183 lines
5.7 KiB
Groff
183 lines
5.7 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "SSL_CTX_set_timeout 3"
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.TH SSL_CTX_set_timeout 3 "2013-02-11" "1.0.1e" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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SSL_CTX_set_timeout, SSL_CTX_get_timeout \- manipulate timeout values for session caching
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/ssl.h>
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\&
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\& long SSL_CTX_set_timeout(SSL_CTX *ctx, long t);
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\& long SSL_CTX_get_timeout(SSL_CTX *ctx);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fISSL_CTX_set_timeout()\fR sets the timeout for newly created sessions for
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\&\fBctx\fR to \fBt\fR. The timeout value \fBt\fR must be given in seconds.
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.PP
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\&\fISSL_CTX_get_timeout()\fR returns the currently set timeout value for \fBctx\fR.
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.SH "NOTES"
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.IX Header "NOTES"
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Whenever a new session is created, it is assigned a maximum lifetime. This
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lifetime is specified by storing the creation time of the session and the
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timeout value valid at this time. If the actual time is later than creation
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time plus timeout, the session is not reused.
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.PP
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Due to this realization, all sessions behave according to the timeout value
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valid at the time of the session negotiation. Changes of the timeout value
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do not affect already established sessions.
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.PP
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The expiration time of a single session can be modified using the
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\&\fISSL_SESSION_get_time\fR\|(3) family of functions.
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.PP
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Expired sessions are removed from the internal session cache, whenever
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\&\fISSL_CTX_flush_sessions\fR\|(3) is called, either
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directly by the application or automatically (see
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\&\fISSL_CTX_set_session_cache_mode\fR\|(3))
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.PP
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The default value for session timeout is decided on a per protocol
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basis, see \fISSL_get_default_timeout\fR\|(3).
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All currently supported protocols have the same default timeout value
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of 300 seconds.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fISSL_CTX_set_timeout()\fR returns the previously set timeout value.
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.PP
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\&\fISSL_CTX_get_timeout()\fR returns the currently set timeout value.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIssl\fR\|(3),
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\&\fISSL_CTX_set_session_cache_mode\fR\|(3),
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\&\fISSL_SESSION_get_time\fR\|(3),
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\&\fISSL_CTX_flush_sessions\fR\|(3),
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\&\fISSL_get_default_timeout\fR\|(3)
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