/*-
 * Copyright (c) 1980, 1983, 1988 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.
 *
 *	@(#)netdb.h	5.15 (Berkeley) 4/3/91
 */

#ifndef _NETDB_H_
#define _NETDB_H_

#define _PATH_HEQUIV "/etc/hosts.equiv"
#define _PATH_HOSTS "/etc/hosts"
#define _PATH_NETWORKS "/etc/networks"
#define _PATH_PROTOCOLS "/etc/protocols"
#define _PATH_SERVICES "/etc/services"

/*
 * Structures returned by network data base library.  All addresses are
 * supplied in host order, and returned in network order (suitable for
 * use in system calls).
 */
struct hostent {
    char *h_name;             /* official name of host */
    char **h_aliases;         /* alias list */
    int h_addrtype;           /* host address type */
    int h_length;             /* length of address */
    char **h_addr_list;       /* list of addresses from name server */
#define h_addr h_addr_list[0] /* address, for backward compatiblity */
};

/*
 * Assumption here is that a network number
 * fits in 32 bits -- probably a poor one.
 */
struct netent {
    char *n_name;        /* official name of net */
    char **n_aliases;    /* alias list */
    int n_addrtype;      /* net address type */
    unsigned long n_net; /* network # */
};

struct servent {
    char *s_name;     /* official service name */
    char **s_aliases; /* alias list */
    int s_port;       /* port # */
    char *s_proto;    /* protocol to use */
};

struct protoent {
    char *p_name;     /* official protocol name */
    char **p_aliases; /* alias list */
    int p_proto;      /* protocol # */
};

/*
 * Error return codes from gethostbyname() and gethostbyaddr()
 * (left in extern int h_errno).
 */

#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */
#define TRY_AGAIN 2      /* Non-Authoritive Host not found, or SERVERFAIL */
#define NO_RECOVERY 3    /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
#define NO_DATA 4        /* Valid name, no data record of requested type */
#define NO_ADDRESS NO_DATA /* no address, look for MX record */

#include <sys/cdefs.h>

__BEGIN_DECLS
void endhostent __P((void));
void endnetent __P((void));
void endprotoent __P((void));
/* void		endservent __P((void));	*/
struct hostent *gethostbyaddr __P((const char *, int, int));
struct hostent *gethostbyname __P((char *));
struct hostent *gethostent __P((void));
struct netent *getnetbyaddr __P((long, int)); /* u_long? */
struct netent *getnetbyname __P((const char *));
struct netent *getnetent __P((void));
struct protoent *getprotobyname __P((const char *));
struct protoent *getprotobynumber __P((int));
struct protoent *getprotoent __P((void));
struct servent *getservbyname __P((const char *, const char *));
struct servent *getservbyport __P((int, const char *));
struct servent *getservent __P((void));
void herror __P((const char *));
void sethostent __P((int));
/* void		sethostfile __P((const char *)); */
void setnetent __P((int));
void setprotoent __P((int));
/* void		setservent __P((int));	*/
__END_DECLS

#endif /* !_NETDB_H_ */
