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comparison: other-licenses/android/resolv_private.h

other-licenses/android/resolv_private.h

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1 /* $NetBSD: resolv.h,v 1.31 2005/12/26 19:01:47 perry Exp $ */
2
3 /*
4 * Copyright (c) 1983, 1987, 1989
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
34 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
35 *
36 * Permission to use, copy, modify, and distribute this software for any
37 * purpose with or without fee is hereby granted, provided that the above
38 * copyright notice and this permission notice appear in all copies.
39 *
40 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
41 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
42 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
43 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
44 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
45 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
46 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
47 */
48
49 /*
50 * @(#)resolv.h 8.1 (Berkeley) 6/2/93
51 * Id: resolv.h,v 1.7.2.11.4.2 2004/06/25 00:41:05 marka Exp
52 */
53
54 /*
55 * This version of this file is derived from Android 2.3 "Gingerbread",
56 * which contains uncredited changes by Android/Google developers. It has
57 * been modified in 2011 for use in the Android build of Mozilla Firefox by
58 * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
59 * and Steve Workman <sjhworkman@gmail.com>).
60 * These changes are offered under the same license as the original NetBSD
61 * file, whose copyright and license are unchanged above.
62 */
63
64 #ifndef _RESOLV_PRIVATE_H_
65 #define _RESOLV_PRIVATE_H_
66
67 #include <resolv.h>
68 #include "resolv_static.h"
69
70 /*
71 * Revision information. This is the release date in YYYYMMDD format.
72 * It can change every day so the right thing to do with it is use it
73 * in preprocessor commands such as "#if (__RES > 19931104)". Do not
74 * compare for equality; rather, use it to determine whether your resolver
75 * is new enough to contain a certain feature.
76 */
77
78 #define __RES 20030124
79
80 /*
81 * This used to be defined in res_query.c, now it's in herror.c.
82 * [XXX no it's not. It's in irs/irs_data.c]
83 * It was
84 * never extern'd by any *.h file before it was placed here. For thread
85 * aware programs, the last h_errno value set is stored in res->h_errno.
86 *
87 * XXX: There doesn't seem to be a good reason for exposing RES_SET_H_ERRNO
88 * (and __h_errno_set) to the public via <resolv.h>.
89 * XXX: __h_errno_set is really part of IRS, not part of the resolver.
90 * If somebody wants to build and use a resolver that doesn't use IRS,
91 * what do they do? Perhaps something like
92 * #ifdef WANT_IRS
93 * # define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x)
94 * #else
95 * # define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x))
96 * #endif
97 */
98
99 #define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x))
100 struct __res_state; /* forward */
101
102 /*
103 * Resolver configuration file.
104 * Normally not present, but may contain the address of the
105 * initial name server(s) to query and the domain search list.
106 */
107
108 #ifndef _PATH_RESCONF
109 #ifdef ANDROID_CHANGES
110 #define _PATH_RESCONF "/etc/ppp/resolv.conf"
111 #else
112 #define _PATH_RESCONF "/etc/resolv.conf"
113 #endif
114 #endif
115
116 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
117 res_sendhookact;
118
119 typedef res_sendhookact (*res_send_qhook)(struct sockaddr * const *,
120 const u_char **, int *,
121 u_char *, int, int *);
122
123 typedef res_sendhookact (*res_send_rhook)(const struct sockaddr *,
124 const u_char *, int, u_char *,
125 int, int *);
126
127 struct res_sym {
128 int number; /* Identifying number, like T_MX */
129 const char * name; /* Its symbolic name, like "MX" */
130 const char * humanname; /* Its fun name, like "mail exchanger" */
131 };
132
133 /*
134 * Global defines and variables for resolver stub.
135 */
136 #define MAXNS 3 /* max # name servers we'll track */
137 #define MAXDFLSRCH 3 /* # default domain levels to try */
138 #define MAXDNSRCH 6 /* max # domains in search path */
139 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
140
141 #define RES_TIMEOUT 5 /* min. seconds between retries */
142 #define MAXRESOLVSORT 10 /* number of net to sort on */
143 #define RES_MAXNDOTS 15 /* should reflect bit field size */
144 #define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */
145 #define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */
146 #define RES_DFLRETRY 2 /* Default #/tries. */
147 #define RES_MAXTIME 65535 /* Infinity, in milliseconds. */
148
149 struct __res_state_ext;
150
151 struct __res_state {
152 int retrans; /* retransmission time interval */
153 int retry; /* number of times to retransmit */
154 #ifdef sun
155 u_int options; /* option flags - see below. */
156 #else
157 u_long options; /* option flags - see below. */
158 #endif
159 int nscount; /* number of name servers */
160 struct sockaddr_in
161 nsaddr_list[MAXNS]; /* address of name server */
162 #define nsaddr nsaddr_list[0] /* for backward compatibility */
163 u_short id; /* current message id */
164 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
165 char defdname[256]; /* default domain (deprecated) */
166 #ifdef sun
167 u_int pfcode; /* RES_PRF_ flags - see below. */
168 #else
169 u_long pfcode; /* RES_PRF_ flags - see below. */
170 #endif
171 unsigned ndots:4; /* threshold for initial abs. query */
172 unsigned nsort:4; /* number of elements in sort_list[] */
173 char unused[3];
174 struct {
175 struct in_addr addr;
176 uint32_t mask;
177 } sort_list[MAXRESOLVSORT];
178 #ifdef __OLD_RES_STATE
179 char lookups[4];
180 #else
181 res_send_qhook qhook; /* query hook */
182 res_send_rhook rhook; /* response hook */
183 int res_h_errno; /* last one set for this context */
184 int _vcsock; /* PRIVATE: for res_send VC i/o */
185 u_int _flags; /* PRIVATE: see below */
186 u_int _pad; /* make _u 64 bit aligned */
187 union {
188 /* On an 32-bit arch this means 512b total. */
189 char pad[72 - 4*sizeof (int) - 2*sizeof (void *)];
190 struct {
191 uint16_t nscount;
192 uint16_t nstimes[MAXNS]; /* ms. */
193 int nssocks[MAXNS];
194 struct __res_state_ext *ext; /* extention for IPv6 */
195 } _ext;
196 } _u;
197 #endif
198 struct res_static rstatic[1];
199 };
200
201 typedef struct __res_state *res_state;
202
203 union res_sockaddr_union {
204 struct sockaddr_in sin;
205 #ifdef IN6ADDR_ANY_INIT
206 struct sockaddr_in6 sin6;
207 #endif
208 #ifdef ISC_ALIGN64
209 int64_t __align64; /* 64bit alignment */
210 #else
211 int32_t __align32; /* 32bit alignment */
212 #endif
213 char __space[128]; /* max size */
214 };
215
216 /*
217 * Resolver flags (used to be discrete per-module statics ints).
218 */
219 #define RES_F_VC 0x00000001 /* socket is TCP */
220 #define RES_F_CONN 0x00000002 /* socket is connected */
221 #define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors */
222 #define RES_F__UNUSED 0x00000008 /* (unused) */
223 #define RES_F_LASTMASK 0x000000F0 /* ordinal server of last res_nsend */
224 #define RES_F_LASTSHIFT 4 /* bit position of LASTMASK "flag" */
225 #define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT)
226
227 /* res_findzonecut2() options */
228 #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */
229 #define RES_IPV4ONLY 0x00000002 /* IPv4 only */
230 #define RES_IPV6ONLY 0x00000004 /* IPv6 only */
231
232 /*
233 * Resolver options (keep these in synch with res_debug.c, please)
234 */
235 #define RES_INIT 0x00000001 /* address initialized */
236 #define RES_DEBUG 0x00000002 /* print debug messages */
237 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/
238 #define RES_USEVC 0x00000008 /* use virtual circuit */
239 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */
240 #define RES_IGNTC 0x00000020 /* ignore trucation errors */
241 #define RES_RECURSE 0x00000040 /* recursion desired */
242 #define RES_DEFNAMES 0x00000080 /* use default domain name */
243 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
244 #define RES_DNSRCH 0x00000200 /* search up local domain tree */
245 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */
246 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */
247 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
248 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
249 #define RES_ROTATE 0x00004000 /* rotate ns list after each query */
250 #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */
251 #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */
252 #define RES_BLAST 0x00020000 /* blast all recursive servers */
253 #define RES_NOTLDQUERY 0x00100000 /* don't unqualified name as a tld */
254 #define RES_USE_DNSSEC 0x00200000 /* use DNSSEC using OK bit in OPT */
255 /* #define RES_DEBUG2 0x00400000 */ /* nslookup internal */
256 /* KAME extensions: use higher bit to avoid conflict with ISC use */
257 #define RES_USE_DNAME 0x10000000 /* use DNAME */
258 #define RES_USE_EDNS0 0x40000000 /* use EDNS0 if configured */
259 #define RES_NO_NIBBLE2 0x80000000 /* disable alternate nibble lookup */
260
261 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | \
262 RES_DNSRCH | RES_NO_NIBBLE2)
263
264 /*
265 * Resolver "pfcode" values. Used by dig.
266 */
267 #define RES_PRF_STATS 0x00000001
268 #define RES_PRF_UPDATE 0x00000002
269 #define RES_PRF_CLASS 0x00000004
270 #define RES_PRF_CMD 0x00000008
271 #define RES_PRF_QUES 0x00000010
272 #define RES_PRF_ANS 0x00000020
273 #define RES_PRF_AUTH 0x00000040
274 #define RES_PRF_ADD 0x00000080
275 #define RES_PRF_HEAD1 0x00000100
276 #define RES_PRF_HEAD2 0x00000200
277 #define RES_PRF_TTLID 0x00000400
278 #define RES_PRF_HEADX 0x00000800
279 #define RES_PRF_QUERY 0x00001000
280 #define RES_PRF_REPLY 0x00002000
281 #define RES_PRF_INIT 0x00004000
282 #define RES_PRF_TRUNC 0x00008000
283 /* 0x00010000 */
284
285 /* Things involving an internal (static) resolver context. */
286 __BEGIN_DECLS
287 extern struct __res_state *__res_get_state(void);
288 extern void __res_put_state(struct __res_state *);
289
290 #ifndef ANDROID_CHANGES
291 /*
292 * Source and Binary compatibility; _res will not work properly
293 * with multi-threaded programs.
294 */
295 extern struct __res_state *__res_state(void);
296 #define _res (*__res_state())
297 #endif
298
299 __END_DECLS
300
301 #ifndef __BIND_NOSTATIC
302 #define fp_nquery __fp_nquery
303 #define fp_query __fp_query
304 #define hostalias __hostalias
305 #define p_query __p_query
306 #define res_close __res_close
307 #define res_opt __res_opt
308 #define res_isourserver __res_isourserver
309 #define res_querydomain __res_querydomain
310 #define res_send __res_send
311 #define res_sendsigned __res_sendsigned
312
313 #ifdef BIND_RES_POSIX3
314 #define dn_expand __dn_expand
315 #define res_init __res_init
316 #define res_query __res_query
317 #define res_search __res_search
318 #define res_mkquery __res_mkquery
319 #endif
320
321 __BEGIN_DECLS
322 void fp_nquery(const u_char *, int, FILE *);
323 void fp_query(const u_char *, FILE *);
324 const char * hostalias(const char *);
325 void p_query(const u_char *);
326 void res_close(void);
327 int res_init(void);
328 int res_opt(int, u_char *, int, int);
329 int res_isourserver(const struct sockaddr_in *);
330 int res_mkquery(int, const char *, int, int, const u_char *, int, const u_char *, u_char *, int);
331 int res_query(const char *, int, int, u_char *, int);
332 int res_querydomain(const char *, const char *, int, int, u_char *, int);
333 int res_search(const char *, int, int, u_char *, int);
334 int res_send(const u_char *, int, u_char *, int);
335 int res_sendsigned(const u_char *, int, ns_tsig_key *, u_char *, int);
336 __END_DECLS
337 #endif
338
339 #if !defined(SHARED_LIBBIND) || defined(LIB)
340 /*
341 * If libbind is a shared object (well, DLL anyway)
342 * these externs break the linker when resolv.h is
343 * included by a lib client (like named)
344 * Make them go away if a client is including this
345 *
346 */
347 extern const struct res_sym __p_key_syms[];
348 extern const struct res_sym __p_cert_syms[];
349 extern const struct res_sym __p_class_syms[];
350 extern const struct res_sym __p_type_syms[];
351 extern const struct res_sym __p_rcode_syms[];
352 #endif /* SHARED_LIBBIND */
353
354 #ifndef ADNROID_CHANGES
355 #define b64_ntop __b64_ntop
356 #define b64_pton __b64_pton
357 #endif
358
359 #define dn_comp __dn_comp
360 #define dn_count_labels __dn_count_labels
361 #define dn_skipname __dn_skipname
362 #define fp_resstat __fp_resstat
363 #define loc_aton __loc_aton
364 #define loc_ntoa __loc_ntoa
365 #define p_cdname __p_cdname
366 #define p_cdnname __p_cdnname
367 #define p_class __p_class
368 #define p_fqname __p_fqname
369 #define p_fqnname __p_fqnname
370 #define p_option __p_option
371 #define p_secstodate __p_secstodate
372 #define p_section __p_section
373 #define p_time __p_time
374 #define p_type __p_type
375 #define p_rcode __p_rcode
376 #define p_sockun __p_sockun
377 #define putlong __putlong
378 #define putshort __putshort
379 #define res_dnok __res_dnok
380 #define res_findzonecut __res_findzonecut
381 #define res_findzonecut2 __res_findzonecut2
382 #define res_hnok __res_hnok
383 #define res_hostalias __res_hostalias
384 #define res_mailok __res_mailok
385 #define res_nameinquery __res_nameinquery
386 #define res_nclose __res_nclose
387 #define res_ninit __res_ninit
388 #define res_nmkquery __res_nmkquery
389 #define res_pquery __res_pquery
390 #define res_nquery __res_nquery
391 #define res_nquerydomain __res_nquerydomain
392 #define res_nsearch __res_nsearch
393 #define res_nsend __res_nsend
394 #define res_nsendsigned __res_nsendsigned
395 #define res_nisourserver __res_nisourserver
396 #define res_ownok __res_ownok
397 #define res_queriesmatch __res_queriesmatch
398 #define res_randomid __res_randomid
399 #define sym_ntop __sym_ntop
400 #define sym_ntos __sym_ntos
401 #define sym_ston __sym_ston
402 #define res_nopt __res_nopt
403 #define res_ndestroy __res_ndestroy
404 #define res_nametoclass __res_nametoclass
405 #define res_nametotype __res_nametotype
406 #define res_setservers __res_setservers
407 #define res_getservers __res_getservers
408 #define res_buildprotolist __res_buildprotolist
409 #define res_destroyprotolist __res_destroyprotolist
410 #define res_destroyservicelist __res_destroyservicelist
411 #define res_get_nibblesuffix __res_get_nibblesuffix
412 #define res_get_nibblesuffix2 __res_get_nibblesuffix2
413 #define res_ourserver_p __res_ourserver_p
414 #define res_protocolname __res_protocolname
415 #define res_protocolnumber __res_protocolnumber
416 #define res_send_setqhook __res_send_setqhook
417 #define res_send_setrhook __res_send_setrhook
418 #define res_servicename __res_servicename
419 #define res_servicenumber __res_servicenumber
420 __BEGIN_DECLS
421 int res_hnok(const char *);
422 int res_ownok(const char *);
423 int res_mailok(const char *);
424 int res_dnok(const char *);
425 int sym_ston(const struct res_sym *, const char *, int *);
426 const char * sym_ntos(const struct res_sym *, int, int *);
427 const char * sym_ntop(const struct res_sym *, int, int *);
428 #ifndef ANDROID_CHANGES
429 int b64_ntop(u_char const *, size_t, char *, size_t);
430 int b64_pton(char const *, u_char *, size_t);
431 #endif
432 int loc_aton(const char *, u_char *);
433 const char * loc_ntoa(const u_char *, char *);
434 int dn_skipname(const u_char *, const u_char *);
435 void putlong(uint32_t, u_char *);
436 void putshort(uint16_t, u_char *);
437 #ifndef __ultrix__
438 uint16_t _getshort(const u_char *);
439 uint32_t _getlong(const u_char *);
440 #endif
441 const char * p_class(int);
442 const char * p_time(uint32_t);
443 const char * p_type(int);
444 const char * p_rcode(int);
445 const char * p_sockun(union res_sockaddr_union, char *, size_t);
446 const u_char * p_cdnname(const u_char *, const u_char *, int, FILE *);
447 const u_char * p_cdname(const u_char *, const u_char *, FILE *);
448 const u_char * p_fqnname(const u_char *, const u_char *,
449 int, char *, int);
450 const u_char * p_fqname(const u_char *, const u_char *, FILE *);
451 const char * p_option(u_long);
452 char * p_secstodate(u_long);
453 int dn_count_labels(const char *);
454 int dn_comp(const char *, u_char *, int, u_char **, u_char **);
455 int dn_expand(const u_char *, const u_char *, const u_char *,
456 char *, int);
457 u_int res_randomid(void);
458 int res_nameinquery(const char *, int, int, const u_char *,
459 const u_char *);
460 int res_queriesmatch(const u_char *, const u_char *,
461 const u_char *, const u_char *);
462 const char * p_section(int, int);
463 /* Things involving a resolver context. */
464 int res_ninit(res_state);
465 int res_nisourserver(const res_state, const struct sockaddr_in *);
466 void fp_resstat(const res_state, FILE *);
467 void res_pquery(const res_state, const u_char *, int, FILE *);
468 const char * res_hostalias(const res_state, const char *, char *, size_t);
469 int res_nquery(res_state, const char *, int, int, u_char *, int);
470 int res_nsearch(res_state, const char *, int, int, u_char *, int);
471 int res_nquerydomain(res_state, const char *, const char *,
472 int, int, u_char *, int);
473 int res_nmkquery(res_state, int, const char *, int, int,
474 const u_char *, int, const u_char *,
475 u_char *, int);
476 int res_nsend(res_state, const u_char *, int, u_char *, int);
477 int res_nsendsigned(res_state, const u_char *, int,
478 ns_tsig_key *, u_char *, int);
479 int res_findzonecut(res_state, const char *, ns_class, int,
480 char *, size_t, struct in_addr *, int);
481 int res_findzonecut2(res_state, const char *, ns_class, int,
482 char *, size_t,
483 union res_sockaddr_union *, int);
484 void res_nclose(res_state);
485 int res_nopt(res_state, int, u_char *, int, int);
486 void res_send_setqhook(res_send_qhook);
487 void res_send_setrhook(res_send_rhook);
488 int __res_vinit(res_state, int);
489 void res_destroyservicelist(void);
490 const char * res_servicename(uint16_t, const char *);
491 const char * res_protocolname(int);
492 void res_destroyprotolist(void);
493 void res_buildprotolist(void);
494 const char * res_get_nibblesuffix(res_state);
495 const char * res_get_nibblesuffix2(res_state);
496 void res_ndestroy(res_state);
497 uint16_t res_nametoclass(const char *, int *);
498 uint16_t res_nametotype(const char *, int *);
499 void res_setservers(res_state,
500 const union res_sockaddr_union *, int);
501 int res_getservers(res_state,
502 union res_sockaddr_union *, int);
503
504 int res_get_dns_changed();
505 u_int res_randomid(void);
506
507 __END_DECLS
508
509 #endif /* !_RESOLV_PRIVATE_H_ */

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