taglinefilesource code
keepopen582net/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,
keepopen801net/inet/tcp.cif(sk->keepopen)
keepopen916net/inet/tcp.cif (sk->keepopen) 
keepopen2170net/inet/tcp.csk->keepopen = 1;
keepopen2522net/inet/tcp.cif (sk->keepopen) 
keepopen2814net/inet/tcp.csk->state != TCP_TIME_WAIT && !sk->keepopen) 
keepopen2818net/inet/tcp.cif (sk->keepopen)
keepopen2825net/inet/tcp.cif (sk->state != (unsigned char) sk->keepopen) 
keepopen109net/inet/timer.celse if (sk->keepopen)