Symbol: TF_KEEPALIVE
sys/netinet/tcp_input.c
3400
tp->t_flags |= TF_KEEPALIVE;
sys/netinet/tcp_input.c
3405
tp->t_flags &= ~TF_KEEPALIVE;
sys/netinet/tcp_timer.c
332
if ((always_keepalive || (tp->t_flags & TF_KEEPALIVE) ||