+extern char ftp_last_respline[];
+
+uerr_t ftp_response (int, char **);
+uerr_t ftp_login (int, const char *, const char *);
+uerr_t ftp_port (int, int *);
+uerr_t ftp_pasv (int, ip_address *, int *);
+#ifdef ENABLE_IPV6
+uerr_t ftp_lprt (int, int *);
+uerr_t ftp_lpsv (int, ip_address *, int *);
+uerr_t ftp_eprt (int, int *);
+uerr_t ftp_epsv (int, ip_address *, int *);
+#endif
+uerr_t ftp_type (int, int);
+uerr_t ftp_cwd (int, const char *);
+uerr_t ftp_retr (int, const char *);
+uerr_t ftp_rest (int, wgint);
+uerr_t ftp_list (int, const char *, enum stype);
+uerr_t ftp_syst (int, enum stype *);
+uerr_t ftp_pwd (int, char **);
+uerr_t ftp_size (int, const char *, wgint *);
+
+#ifdef ENABLE_OPIE
+const char *skey_response (int, const char *, const char *);
+#endif
+
+struct url;