Function windivert_sys::WinDivertHelperCompileFilter

pub unsafe extern "C" fn WinDivertHelperCompileFilter(
    filter: *const c_char,
    layer: WinDivertLayer,
    object: *mut c_char,
    objLen: u32,
    errorStr: *mut *const c_char,
    errorPos: *mut u32
) -> BOOL

Check the official docs