1/*
2 * Copyright (c) 1983, 1989, 1993
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 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
32 * Copyright (c) 1996-1999 by Internet Software Consortium.
33 *
34 * Permission to use, copy, modify, and distribute this software for any
35 * purpose with or without fee is hereby granted, provided that the above
36 * copyright notice and this permission notice appear in all copies.
37 *
38 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
39 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
40 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
41 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
42 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
43 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
44 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
45 * SOFTWARE.
46 */
47
48#ifndef _ARPA_NAMESER_H_
49#define _ARPA_NAMESER_H_
50
51#include <sys/param.h>
52#include <sys/types.h>
53#include <stdint.h>
54
55#ifdef _LIBC
56# define __NAMESER_DEPRECATED
57#else
58# define __NAMESER_DEPRECATED __attribute_deprecated__
59#endif
60
61/*
62 * Define constants based on RFC 883, RFC 1034, RFC 1035
63 */
64#define NS_PACKETSZ 512 /*%< default UDP packet size */
65#define NS_MAXDNAME 1025 /*%< maximum domain name */
66#define NS_MAXMSG 65535 /*%< maximum message size */
67#define NS_MAXCDNAME 255 /*%< maximum compressed domain name */
68#define NS_MAXLABEL 63 /*%< maximum length of domain label */
69#define NS_HFIXEDSZ 12 /*%< #/bytes of fixed data in header */
70#define NS_QFIXEDSZ 4 /*%< #/bytes of fixed data in query */
71#define NS_RRFIXEDSZ 10 /*%< #/bytes of fixed data in r record */
72#define NS_INT32SZ 4 /*%< #/bytes of data in a uint32_t */
73#define NS_INT16SZ 2 /*%< #/bytes of data in a uint16_t */
74#define NS_INT8SZ 1 /*%< #/bytes of data in a uint8_t */
75#define NS_INADDRSZ 4 /*%< IPv4 T_A */
76#define NS_IN6ADDRSZ 16 /*%< IPv6 T_AAAA */
77#define NS_CMPRSFLGS 0xc0 /*%< Flag bits indicating name compression. */
78#define NS_DEFAULTPORT 53 /*%< For both TCP and UDP. */
79/*
80 * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
81 * in synch with it.
82 */
83typedef enum __ns_sect {
84 ns_s_qd = 0, /*%< Query: Question. */
85 ns_s_zn = 0, /*%< Update: Zone. */
86 ns_s_an = 1, /*%< Query: Answer. */
87 ns_s_pr = 1, /*%< Update: Prerequisites. */
88 ns_s_ns = 2, /*%< Query: Name servers. */
89 ns_s_ud = 2, /*%< Update: Update. */
90 ns_s_ar = 3, /*%< Query|Update: Additional records. */
91 ns_s_max = 4
92} ns_sect;
93
94/*%
95 * This is a message handle. It is caller allocated and has no dynamic data.
96 * This structure is intended to be opaque to all but ns_parse.c, thus the
97 * leading _'s on the member names. Use the accessor functions, not the _'s.
98 */
99typedef struct __ns_msg {
100 const unsigned char *_msg, *_eom;
101 uint16_t _id, _flags, _counts[ns_s_max];
102 const unsigned char *_sections[ns_s_max];
103 ns_sect _sect;
104 int _rrnum;
105 const unsigned char *_msg_ptr;
106} ns_msg;
107
108/* Private data structure - do not use from outside library. */
109struct _ns_flagdata { int mask, shift; };
110extern const struct _ns_flagdata _ns_flagdata[];
111
112/* Accessor macros - this is part of the public interface. */
113
114#define ns_msg_id(handle) ((handle)._id + 0)
115#define ns_msg_base(handle) ((handle)._msg + 0)
116#define ns_msg_end(handle) ((handle)._eom + 0)
117#define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
118#define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
119
120/*%
121 * This is a parsed record. It is caller allocated and has no dynamic data.
122 */
123typedef struct __ns_rr {
124 char name[NS_MAXDNAME];
125 uint16_t type;
126 uint16_t rr_class;
127 uint32_t ttl;
128 uint16_t rdlength;
129 const unsigned char * rdata;
130} ns_rr;
131
132/* Accessor macros - this is part of the public interface. */
133#define ns_rr_name(rr) (((rr).name[0] != '\0') ? (rr).name : ".")
134#define ns_rr_type(rr) ((ns_type)((rr).type + 0))
135#define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
136#define ns_rr_ttl(rr) ((rr).ttl + 0)
137#define ns_rr_rdlen(rr) ((rr).rdlength + 0)
138#define ns_rr_rdata(rr) ((rr).rdata + 0)
139
140/*%
141 * These don't have to be in the same order as in the packet flags word,
142 * and they can even overlap in some cases, but they will need to be kept
143 * in synch with ns_parse.c:ns_flagdata[].
144 */
145typedef enum __ns_flag {
146 ns_f_qr, /*%< Question/Response. */
147 ns_f_opcode, /*%< Operation code. */
148 ns_f_aa, /*%< Authoritative Answer. */
149 ns_f_tc, /*%< Truncation occurred. */
150 ns_f_rd, /*%< Recursion Desired. */
151 ns_f_ra, /*%< Recursion Available. */
152 ns_f_z, /*%< MBZ. */
153 ns_f_ad, /*%< Authentic Data (DNSSEC). */
154 ns_f_cd, /*%< Checking Disabled (DNSSEC). */
155 ns_f_rcode, /*%< Response code. */
156 ns_f_max
157} ns_flag;
158
159/*%
160 * Currently defined opcodes.
161 */
162typedef enum __ns_opcode {
163 ns_o_query = 0, /*%< Standard query. */
164 ns_o_iquery = 1, /*%< Inverse query (deprecated/unsupported). */
165 ns_o_status = 2, /*%< Name server status query (unsupported). */
166 /* Opcode 3 is undefined/reserved. */
167 ns_o_notify = 4, /*%< Zone change notification. */
168 ns_o_update = 5, /*%< Zone update message. */
169 ns_o_max = 6
170} ns_opcode;
171
172/*%
173 * Currently defined response codes.
174 */
175typedef enum __ns_rcode {
176 ns_r_noerror = 0, /*%< No error occurred. */
177 ns_r_formerr = 1, /*%< Format error. */
178 ns_r_servfail = 2, /*%< Server failure. */
179 ns_r_nxdomain = 3, /*%< Name error. */
180 ns_r_notimpl = 4, /*%< Unimplemented. */
181 ns_r_refused = 5, /*%< Operation refused. */
182 /* these are for BIND_UPDATE */
183 ns_r_yxdomain = 6, /*%< Name exists */
184 ns_r_yxrrset = 7, /*%< RRset exists */
185 ns_r_nxrrset = 8, /*%< RRset does not exist */
186 ns_r_notauth = 9, /*%< Not authoritative for zone */
187 ns_r_notzone = 10, /*%< Zone of record different from zone section */
188 ns_r_max = 11,
189 /* The following are EDNS extended rcodes */
190 ns_r_badvers = 16,
191 /* The following are TSIG errors */
192 ns_r_badsig = 16,
193 ns_r_badkey = 17,
194 ns_r_badtime = 18
195} ns_rcode;
196
197/* BIND_UPDATE */
198typedef enum __ns_update_operation {
199 ns_uop_delete = 0,
200 ns_uop_add = 1,
201 ns_uop_max = 2
202} ns_update_operation;
203
204/*%
205 * This structure is used for TSIG authenticated messages
206 */
207struct ns_tsig_key {
208 char name[NS_MAXDNAME], alg[NS_MAXDNAME];
209 unsigned char *data;
210 int len;
211};
212typedef struct ns_tsig_key ns_tsig_key;
213
214/*%
215 * This structure is used for TSIG authenticated TCP messages
216 */
217struct ns_tcp_tsig_state {
218 int counter;
219 struct dst_key *key;
220 void *ctx;
221 unsigned char sig[NS_PACKETSZ];
222 int siglen;
223};
224typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
225
226#define NS_TSIG_FUDGE 300
227#define NS_TSIG_TCP_COUNT 100
228#define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
229
230#define NS_TSIG_ERROR_NO_TSIG -10
231#define NS_TSIG_ERROR_NO_SPACE -11
232#define NS_TSIG_ERROR_FORMERR -12
233
234/*%
235 * Currently defined type values for resources and queries.
236 */
237typedef enum __ns_type
238 {
239 ns_t_invalid = 0,
240
241 ns_t_a = 1,
242 ns_t_ns = 2,
243 ns_t_md = 3,
244 ns_t_mf = 4,
245 ns_t_cname = 5,
246 ns_t_soa = 6,
247 ns_t_mb = 7,
248 ns_t_mg = 8,
249 ns_t_mr = 9,
250 ns_t_null = 10,
251 ns_t_wks = 11,
252 ns_t_ptr = 12,
253 ns_t_hinfo = 13,
254 ns_t_minfo = 14,
255 ns_t_mx = 15,
256 ns_t_txt = 16,
257 ns_t_rp = 17,
258 ns_t_afsdb = 18,
259 ns_t_x25 = 19,
260 ns_t_isdn = 20,
261 ns_t_rt = 21,
262 ns_t_nsap = 22,
263 ns_t_nsap_ptr = 23,
264 ns_t_sig = 24,
265 ns_t_key = 25,
266 ns_t_px = 26,
267 ns_t_gpos = 27,
268 ns_t_aaaa = 28,
269 ns_t_loc = 29,
270 ns_t_nxt = 30,
271 ns_t_eid = 31,
272 ns_t_nimloc = 32,
273 ns_t_srv = 33,
274 ns_t_atma = 34,
275 ns_t_naptr = 35,
276 ns_t_kx = 36,
277 ns_t_cert = 37,
278 ns_t_a6 = 38,
279 ns_t_dname = 39,
280 ns_t_sink = 40,
281 ns_t_opt = 41,
282 ns_t_apl = 42,
283 ns_t_ds = 43,
284 ns_t_sshfp = 44,
285 ns_t_ipseckey = 45,
286 ns_t_rrsig = 46,
287 ns_t_nsec = 47,
288 ns_t_dnskey = 48,
289 ns_t_dhcid = 49,
290 ns_t_nsec3 = 50,
291 ns_t_nsec3param = 51,
292 ns_t_tlsa = 52,
293 ns_t_smimea = 53,
294 ns_t_hip = 55,
295 ns_t_ninfo = 56,
296 ns_t_rkey = 57,
297 ns_t_talink = 58,
298 ns_t_cds = 59,
299 ns_t_cdnskey = 60,
300 ns_t_openpgpkey = 61,
301 ns_t_csync = 62,
302 ns_t_spf = 99,
303 ns_t_uinfo = 100,
304 ns_t_uid = 101,
305 ns_t_gid = 102,
306 ns_t_unspec = 103,
307 ns_t_nid = 104,
308 ns_t_l32 = 105,
309 ns_t_l64 = 106,
310 ns_t_lp = 107,
311 ns_t_eui48 = 108,
312 ns_t_eui64 = 109,
313 ns_t_tkey = 249,
314 ns_t_tsig = 250,
315 ns_t_ixfr = 251,
316 ns_t_axfr = 252,
317 ns_t_mailb = 253,
318 ns_t_maila = 254,
319 ns_t_any = 255,
320 ns_t_uri = 256,
321 ns_t_caa = 257,
322 ns_t_avc = 258,
323 ns_t_ta = 32768,
324 ns_t_dlv = 32769,
325
326 ns_t_max = 65536
327 } ns_type;
328
329/*%
330 * Values for class field
331 */
332typedef enum __ns_class {
333 ns_c_invalid = 0, /*%< Cookie. */
334 ns_c_in = 1, /*%< Internet. */
335 ns_c_2 = 2, /*%< unallocated/unsupported. */
336 ns_c_chaos = 3, /*%< MIT Chaos-net. */
337 ns_c_hs = 4, /*%< MIT Hesiod. */
338 /* Query class values which do not appear in resource records */
339 ns_c_none = 254, /*%< for prereq. sections in update requests */
340 ns_c_any = 255, /*%< Wildcard match. */
341 ns_c_max = 65536
342} ns_class;
343
344/* Certificate type values in CERT resource records. */
345typedef enum __ns_cert_types {
346 cert_t_pkix = 1, /*%< PKIX (X.509v3) */
347 cert_t_spki = 2, /*%< SPKI */
348 cert_t_pgp = 3, /*%< PGP */
349 cert_t_url = 253, /*%< URL private type */
350 cert_t_oid = 254 /*%< OID private type */
351} ns_cert_types;
352
353/*%
354 * EDNS0 extended flags and option codes, host order.
355 */
356#define NS_OPT_DNSSEC_OK 0x8000U
357#define NS_OPT_NSID 3
358
359/*%
360 * Inline versions of get/put short/long. Pointer is advanced.
361 */
362#define NS_GET16(s, cp) do { \
363 const unsigned char *t_cp = (const unsigned char *)(cp); \
364 (s) = ((uint16_t)t_cp[0] << 8) \
365 | ((uint16_t)t_cp[1]) \
366 ; \
367 (cp) += NS_INT16SZ; \
368} while (0)
369
370#define NS_GET32(l, cp) do { \
371 const unsigned char *t_cp = (const unsigned char *)(cp); \
372 (l) = ((uint32_t)t_cp[0] << 24) \
373 | ((uint32_t)t_cp[1] << 16) \
374 | ((uint32_t)t_cp[2] << 8) \
375 | ((uint32_t)t_cp[3]) \
376 ; \
377 (cp) += NS_INT32SZ; \
378} while (0)
379
380#define NS_PUT16(s, cp) do { \
381 uint16_t t_s = (uint16_t)(s); \
382 unsigned char *t_cp = (unsigned char *)(cp); \
383 *t_cp++ = t_s >> 8; \
384 *t_cp = t_s; \
385 (cp) += NS_INT16SZ; \
386} while (0)
387
388#define NS_PUT32(l, cp) do { \
389 uint32_t t_l = (uint32_t)(l); \
390 unsigned char *t_cp = (unsigned char *)(cp); \
391 *t_cp++ = t_l >> 24; \
392 *t_cp++ = t_l >> 16; \
393 *t_cp++ = t_l >> 8; \
394 *t_cp = t_l; \
395 (cp) += NS_INT32SZ; \
396} while (0)
397
398__BEGIN_DECLS
399int ns_msg_getflag (ns_msg, int) __THROW;
400unsigned int ns_get16 (const unsigned char *) __THROW;
401unsigned long ns_get32 (const unsigned char *) __THROW;
402void ns_put16 (unsigned int, unsigned char *) __THROW;
403void ns_put32 (unsigned long, unsigned char *) __THROW;
404int ns_initparse (const unsigned char *, int, ns_msg *) __THROW;
405int ns_skiprr (const unsigned char *, const unsigned char *,
406 ns_sect, int) __THROW;
407int ns_parserr (ns_msg *, ns_sect, int, ns_rr *) __THROW;
408int ns_sprintrr (const ns_msg *, const ns_rr *,
409 const char *, const char *, char *, size_t)
410 __THROW __NAMESER_DEPRECATED;
411int ns_sprintrrf (const unsigned char *, size_t, const char *,
412 ns_class, ns_type, unsigned long,
413 const unsigned char *, size_t, const char *,
414 const char *, char *, size_t)
415 __THROW __NAMESER_DEPRECATED;
416int ns_format_ttl (unsigned long, char *, size_t)
417 __THROW __NAMESER_DEPRECATED;
418int ns_parse_ttl (const char *, unsigned long *)
419 __THROW __NAMESER_DEPRECATED;
420uint32_t ns_datetosecs (const char *, int *)
421 __THROW __NAMESER_DEPRECATED;
422int ns_name_ntol (const unsigned char *, unsigned char *, size_t)
423 __THROW;
424int ns_name_ntop (const unsigned char *, char *, size_t) __THROW;
425int ns_name_pton (const char *, unsigned char *, size_t) __THROW;
426int ns_name_unpack (const unsigned char *, const unsigned char *,
427 const unsigned char *, unsigned char *, size_t)
428 __THROW;
429int ns_name_pack (const unsigned char *, unsigned char *, int,
430 const unsigned char **, const unsigned char **)
431 __THROW;
432int ns_name_uncompress (const unsigned char *,
433 const unsigned char *,
434 const unsigned char *,
435 char *, size_t) __THROW;
436int ns_name_compress (const char *, unsigned char *, size_t,
437 const unsigned char **,
438 const unsigned char **) __THROW;
439int ns_name_skip (const unsigned char **, const unsigned char *)
440 __THROW;
441void ns_name_rollback (const unsigned char *,
442 const unsigned char **,
443 const unsigned char **) __THROW;
444
445int ns_samedomain (const char *, const char *) __THROW
446 __NAMESER_DEPRECATED;
447int ns_subdomain (const char *, const char *) __THROW
448 __NAMESER_DEPRECATED;
449int ns_makecanon (const char *, char *, size_t) __THROW
450 __NAMESER_DEPRECATED;
451int ns_samename (const char *, const char *) __THROW
452 __NAMESER_DEPRECATED;
453__END_DECLS
454
455#include <arpa/nameser_compat.h>
456
457#endif /* !_ARPA_NAMESER_H_ */
458/*! \file */
459