source: branches/libc-0.6/src/emx/include/arpa/nameser.h

Last change on this file was 3809, checked in by bird, 11 years ago

0.6: s/const/const/g - just use the (now) standard 'const' everywhere in emx and kLIBC code. Avoid changing external code too much. fixes #279.
  • Property cvs2svn:cvs-rev set to 1.5
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 14.5 KB
Line 
1/* Modified for emx by hv 1994,1996
2 * Modified for gcc/os2 by bird 2003
3 *
4 * Copyright (c) 1983, 1989 Regents of the University of California.
5 * 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. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * from: @(#)nameser.h 5.25 (Berkeley) 4/3/91
36 * $Id: nameser.h,v 1.4 1993/10/27 00:10:40 mycroft Exp $
37 */
38
39#ifndef _NAMESER_H_
40#define _NAMESER_H_
41
42#if defined (__cplusplus)
43extern "C" {
44#endif
45
46#include <sys/param.h> /* htons() etc. */
47#include <machine/endian.h> /* BYTE ORDER etc. */
48#ifndef TCPV40HDRS
49#include "../types.h" /* #include <types.h> frequently includes the wrong header. */
50#include <sys/cdefs.h>
51#endif
52
53/*
54 * Define constants based on rfc883
55 */
56#define PACKETSZ 512 /* maximum packet size */
57#ifdef TCPV40HDRS
58#define MAXDNAME 256 /* maximum domain name */
59#else
60#define MAXDNAME 1025 /* maximum presentation domain name */
61#endif
62#define MAXCDNAME 255 /* maximum compressed domain name */
63#define MAXLABEL 63 /* maximum length of domain label */
64 /* Number of bytes of fixed size data in query structure */
65#define QFIXEDSZ 4
66 /* number of bytes of fixed size data in resource record */
67#define RRFIXEDSZ 10
68#ifndef TCPV40HDRS
69#define HFIXEDSZ 12 /* #/bytes of fixed data in header */
70#define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */
71#define INT32SZ 4 /* for systems without 32-bit ints */
72#define INT16SZ 2 /* for systems without 16-bit ints */
73#define INADDRSZ 4 /* IPv4 T_A */
74#define IN6ADDRSZ 16 /* IPv6 T_AAAA */
75#endif
76
77/*
78 * Internet nameserver port number
79 */
80#define NAMESERVER_PORT 53
81
82/*
83 * Currently defined opcodes
84 */
85#define QUERY 0x0 /* standard query */
86#define IQUERY 0x1 /* inverse query */
87#ifdef TCPV40HDRS
88#define CQUERYM 2 /* completion query (multiple) */
89#define CQUERYU 3 /* completion query (unique) */
90#endif
91#define STATUS 0x2 /* nameserver status query */
92/*#define xxx 0x3 0x3 reserved */
93 /* non standard */
94#ifdef TCPV40HDRS
95/* IBM has changed these codes in TCP/IP for OS/2 */
96#define UPDATEA 100 /* add resource record */
97#define UPDATED 101 /* delete a specific resource record */
98#define UPDATEM 102 /* modify a specific resource record */
99#define ZONEINIT 103 /* initial zone transfer */
100#define ZONEREF 104 /* incremental zone referesh */
101#else
102#define NS_NOTIFY_OP 0x4 /* notify secondary of SOA change */
103#endif
104
105/*
106 * Currently defined response codes
107 */
108#define NOERROR 0 /* no error */
109#define FORMERR 1 /* format error */
110#define SERVFAIL 2 /* server failure */
111#define NXDOMAIN 3 /* non existent domain */
112#define NOTIMP 4 /* not implemented */
113#define REFUSED 5 /* query refused */
114 /* non standard */
115#ifdef TCPV40HDRS
116#define NOCHANGE 100 /* update failed to change db */
117#endif
118
119/*
120 * Type values for resources and queries
121 */
122#define T_A 1 /* host address */
123#define T_NS 2 /* authoritative server */
124#define T_MD 3 /* mail destination */
125#define T_MF 4 /* mail forwarder */
126#define T_CNAME 5 /* connonical name */
127#define T_SOA 6 /* start of authority zone */
128#define T_MB 7 /* mailbox domain name */
129#define T_MG 8 /* mail group member */
130#define T_MR 9 /* mail rename name */
131#define T_NULL 10 /* null resource record */
132#define T_WKS 11 /* well known service */
133#define T_PTR 12 /* domain name pointer */
134#define T_HINFO 13 /* host information */
135#define T_MINFO 14 /* mailbox information */
136#define T_MX 15 /* mail routing information */
137#ifndef TCPV40HDRS
138#define T_TXT 16 /* text strings */
139#define T_RP 17 /* responsible person */
140#define T_AFSDB 18 /* AFS cell database */
141#define T_X25 19 /* X_25 calling address */
142#define T_ISDN 20 /* ISDN calling address */
143#define T_RT 21 /* router */
144#define T_NSAP 22 /* NSAP address */
145#define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */
146#define T_SIG 24 /* security signature */
147#define T_KEY 25 /* security key */
148#define T_PX 26 /* X.400 mail mapping */
149#define T_GPOS 27 /* geographical position (withdrawn) */
150#define T_AAAA 28 /* IP6 Address */
151#define T_LOC 29 /* Location Information */
152#define T_NXT 30 /* Next Valid Name in Zone */
153#define T_EID 31 /* Endpoint identifier */
154#define T_NIMLOC 32 /* Nimrod locator */
155#define T_SRV 33 /* Server selection */
156#define T_ATMA 34 /* ATM Address */
157#define T_NAPTR 35 /* Naming Authority PoinTeR */
158#endif
159 /* non standard */
160#define T_UINFO 100 /* user (finger) information */
161#define T_UID 101 /* user ID */
162#define T_GID 102 /* group ID */
163#ifndef TCPV40HDRS
164#define T_UNSPEC 103 /* Unspecified format (binary data) */
165#endif
166 /* Query type values which do not appear in resource records */
167#ifndef TCPV40HDRS
168#define T_IXFR 251 /* incremental zone transfer */
169#endif
170#define T_AXFR 252 /* transfer zone of authority */
171#define T_MAILB 253 /* transfer mailbox records */
172#define T_MAILA 254 /* transfer mail agent records */
173#define T_ANY 255 /* wildcard match */
174
175/*
176 * Values for class field
177 */
178#define C_IN 1 /* the arpa internet */
179#define C_CHAOS 3 /* for chaos net at MIT */
180#ifndef TCPV40HDRS
181#define C_HS 4 /* for Hesiod name server at MIT */
182#endif
183 /* Query class values which do not appear in resource records */
184#define C_ANY 255 /* wildcard match */
185
186/*
187 * Flags field of the KEY RR rdata
188 */
189#define KEYFLAG_TYPEMASK 0xC000 /* Mask for "type" bits */
190#define KEYFLAG_TYPE_AUTH_CONF 0x0000 /* Key usable for both */
191#define KEYFLAG_TYPE_CONF_ONLY 0x8000 /* Key usable for confidentiality */
192#define KEYFLAG_TYPE_AUTH_ONLY 0x4000 /* Key usable for authentication */
193#define KEYFLAG_TYPE_NO_KEY 0xC000 /* No key usable for either; no key */
194/* The type bits can also be interpreted independently, as single bits: */
195#define KEYFLAG_NO_AUTH 0x8000 /* Key not usable for authentication */
196#define KEYFLAG_NO_CONF 0x4000 /* Key not usable for confidentiality */
197
198#define KEYFLAG_EXPERIMENTAL 0x2000 /* Security is *mandatory* if bit=0 */
199#define KEYFLAG_RESERVED3 0x1000 /* reserved - must be zero */
200#define KEYFLAG_RESERVED4 0x0800 /* reserved - must be zero */
201#define KEYFLAG_USERACCOUNT 0x0400 /* key is assoc. with a user acct */
202#define KEYFLAG_ENTITY 0x0200 /* key is assoc. with entity eg host */
203#define KEYFLAG_ZONEKEY 0x0100 /* key is zone key for the zone named */
204#define KEYFLAG_IPSEC 0x0080 /* key is for IPSEC use (host or user)*/
205#define KEYFLAG_EMAIL 0x0040 /* key is for email (MIME security) */
206#define KEYFLAG_RESERVED10 0x0020 /* reserved - must be zero */
207#define KEYFLAG_RESERVED11 0x0010 /* reserved - must be zero */
208#define KEYFLAG_SIGNATORYMASK 0x000F /* key can sign DNS RR's of same name */
209
210#define KEYFLAG_RESERVED_BITMASK ( KEYFLAG_RESERVED3 | \
211 KEYFLAG_RESERVED4 | \
212 KEYFLAG_RESERVED10| KEYFLAG_RESERVED11)
213
214/* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
215#define ALGORITHM_MD5RSA 1 /* MD5 with RSA */
216#define ALGORITHM_EXPIRE_ONLY 253 /* No alg, no security */
217#define ALGORITHM_PRIVATE_OID 254 /* Key begins with OID indicating alg */
218
219/* Signatures */
220 /* Size of a mod or exp in bits */
221#define MIN_MD5RSA_KEY_PART_BITS 512
222#define MAX_MD5RSA_KEY_PART_BITS 2552
223 /* Total of binary mod and exp, bytes */
224#define MAX_MD5RSA_KEY_BYTES ((MAX_MD5RSA_KEY_PART_BITS+7/8)*2+3)
225 /* Max length of text sig block */
226#define MAX_KEY_BASE64 (((MAX_MD5RSA_KEY_BYTES+2)/3)*4)
227
228#ifndef TCPV40HDRS
229/*
230 * Status return codes for T_UNSPEC conversion routines
231 */
232#define CONV_SUCCESS 0
233#define CONV_OVERFLOW -1
234#define CONV_BADFMT -2
235#define CONV_BADCKSUM -3
236#define CONV_BADBUFLEN -4
237#endif
238
239/*
240 * Structure for query header, the order of the fields is machine and
241 * compiler dependent, in our case, the bits within a byte are assignd
242 * least significant first, while the order of transmition is most
243 * significant first. This requires a somewhat confusing rearrangement.
244 */
245#ifndef TCPV40HDRS
246#pragma pack(1)
247#endif
248typedef struct {
249 u_short id; /* query identification number */
250#if BYTE_ORDER == BIG_ENDIAN
251 /* fields in third byte */
252 u_char qr:1; /* response flag */
253 u_char opcode:4; /* purpose of message */
254 u_char aa:1; /* authoritive answer */
255 u_char tc:1; /* truncated message */
256 u_char rd:1; /* recursion desired */
257 /* fields in fourth byte */
258 u_char ra:1; /* recursion available */
259#ifdef TCPV40HDRS
260 u_char pr:1; /* primary server required (non standard) */
261 u_char unused:2; /* unused bits */
262#else
263 u_char unused :1; /* unused bits (MBZ as of 4.9.3a3) */
264 u_char ad: 1; /* authentic data from named */
265 u_char cd: 1; /* checking disabled by resolver */
266#endif
267 u_char rcode:4; /* response code */
268#endif
269#if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN
270 /* fields in third byte */
271 u_char rd:1; /* recursion desired */
272 u_char tc:1; /* truncated message */
273 u_char aa:1; /* authoritive answer */
274 u_char opcode:4; /* purpose of message */
275 u_char qr:1; /* response flag */
276 /* fields in fourth byte */
277 u_char rcode:4; /* response code */
278#ifdef TCPV40HDRS
279 u_char unused:2; /* unused bits */
280 u_char pr:1; /* primary server required (non standard) */
281#else
282 u_char cd: 1; /* checking disabled by resolver */
283 u_char ad: 1; /* authentic data from named */
284 u_char unused :1; /* unused bits (MBZ as of 4.9.3a3) */
285#endif
286 u_char ra:1; /* recursion available */
287#endif
288 /* remaining bytes */
289 u_short qdcount; /* number of question entries */
290 u_short ancount; /* number of answer entries */
291 u_short nscount; /* number of authority entries */
292 u_short arcount; /* number of resource entries */
293} HEADER;
294#ifndef TCPV40HDRS
295#pragma pack()
296#endif
297
298/*
299 * Defines for handling compressed domain names
300 */
301#define INDIR_MASK 0xc0
302
303#ifdef TCPV40HDRS
304/*
305 * Structure for passing resource records around.
306 */
307#pragma pack(4)
308struct rrec {
309 short r_zone; /* zone number */
310 short r_class; /* class number */
311 short r_type; /* type number */
312 u_long r_ttl; /* time to live */
313 int r_size; /* size of data area */
314 char *r_data; /* pointer to data */
315};
316#pragma pack()
317#endif
318
319#ifndef TCPV40HDRS
320/*
321 * Inline versions of get/put short/long. Pointer is advanced.
322 *
323 * These macros demonstrate the property of C whereby it can be
324 * portable or it can be elegant but rarely both.
325 */
326#define GETSHORT(s, cp) { \
327 register u_char *t_cp = (u_char *)(cp); \
328 (s) = ((u_int16_t)t_cp[0] << 8) \
329 | ((u_int16_t)t_cp[1]) \
330 ; \
331 (cp) += INT16SZ; \
332}
333
334#define GETLONG(l, cp) { \
335 register u_char *t_cp = (u_char *)(cp); \
336 (l) = ((u_int32_t)t_cp[0] << 24) \
337 | ((u_int32_t)t_cp[1] << 16) \
338 | ((u_int32_t)t_cp[2] << 8) \
339 | ((u_int32_t)t_cp[3]) \
340 ; \
341 (cp) += INT32SZ; \
342}
343
344#define PUTSHORT(s, cp) { \
345 register u_int16_t t_s = (u_int16_t)(s); \
346 register u_char *t_cp = (u_char *)(cp); \
347 *t_cp++ = t_s >> 8; \
348 *t_cp = t_s; \
349 (cp) += INT16SZ; \
350}
351
352#define PUTLONG(l, cp) { \
353 register u_int32_t t_l = (u_int32_t)(l); \
354 register u_char *t_cp = (u_char *)(cp); \
355 *t_cp++ = t_l >> 24; \
356 *t_cp++ = t_l >> 16; \
357 *t_cp++ = t_l >> 8; \
358 *t_cp = t_l; \
359 (cp) += INT32SZ; \
360}
361#endif /*!TCPV40HDRS*/
362
363
364/* function prototypes */
365u_short TCPCALL _getshort(u_char*);
366u_long TCPCALL _getlong(u_char*);
367#ifdef TCPV40HDRS /* newer have this in resolver */
368void TCPCALL putshort(u_short, u_char *);
369void TCPCALL putlong(u_long, u_char *);
370int TCPCALL dn_expand(const u_char*, const u_char*, const u_char*, u_char*, int);
371int TCPCALL dn_comp(const u_char*, u_char*, int, u_char**, u_char**);
372int TCPCALL dn_find(u_char*, u_char*, u_char**, u_char**);
373int TCPCALL dn_skipname(const u_char*, const u_char*);
374int TCPCALL res_init(void);
375int TCPCALL res_mkquery(int, const char*, int, int, const char*, int, const struct rrec*, char*, int);
376int TCPCALL res_send(const char*, int, char*, int);
377int TCPCALL res_query(char*, int, int, u_char*, int);
378int TCPCALL res_search(char*, int, int, u_char*, int);
379int TCPCALL res_querydomain(char*, char*, int, int, u_char*, int);
380#endif
381
382#if defined (__cplusplus)
383}
384#endif
385
386#endif /* !_NAMESER_H_ */
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