Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / nameser.h
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66170f0a 1/* @(#) $Header: /tcpdump/master/tcpdump/nameser.h,v 1.14.4.2 2006/11/10 03:15:35 guy Exp $ (LBL) */
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2/*
3 * Copyright (c) 1983, 1989, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)nameser.h 8.2 (Berkeley) 2/16/94
35 * -
36 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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, and that
41 * the name of Digital Equipment Corporation not be used in advertising or
42 * publicity pertaining to distribution of the document or software without
43 * specific, written prior permission.
44 *
45 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
46 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
47 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
48 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
49 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
50 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
51 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
52 * SOFTWARE.
53 * -
54 * --Copyright--
55 */
56
57#ifndef _NAMESER_H_
58#define _NAMESER_H_
59
60#include <sys/types.h>
61
62/*
63 * Define constants based on rfc883
64 */
65#define PACKETSZ 512 /* maximum packet size */
66#define MAXDNAME 256 /* maximum domain name */
67#define MAXCDNAME 255 /* maximum compressed domain name */
68#define MAXLABEL 63 /* maximum length of domain label */
69 /* Number of bytes of fixed size data in query structure */
70#define QFIXEDSZ 4
71 /* number of bytes of fixed size data in resource record */
72#define RRFIXEDSZ 10
73
74/*
75 * Internet nameserver port number
76 */
77#define NAMESERVER_PORT 53
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78
79/*
80 * Port for multicast DNS; see
81 *
82 * http://files.multicastdns.org/draft-cheshire-dnsext-multicastdns.txt
83 *
84 * for the current mDNS spec.
85 */
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86#define MULTICASTDNS_PORT 5353
87
88/*
89 * Currently defined opcodes
90 */
91#define QUERY 0x0 /* standard query */
92#define IQUERY 0x1 /* inverse query */
93#define STATUS 0x2 /* nameserver status query */
94#if 0
95#define xxx 0x3 /* 0x3 reserved */
96#endif
97 /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */
98#define UPDATEA 0x9 /* add resource record */
99#define UPDATED 0xa /* delete a specific resource record */
100#define UPDATEDA 0xb /* delete all named resource record */
101#define UPDATEM 0xc /* modify a specific resource record */
102#define UPDATEMA 0xd /* modify all named resource record */
103
104#define ZONEINIT 0xe /* initial zone transfer */
105#define ZONEREF 0xf /* incremental zone referesh */
106
107/*
108 * Undefine various #defines from various System V-flavored OSes (Solaris,
109 * SINIX, HP-UX) so the compiler doesn't whine that we redefine them.
110 */
111#ifdef T_NULL
112#undef T_NULL
113#endif
114#ifdef T_OPT
115#undef T_OPT
116#endif
117#ifdef T_UNSPEC
118#undef T_UNSPEC
119#endif
120#ifdef NOERROR
121#undef NOERROR
122#endif
123
124/*
125 * Currently defined response codes
126 */
127#define NOERROR 0 /* no error */
128#define FORMERR 1 /* format error */
129#define SERVFAIL 2 /* server failure */
130#define NXDOMAIN 3 /* non existent domain */
131#define NOTIMP 4 /* not implemented */
132#define REFUSED 5 /* query refused */
133 /* non standard */
134#define NOCHANGE 0xf /* update failed to change db */
135
136/*
137 * Type values for resources and queries
138 */
139#define T_A 1 /* host address */
140#define T_NS 2 /* authoritative server */
141#define T_MD 3 /* mail destination */
142#define T_MF 4 /* mail forwarder */
143#define T_CNAME 5 /* connonical name */
144#define T_SOA 6 /* start of authority zone */
145#define T_MB 7 /* mailbox domain name */
146#define T_MG 8 /* mail group member */
147#define T_MR 9 /* mail rename name */
148#define T_NULL 10 /* null resource record */
149#define T_WKS 11 /* well known service */
150#define T_PTR 12 /* domain name pointer */
151#define T_HINFO 13 /* host information */
152#define T_MINFO 14 /* mailbox information */
153#define T_MX 15 /* mail routing information */
154#define T_TXT 16 /* text strings */
155#define T_RP 17 /* responsible person */
156#define T_AFSDB 18 /* AFS cell database */
157#define T_X25 19 /* X_25 calling address */
158#define T_ISDN 20 /* ISDN calling address */
159#define T_RT 21 /* router */
160#define T_NSAP 22 /* NSAP address */
161#define T_NSAP_PTR 23 /* reverse lookup for NSAP */
162#define T_SIG 24 /* security signature */
163#define T_KEY 25 /* security key */
164#define T_PX 26 /* X.400 mail mapping */
165#define T_GPOS 27 /* geographical position (withdrawn) */
166#define T_AAAA 28 /* IP6 Address */
167#define T_LOC 29 /* Location Information */
168#define T_NXT 30 /* Next Valid Name in Zone */
169#define T_EID 31 /* Endpoint identifier */
170#define T_NIMLOC 32 /* Nimrod locator */
171#define T_SRV 33 /* Server selection */
172#define T_ATMA 34 /* ATM Address */
173#define T_NAPTR 35 /* Naming Authority PoinTeR */
174#define T_KX 36 /* Key Exchanger */
175#define T_CERT 37 /* Certificates in the DNS */
176#define T_A6 38 /* IP6 address */
177#define T_DNAME 39 /* non-terminal redirection */
178#define T_SINK 40 /* unknown */
179#define T_OPT 41 /* EDNS0 option (meta-RR) */
180#define T_APL 42 /* lists of address prefixes */
181#define T_DS 43 /* Delegation Signer */
182#define T_SSHFP 44 /* SSH Fingerprint */
183#define T_IPSECKEY 45 /* IPsec keying material */
184#define T_RRSIG 46 /* new security signature */
185#define T_NSEC 47 /* provable insecure information */
186#define T_DNSKEY 48 /* new security key */
187 /* non standard */
188#define T_SPF 99 /* sender policy framework */
189#define T_UINFO 100 /* user (finger) information */
190#define T_UID 101 /* user ID */
191#define T_GID 102 /* group ID */
192#define T_UNSPEC 103 /* Unspecified format (binary data) */
193#define T_UNSPECA 104 /* "unspecified ascii". Ugly MIT hack */
194 /* Query type values which do not appear in resource records */
195#define T_TKEY 249 /* Transaction Key [RFC2930] */
196#define T_TSIG 250 /* Transaction Signature [RFC2845] */
197#define T_IXFR 251 /* incremental transfer [RFC1995] */
198#define T_AXFR 252 /* transfer zone of authority */
199#define T_MAILB 253 /* transfer mailbox records */
200#define T_MAILA 254 /* transfer mail agent records */
201#define T_ANY 255 /* wildcard match */
202
203/*
204 * Values for class field
205 */
206
207#define C_IN 1 /* the arpa internet */
208#define C_CHAOS 3 /* for chaos net (MIT) */
209#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */
210 /* Query class values which do not appear in resource records */
211#define C_ANY 255 /* wildcard match */
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212#define C_QU 0x8000 /* mDNS QU flag in queries */
213#define C_CACHE_FLUSH 0x8000 /* mDNS cache flush flag in replies */
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214
215/*
216 * Status return codes for T_UNSPEC conversion routines
217 */
218#define CONV_SUCCESS 0
219#define CONV_OVERFLOW -1
220#define CONV_BADFMT -2
221#define CONV_BADCKSUM -3
222#define CONV_BADBUFLEN -4
223
224/*
225 * Structure for query header.
226 */
227typedef struct {
228 u_int16_t id; /* query identification number */
229 u_int8_t flags1; /* first byte of flags */
230 u_int8_t flags2; /* second byte of flags */
231 u_int16_t qdcount; /* number of question entries */
232 u_int16_t ancount; /* number of answer entries */
233 u_int16_t nscount; /* number of authority entries */
234 u_int16_t arcount; /* number of resource entries */
235} HEADER;
236
237/*
238 * Macros for subfields of flag fields.
239 */
240#define DNS_QR(np) ((np)->flags1 & 0x80) /* response flag */
241#define DNS_OPCODE(np) ((((np)->flags1) >> 3) & 0xF) /* purpose of message */
242#define DNS_AA(np) ((np)->flags1 & 0x04) /* authoritative answer */
243#define DNS_TC(np) ((np)->flags1 & 0x02) /* truncated message */
244#define DNS_RD(np) ((np)->flags1 & 0x01) /* recursion desired */
245
246#define DNS_RA(np) ((np)->flags2 & 0x80) /* recursion available */
247#define DNS_AD(np) ((np)->flags2 & 0x20) /* authentic data from named */
248#define DNS_CD(np) ((np)->flags2 & 0x10) /* checking disabled by resolver */
249#define DNS_RCODE(np) ((np)->flags2 & 0xF) /* response code */
250
251/*
252 * Defines for handling compressed domain names, EDNS0 labels, etc.
253 */
254#define INDIR_MASK 0xc0 /* 11.... */
255#define EDNS0_MASK 0x40 /* 01.... */
256# define EDNS0_ELT_BITLABEL 0x01
257
258/*
259 * Structure for passing resource records around.
260 */
261struct rrec {
262 int16_t r_zone; /* zone number */
263 int16_t r_class; /* class number */
264 int16_t r_type; /* type number */
265 u_int32_t r_ttl; /* time to live */
266 int r_size; /* size of data area */
267 char *r_data; /* pointer to data */
268};
269
270/*
271 * Inline versions of get/put short/long. Pointer is advanced.
272 * We also assume that a "u_int16_t" holds 2 "chars"
273 * and that a "u_int32_t" holds 4 "chars".
274 *
275 * These macros demonstrate the property of C whereby it can be
276 * portable or it can be elegant but never both.
277 */
278#define GETSHORT(s, cp) { \
279 register u_char *t_cp = (u_char *)(cp); \
280 (s) = ((u_int16_t)t_cp[0] << 8) | (u_int16_t)t_cp[1]; \
281 (cp) += 2; \
282}
283
284#define GETLONG(l, cp) { \
285 register u_char *t_cp = (u_char *)(cp); \
286 (l) = (((u_int32_t)t_cp[0]) << 24) \
287 | (((u_int32_t)t_cp[1]) << 16) \
288 | (((u_int32_t)t_cp[2]) << 8) \
289 | (((u_int32_t)t_cp[3])); \
290 (cp) += 4; \
291}
292
293#define PUTSHORT(s, cp) { \
294 register u_int16_t t_s = (u_int16_t)(s); \
295 register u_char *t_cp = (u_char *)(cp); \
296 *t_cp++ = t_s >> 8; \
297 *t_cp = t_s; \
298 (cp) += 2; \
299}
300
301/*
302 * Warning: PUTLONG --no-longer-- destroys its first argument. if you
303 * were depending on this "feature", you will lose.
304 */
305#define PUTLONG(l, cp) { \
306 register u_int32_t t_l = (u_int32_t)(l); \
307 register u_char *t_cp = (u_char *)(cp); \
308 *t_cp++ = t_l >> 24; \
309 *t_cp++ = t_l >> 16; \
310 *t_cp++ = t_l >> 8; \
311 *t_cp = t_l; \
312 (cp) += 4; \
313}
314
315#endif /* !_NAMESER_H_ */