TCP_METRIC_RTT
val |= 1 << TCP_METRIC_RTT;
tcp_metric_set(tm, TCP_METRIC_RTT, msval * USEC_PER_MSEC);
if (tm && !tcp_metric_locked(tm, TCP_METRIC_RTT))
tcp_metric_set(tm, TCP_METRIC_RTT, 0);
rtt = tcp_metric_get(tm, TCP_METRIC_RTT);
if (!tcp_metric_locked(tm, TCP_METRIC_RTT)) {
tcp_metric_set(tm, TCP_METRIC_RTT, rtt);
crtt = tcp_metric_get(tm, TCP_METRIC_RTT);
if (tm && tcp_metric_get(tm, TCP_METRIC_RTT))
if (i == TCP_METRIC_RTT) {