SSL_get_default_timeout - get default session timeout value

       Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except in compliance
       with the License.  You can obtain a copy in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.

3.5.0                                              2025-06-04                      SSL_GET_DEFAULT_TIMEOUT(3SSL)

SSL_get_default_timeout() returns the default timeout value assigned to SSL_SESSION objects negotiated
       for the protocol valid for ssl.

       SSL_get_default_timeout - get default session timeout value

       Whenever a new session is negotiated, it is assigned a timeout value, after which it will not be accepted
       for session reuse. If the timeout value was not explicitly set using SSL_CTX_set_timeout(3), the
       hardcoded default timeout for the protocol will be used.

       SSL_get_default_timeout() return this hardcoded value, which is 300 seconds for all currently supported
       protocols.

       See description.

ssl(7), SSL_CTX_set_session_cache_mode(3), SSL_SESSION_get_time(3), SSL_CTX_flush_sessions(3),
       SSL_get_default_timeout(3)

        #include <openssl/ssl.h>

        long SSL_get_default_timeout(const SSL *ssl);