[apple/libinfo.git] / dns.subproj / resolv.h

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.1 (the "License").  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * ++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: resolv.h,v 1.2 1999/10/14 21:56:45 wsanchez Exp $
 */

#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 *));
__END_DECLS

#endif /* !_RESOLV_H_ */
Commit	Line	Data
03fb6eb0 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.1 (the "License"). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License.
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* ++Copyright++ 1983, 1987, 1989, 1993
	26	* -
	27	* Copyright (c) 1983, 1987, 1989, 1993
	28	* The Regents of the University of California. All rights reserved.
	29	*
	30	* Redistribution and use in source and binary forms, with or without
	31	* modification, are permitted provided that the following conditions
	32	* are met:
	33	* 1. Redistributions of source code must retain the above copyright
	34	* notice, this list of conditions and the following disclaimer.
	35	* 2. Redistributions in binary form must reproduce the above copyright
	36	* notice, this list of conditions and the following disclaimer in the
	37	* documentation and/or other materials provided with the distribution.
	38	* 3. All advertising materials mentioning features or use of this software
	39	* must display the following acknowledgement:
	40	* This product includes software developed by the University of
	41	* California, Berkeley and its contributors.
	42	* 4. Neither the name of the University nor the names of its contributors
	43	* may be used to endorse or promote products derived from this software
	44	* without specific prior written permission.
	45	*
	46	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	47	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	48	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	49	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	50	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	51	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	52	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	53	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	54	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	55	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	56	* SUCH DAMAGE.
	57	* -
	58	* Portions Copyright (c) 1993 by Digital Equipment Corporation.
	59	*
	60	* Permission to use, copy, modify, and distribute this software for any
	61	* purpose with or without fee is hereby granted, provided that the above
	62	* copyright notice and this permission notice appear in all copies, and that
	63	* the name of Digital Equipment Corporation not be used in advertising or
	64	* publicity pertaining to distribution of the document or software without
65	* specific, written prior permission.
66	*
67	* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
68	* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
69	* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
70	* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
71	* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
72	* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
73	* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
74	* SOFTWARE.
75	* -
76	* --Copyright--
77	*/
78
79	/*
80	* @(#)resolv.h 8.1 (Berkeley) 6/2/93
81	* $Id: resolv.h,v 1.2 1999/10/14 21:56:45 wsanchez Exp $
82	*/
83
84	#ifndef _RESOLV_H_
85	#define _RESOLV_H_
86
87	#include <sys/param.h>
88	#if (!defined(BSD)) \|\| (BSD < 199306)
89	# include <sys/bitypes.h>
90	#else
91	# include <sys/types.h>
92	#endif
93	#include <sys/cdefs.h>
94	#include <stdio.h>
95
96	/*
97	* revision information. this is the release date in YYYYMMDD format.
98	* it can change every day so the right thing to do with it is use it
99	* in preprocessor commands such as "#if (__RES > 19931104)". do not
100	* compare for equality; rather, use it to determine whether your resolver
101	* is new enough to contain a certain feature.
102	*/
103
104	#define __RES 19950621
105
106	/*
107	* Resolver configuration file.
108	* Normally not present, but may contain the address of the
109	* inital name server(s) to query and the domain search list.
110	*/
111
112	#ifndef _PATH_RESCONF
113	#define _PATH_RESCONF "/etc/resolv.conf"
114	#endif
115
116	/*
117	* Global defines and variables for resolver stub.
118	*/
119	#define MAXNS 3 /* max # name servers we'll track */
120	#define MAXDFLSRCH 3 /* # default domain levels to try */
121	#define MAXDNSRCH 6 /* max # domains in search path */
122	#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
123
124	#define RES_TIMEOUT 5 /* min. seconds between retries */
125	#define MAXRESOLVSORT 10 /* number of net to sort on */
126	#define RES_MAXNDOTS 15 /* should reflect bit field size */
127
128	struct __res_state {
129	int retrans; /* retransmition time interval */
130	int retry; /* number of times to retransmit */
131	u_long options; /* option flags - see below. */
132	int nscount; /* number of name servers */
133	struct sockaddr_in
134	nsaddr_list[MAXNS]; /* address of name server */
135	#define nsaddr nsaddr_list[0] /* for backward compatibility */
136	u_short id; /* current packet id */
137	char dnsrch[MAXDNSRCH+1]; / components of domain to search */
138	char defdname[MAXDNAME]; /* default domain */
139	u_long pfcode; /* RES_PRF_ flags - see below. */
140	unsigned ndots:4; /* threshold for initial abs. query */
141	unsigned nsort:4; /* number of elements in sort_list[] */
142	char unused[3];
143	struct {
144	struct in_addr addr;
145	u_int32_t mask;
146	} sort_list[MAXRESOLVSORT];
147	};
148
149	/*
150	* Resolver options (keep these in synch with res_debug.c, please)
151	*/
152	#define RES_INIT 0x00000001 /* address initialized */
153	#define RES_DEBUG 0x00000002 /* print debug messages */
154	#define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/
155	#define RES_USEVC 0x00000008 /* use virtual circuit */
156	#define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */
157	#define RES_IGNTC 0x00000020 /* ignore trucation errors */
158	#define RES_RECURSE 0x00000040 /* recursion desired */
159	#define RES_DEFNAMES 0x00000080 /* use default domain name */
160	#define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
161	#define RES_DNSRCH 0x00000200 /* search up local domain tree */
162	#define RES_INSECURE1 0x00000400 /* type 1 security disabled */
163	#define RES_INSECURE2 0x00000800 /* type 2 security disabled */
164	#define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
165
166	#define RES_DEFAULT (RES_RECURSE \| RES_DEFNAMES \| RES_DNSRCH)
167
168	/*
169	* Resolver "pfcode" values. Used by dig.
170	*/
171	#define RES_PRF_STATS 0x00000001
172	/* 0x00000002 */
173	#define RES_PRF_CLASS 0x00000004
174	#define RES_PRF_CMD 0x00000008
175	#define RES_PRF_QUES 0x00000010
176	#define RES_PRF_ANS 0x00000020
177	#define RES_PRF_AUTH 0x00000040
178	#define RES_PRF_ADD 0x00000080
179	#define RES_PRF_HEAD1 0x00000100
180	#define RES_PRF_HEAD2 0x00000200
181	#define RES_PRF_TTLID 0x00000400
182	#define RES_PRF_HEADX 0x00000800
183	#define RES_PRF_QUERY 0x00001000
184	#define RES_PRF_REPLY 0x00002000
185	#define RES_PRF_INIT 0x00004000
186	/* 0x00008000 */
187
188	/* hooks are still experimental as of 4.9.2 */
189	typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
190	res_sendhookact;
191
192	typedef res_sendhookact (res_send_qhook)__P((struct sockaddr_in const *ns,
193	const u_char **query,
194	int *querylen,
195	u_char *ans,
196	int anssiz,
197	int *resplen));
198
199	typedef res_sendhookact (res_send_rhook)__P((const struct sockaddr_in ns,
200	const u_char *query,
201	int querylen,
202	u_char *ans,
203	int anssiz,
204	int *resplen));
205
206	extern struct __res_state _res;
207
208	/* Private routines shared between libc/net, named, nslookup and others. */
209	#define dn_skipname __dn_skipname
210	#define fp_query __fp_query
211	#define fp_nquery __fp_nquery
212	#define hostalias __hostalias
213	#define putlong __putlong
214	#define putshort __putshort
215	#define p_class __p_class
216	#define p_time __p_time
217	#define p_type __p_type
218	#define p_cdnname __p_cdnname
219	#define p_cdname __p_cdname
220	#define p_fqname __p_fqname
221	#define p_rr __p_rr
222	#define p_option __p_option
223	#define res_randomid __res_randomid
224	#define res_isourserver __res_isourserver
225	#define res_nameinquery __res_nameinquery
226	#define res_queriesmatch __res_queriesmatch
227	__BEGIN_DECLS
228	int __dn_skipname __P((const u_char , const u_char ));
229	void __fp_resstat __P((struct __res_state , FILE ));
230	void __fp_query __P((const u_char , FILE ));
231	void __fp_nquery __P((const u_char , int, FILE ));
232	char __hostalias __P((const char ));
233	void __putlong __P((u_int32_t, u_char *));
234	void __putshort __P((u_int16_t, u_char *));
235	char *__p_time __P((u_int32_t));
236	void __p_query __P((const u_char *));
237	const u_char __p_cdnname __P((const u_char , const u_char , int, FILE ));
238	const u_char __p_cdname __P((const u_char , const u_char , FILE ));
239	const u_char __p_fqname __P((const u_char , const u_char , FILE ));
240	const u_char __p_rr __P((const u_char , const u_char , FILE ));
241	const char *__p_type __P((int));
242	const char *__p_class __P((int));
243	const char *__p_option __P((u_long option));
244	int dn_comp __P((const char , u_char , int, u_char , u_char ));
245	int dn_expand __P((const u_char , const u_char , const u_char *,
246	char *, int));
247	int res_init __P((void));
248	u_int16_t res_randomid __P((void));
249	int res_query __P((const char , int, int, u_char , int));
250	int res_search __P((const char , int, int, u_char , int));
251	int res_querydomain __P((const char , const char , int, int,
252	u_char *, int));
253	int res_mkquery __P((int, const char , int, int, const u_char , int,
254	const u_char , u_char , int));
255	int res_send __P((const u_char , int, u_char , int));
256	int res_isourserver __P((const struct sockaddr_in *));
257	int res_nameinquery __P((const char *, int, int,
258	const u_char , const u_char ));
259	int res_queriesmatch __P((const u_char , const u_char ,
260	const u_char , const u_char ));
261	__END_DECLS
262
263	#endif /* !_RESOLV_H_ */