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