How a Session is Ended

The client may initiate the graceful termination of a communication session. The client sends a CLOSE_REQ message, defined in CLOSE_REQ; the server responds with a CLOSE_CONF message, defined in CLOSE_CONF. On receipt of the CLOSE_CONF message, the client resets the TCP connection. The client should wait up to 5 seconds for the CLOSE_CONF message before resetting the connection.

Figure 1 depicts the session termination message flow.