xref: /freebsd/include/arpa/nameser.h (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  * 	This product includes software developed by the University of
16  * 	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 /*
35  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
36  * Copyright (c) 1996-1999 by Internet Software Consortium.
37  *
38  * Permission to use, copy, modify, and distribute this software for any
39  * purpose with or without fee is hereby granted, provided that the above
40  * copyright notice and this permission notice appear in all copies.
41  *
42  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
43  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
44  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
45  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
46  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
47  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
48  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
49  */
50 
51 /*
52  *	$Id: nameser.h,v 1.7.18.1 2005/04/27 05:00:50 sra Exp $
53  * $FreeBSD$
54  */
55 
56 #ifndef _ARPA_NAMESER_H_
57 #define _ARPA_NAMESER_H_
58 
59 /*! \file */
60 
61 #define BIND_4_COMPAT
62 
63 #include <sys/param.h>
64 #include <sys/types.h>
65 #include <sys/cdefs.h>
66 
67 /*%
68  * Revision information.  This is the release date in YYYYMMDD format.
69  * It can change every day so the right thing to do with it is use it
70  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
71  * compare for equality; rather, use it to determine whether your libbind.a
72  * contains a new enough lib/nameser/ to support the feature you need.
73  */
74 
75 #define __NAMESER	19991006	/*%< New interface version stamp. */
76 /*
77  * Define constants based on RFC0883, RFC1034, RFC 1035
78  */
79 #define NS_PACKETSZ	512	/*%< default UDP packet size */
80 #define NS_MAXDNAME	1025	/*%< maximum domain name */
81 #define NS_MAXMSG	65535	/*%< maximum message size */
82 #define NS_MAXCDNAME	255	/*%< maximum compressed domain name */
83 #define NS_MAXLABEL	63	/*%< maximum length of domain label */
84 #define NS_HFIXEDSZ	12	/*%< #/bytes of fixed data in header */
85 #define NS_QFIXEDSZ	4	/*%< #/bytes of fixed data in query */
86 #define NS_RRFIXEDSZ	10	/*%< #/bytes of fixed data in r record */
87 #define NS_INT32SZ	4	/*%< #/bytes of data in a u_int32_t */
88 #define NS_INT16SZ	2	/*%< #/bytes of data in a u_int16_t */
89 #define NS_INT8SZ	1	/*%< #/bytes of data in a u_int8_t */
90 #define NS_INADDRSZ	4	/*%< IPv4 T_A */
91 #define NS_IN6ADDRSZ	16	/*%< IPv6 T_AAAA */
92 #define NS_CMPRSFLGS	0xc0	/*%< Flag bits indicating name compression. */
93 #define NS_DEFAULTPORT	53	/*%< For both TCP and UDP. */
94 /*
95  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
96  * in synch with it.
97  */
98 typedef enum __ns_sect {
99 	ns_s_qd = 0,		/*%< Query: Question. */
100 	ns_s_zn = 0,		/*%< Update: Zone. */
101 	ns_s_an = 1,		/*%< Query: Answer. */
102 	ns_s_pr = 1,		/*%< Update: Prerequisites. */
103 	ns_s_ns = 2,		/*%< Query: Name servers. */
104 	ns_s_ud = 2,		/*%< Update: Update. */
105 	ns_s_ar = 3,		/*%< Query|Update: Additional records. */
106 	ns_s_max = 4
107 } ns_sect;
108 
109 /*%
110  * This is a message handle.  It is caller allocated and has no dynamic data.
111  * This structure is intended to be opaque to all but ns_parse.c, thus the
112  * leading _'s on the member names.  Use the accessor functions, not the _'s.
113  */
114 typedef struct __ns_msg {
115 	const u_char	*_msg, *_eom;
116 	u_int16_t	_id, _flags, _counts[ns_s_max];
117 	const u_char	*_sections[ns_s_max];
118 	ns_sect		_sect;
119 	int		_rrnum;
120 	const u_char	*_msg_ptr;
121 } ns_msg;
122 
123 /* Private data structure - do not use from outside library. */
124 struct _ns_flagdata {  int mask, shift;  };
125 extern struct _ns_flagdata _ns_flagdata[];
126 
127 /* Accessor macros - this is part of the public interface. */
128 
129 #define ns_msg_id(handle) ((handle)._id + 0)
130 #define ns_msg_base(handle) ((handle)._msg + 0)
131 #define ns_msg_end(handle) ((handle)._eom + 0)
132 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
133 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
134 
135 /*%
136  * This is a parsed record.  It is caller allocated and has no dynamic data.
137  */
138 typedef	struct __ns_rr {
139 	char		name[NS_MAXDNAME];
140 	u_int16_t	type;
141 	u_int16_t	rr_class;
142 	u_int32_t	ttl;
143 	u_int16_t	rdlength;
144 	const u_char *	rdata;
145 } ns_rr;
146 
147 /* Accessor macros - this is part of the public interface. */
148 #define ns_rr_name(rr)	(((rr).name[0] != '\0') ? (rr).name : ".")
149 #define ns_rr_type(rr)	((ns_type)((rr).type + 0))
150 #define ns_rr_class(rr)	((ns_class)((rr).rr_class + 0))
151 #define ns_rr_ttl(rr)	((rr).ttl + 0)
152 #define ns_rr_rdlen(rr)	((rr).rdlength + 0)
153 #define ns_rr_rdata(rr)	((rr).rdata + 0)
154 
155 /*%
156  * These don't have to be in the same order as in the packet flags word,
157  * and they can even overlap in some cases, but they will need to be kept
158  * in synch with ns_parse.c:ns_flagdata[].
159  */
160 typedef enum __ns_flag {
161 	ns_f_qr,		/*%< Question/Response. */
162 	ns_f_opcode,		/*%< Operation code. */
163 	ns_f_aa,		/*%< Authoritative Answer. */
164 	ns_f_tc,		/*%< Truncation occurred. */
165 	ns_f_rd,		/*%< Recursion Desired. */
166 	ns_f_ra,		/*%< Recursion Available. */
167 	ns_f_z,			/*%< MBZ. */
168 	ns_f_ad,		/*%< Authentic Data (DNSSEC). */
169 	ns_f_cd,		/*%< Checking Disabled (DNSSEC). */
170 	ns_f_rcode,		/*%< Response code. */
171 	ns_f_max
172 } ns_flag;
173 
174 /*%
175  * Currently defined opcodes.
176  */
177 typedef enum __ns_opcode {
178 	ns_o_query = 0,		/*%< Standard query. */
179 	ns_o_iquery = 1,	/*%< Inverse query (deprecated/unsupported). */
180 	ns_o_status = 2,	/*%< Name server status query (unsupported). */
181 				/* Opcode 3 is undefined/reserved. */
182 	ns_o_notify = 4,	/*%< Zone change notification. */
183 	ns_o_update = 5,	/*%< Zone update message. */
184 	ns_o_max = 6
185 } ns_opcode;
186 
187 /*%
188  * Currently defined response codes.
189  */
190 typedef	enum __ns_rcode {
191 	ns_r_noerror = 0,	/*%< No error occurred. */
192 	ns_r_formerr = 1,	/*%< Format error. */
193 	ns_r_servfail = 2,	/*%< Server failure. */
194 	ns_r_nxdomain = 3,	/*%< Name error. */
195 	ns_r_notimpl = 4,	/*%< Unimplemented. */
196 	ns_r_refused = 5,	/*%< Operation refused. */
197 	/* these are for BIND_UPDATE */
198 	ns_r_yxdomain = 6,	/*%< Name exists */
199 	ns_r_yxrrset = 7,	/*%< RRset exists */
200 	ns_r_nxrrset = 8,	/*%< RRset does not exist */
201 	ns_r_notauth = 9,	/*%< Not authoritative for zone */
202 	ns_r_notzone = 10,	/*%< Zone of record different from zone section */
203 	ns_r_max = 11,
204 	/* The following are EDNS extended rcodes */
205 	ns_r_badvers = 16,
206 	/* The following are TSIG errors */
207 	ns_r_badsig = 16,
208 	ns_r_badkey = 17,
209 	ns_r_badtime = 18
210 } ns_rcode;
211 
212 /* BIND_UPDATE */
213 typedef enum __ns_update_operation {
214 	ns_uop_delete = 0,
215 	ns_uop_add = 1,
216 	ns_uop_max = 2
217 } ns_update_operation;
218 
219 /*%
220  * This structure is used for TSIG authenticated messages
221  */
222 struct ns_tsig_key {
223         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
224         unsigned char *data;
225         int len;
226 };
227 typedef struct ns_tsig_key ns_tsig_key;
228 
229 /*%
230  * This structure is used for TSIG authenticated TCP messages
231  */
232 struct ns_tcp_tsig_state {
233 	int counter;
234 	struct dst_key *key;
235 	void *ctx;
236 	unsigned char sig[NS_PACKETSZ];
237 	int siglen;
238 };
239 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
240 
241 #define NS_TSIG_FUDGE 300
242 #define NS_TSIG_TCP_COUNT 100
243 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
244 
245 #define NS_TSIG_ERROR_NO_TSIG -10
246 #define NS_TSIG_ERROR_NO_SPACE -11
247 #define NS_TSIG_ERROR_FORMERR -12
248 
249 /*%
250  * Currently defined type values for resources and queries.
251  */
252 typedef enum __ns_type {
253 	ns_t_invalid = 0,	/*%< Cookie. */
254 	ns_t_a = 1,		/*%< Host address. */
255 	ns_t_ns = 2,		/*%< Authoritative server. */
256 	ns_t_md = 3,		/*%< Mail destination. */
257 	ns_t_mf = 4,		/*%< Mail forwarder. */
258 	ns_t_cname = 5,		/*%< Canonical name. */
259 	ns_t_soa = 6,		/*%< Start of authority zone. */
260 	ns_t_mb = 7,		/*%< Mailbox domain name. */
261 	ns_t_mg = 8,		/*%< Mail group member. */
262 	ns_t_mr = 9,		/*%< Mail rename name. */
263 	ns_t_null = 10,		/*%< Null resource record. */
264 	ns_t_wks = 11,		/*%< Well known service. */
265 	ns_t_ptr = 12,		/*%< Domain name pointer. */
266 	ns_t_hinfo = 13,	/*%< Host information. */
267 	ns_t_minfo = 14,	/*%< Mailbox information. */
268 	ns_t_mx = 15,		/*%< Mail routing information. */
269 	ns_t_txt = 16,		/*%< Text strings. */
270 	ns_t_rp = 17,		/*%< Responsible person. */
271 	ns_t_afsdb = 18,	/*%< AFS cell database. */
272 	ns_t_x25 = 19,		/*%< X_25 calling address. */
273 	ns_t_isdn = 20,		/*%< ISDN calling address. */
274 	ns_t_rt = 21,		/*%< Router. */
275 	ns_t_nsap = 22,		/*%< NSAP address. */
276 	ns_t_nsap_ptr = 23,	/*%< Reverse NSAP lookup (deprecated). */
277 	ns_t_sig = 24,		/*%< Security signature. */
278 	ns_t_key = 25,		/*%< Security key. */
279 	ns_t_px = 26,		/*%< X.400 mail mapping. */
280 	ns_t_gpos = 27,		/*%< Geographical position (withdrawn). */
281 	ns_t_aaaa = 28,		/*%< Ip6 Address. */
282 	ns_t_loc = 29,		/*%< Location Information. */
283 	ns_t_nxt = 30,		/*%< Next domain (security). */
284 	ns_t_eid = 31,		/*%< Endpoint identifier. */
285 	ns_t_nimloc = 32,	/*%< Nimrod Locator. */
286 	ns_t_srv = 33,		/*%< Server Selection. */
287 	ns_t_atma = 34,		/*%< ATM Address */
288 	ns_t_naptr = 35,	/*%< Naming Authority PoinTeR */
289 	ns_t_kx = 36,		/*%< Key Exchange */
290 	ns_t_cert = 37,		/*%< Certification record */
291 	ns_t_a6 = 38,		/*%< IPv6 address (deprecates AAAA) */
292 	ns_t_dname = 39,	/*%< Non-terminal DNAME (for IPv6) */
293 	ns_t_sink = 40,		/*%< Kitchen sink (experimentatl) */
294 	ns_t_opt = 41,		/*%< EDNS0 option (meta-RR) */
295 	ns_t_apl = 42,		/*%< Address prefix list (RFC3123) */
296 	ns_t_tkey = 249,	/*%< Transaction key */
297 	ns_t_tsig = 250,	/*%< Transaction signature. */
298 	ns_t_ixfr = 251,	/*%< Incremental zone transfer. */
299 	ns_t_axfr = 252,	/*%< Transfer zone of authority. */
300 	ns_t_mailb = 253,	/*%< Transfer mailbox records. */
301 	ns_t_maila = 254,	/*%< Transfer mail agent records. */
302 	ns_t_any = 255,		/*%< Wildcard match. */
303 	ns_t_zxfr = 256,	/*%< BIND-specific, nonstandard. */
304 	ns_t_max = 65536
305 } ns_type;
306 
307 /* Exclusively a QTYPE? (not also an RTYPE) */
308 #define	ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
309 		      (t) == ns_t_mailb || (t) == ns_t_maila)
310 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
311 #define	ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
312 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
313 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
314 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
315 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
316 		       (t) == ns_t_zxfr)
317 
318 /*%
319  * Values for class field
320  */
321 typedef enum __ns_class {
322 	ns_c_invalid = 0,	/*%< Cookie. */
323 	ns_c_in = 1,		/*%< Internet. */
324 	ns_c_2 = 2,		/*%< unallocated/unsupported. */
325 	ns_c_chaos = 3,		/*%< MIT Chaos-net. */
326 	ns_c_hs = 4,		/*%< MIT Hesiod. */
327 	/* Query class values which do not appear in resource records */
328 	ns_c_none = 254,	/*%< for prereq. sections in update requests */
329 	ns_c_any = 255,		/*%< Wildcard match. */
330 	ns_c_max = 65536
331 } ns_class;
332 
333 /* DNSSEC constants. */
334 
335 typedef enum __ns_key_types {
336 	ns_kt_rsa = 1,		/*%< key type RSA/MD5 */
337 	ns_kt_dh  = 2,		/*%< Diffie Hellman */
338 	ns_kt_dsa = 3,		/*%< Digital Signature Standard (MANDATORY) */
339 	ns_kt_private = 254	/*%< Private key type starts with OID */
340 } ns_key_types;
341 
342 typedef enum __ns_cert_types {
343 	cert_t_pkix = 1,	/*%< PKIX (X.509v3) */
344 	cert_t_spki = 2,	/*%< SPKI */
345 	cert_t_pgp  = 3,	/*%< PGP */
346 	cert_t_url  = 253,	/*%< URL private type */
347 	cert_t_oid  = 254	/*%< OID private type */
348 } ns_cert_types;
349 
350 /* Flags field of the KEY RR rdata. */
351 #define	NS_KEY_TYPEMASK		0xC000	/*%< Mask for "type" bits */
352 #define	NS_KEY_TYPE_AUTH_CONF	0x0000	/*%< Key usable for both */
353 #define	NS_KEY_TYPE_CONF_ONLY	0x8000	/*%< Key usable for confidentiality */
354 #define	NS_KEY_TYPE_AUTH_ONLY	0x4000	/*%< Key usable for authentication */
355 #define	NS_KEY_TYPE_NO_KEY	0xC000	/*%< No key usable for either; no key */
356 /* The type bits can also be interpreted independently, as single bits: */
357 #define	NS_KEY_NO_AUTH		0x8000	/*%< Key unusable for authentication */
358 #define	NS_KEY_NO_CONF		0x4000	/*%< Key unusable for confidentiality */
359 #define	NS_KEY_RESERVED2	0x2000	/* Security is *mandatory* if bit=0 */
360 #define	NS_KEY_EXTENDED_FLAGS	0x1000	/*%< reserved - must be zero */
361 #define	NS_KEY_RESERVED4	0x0800  /*%< reserved - must be zero */
362 #define	NS_KEY_RESERVED5	0x0400  /*%< reserved - must be zero */
363 #define	NS_KEY_NAME_TYPE	0x0300	/*%< these bits determine the type */
364 #define	NS_KEY_NAME_USER	0x0000	/*%< key is assoc. with user */
365 #define	NS_KEY_NAME_ENTITY	0x0200	/*%< key is assoc. with entity eg host */
366 #define	NS_KEY_NAME_ZONE	0x0100	/*%< key is zone key */
367 #define	NS_KEY_NAME_RESERVED	0x0300	/*%< reserved meaning */
368 #define	NS_KEY_RESERVED8	0x0080  /*%< reserved - must be zero */
369 #define	NS_KEY_RESERVED9	0x0040  /*%< reserved - must be zero */
370 #define	NS_KEY_RESERVED10	0x0020  /*%< reserved - must be zero */
371 #define	NS_KEY_RESERVED11	0x0010  /*%< reserved - must be zero */
372 #define	NS_KEY_SIGNATORYMASK	0x000F	/*%< key can sign RR's of same name */
373 #define	NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
374 				  NS_KEY_RESERVED4 | \
375 				  NS_KEY_RESERVED5 | \
376 				  NS_KEY_RESERVED8 | \
377 				  NS_KEY_RESERVED9 | \
378 				  NS_KEY_RESERVED10 | \
379 				  NS_KEY_RESERVED11 )
380 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /*%< no bits defined here */
381 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
382 #define	NS_ALG_MD5RSA		1	/*%< MD5 with RSA */
383 #define	NS_ALG_DH               2	/*%< Diffie Hellman KEY */
384 #define	NS_ALG_DSA              3	/*%< DSA KEY */
385 #define	NS_ALG_DSS              NS_ALG_DSA
386 #define	NS_ALG_EXPIRE_ONLY	253	/*%< No alg, no security */
387 #define	NS_ALG_PRIVATE_OID	254	/*%< Key begins with OID giving alg */
388 /* Protocol values  */
389 /* value 0 is reserved */
390 #define NS_KEY_PROT_TLS         1
391 #define NS_KEY_PROT_EMAIL       2
392 #define NS_KEY_PROT_DNSSEC      3
393 #define NS_KEY_PROT_IPSEC       4
394 #define NS_KEY_PROT_ANY		255
395 
396 /* Signatures */
397 #define	NS_MD5RSA_MIN_BITS	 512	/*%< Size of a mod or exp in bits */
398 #define	NS_MD5RSA_MAX_BITS	4096
399 	/* Total of binary mod and exp */
400 #define	NS_MD5RSA_MAX_BYTES	((NS_MD5RSA_MAX_BITS+7/8)*2+3)
401 	/* Max length of text sig block */
402 #define	NS_MD5RSA_MAX_BASE64	(((NS_MD5RSA_MAX_BYTES+2)/3)*4)
403 #define NS_MD5RSA_MIN_SIZE	((NS_MD5RSA_MIN_BITS+7)/8)
404 #define NS_MD5RSA_MAX_SIZE	((NS_MD5RSA_MAX_BITS+7)/8)
405 
406 #define NS_DSA_SIG_SIZE         41
407 #define NS_DSA_MIN_SIZE         213
408 #define NS_DSA_MAX_BYTES        405
409 
410 /* Offsets into SIG record rdata to find various values */
411 #define	NS_SIG_TYPE	0	/*%< Type flags */
412 #define	NS_SIG_ALG	2	/*%< Algorithm */
413 #define	NS_SIG_LABELS	3	/*%< How many labels in name */
414 #define	NS_SIG_OTTL	4	/*%< Original TTL */
415 #define	NS_SIG_EXPIR	8	/*%< Expiration time */
416 #define	NS_SIG_SIGNED	12	/*%< Signature time */
417 #define	NS_SIG_FOOT	16	/*%< Key footprint */
418 #define	NS_SIG_SIGNER	18	/*%< Domain name of who signed it */
419 /* How RR types are represented as bit-flags in NXT records */
420 #define	NS_NXT_BITS 8
421 #define	NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
422 #define	NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
423 #define	NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
424 #define NS_NXT_MAX 127
425 
426 /*%
427  * EDNS0 extended flags, host order.
428  */
429 #define NS_OPT_DNSSEC_OK	0x8000U
430 
431 /*%
432  * Inline versions of get/put short/long.  Pointer is advanced.
433  */
434 #define NS_GET16(s, cp) do { \
435 	register const u_char *t_cp = (const u_char *)(cp); \
436 	(s) = ((u_int16_t)t_cp[0] << 8) \
437 	    | ((u_int16_t)t_cp[1]) \
438 	    ; \
439 	(cp) += NS_INT16SZ; \
440 } while (0)
441 
442 #define NS_GET32(l, cp) do { \
443 	register const u_char *t_cp = (const u_char *)(cp); \
444 	(l) = ((u_int32_t)t_cp[0] << 24) \
445 	    | ((u_int32_t)t_cp[1] << 16) \
446 	    | ((u_int32_t)t_cp[2] << 8) \
447 	    | ((u_int32_t)t_cp[3]) \
448 	    ; \
449 	(cp) += NS_INT32SZ; \
450 } while (0)
451 
452 #define NS_PUT16(s, cp) do { \
453 	register u_int16_t t_s = (u_int16_t)(s); \
454 	register u_char *t_cp = (u_char *)(cp); \
455 	*t_cp++ = t_s >> 8; \
456 	*t_cp   = t_s; \
457 	(cp) += NS_INT16SZ; \
458 } while (0)
459 
460 #define NS_PUT32(l, cp) do { \
461 	register u_int32_t t_l = (u_int32_t)(l); \
462 	register u_char *t_cp = (u_char *)(cp); \
463 	*t_cp++ = t_l >> 24; \
464 	*t_cp++ = t_l >> 16; \
465 	*t_cp++ = t_l >> 8; \
466 	*t_cp   = t_l; \
467 	(cp) += NS_INT32SZ; \
468 } while (0)
469 
470 /*%
471  * ANSI C identifier hiding for bind's lib/nameser.
472  */
473 #define	ns_msg_getflag		__ns_msg_getflag
474 #define ns_get16		__ns_get16
475 #define ns_get32		__ns_get32
476 #define ns_put16		__ns_put16
477 #define ns_put32		__ns_put32
478 #define ns_initparse		__ns_initparse
479 #define ns_skiprr		__ns_skiprr
480 #define ns_parserr		__ns_parserr
481 #define	ns_sprintrr		__ns_sprintrr
482 #define	ns_sprintrrf		__ns_sprintrrf
483 #define	ns_format_ttl		__ns_format_ttl
484 #define	ns_parse_ttl		__ns_parse_ttl
485 #if 0
486 #define ns_datetosecs		__ns_datetosecs
487 #endif
488 #define	ns_name_ntol		__ns_name_ntol
489 #define	ns_name_ntop		__ns_name_ntop
490 #define	ns_name_pton		__ns_name_pton
491 #define	ns_name_unpack		__ns_name_unpack
492 #define	ns_name_pack		__ns_name_pack
493 #define	ns_name_compress	__ns_name_compress
494 #define	ns_name_uncompress	__ns_name_uncompress
495 #define	ns_name_skip		__ns_name_skip
496 #define	ns_name_rollback	__ns_name_rollback
497 #if 0
498 #define	ns_sign			__ns_sign
499 #define	ns_sign2		__ns_sign2
500 #define	ns_sign_tcp		__ns_sign_tcp
501 #define	ns_sign_tcp2		__ns_sign_tcp2
502 #define	ns_sign_tcp_init	__ns_sign_tcp_init
503 #define ns_find_tsig		__ns_find_tsig
504 #define	ns_verify		__ns_verify
505 #define	ns_verify_tcp		__ns_verify_tcp
506 #define	ns_verify_tcp_init	__ns_verify_tcp_init
507 #endif
508 #define	ns_samedomain		__ns_samedomain
509 #if 0
510 #define	ns_subdomain		__ns_subdomain
511 #endif
512 #define	ns_makecanon		__ns_makecanon
513 #define	ns_samename		__ns_samename
514 
515 __BEGIN_DECLS
516 int		ns_msg_getflag(ns_msg, int);
517 u_int		ns_get16(const u_char *);
518 u_long		ns_get32(const u_char *);
519 void		ns_put16(u_int, u_char *);
520 void		ns_put32(u_long, u_char *);
521 int		ns_initparse(const u_char *, int, ns_msg *);
522 int		ns_skiprr(const u_char *, const u_char *, ns_sect, int);
523 int		ns_parserr(ns_msg *, ns_sect, int, ns_rr *);
524 int		ns_sprintrr(const ns_msg *, const ns_rr *,
525 			    const char *, const char *, char *, size_t);
526 int		ns_sprintrrf(const u_char *, size_t, const char *,
527 			     ns_class, ns_type, u_long, const u_char *,
528 			     size_t, const char *, const char *,
529 			     char *, size_t);
530 int		ns_format_ttl(u_long, char *, size_t);
531 int		ns_parse_ttl(const char *, u_long *);
532 #if 0
533 u_int32_t	ns_datetosecs(const char *cp, int *errp);
534 #endif
535 int		ns_name_ntol(const u_char *, u_char *, size_t);
536 int		ns_name_ntop(const u_char *, char *, size_t);
537 int		ns_name_pton(const char *, u_char *, size_t);
538 int		ns_name_unpack(const u_char *, const u_char *,
539 			       const u_char *, u_char *, size_t);
540 int		ns_name_pack(const u_char *, u_char *, int,
541 			     const u_char **, const u_char **);
542 int		ns_name_uncompress(const u_char *, const u_char *,
543 				   const u_char *, char *, size_t);
544 int		ns_name_compress(const char *, u_char *, size_t,
545 				 const u_char **, const u_char **);
546 int		ns_name_skip(const u_char **, const u_char *);
547 void		ns_name_rollback(const u_char *, const u_char **,
548 				 const u_char **);
549 #if 0
550 int		ns_sign(u_char *, int *, int, int, void *,
551 			const u_char *, int, u_char *, int *, time_t);
552 int		ns_sign2(u_char *, int *, int, int, void *,
553 			 const u_char *, int, u_char *, int *, time_t,
554 			 u_char **, u_char **);
555 int		ns_sign_tcp(u_char *, int *, int, int,
556 			    ns_tcp_tsig_state *, int);
557 int		ns_sign_tcp2(u_char *, int *, int, int,
558 			     ns_tcp_tsig_state *, int,
559 			     u_char **, u_char **);
560 int		ns_sign_tcp_init(void *, const u_char *, int,
561 				 ns_tcp_tsig_state *);
562 u_char		*ns_find_tsig(u_char *, u_char *);
563 int		ns_verify(u_char *, int *, void *,
564 			  const u_char *, int, u_char *, int *,
565 			  time_t *, int);
566 int		ns_verify_tcp(u_char *, int *, ns_tcp_tsig_state *, int);
567 int		ns_verify_tcp_init(void *, const u_char *, int,
568 				   ns_tcp_tsig_state *);
569 #endif
570 int		ns_samedomain(const char *, const char *);
571 #if 0
572 int		ns_subdomain(const char *, const char *);
573 #endif
574 int		ns_makecanon(const char *, char *, size_t);
575 int		ns_samename(const char *, const char *);
576 __END_DECLS
577 
578 #ifdef BIND_4_COMPAT
579 #include <arpa/nameser_compat.h>
580 #endif
581 
582 #endif /* !_ARPA_NAMESER_H_ */
583 /*! \file */
584