taglinefilesource code
keepopen569net/inet/af_inet.csk->keepopen = 0;
keepopen180net/inet/sock.csk->keepopen = 1;
keepopen182net/inet/sock.csk->keepopen = 0;
keepopen263net/inet/sock.cval = sk->keepopen;
keepopen79net/inet/sock.hkeepopen,
keepopen724net/inet/tcp.cif(sk->keepopen)
keepopen836net/inet/tcp.cif (sk->keepopen) 
keepopen2030net/inet/tcp.csk->keepopen = 1;
keepopen2345net/inet/tcp.cif (sk->keepopen) {
keepopen2582net/inet/tcp.csk->state != TCP_TIME_WAIT && !sk->keepopen) {
keepopen2585net/inet/tcp.cif (sk->keepopen)
keepopen2590net/inet/tcp.cif (sk->state != (unsigned char) sk->keepopen) {
keepopen109net/inet/timer.celse if (sk->keepopen)