+int nfs_lookup(const char *hostname, const sa_family_t family,
+ struct sockaddr *sap, socklen_t *salen);
+int nfs_string_to_sockaddr(const char *, struct sockaddr *, socklen_t *);
+int nfs_present_sockaddr(const struct sockaddr *,
+ const socklen_t, char *, const size_t);
+int nfs_callback_address(const struct sockaddr *, const socklen_t,
+ struct sockaddr *, socklen_t *);