TCP_TIME
#define TCP_PAWS_IDLE TCP_TIME(24 * 24 * 60 * 60)
rttmin = min(max(tp->t_rttmin, rtt + 2 * (TCP_TIME(1) / hz)),
int tcp_keepinit_sec = TCPTV_KEEPINIT / TCP_TIME(1);
int tcp_keepidle_sec = TCPTV_KEEPIDLE / TCP_TIME(1);
int tcp_keepintvl_sec = TCPTV_KEEPINTVL / TCP_TIME(1);
#define TCPTV_MIN TCP_TIME(1) /* minimum allowable value */
#define TCPTV_REXMTMAX TCP_TIME(64) /* max allowable REXMT value */
#define TCPTV_MSL TCP_TIME(30) /* max seg lifetime (hah!) */
#define TCPTV_SRTTDFLT TCP_TIME(3) /* assumed RTT if no info */
#define TCPTV_PERSMIN TCP_TIME(5) /* retransmit persistence */
#define TCPTV_PERSMAX TCP_TIME(60) /* maximum persist interval */
#define TCPTV_KEEPINIT TCP_TIME(75) /* initial connect keep alive */
#define TCPTV_KEEPIDLE TCP_TIME(120*60) /* dflt time before probing */
#define TCPTV_KEEPINTVL TCP_TIME(75) /* default probe interval */
atomic_load_int(&tcp_keepinit_sec) * TCP_TIME(1));
atomic_load_int(&tcp_keepidle_sec) * TCP_TIME(1));
atomic_load_int(&tcp_keepintvl_sec) * TCP_TIME(1));
3 * TCPTV_KEEPINIT / TCP_TIME(1) },
5 * TCPTV_KEEPIDLE / TCP_TIME(1) },
3 * TCPTV_KEEPINTVL / TCP_TIME(1) },