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netdb.h revision 1.5 
      1 /*	$NetBSD: netdb.h,v 1.5 1995/07/03 22:59:12 jtc 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  */
     52 struct	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  */
     65 struct	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 
     72 struct	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 
     79 struct	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 extern int h_errno;
     91 
     92 #define	HOST_NOT_FOUND	1 /* Authoritative Answer Host not found */
     93 #define	TRY_AGAIN	2 /* Non-Authoritive Host not found, or SERVERFAIL */
     94 #define	NO_RECOVERY	3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
     95 #define	NO_DATA		4 /* Valid name, no data record of requested type */
     96 #define	NO_ADDRESS	NO_DATA		/* no address, look for MX record */
     97 
     98 #include <sys/cdefs.h>
     99 
    100 __BEGIN_DECLS
    101 void		endhostent __P((void));
    102 void		endnetent __P((void));
    103 void		endprotoent __P((void));
    104 void		endservent __P((void));
    105 struct hostent	*gethostbyaddr __P((const char *, int, int));
    106 struct hostent	*gethostbyname __P((const char *));
    107 struct hostent	*gethostent __P((void));
    108 struct netent	*getnetbyaddr __P((long, int)); /* u_long? */
    109 struct netent	*getnetbyname __P((const char *));
    110 struct netent	*getnetent __P((void));
    111 struct protoent	*getprotobyname __P((const char *));
    112 struct protoent	*getprotobynumber __P((int));
    113 struct protoent	*getprotoent __P((void));
    114 struct servent	*getservbyname __P((const char *, const char *));
    115 struct servent	*getservbyport __P((int, const char *));
    116 struct servent	*getservent __P((void));
    117 void		herror __P((const char *));
    118 char		*hstrerror __P((int));
    119 void		sethostent __P((int));
    120 /* void		sethostfile __P((const char *)); */
    121 void		setnetent __P((int));
    122 void		setprotoent __P((int));
    123 void		setservent __P((int));
    124 __END_DECLS
    125 
    126 #endif /* !_NETDB_H_ */
    127