#include <sys/types.h>#include <string.h>#include <unistd.h>#include <stdlib.h>#include <ctype.h>#include <net/netdb.h>#include <stdio.h>#include <errno.h>//#include <net/inet.h>#include <arpa/nameser.h>//#include <resolv.h>#include <net/if.h>extern void _sethtent(int f);extern void _endhtent(void);extern struct hostent *_gethtent(void);extern struct hostent *_gethtbyname(const char *name);extern struct hostent *_gethtbyaddr(const char *addr, int len,		 int type);extern int _validuser(FILE *hostf, const char *rhost,		 const char *luser, const char *ruser, int baselen);extern int _checkhost(const char *rhost, const char *lhost, int len);#if 0extern void putlong(u_long l, u_char *msgp);extern void putshort(u_short l, u_char *msgp);extern u_int32_t _getlong(register const u_char *msgp);extern u_int16_t _getshort(register const u_char *msgp);extern void p_query(char *msg);extern void fp_query(char *msg, FILE *file);extern char *p_cdname(char *cp, char *msg, FILE *file);extern char *p_rr(char *cp, char *msg, FILE *file);extern char *p_type(int type);extern char * p_class(int class);extern char *p_time(u_long value);#endifextern char * hostalias(const char *name);extern void sethostfile(char *name);extern void _res_close (void);extern void ruserpass(const char *host, char **aname, char **apass);