1=pod
2
3=head1 NAME
4
5SSL_CTX_flush_sessions - remove expired sessions
6
7=head1 SYNOPSIS
8
9 #include <openssl/ssl.h>
10
11 void SSL_CTX_flush_sessions(SSL_CTX *ctx, long tm);
12
13=head1 DESCRIPTION
14
15SSL_CTX_flush_sessions() causes a run through the session cache of
16B<ctx> to remove sessions expired at time B<tm>.
17
18=head1 NOTES
19
20If enabled, the internal session cache will collect all sessions established
21up to the specified maximum number (see SSL_CTX_sess_set_cache_size()).
22As sessions will not be reused ones they are expired, they should be
23removed from the cache to save resources. This can either be done
24automatically whenever 255 new sessions were established (see
25L<SSL_CTX_set_session_cache_mode(3)>)
26or manually by calling SSL_CTX_flush_sessions().
27
28The parameter B<tm> specifies the time which should be used for the
29expiration test, in most cases the actual time given by time(0)
30will be used.
31
32SSL_CTX_flush_sessions() will only check sessions stored in the internal
33cache. When a session is found and removed, the remove_session_cb is however
34called to synchronize with the external cache (see
35L<SSL_CTX_sess_set_get_cb(3)>).
36
37=head1 RETURN VALUES
38
39SSL_CTX_flush_sessions() does not return a value.
40
41=head1 SEE ALSO
42
43L<ssl(7)>,
44L<SSL_CTX_set_session_cache_mode(3)>,
45L<SSL_CTX_set_timeout(3)>,
46L<SSL_CTX_sess_set_get_cb(3)>
47
48=head1 COPYRIGHT
49
50Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
51
52Licensed under the Apache License 2.0 (the "License").  You may not use
53this file except in compliance with the License.  You can obtain a copy
54in the file LICENSE in the source distribution or at
55L<https://www.openssl.org/source/license.html>.
56
57=cut
58