TCP_HAS_WINDOW_SCALE
if (segment.options & TCP_HAS_WINDOW_SCALE) {
segment.options |= TCP_HAS_WINDOW_SCALE;
segment.options &= ~TCP_HAS_WINDOW_SCALE;
if ((segment.options & TCP_HAS_WINDOW_SCALE) != 0
segment.options |= TCP_HAS_WINDOW_SCALE;
if ((segment.options & TCP_HAS_WINDOW_SCALE) != 0)