Disconnect-reconnect with w5x00_tcp_client_over_ssl

TCP/IP Chip W5500
1

Hi,
I need to connect the w5500 always with the same server and I send it a post request.
When I run the code I notice this:
If I send multiple requests with time intervals < 5 sec the server responds and the socket satus is in SOCK_ESTABLISHED if the time interval is > 5 sec the socket status is SOCK_CLOSE_WAIT.
My question is:

  1. Can I avoid the SOCK_CLOSE_WAIT?
    2)If I can’t avoid this, How can I disconnect and reconnect using the same port 443?
    I do:
    disconnect(sock_num)
    socket(sock_num,Sn_MR_TCP, 443,SF_TCP_NODELAY );
    connect(sock_num, target_ip,443);
    but I can’t reconnect.
  2. The code takes a long time to execute:
    mbedtls_ssl_handshake
    in the state: MBEDTLS_SSL_CLIENT_KEY_EXCHANGE
    If I need to connect at the same server can I do the mbedtls_ssl_handshake only the first one? How can I do thies?
    Thanks in advance.