aboutsummaryrefslogtreecommitdiff
path: root/resolv/resolv.h
blob: af92be4c059f337a171a5519792d6b88f7e8245b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
/*
 * ++Copyright++ 1983, 1987, 1989, 1993
 * -
 * Copyright (c) 1983, 1987, 1989, 1993
 *    The Regents of the University of California.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 	This product includes software developed by the University of
 * 	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * -
 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
 * 
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies, and that
 * the name of Digital Equipment Corporation not be used in advertising or
 * publicity pertaining to distribution of the document or software without
 * specific, written prior permission.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 * -
 * --Copyright--
 */

/*
 *	@(#)resolv.h	8.1 (Berkeley) 6/2/93
 *	$Id$
 */

#ifndef _RESOLV_H_
#define	_RESOLV_H_

#include <sys/param.h>
#if (!defined(BSD)) || (BSD < 199306)
# include <sys/bitypes.h>
#else
# include <sys/types.h>
#endif
#include <sys/cdefs.h>
#include <stdio.h>

/*
 * revision information.  this is the release date in YYYYMMDD format.
 * it can change every day so the right thing to do with it is use it
 * in preprocessor commands such as "#if (__RES > 19931104)".  do not
 * compare for equality; rather, use it to determine whether your resolver
 * is new enough to contain a certain feature.
 */

#define	__RES	19950621

/*
 * Resolver configuration file.
 * Normally not present, but may contain the address of the
 * inital name server(s) to query and the domain search list.
 */

#ifndef _PATH_RESCONF
#define _PATH_RESCONF        "/etc/resolv.conf"
#endif

/*
 * Global defines and variables for resolver stub.
 */
#define	MAXNS			3	/* max # name servers we'll track */
#define	MAXDFLSRCH		3	/* # default domain levels to try */
#define	MAXDNSRCH		6	/* max # domains in search path */
#define	LOCALDOMAINPARTS	2	/* min levels in name that is "local" */

#define	RES_TIMEOUT		5	/* min. seconds between retries */
#define	MAXRESOLVSORT		10	/* number of net to sort on */
#define	RES_MAXNDOTS		15	/* should reflect bit field size */

struct __res_state {
	int	retrans;	 	/* retransmition time interval */
	int	retry;			/* number of times to retransmit */
	u_long	options;		/* option flags - see below. */
	int	nscount;		/* number of name servers */
	struct sockaddr_in
		nsaddr_list[MAXNS];	/* address of name server */
#define	nsaddr	nsaddr_list[0]		/* for backward compatibility */
	u_short	id;			/* current packet id */
	char	*dnsrch[MAXDNSRCH+1];	/* components of domain to search */
	char	defdname[MAXDNAME];	/* default domain */
	u_long	pfcode;			/* RES_PRF_ flags - see below. */
	unsigned ndots:4;		/* threshold for initial abs. query */
	unsigned nsort:4;		/* number of elements in sort_list[] */
	char	unused[3];
	struct {
		struct in_addr	addr;
		u_int32_t	mask;
	} sort_list[MAXRESOLVSORT];
};

/*
 * Resolver options (keep these in synch with res_debug.c, please)
 */
#define RES_INIT	0x00000001	/* address initialized */
#define RES_DEBUG	0x00000002	/* print debug messages */
#define RES_AAONLY	0x00000004	/* authoritative answers only (!IMPL)*/
#define RES_USEVC	0x00000008	/* use virtual circuit */
#define RES_PRIMARY	0x00000010	/* query primary server only (!IMPL) */
#define RES_IGNTC	0x00000020	/* ignore trucation errors */
#define RES_RECURSE	0x00000040	/* recursion desired */
#define RES_DEFNAMES	0x00000080	/* use default domain name */
#define RES_STAYOPEN	0x00000100	/* Keep TCP socket open */
#define RES_DNSRCH	0x00000200	/* search up local domain tree */
#define	RES_INSECURE1	0x00000400	/* type 1 security disabled */
#define	RES_INSECURE2	0x00000800	/* type 2 security disabled */
#define	RES_NOALIASES	0x00001000	/* shuts off HOSTALIASES feature */

#define RES_DEFAULT	(RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)

/*
 * Resolver "pfcode" values.  Used by dig.
 */
#define RES_PRF_STATS	0x00000001
/*			0x00000002	*/
#define RES_PRF_CLASS   0x00000004
#define RES_PRF_CMD	0x00000008
#define RES_PRF_QUES	0x00000010
#define RES_PRF_ANS	0x00000020
#define RES_PRF_AUTH	0x00000040
#define RES_PRF_ADD	0x00000080
#define RES_PRF_HEAD1	0x00000100
#define RES_PRF_HEAD2	0x00000200
#define RES_PRF_TTLID	0x00000400
#define RES_PRF_HEADX	0x00000800
#define RES_PRF_QUERY	0x00001000
#define RES_PRF_REPLY	0x00002000
#define RES_PRF_INIT    0x00004000
/*			0x00008000	*/

/* hooks are still experimental as of 4.9.2 */
typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
	res_sendhookact;

typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns,
					      const u_char **query,
					      int *querylen,
					      u_char *ans,
					      int anssiz,
					      int *resplen));

typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns,
					      const u_char *query,
					      int querylen,
					      u_char *ans,
					      int anssiz,
					      int *resplen));

extern struct __res_state _res;

/* Private routines shared between libc/net, named, nslookup and others. */
#define	dn_skipname	__dn_skipname
#define	fp_query	__fp_query
#define	fp_nquery	__fp_nquery
#define	hostalias	__hostalias
#define	putlong		__putlong
#define	putshort	__putshort
#define p_class		__p_class
#define p_time		__p_time
#define p_type		__p_type
#define	p_cdnname	__p_cdnname
#define	p_cdname	__p_cdname
#define	p_fqname	__p_fqname
#define	p_rr		__p_rr
#define	p_option	__p_option
#define	res_randomid	__res_randomid
#define	res_isourserver	__res_isourserver
#define	res_nameinquery	__res_nameinquery
#define	res_queriesmatch __res_queriesmatch
__BEGIN_DECLS
int	 __dn_skipname __P((const u_char *, const u_char *));
void	 __fp_resstat __P((struct __res_state *, FILE *));
void	 __fp_query __P((const u_char *, FILE *));
void	 __fp_nquery __P((const u_char *, int, FILE *));
char	*__hostalias __P((const char *));
void	 __putlong __P((u_int32_t, u_char *));
void	 __putshort __P((u_int16_t, u_char *));
char	*__p_time __P((u_int32_t));
void	 __p_query __P((const u_char *));
const u_char *__p_cdnname __P((const u_char *, const u_char *, int, FILE *));
const u_char *__p_cdname __P((const u_char *, const u_char *, FILE *));
const u_char *__p_fqname __P((const u_char *, const u_char *, FILE *));
const u_char *__p_rr __P((const u_char *, const u_char *, FILE *));
const char *__p_type __P((int));
const char *__p_class __P((int));
const char *__p_option __P((u_long option));
int	 dn_comp __P((const char *, u_char *, int, u_char **, u_char **));
int	 dn_expand __P((const u_char *, const u_char *, const u_char *,
			char *, int));
int	 res_init __P((void));
u_int16_t res_randomid __P((void));
int	 res_query __P((const char *, int, int, u_char *, int));
int	 res_search __P((const char *, int, int, u_char *, int));
int	 res_querydomain __P((const char *, const char *, int, int,
			      u_char *, int));
int	 res_mkquery __P((int, const char *, int, int, const u_char *, int,
			  const u_char *, u_char *, int));
int	 res_send __P((const u_char *, int, u_char *, int));
int	 res_isourserver __P((const struct sockaddr_in *));
int	 res_nameinquery __P((const char *, int, int,
			      const u_char *, const u_char *));
int	 res_queriesmatch __P((const u_char *, const u_char *,
			       const u_char *, const u_char *));
/* XXX - these last two don't belong in the resolver */
u_int	 inet_nsap_addr __P((const char *, u_char *, int maxlen));
char	*inet_nsap_ntoa __P((int, const u_char *, char *ascii));
__END_DECLS

#endif /* !_RESOLV_H_ */