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authorWojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>2021-04-30 00:33:56 +0200
committerWojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>2021-04-30 00:33:56 +0200
commitaa4d426b4d3527d7e166df1a05058c9a4a0f6683 (patch)
tree4ff17ce8b89a2321b9d0ed4bcfc37c447bcb6820 /openssl-1.1.0h/doc/ssl/SSL_CTX_set_timeout.pod
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+=pod
+
+=head1 NAME
+
+SSL_CTX_set_timeout, SSL_CTX_get_timeout - manipulate timeout values for session caching
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ long SSL_CTX_set_timeout(SSL_CTX *ctx, long t);
+ long SSL_CTX_get_timeout(SSL_CTX *ctx);
+
+=head1 DESCRIPTION
+
+SSL_CTX_set_timeout() sets the timeout for newly created sessions for
+B<ctx> to B<t>. The timeout value B<t> must be given in seconds.
+
+SSL_CTX_get_timeout() returns the currently set timeout value for B<ctx>.
+
+=head1 NOTES
+
+Whenever a new session is created, it is assigned a maximum lifetime. This
+lifetime is specified by storing the creation time of the session and the
+timeout value valid at this time. If the actual time is later than creation
+time plus timeout, the session is not reused.
+
+Due to this realization, all sessions behave according to the timeout value
+valid at the time of the session negotiation. Changes of the timeout value
+do not affect already established sessions.
+
+The expiration time of a single session can be modified using the
+L<SSL_SESSION_get_time(3)> family of functions.
+
+Expired sessions are removed from the internal session cache, whenever
+L<SSL_CTX_flush_sessions(3)> is called, either
+directly by the application or automatically (see
+L<SSL_CTX_set_session_cache_mode(3)>)
+
+The default value for session timeout is decided on a per protocol
+basis, see L<SSL_get_default_timeout(3)>.
+All currently supported protocols have the same default timeout value
+of 300 seconds.
+
+=head1 RETURN VALUES
+
+SSL_CTX_set_timeout() returns the previously set timeout value.
+
+SSL_CTX_get_timeout() returns the currently set timeout value.
+
+=head1 SEE ALSO
+
+L<ssl(3)>,
+L<SSL_CTX_set_session_cache_mode(3)>,
+L<SSL_SESSION_get_time(3)>,
+L<SSL_CTX_flush_sessions(3)>,
+L<SSL_get_default_timeout(3)>
+
+=head1 COPYRIGHT
+
+Copyright 2001-2016 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
+L<https://www.openssl.org/source/license.html>.
+
+=cut