use n::packet::*;
extract_field!(extract_source, l4, 2, source);
fill_field!(fill_source, l4, 2, source);
extract_field_value!(extract_source_u16, l4, source, u16);
apply_field_value!(apply_source, l4, source, u16);
extract_field!(extract_destination, l4, 2, destination);
fill_field!(fill_destination, l4, 2, destination);
extract_field_value!(extract_destination_u16, l4, destination, u16);
apply_field_value!(apply_destination, l4, destination, u16);