過程

Client Hello

Server Hello

Certificate, Server Key Exchange, Server Hello Done

Client Key Exchange, Change Cipher Spec, Finished

Change Cipher Spec, Finished

SSL segment of a reassembled PDU
...
SSL segment of a reassembled PDU
...
Application Data

close_notify (Client --> Server)

TLSv1.2 Record Layer: Alert (Level: Warning, Description: Close Notify)

alert is the normal way to stop a TLS session which should be done before closing the underlying TCP connection.
See also RFC 5246 7.2.1 Closure Alerts.