#ifndef __NETDB_H__#define __NETDB_H__ #ifndef _BSD_EXTENSION    This header file is an extension to ANSI/POSIX#endif #pragma lib "/$M/lib/ape/libbsd.a" /*- * Copyright (c) 1980, 1983, 1988 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that: (1) source distributions retain this entire copyright * notice and comment, and (2) distributions including binaries display * the following acknowledgement:  ``This product includes software * developed by the University of California, Berkeley and its contributors'' * in the documentation or other materials provided with the distribution * and in all advertising materials mentioning features or use of this * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * *	@(#)netdb.h	5.11 (Berkeley) 5/21/90 */ #ifdef __cplusplusextern "C" {#endif /* * 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 # */}; /* from 4.0 RPCSRC */struct rpcent {	char	*r_name;	/* name of server for this rpc program */	char	**r_aliases;	/* alias list */	int	r_number;	/* rpc program number */}; extern struct hostent	*gethostbyname(const char *),			*gethostbyaddr(const void *, int, int),			*gethostent(void);extern struct netent	*getnetbyname(const char *),			*getnetbyaddr(long, int),			*getnetent(void);extern struct servent	*getservbyname(const char *, const char *),			*getservbyport(int, const char *),			*getservent(void);extern struct protoent	*getprotobyname(const char *),			*getprotobynumber(int),			*getprotoent(void);extern struct rpcent	*getrpcbyname(const char *), 			*getrpcbynumber(int), 			*getrpcent(void);extern void sethostent(int),  endhostent(void),	    setnetent(int),   endnetent(void),	    setservent(int),  endservent(void),	    setprotoent(int), endprotoent(void),	    setrpcent(int),   endrpcent(void); /* * Error return codes from gethostbyname() and gethostbyaddr() * (left in extern int h_errno). */extern int h_errno;extern void herror(const char *);extern char *hstrerror(int); #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 */ #define __HOST_SVC_NOT_AVAIL 99		/* libc internal use only */ #ifdef __cplusplus}#endif #endif /* !__NETDB_H__ */