+ rv = nat44_ed_add_interface_address (sw_if_index, twice_nat);
+ if (rv)
+ {
+ error = clib_error_return (0, "add address returned %d", rv);
+ }
+ }
+ else
+ {
+ rv = nat44_ed_del_interface_address (sw_if_index, twice_nat);
+ if (rv)
+ {
+ error = clib_error_return (0, "del address returned %d", rv);
+ }