Section: OpenSSL (3)
SSL_SESSION_new, SSL_SESSION_dup, SSL_SESSION_up_ref, SSL_SESSION_free - create, free and manage SSL_SESSION structures
SSL_SESSION *SSL_SESSION_dup(SSL_SESSION *src);
int SSL_SESSION_up_ref(SSL_SESSION *ses);
void SSL_SESSION_free(SSL_SESSION *session);
creates a new SSL_SESSION
structure and returns a pointer to
SSL_SESSION_dup() copies the contents of the SSL_SESSION structure in src
and returns a pointer to it.
SSL_SESSION_up_ref() increments the reference count on the given SSL_SESSION
SSL_SESSION_free() decrements the reference count of session and removes
the SSL_SESSION structure pointed to by session and frees up the allocated
memory, if the reference count has reached 0.
If session is NULL nothing is done.
objects are allocated, when a TLS/SSL
is successfully completed. Depending on the settings, see
objects are internally referenced by the SSL_CTX
linked into its session cache. SSL
objects may be using the SSL_SESSION
as a session may be reused, several SSL
objects may be using one SSL_SESSION
object at the same time. It is therefore crucial to keep the reference
count (usage information) correct and not delete a SSL_SESSION
that is still used, as this may lead to program failures due to
dangling pointers. These failures may also appear delayed, e.g.
when an SSL_SESSION
object was completely freed as the reference count
incorrectly became 0, but it is still referenced in the internal
session cache and the cache list is processed during a
SSL_SESSION_free() must only be called for SSL_SESSION objects, for
which the reference count was explicitly incremented (e.g.
by calling SSL_get1_session(), see SSL_get_session(3))
or when the SSL_SESSION object was generated outside a TLS handshake
operation, e.g. by using d2i_SSL_SESSION(3).
It must not be called on other SSL_SESSION objects, as this would cause
incorrect reference counts and therefore program failures.
SSL_SESSION_new returns a pointer to the newly allocated SSL_SESSION
SSL_SESSION_up_ref returns 1 on success or 0 on error.
function was added in OpenSSL 1.1.1.
Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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