resolv.conf"
95#endif
96
97struct res_sym {
98 int number; /* Identifying number, like T_MX */
99 char * name; /* Its symbolic name, like "MX" */
100 char * humanname; /* Its fun name, like "mail exchanger" */
101};
102
103/*
104 * Resolver options (keep these in synch with res_debug.c, please)
105 */
106#define RES_INIT 0x00000001 /* address initialized */
107#define RES_DEBUG 0x00000002 /* print debug messages */
108#define RES_AAONLY \
109 __glibc_macro_warning ("RES_AAONLY is deprecated") 0x00000004
110#define RES_USEVC 0x00000008 /* use virtual circuit */
111#define RES_PRIMARY \
112 __glibc_macro_warning ("RES_PRIMARY is deprecated") 0x00000010
113#define RES_IGNTC 0x00000020 /* ignore trucation errors */
114#define RES_RECURSE 0x00000040 /* recursion desired */
115#define RES_DEFNAMES 0x00000080 /* use default domain name */
116#define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
117#define RES_DNSRCH 0x00000200 /* search up local domain tree */
118#define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
119#define RES_ROTATE 0x00004000 /* rotate ns list after each query */
120#define RES_NOCHECKNAME \
121 __glibc_macro_warning ("RES_NOCHECKNAME is deprecated") 0x00008000
122#define RES_KEEPTSIG \
123 __glibc_macro_warning ("RES_KEEPTSIG is deprecated") 0x00010000
124#define RES_BLAST \
125 __glibc_macro_warning ("RES_BLAST is deprecated") 0x00020000
126#define RES_USE_EDNS0 0x00100000 /* Use EDNS0. */
127#define RES_SNGLKUP 0x00200000 /* one outstanding request at a time */
128#define RES_SNGLKUPREOP 0x00400000 /* -"-, but open new socket for each
129 request */
130#define RES_USE_DNSSEC 0x00800000 /* use DNSSEC using OK bit in OPT */
131#define RES_NOTLDQUERY 0x01000000 /* Do not look up unqualified name
132 as a TLD. */
133#define RES_NORELOAD 0x02000000 /* No automatic configuration reload. */
134#define RES_TRUSTAD 0x04000000 /* Request AD bit, keep it in responses. */
135#define RES_NOAAAA 0x08000000 /* Suppress AAAA queries. */
136#define RES_STRICTERR 0x10000000 /* Report more DNS errors as errors. */
137
138#define RES_DEFAULT (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH)
139
140/*
141 * Resolver "pfcode" values. Used by dig.
142 */
143#define RES_PRF_STATS 0x00000001
144#define RES_PRF_UPDATE 0x00000002
145#define RES_PRF_CLASS 0x00000004
146#define RES_PRF_CMD 0x00000008
147#define RES_PRF_QUES 0x00000010
148#define RES_PRF_ANS 0x00000020
149#define RES_PRF_AUTH 0x00000040
150#define RES_PRF_ADD 0x00000080
151#define RES_PRF_HEAD1 0x00000100
152#define RES_PRF_HEAD2 0x00000200
153#define RES_PRF_TTLID 0x00000400
154#define RES_PRF_HEADX 0x00000800
155#define RES_PRF_QUERY 0x00001000
156#define RES_PRF_REPLY 0x00002000
157#define RES_PRF_INIT 0x00004000
158/* 0x00008000 */
159
160/* Things involving an internal (static) resolver context. */
161__BEGIN_DECLS
162extern struct __res_state *__res_state(void) __attribute__ ((__const__));
163__END_DECLS
164#define _res (*__res_state())
165
166#define fp_nquery __fp_nquery
167#define fp_query __fp_query
168#define hostalias __hostalias
169#define p_query __p_query
170#define res_close __res_close
171#define res_init __res_init
172#define res_isourserver __res_isourserver
173
174/* zig patch: In glibc 2.33 and earlier res_search, res_nsearch, res_query, res_nquery,
175 * res_querydomain, res_nquerydomain, dn_skipname, dn_comp, dn_expand were
176 * #define'd to __res_search, __res_nsearch, etc. glibc 2.34 onwards removes
177 * the macros and exposes the symbols directly. New glibc exposes compat
178 * symbols with underscores for backwards compatibility. Applications linked to
179 * glibc 2.34+ are expected to use the non-underscored symbols.
180 *
181 * It is enough to bring the macros back when compiling against the older glibc
182 * versions.
183 *
184 * See glibc commits:
185 * - ea9878ec271c791880fcbbe519d70c42f8113750 res_*
186 * - 391e02236b931132c0e8b5ba4c3b087c2aaa1044 dn_skipname
187 * - fd8a87c0c1932de591e7ad108ff6288a4b6b18c9 dn_comp
188 * - 640bbdf71c6f10ac26252ac67a22902e26657bd8 dn_expand
189 */
190#if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 34)
191#define res_search __res_search
192#define res_nsearch __res_nsearch
193#define res_query __res_query
194#define res_nquery __res_nquery
195#define res_querydomain __res_querydomain
196#define res_nquerydomain __res_nquerydomain
197#define dn_skipname __dn_skipname
198#define dn_comp __dn_comp
199#define dn_expand __dn_expand
200#endif
201/* end glibc compat hacks */
202
203#ifdef _LIBC
204# define __RESOLV_DEPRECATED
205# define __RESOLV_DEPRECATED_MSG(msg)
206#else
207# define __RESOLV_DEPRECATED __attribute_deprecated__
208# define __RESOLV_DEPRECATED_MSG(msg) __attribute_deprecated_msg__ (msg)
209#endif
210
211__BEGIN_DECLS
212void fp_nquery (const unsigned char *, int, FILE *) __THROW
213 __RESOLV_DEPRECATED;
214void fp_query (const unsigned char *, FILE *) __THROW
215 __RESOLV_DEPRECATED;
216const char * hostalias (const char *) __THROW
217 __RESOLV_DEPRECATED_MSG ("use getaddrinfo instead");
218void p_query (const unsigned char *) __THROW
219 __RESOLV_DEPRECATED;
220void res_close (void) __THROW;
221int res_init (void) __THROW;
222int res_isourserver (const struct sockaddr_in *) __THROW
223 __RESOLV_DEPRECATED;
224int res_mkquery (int, const char *, int, int,
225 const unsigned char *, int, const unsigned char *,
226 unsigned char *, int) __THROW;
227int res_query (const char *, int, int, unsigned char *, int)
228 __THROW;
229int res_querydomain (const char *, const char *, int, int,
230 unsigned char *, int) __THROW;
231int res_search (const char *, int, int, unsigned char *, int)
232 __THROW;
233int res_send (const unsigned char *, int, unsigned char *, int)
234 __THROW;
235__END_DECLS
236
237#define b64_ntop __b64_ntop
238#define b64_pton __b64_pton
239#define dn_count_labels __dn_count_labels
240#define fp_resstat __fp_resstat
241#define loc_aton __loc_aton
242#define loc_ntoa __loc_ntoa
243#define p_cdname __p_cdname
244#define p_cdnname __p_cdnname
245#define p_class __p_class
246#define p_fqname __p_fqname
247#define p_fqnname __p_fqnname
248#define p_option __p_option
249#define p_time __p_time
250#define p_type __p_type
251#define p_rcode __p_rcode
252#define putlong __putlong
253#define putshort __putshort
254#define res_hostalias __res_hostalias
255#define res_nameinquery __res_nameinquery
256#define res_nclose __res_nclose
257#define res_ninit __res_ninit
258#define res_queriesmatch __res_queriesmatch
259#define res_randomid __res_randomid
260#define sym_ntop __sym_ntop
261#define sym_ntos __sym_ntos
262#define sym_ston __sym_ston
263__BEGIN_DECLS
264int res_hnok (const char *) __THROW;
265int res_ownok (const char *) __THROW;
266int res_mailok (const char *) __THROW;
267int res_dnok (const char *) __THROW;
268int sym_ston (const struct res_sym *, const char *, int *) __THROW
269 __RESOLV_DEPRECATED;
270const char * sym_ntos (const struct res_sym *, int, int *) __THROW
271 __RESOLV_DEPRECATED;
272const char * sym_ntop (const struct res_sym *, int, int *) __THROW
273 __RESOLV_DEPRECATED;
274int b64_ntop (const unsigned char *, size_t, char *, size_t)
275 __THROW;
276int b64_pton (char const *, unsigned char *, size_t) __THROW;
277int loc_aton (const char *__ascii, unsigned char *__binary) __THROW
278 __RESOLV_DEPRECATED;
279const char * loc_ntoa (const unsigned char *__binary, char *__ascii) __THROW
280 __RESOLV_DEPRECATED;
281int dn_skipname (const unsigned char *, const unsigned char *)
282 __THROW;
283void putlong (uint32_t, unsigned char *) __THROW
284 __RESOLV_DEPRECATED_MSG ("use NS_PUT16 instead");
285void putshort (uint16_t, unsigned char *) __THROW
286 __RESOLV_DEPRECATED_MSG ("use NS_PUT32 instead");
287const char * p_class (int) __THROW __RESOLV_DEPRECATED;
288const char * p_time (uint32_t) __THROW __RESOLV_DEPRECATED;
289const char * p_type (int) __THROW __RESOLV_DEPRECATED;
290const char * p_rcode (int) __THROW __RESOLV_DEPRECATED;
291const unsigned char * p_cdnname (const unsigned char *, const unsigned char *,
292 int, FILE *) __THROW __RESOLV_DEPRECATED;
293const unsigned char * p_cdname (const unsigned char *, const unsigned char *,
294 FILE *) __THROW __RESOLV_DEPRECATED;
295const unsigned char * p_fqnname (const unsigned char *__cp,
296 const unsigned char *__msg,
297 int, char *, int) __THROW __RESOLV_DEPRECATED;
298const unsigned char * p_fqname (const unsigned char *, const unsigned char *,
299 FILE *) __THROW __RESOLV_DEPRECATED;
300const char * p_option (unsigned long __option) __THROW __RESOLV_DEPRECATED;
301int dn_count_labels (const char *) __THROW __RESOLV_DEPRECATED;
302int dn_comp (const char *, unsigned char *, int, unsigned char **,
303 unsigned char **) __THROW;
304int dn_expand (const unsigned char *, const unsigned char *,
305 const unsigned char *, char *, int) __THROW;
306unsigned int res_randomid (void) __THROW
307 __RESOLV_DEPRECATED_MSG ("use getentropy instead");
308int res_nameinquery (const char *, int, int,
309 const unsigned char *,
310 const unsigned char *) __THROW
311 __RESOLV_DEPRECATED;
312int res_queriesmatch (const unsigned char *,
313 const unsigned char *,
314 const unsigned char *,
315 const unsigned char *) __THROW
316 __RESOLV_DEPRECATED;
317/* Things involving a resolver context. */
318int res_ninit (res_state) __THROW;
319void fp_resstat (const res_state, FILE *) __THROW
320 __RESOLV_DEPRECATED;
321const char * res_hostalias (const res_state, const char *, char *, size_t)
322 __THROW __RESOLV_DEPRECATED_MSG ("use getaddrinfo instead");
323int res_nquery (res_state, const char *, int, int,
324 unsigned char *, int) __THROW;
325int res_nsearch (res_state, const char *, int, int,
326 unsigned char *, int) __THROW;
327int res_nquerydomain (res_state, const char *, const char *, int,
328 int, unsigned char *, int) __THROW;
329int res_nmkquery (res_state, int, const char *, int, int,
330 const unsigned char *, int,
331 const unsigned char *, unsigned char *, int)
332 __THROW;
333int res_nsend (res_state, const unsigned char *, int,
334 unsigned char *, int) __THROW;
335void res_nclose (res_state) __THROW;
336
337__END_DECLS
338
339#endif /* !_RESOLV_H_ */