SSL_session_reused

 #include <openssl/ssl.h>
 int SSL_session_reused(SSL *ssl);

Query, whether a reused session was negotiated during the handshake.

During the negotiation, a client can propose to reuse a session. The server then looks up the session in its cache. If both client and server agree on the session, it will be reused and a flag is being set that can be queried by the application.

The following return values can occur:

0

A new session was negotiated.

1

A session was reused.

ssl(3), SSL_set_session(3), SSL_CTX_set_session_cache_mode(3)