taglinefilesource code
keepopen600net/inet/af_inet.csk->keepopen = 0;
keepopen181net/inet/sock.csk->keepopen = 1;
keepopen183net/inet/sock.csk->keepopen = 0;
keepopen264net/inet/sock.cval = sk->keepopen;
keepopen79net/inet/sock.hkeepopen,
keepopen857net/inet/tcp.cif(sk->keepopen) {
keepopen973net/inet/tcp.cif (sk->keepopen) 
keepopen2246net/inet/tcp.csk->keepopen = 1;
keepopen2545net/inet/tcp.cif (sk->keepopen) 
keepopen2875net/inet/tcp.c} else if (sk->keepopen) {
keepopen2884net/inet/tcp.csk->state != TCP_TIME_WAIT && !sk->keepopen) 
keepopen2888net/inet/tcp.cif (sk->keepopen) {
keepopen2896net/inet/tcp.cif (sk->state != (unsigned char) sk->keepopen)