x_control
ops.x_control = xdrmem_control;
ops.x_control = xdrrec_control;
ops.x_control = xdrstdio_control;
bool_t (*x_control)(struct XDR *, int, void *);
bool_t (*x_control)();
(*(xdrs)->x_ops->x_control)(xdrs, req, op)
(*(xdrs)->x_ops->x_control)(xdrs, req, op)
ops.x_control = xdrmem_control;
ops.x_control = (dummyfunc2)harmless;
ops.x_control = x_control;