SSL_session_reused - query whether a reused session was negotiated during handshake

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3.5.0                                              2025-06-04                           SSL_SESSION_REUSED(3SSL)

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

       SSL_session_reused - query whether a reused session was negotiated during 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(7), SSL_set_session(3), SSL_CTX_set_session_cache_mode(3)

        #include <openssl/ssl.h>

        int SSL_session_reused(const SSL *ssl);