xref: /freebsd/include/resolv.h (revision 59deaec541ae8baaa58daf6c5a2196ea7de180c3)
159deaec5SRodney W. Grimes /*-
259deaec5SRodney W. Grimes  * Copyright (c) 1983, 1987, 1989, 1993
359deaec5SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
459deaec5SRodney W. Grimes  *
559deaec5SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
659deaec5SRodney W. Grimes  * modification, are permitted provided that the following conditions
759deaec5SRodney W. Grimes  * are met:
859deaec5SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
959deaec5SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
1059deaec5SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
1159deaec5SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
1259deaec5SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
1359deaec5SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
1459deaec5SRodney W. Grimes  *    must display the following acknowledgement:
1559deaec5SRodney W. Grimes  *	This product includes software developed by the University of
1659deaec5SRodney W. Grimes  *	California, Berkeley and its contributors.
1759deaec5SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
1859deaec5SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
1959deaec5SRodney W. Grimes  *    without specific prior written permission.
2059deaec5SRodney W. Grimes  *
2159deaec5SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2259deaec5SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2359deaec5SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2459deaec5SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2559deaec5SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2659deaec5SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2759deaec5SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2859deaec5SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2959deaec5SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3059deaec5SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3159deaec5SRodney W. Grimes  * SUCH DAMAGE.
3259deaec5SRodney W. Grimes  *
3359deaec5SRodney W. Grimes  *	@(#)resolv.h	8.1 (Berkeley) 6/2/93
3459deaec5SRodney W. Grimes  *	$Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp $
3559deaec5SRodney W. Grimes  * -
3659deaec5SRodney W. Grimes  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
3759deaec5SRodney W. Grimes  *
3859deaec5SRodney W. Grimes  * Permission to use, copy, modify, and distribute this software for any
3959deaec5SRodney W. Grimes  * purpose with or without fee is hereby granted, provided that the above
4059deaec5SRodney W. Grimes  * copyright notice and this permission notice appear in all copies, and that
4159deaec5SRodney W. Grimes  * the name of Digital Equipment Corporation not be used in advertising or
4259deaec5SRodney W. Grimes  * publicity pertaining to distribution of the document or software without
4359deaec5SRodney W. Grimes  * specific, written prior permission.
4459deaec5SRodney W. Grimes  *
4559deaec5SRodney W. Grimes  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
4659deaec5SRodney W. Grimes  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
4759deaec5SRodney W. Grimes  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
4859deaec5SRodney W. Grimes  * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
4959deaec5SRodney W. Grimes  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
5059deaec5SRodney W. Grimes  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
5159deaec5SRodney W. Grimes  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
5259deaec5SRodney W. Grimes  * SOFTWARE.
5359deaec5SRodney W. Grimes  * -
5459deaec5SRodney W. Grimes  * --Copyright--
5559deaec5SRodney W. Grimes  */
5659deaec5SRodney W. Grimes 
5759deaec5SRodney W. Grimes #ifndef _RESOLV_H_
5859deaec5SRodney W. Grimes #define	_RESOLV_H_
5959deaec5SRodney W. Grimes 
6059deaec5SRodney W. Grimes #include <sys/types.h>
6159deaec5SRodney W. Grimes /*
6259deaec5SRodney W. Grimes  * Resolver configuration file.
6359deaec5SRodney W. Grimes  * Normally not present, but may contain the address of the
6459deaec5SRodney W. Grimes  * inital name server(s) to query and the domain search list.
6559deaec5SRodney W. Grimes  */
6659deaec5SRodney W. Grimes 
6759deaec5SRodney W. Grimes #ifndef _PATH_RESCONF
6859deaec5SRodney W. Grimes #define _PATH_RESCONF        "/etc/resolv.conf"
6959deaec5SRodney W. Grimes #endif
7059deaec5SRodney W. Grimes 
7159deaec5SRodney W. Grimes /*
7259deaec5SRodney W. Grimes  * Global defines and variables for resolver stub.
7359deaec5SRodney W. Grimes  */
7459deaec5SRodney W. Grimes #define	MAXNS			3	/* max # name servers we'll track */
7559deaec5SRodney W. Grimes #define	MAXDFLSRCH		3	/* # default domain levels to try */
7659deaec5SRodney W. Grimes #define	MAXDNSRCH		6	/* max # domains in search path */
7759deaec5SRodney W. Grimes #define	LOCALDOMAINPARTS	2	/* min levels in name that is "local" */
7859deaec5SRodney W. Grimes 
7959deaec5SRodney W. Grimes #define	RES_TIMEOUT		5	/* min. seconds between retries */
8059deaec5SRodney W. Grimes 
8159deaec5SRodney W. Grimes struct __res_state {
8259deaec5SRodney W. Grimes 	int	retrans;	 	/* retransmition time interval */
8359deaec5SRodney W. Grimes 	int	retry;			/* number of times to retransmit */
8459deaec5SRodney W. Grimes 	long	options;		/* option flags - see below. */
8559deaec5SRodney W. Grimes 	int	nscount;		/* number of name servers */
8659deaec5SRodney W. Grimes 	struct	sockaddr_in nsaddr_list[MAXNS];	/* address of name server */
8759deaec5SRodney W. Grimes #define	nsaddr	nsaddr_list[0]		/* for backward compatibility */
8859deaec5SRodney W. Grimes 	u_short	id;			/* current packet id */
8959deaec5SRodney W. Grimes 	char	*dnsrch[MAXDNSRCH+1];	/* components of domain to search */
9059deaec5SRodney W. Grimes 	char	defdname[MAXDNAME];	/* default domain */
9159deaec5SRodney W. Grimes 	long	pfcode;			/* RES_PRF_ flags - see below. */
9259deaec5SRodney W. Grimes };
9359deaec5SRodney W. Grimes 
9459deaec5SRodney W. Grimes /*
9559deaec5SRodney W. Grimes  * Resolver options (keep these in synch with res_debug.c, please)
9659deaec5SRodney W. Grimes  */
9759deaec5SRodney W. Grimes #define RES_INIT	0x0001		/* address initialized */
9859deaec5SRodney W. Grimes #define RES_DEBUG	0x0002		/* print debug messages */
9959deaec5SRodney W. Grimes #define RES_AAONLY	0x0004		/* authoritative answers only */
10059deaec5SRodney W. Grimes #define RES_USEVC	0x0008		/* use virtual circuit */
10159deaec5SRodney W. Grimes #define RES_PRIMARY	0x0010		/* query primary server only */
10259deaec5SRodney W. Grimes #define RES_IGNTC	0x0020		/* ignore trucation errors */
10359deaec5SRodney W. Grimes #define RES_RECURSE	0x0040		/* recursion desired */
10459deaec5SRodney W. Grimes #define RES_DEFNAMES	0x0080		/* use default domain name */
10559deaec5SRodney W. Grimes #define RES_STAYOPEN	0x0100		/* Keep TCP socket open */
10659deaec5SRodney W. Grimes #define RES_DNSRCH	0x0200		/* search up local domain tree */
10759deaec5SRodney W. Grimes 
10859deaec5SRodney W. Grimes #define RES_DEFAULT	(RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
10959deaec5SRodney W. Grimes 
11059deaec5SRodney W. Grimes /*
11159deaec5SRodney W. Grimes  * Resolver "pfcode" values.  Used by dig.
11259deaec5SRodney W. Grimes  */
11359deaec5SRodney W. Grimes #define RES_PRF_STATS	0x0001
11459deaec5SRodney W. Grimes /*			0x0002	*/
11559deaec5SRodney W. Grimes #define RES_PRF_CLASS   0x0004
11659deaec5SRodney W. Grimes #define RES_PRF_CMD	0x0008
11759deaec5SRodney W. Grimes #define RES_PRF_QUES	0x0010
11859deaec5SRodney W. Grimes #define RES_PRF_ANS	0x0020
11959deaec5SRodney W. Grimes #define RES_PRF_AUTH	0x0040
12059deaec5SRodney W. Grimes #define RES_PRF_ADD	0x0080
12159deaec5SRodney W. Grimes #define RES_PRF_HEAD1	0x0100
12259deaec5SRodney W. Grimes #define RES_PRF_HEAD2	0x0200
12359deaec5SRodney W. Grimes #define RES_PRF_TTLID	0x0400
12459deaec5SRodney W. Grimes #define RES_PRF_HEADX	0x0800
12559deaec5SRodney W. Grimes #define RES_PRF_QUERY	0x1000
12659deaec5SRodney W. Grimes #define RES_PRF_REPLY	0x2000
12759deaec5SRodney W. Grimes #define RES_PRF_INIT    0x4000
12859deaec5SRodney W. Grimes /*			0x8000	*/
12959deaec5SRodney W. Grimes 
13059deaec5SRodney W. Grimes #include <sys/cdefs.h>
13159deaec5SRodney W. Grimes #include <stdio.h>
13259deaec5SRodney W. Grimes 
13359deaec5SRodney W. Grimes extern struct __res_state _res;
13459deaec5SRodney W. Grimes 
13559deaec5SRodney W. Grimes /* Private routines shared between libc/net, named, nslookup and others. */
13659deaec5SRodney W. Grimes #define	dn_skipname	__dn_skipname
13759deaec5SRodney W. Grimes #define	fp_query	__fp_query
13859deaec5SRodney W. Grimes #define	hostalias	__hostalias
13959deaec5SRodney W. Grimes #define	putlong		__putlong
14059deaec5SRodney W. Grimes #define	putshort	__putshort
14159deaec5SRodney W. Grimes #define p_class		__p_class
14259deaec5SRodney W. Grimes #define p_time		__p_time
14359deaec5SRodney W. Grimes #define p_type		__p_type
14459deaec5SRodney W. Grimes __BEGIN_DECLS
14559deaec5SRodney W. Grimes int	 __dn_skipname __P((const u_char *, const u_char *));
14659deaec5SRodney W. Grimes void	 __fp_resstat __P((struct __res_state *, FILE *));
14759deaec5SRodney W. Grimes void	 __fp_query __P((char *, FILE *));
14859deaec5SRodney W. Grimes char	*__hostalias __P((const char *));
14959deaec5SRodney W. Grimes void	 __putlong __P((u_int32_t, u_char *));
15059deaec5SRodney W. Grimes void	 __putshort __P((u_short, u_char *));
15159deaec5SRodney W. Grimes char	*__p_class __P((int));
15259deaec5SRodney W. Grimes char	*__p_time __P((u_int32_t));
15359deaec5SRodney W. Grimes char	*__p_type __P((int));
15459deaec5SRodney W. Grimes 
15559deaec5SRodney W. Grimes int	 dn_comp __P((const u_char *, u_char *, int, u_char **, u_char **));
15659deaec5SRodney W. Grimes int	 dn_expand __P((const u_char *, const u_char *, const u_char *,
15759deaec5SRodney W. Grimes 			u_char *, int));
15859deaec5SRodney W. Grimes int	 res_init __P((void));
15959deaec5SRodney W. Grimes int	 res_mkquery __P((int, const char *, int, int, const char *, int,
16059deaec5SRodney W. Grimes 			  const char *, char *, int));
16159deaec5SRodney W. Grimes int	 res_send __P((const char *, int, char *, int));
16259deaec5SRodney W. Grimes __END_DECLS
16359deaec5SRodney W. Grimes 
16459deaec5SRodney W. Grimes #endif /* !_RESOLV_H_ */
165