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
54/* These headers are needed for types used in the `struct res_state'
55 declaration. */
56#include <sys/types.h>
57#include <netinet/in.h>
58
59#ifndef __need_res_state
60# define _RESOLV_H_
61
62# include <sys/param.h>
63# include <sys/cdefs.h>
64# include <stdio.h>
65# include <arpa/nameser.h>
66#endif
67
68#ifndef __res_state_defined
69# define __res_state_defined
70
71/*
72 * Global defines and variables for resolver stub.
73 */
74# define MAXNS 3 /* max # name servers we'll track */
75# define MAXDFLSRCH 3 /* # default domain levels to try */
76# define MAXDNSRCH 6 /* max # domains in search path */
77# define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
78
79# define RES_TIMEOUT 5 /* min. seconds between retries */
80# define MAXRESOLVSORT 10 /* number of net to sort on */
81# define RES_MAXNDOTS 15 /* should reflect bit field size */
82# define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */
83# define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */
84# define RES_DFLRETRY 2 /* Default #/tries. */
85# define RES_MAXTIME 65535 /* Infinity, in milliseconds. */
86
87struct __res_state {
88 int retrans; /* retransmition time interval */
89 int retry; /* number of times to retransmit */
90 unsigned long options; /* option flags - see below. */
91 int nscount; /* number of name servers */
92 struct sockaddr_in
93 nsaddr_list[MAXNS]; /* address of name server */
94# define nsaddr nsaddr_list[0] /* for backward compatibility */
95 unsigned short id; /* current message id */
96 /* 2 byte hole here. */
97 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
98 char defdname[256]; /* default domain (deprecated) */
99 unsigned long pfcode; /* RES_PRF_ flags - see below. */
100 unsigned ndots:4; /* threshold for initial abs. query */
101 unsigned nsort:4; /* number of elements in sort_list[] */
102 unsigned ipv6_unavail:1; /* connecting to IPv6 server failed */
103 unsigned unused:23;
104 struct {
105 struct in_addr addr;
106 uint32_t mask;
107 } sort_list[MAXRESOLVSORT];
108 /* 4 byte hole here on 64-bit architectures. */
109 void * __glibc_unused_qhook;
110 void * __glibc_unused_rhook;
111 int res_h_errno; /* last one set for this context */
112 int _vcsock; /* PRIVATE: for res_send VC i/o */
113 unsigned int _flags; /* PRIVATE: see below */
114 /* 4 byte hole here on 64-bit architectures. */
115 union {
116 char pad[52]; /* On an i386 this means 512b total. */
117 struct {
118 uint16_t nscount;
119 uint16_t nsmap[MAXNS];
120 int nssocks[MAXNS];
121 uint16_t nscount6;
122 uint16_t nsinit;
123 struct sockaddr_in6 *nsaddrs[MAXNS];
124#ifdef _LIBC
125 unsigned long long int initstamp
126 __attribute__((packed));
127#else
128 unsigned int _initstamp[2];
129#endif
130 } _ext;
131 } _u;
132};
133
134typedef struct __res_state *res_state;
135# undef __need_res_state
136#endif
137
138#ifdef _RESOLV_H_
139/*
140 * Revision information. This is the release date in YYYYMMDD format.
141 * It can change every day so the right thing to do with it is use it
142 * in preprocessor commands such as "#if (__RES > 19931104)". Do not
143 * compare for equality; rather, use it to determine whether your resolver
144 * is new enough to contain a certain feature.
145 */
146
147#define __RES 19991006
148
149/*
150 * Resolver configuration file.
151 * Normally not present, but may contain the address of the
152 * inital name server(s) to query and the domain search list.
153 */
154
155#ifndef _PATH_RESCONF
156#define _PATH_RESCONF "/etc/resolv.conf"
157#endif
158
159struct res_sym {
160 int number; /* Identifying number, like T_MX */
161 char * name; /* Its symbolic name, like "MX" */
162 char * humanname; /* Its fun name, like "mail exchanger" */
163};
164
165/*
166 * Resolver flags (used to be discrete per-module statics ints).
167 */
168#define RES_F_VC 0x00000001 /* socket is TCP */
169#define RES_F_CONN 0x00000002 /* socket is connected */
170#define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors */
171
172/* res_findzonecut() options */
173#define RES_EXHAUSTIVE 0x00000001 /* always do all queries */
174
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 \
181 __glibc_macro_warning ("RES_AAONLY is deprecated") 0x00000004
182#define RES_USEVC 0x00000008 /* use virtual circuit */
183#define RES_PRIMARY \
184 __glibc_macro_warning ("RES_PRIMARY is deprecated") 0x00000010
185#define RES_IGNTC 0x00000020 /* ignore trucation errors */
186#define RES_RECURSE 0x00000040 /* recursion desired */
187#define RES_DEFNAMES 0x00000080 /* use default domain name */
188#define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
189#define RES_DNSRCH 0x00000200 /* search up local domain tree */
190#define RES_INSECURE1 0x00000400 /* type 1 security disabled */
191#define RES_INSECURE2 0x00000800 /* type 2 security disabled */
192#define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
193#define RES_USE_INET6 \
194 __glibc_macro_warning ("RES_USE_INET6 is deprecated") 0x00002000
195#define RES_ROTATE 0x00004000 /* rotate ns list after each query */
196#define RES_NOCHECKNAME \
197 __glibc_macro_warning ("RES_NOCHECKNAME is deprecated") 0x00008000
198#define RES_KEEPTSIG \
199 __glibc_macro_warning ("RES_KEEPTSIG is deprecated") 0x00010000
200#define RES_BLAST \
201 __glibc_macro_warning ("RES_BLAST is deprecated") 0x00020000
202#define RES_USE_EDNS0 0x00100000 /* Use EDNS0. */
203#define RES_SNGLKUP 0x00200000 /* one outstanding request at a time */
204#define RES_SNGLKUPREOP 0x00400000 /* -"-, but open new socket for each
205 request */
206#define RES_USE_DNSSEC 0x00800000 /* use DNSSEC using OK bit in OPT */
207#define RES_NOTLDQUERY 0x01000000 /* Do not look up unqualified name
208 as a TLD. */
209
210#define RES_DEFAULT (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH)
211
212/*
213 * Resolver "pfcode" values. Used by dig.
214 */
215#define RES_PRF_STATS 0x00000001
216#define RES_PRF_UPDATE 0x00000002
217#define RES_PRF_CLASS 0x00000004
218#define RES_PRF_CMD 0x00000008
219#define RES_PRF_QUES 0x00000010
220#define RES_PRF_ANS 0x00000020
221#define RES_PRF_AUTH 0x00000040
222#define RES_PRF_ADD 0x00000080
223#define RES_PRF_HEAD1 0x00000100
224#define RES_PRF_HEAD2 0x00000200
225#define RES_PRF_TTLID 0x00000400
226#define RES_PRF_HEADX 0x00000800
227#define RES_PRF_QUERY 0x00001000
228#define RES_PRF_REPLY 0x00002000
229#define RES_PRF_INIT 0x00004000
230/* 0x00008000 */
231
232/* Things involving an internal (static) resolver context. */
233__BEGIN_DECLS
234extern struct __res_state *__res_state(void) __attribute__ ((__const__));
235__END_DECLS
236#define _res (*__res_state())
237
238#define fp_nquery __fp_nquery
239#define fp_query __fp_query
240#define hostalias __hostalias
241#define p_query __p_query
242#define res_close __res_close
243#define res_init __res_init
244#define res_isourserver __res_isourserver
245#define res_mkquery __res_mkquery
246#define res_query __res_query
247#define res_querydomain __res_querydomain
248#define res_search __res_search
249#define res_send __res_send
250
251__BEGIN_DECLS
252void fp_nquery (const unsigned char *, int, FILE *) __THROW;
253void fp_query (const unsigned char *, FILE *) __THROW;
254const char * hostalias (const char *) __THROW;
255void p_query (const unsigned char *) __THROW;
256void res_close (void) __THROW;
257int res_init (void) __THROW;
258int res_isourserver (const struct sockaddr_in *) __THROW;
259int res_mkquery (int, const char *, int, int,
260 const unsigned char *, int, const unsigned char *,
261 unsigned char *, int) __THROW;
262int res_query (const char *, int, int, unsigned char *, int)
263 __THROW;
264int res_querydomain (const char *, const char *, int, int,
265 unsigned char *, int) __THROW;
266int res_search (const char *, int, int, unsigned char *, int)
267 __THROW;
268int res_send (const unsigned char *, int, unsigned char *, int)
269 __THROW;
270__END_DECLS
271
272#define b64_ntop __b64_ntop
273#define b64_pton __b64_pton
274#define dn_comp __dn_comp
275#define dn_count_labels __dn_count_labels
276#define dn_expand __dn_expand
277#define dn_skipname __dn_skipname
278#define fp_resstat __fp_resstat
279#define loc_aton __loc_aton
280#define loc_ntoa __loc_ntoa
281#define p_cdname __p_cdname
282#define p_cdnname __p_cdnname
283#define p_class __p_class
284#define p_fqname __p_fqname
285#define p_fqnname __p_fqnname
286#define p_option __p_option
287#define p_secstodate __p_secstodate
288#define p_section __p_section
289#define p_time __p_time
290#define p_type __p_type
291#define p_rcode __p_rcode
292#define putlong __putlong
293#define putshort __putshort
294#define res_dnok __res_dnok
295#define res_hnok __res_hnok
296#define res_hostalias __res_hostalias
297#define res_mailok __res_mailok
298#define res_nameinquery __res_nameinquery
299#define res_nclose __res_nclose
300#define res_ninit __res_ninit
301#define res_nmkquery __res_nmkquery
302#define res_npquery __res_npquery
303#define res_nquery __res_nquery
304#define res_nquerydomain __res_nquerydomain
305#define res_nsearch __res_nsearch
306#define res_nsend __res_nsend
307#define res_nisourserver __res_nisourserver
308#define res_ownok __res_ownok
309#define res_queriesmatch __res_queriesmatch
310#define res_randomid __res_randomid
311#define sym_ntop __sym_ntop
312#define sym_ntos __sym_ntos
313#define sym_ston __sym_ston
314__BEGIN_DECLS
315int res_hnok (const char *) __THROW;
316int res_ownok (const char *) __THROW;
317int res_mailok (const char *) __THROW;
318int res_dnok (const char *) __THROW;
319int sym_ston (const struct res_sym *, const char *, int *) __THROW;
320const char * sym_ntos (const struct res_sym *, int, int *) __THROW;
321const char * sym_ntop (const struct res_sym *, int, int *) __THROW;
322int b64_ntop (const unsigned char *, size_t, char *, size_t)
323 __THROW;
324int b64_pton (char const *, unsigned char *, size_t) __THROW;
325int loc_aton (const char *__ascii, unsigned char *__binary) __THROW;
326const char * loc_ntoa (const unsigned char *__binary, char *__ascii) __THROW;
327int dn_skipname (const unsigned char *, const unsigned char *)
328 __THROW;
329void putlong (uint32_t, unsigned char *) __THROW;
330void putshort (uint16_t, unsigned char *) __THROW;
331const char * p_class (int) __THROW;
332const char * p_time (uint32_t) __THROW;
333const char * p_type (int) __THROW;
334const char * p_rcode (int) __THROW;
335const unsigned char * p_cdnname (const unsigned char *,
336 const unsigned char *, int, FILE *) __THROW;
337const unsigned char * p_cdname (const unsigned char *, const unsigned char *,
338 FILE *) __THROW;
339const unsigned char * p_fqnname (const unsigned char *__cp,
340 const unsigned char *__msg,
341 int, char *, int) __THROW;
342const unsigned char * p_fqname (const unsigned char *,
343 const unsigned char *, FILE *) __THROW;
344const char * p_option (unsigned long __option) __THROW;
345char * p_secstodate (unsigned long) __THROW;
346int dn_count_labels (const char *) __THROW;
347int dn_comp (const char *, unsigned char *, int, unsigned char **,
348 unsigned char **) __THROW;
349int dn_expand (const unsigned char *, const unsigned char *,
350 const unsigned char *, char *, int) __THROW;
351unsigned int res_randomid (void) __THROW;
352int res_nameinquery (const char *, int, int,
353 const unsigned char *,
354 const unsigned char *) __THROW;
355int res_queriesmatch (const unsigned char *,
356 const unsigned char *,
357 const unsigned char *,
358 const unsigned char *) __THROW;
359const char * p_section (int __section, int __opcode) __THROW;
360/* Things involving a resolver context. */
361int res_ninit (res_state) __THROW;
362int res_nisourserver (const res_state,
363 const struct sockaddr_in *) __THROW;
364void fp_resstat (const res_state, FILE *) __THROW;
365void res_npquery (const res_state, const unsigned char *, int,
366 FILE *) __THROW;
367const char * res_hostalias (const res_state, const char *, char *, size_t)
368 __THROW;
369int res_nquery (res_state, const char *, int, int,
370 unsigned char *, int) __THROW;
371int res_nsearch (res_state, const char *, int, int,
372 unsigned char *, int) __THROW;
373int res_nquerydomain (res_state, const char *, const char *, int,
374 int, unsigned char *, int) __THROW;
375int res_nmkquery (res_state, int, const char *, int, int,
376 const unsigned char *, int,
377 const unsigned char *, unsigned char *, int)
378 __THROW;
379int res_nsend (res_state, const unsigned char *, int,
380 unsigned char *, int) __THROW;
381void res_nclose (res_state) __THROW;
382__END_DECLS
383#endif
384
385#endif /* !_RESOLV_H_ */
386