uschar, uschar *, uschar **);
extern void invert_address(uschar *, uschar *);
-extern BOOL internal_transport_write_message(transport_ctx *, int);
extern int ip_addr(void *, int, const uschar *, int);
extern int ip_bind(int, int, uschar *, int);
extern int ip_connect(int, int, const uschar *, int, int, BOOL);