netdb.h revision 1.4 
1/*	$NetBSD: netdb.h,v 1.4 1994/10/26 00:56:09 cgd Exp $	*/
2
3/*-
4 * Copyright (c) 1980, 1983, 1988 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 *	@(#)netdb.h	5.15 (Berkeley) 4/3/91
36 */
37
38#ifndef _NETDB_H_
39#define _NETDB_H_
40
41#define	_PATH_HEQUIV	"/etc/hosts.equiv"
42#define	_PATH_HOSTS	"/etc/hosts"
43#define	_PATH_NETWORKS	"/etc/networks"
44#define	_PATH_PROTOCOLS	"/etc/protocols"
45#define	_PATH_SERVICES	"/etc/services"
46
47/*
48 * Structures returned by network data base library.  All addresses are
49 * supplied in host order, and returned in network order (suitable for
50 * use in system calls).
51 */
52struct	hostent {
53	char	*h_name;	/* official name of host */
54	char	**h_aliases;	/* alias list */
55	int	h_addrtype;	/* host address type */
56	int	h_length;	/* length of address */
57	char	**h_addr_list;	/* list of addresses from name server */
58#define	h_addr	h_addr_list[0]	/* address, for backward compatiblity */
59};
60
61/*
62 * Assumption here is that a network number
63 * fits in 32 bits -- probably a poor one.
64 */
65struct	netent {
66	char		*n_name;	/* official name of net */
67	char		**n_aliases;	/* alias list */
68	int		n_addrtype;	/* net address type */
69	unsigned long	n_net;		/* network # */
70};
71
72struct	servent {
73	char	*s_name;	/* official service name */
74	char	**s_aliases;	/* alias list */
75	int	s_port;		/* port # */
76	char	*s_proto;	/* protocol to use */
77};
78
79struct	protoent {
80	char	*p_name;	/* official protocol name */
81	char	**p_aliases;	/* alias list */
82	int	p_proto;	/* protocol # */
83};
84
85/*
86 * Error return codes from gethostbyname() and gethostbyaddr()
87 * (left in extern int h_errno).
88 */
89
90#define	HOST_NOT_FOUND	1 /* Authoritative Answer Host not found */
91#define	TRY_AGAIN	2 /* Non-Authoritive Host not found, or SERVERFAIL */
92#define	NO_RECOVERY	3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
93#define	NO_DATA		4 /* Valid name, no data record of requested type */
94#define	NO_ADDRESS	NO_DATA		/* no address, look for MX record */
95
96#include <sys/cdefs.h>
97
98__BEGIN_DECLS
99void		endhostent __P((void));
100void		endnetent __P((void));
101void		endprotoent __P((void));
102void		endservent __P((void));
103struct hostent	*gethostbyaddr __P((const char *, int, int));
104struct hostent	*gethostbyname __P((const char *));
105struct hostent	*gethostent __P((void));
106struct netent	*getnetbyaddr __P((long, int)); /* u_long? */
107struct netent	*getnetbyname __P((const char *));
108struct netent	*getnetent __P((void));
109struct protoent	*getprotobyname __P((const char *));
110struct protoent	*getprotobynumber __P((int));
111struct protoent	*getprotoent __P((void));
112struct servent	*getservbyname __P((const char *, const char *));
113struct servent	*getservbyport __P((int, const char *));
114struct servent	*getservent __P((void));
115void		herror __P((const char *));
116char		*hstrerror __P((int));
117void		sethostent __P((int));
118/* void		sethostfile __P((const char *)); */
119void		setnetent __P((int));
120void		setprotoent __P((int));
121void		setservent __P((int));
122__END_DECLS
123
124#endif /* !_NETDB_H_ */
125