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Diffstat (limited to 'secure/lib/libcrypto/man/SSL_CTX_sess_set_get_cb.3')
-rw-r--r-- | secure/lib/libcrypto/man/SSL_CTX_sess_set_get_cb.3 | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/SSL_CTX_sess_set_get_cb.3 b/secure/lib/libcrypto/man/SSL_CTX_sess_set_get_cb.3 new file mode 100644 index 0000000..a253ab6 --- /dev/null +++ b/secure/lib/libcrypto/man/SSL_CTX_sess_set_get_cb.3 @@ -0,0 +1,223 @@ +.\" Automatically generated by Pod::Man version 1.15 +.\" Thu May 9 13:20:10 2002 +.\" +.\" Standard preamble: +.\" ====================================================================== +.de Sh \" Subsection heading +.br +.if t .Sp +.ne 5 +.PP +\fB\\$1\fR +.PP +.. +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Ip \" List item +.br +.ie \\n(.$>=3 .ne \\$3 +.el .ne 3 +.IP "\\$1" \\$2 +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R + +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. | will give a +.\" real vertical bar. \*(C+ will give a nicer C++. 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If a callback function has not been set, +the \s-1NULL\s0 pointer is returned. +.SH "NOTES" +.IX Header "NOTES" +In order to allow external session caching, synchronization with the internal +session cache is realized via callback functions. Inside these callback +functions, session can be saved to disk or put into a database using the +d2i_SSL_SESSION(3) interface. +.PP +The \fInew_session_cb()\fR is called, whenever a new session has been negotiated +and session caching is enabled (see +SSL_CTX_set_session_cache_mode(3)). +The \fInew_session_cb()\fR is passed the \fBssl\fR connection and the ssl session +\&\fBsess\fR. If the callback returns \fB0\fR, the session will be immediately +removed again. +.PP +The \fIremove_session_cb()\fR is called, whenever the \s-1SSL\s0 engine removes a session +from the internal cache. This happens if the session is removed because +it is expired or when a connection was not shutdown cleanly. The +\&\fIremove_session_cb()\fR is passed the \fBctx\fR and the ssl session \fBsess\fR. +It does not provide any feedback. +.PP +The \fIget_session_cb()\fR is only called on \s-1SSL/TLS\s0 servers with the session id +proposed by the client. The \fIget_session_cb()\fR is always called, also when +session caching was disabled. The \fIget_session_cb()\fR is passed the +\&\fBssl\fR connection, the session id of length \fBlength\fR at the memory location +\&\fBdata\fR. With the parameter \fBcopy\fR the callback can require the +\&\s-1SSL\s0 engine to increment the reference count of the \s-1SSL_SESSION\s0 object, +Normally the reference count is not incremented and therefore the +session must not be explicitly freed with +SSL_SESSION_free(3). +.SH "SEE ALSO" +.IX Header "SEE ALSO" +ssl(3), d2i_SSL_SESSION(3), +SSL_CTX_set_session_cache_mode(3), +SSL_CTX_flush_sessions(3), +SSL_SESSION_free(3) |