+extern struct servent *getservbyname(const char *name, const char *proto);
+extern struct servent *getservbyport(int port, const char *proto);
+
+extern struct hostent *gethostbyname(const char *name);
+extern struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type);
+
+extern void setservent(int stayopen);
+extern struct servent *getservent(void);
+extern void enservent(void);
+
+#ifdef __cplusplus
+}
+#endif