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files >> //proc/self/root/opt/cpanel/ea-openssl/etc/pki/tls/man/man3/SSL_get_session.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SSL_get_session \- retrieve TLS/SSL session data .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ssl.h> \& \& SSL_SESSION *SSL_get_session(const SSL *ssl); \& SSL_SESSION *SSL_get0_session(const SSL *ssl); \& SSL_SESSION *SSL_get1_session(SSL *ssl); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSSL_get_session()\fR returns a pointer to the \fB\s-1SSL_SESSION\s0\fR actually used in \&\fBssl\fR. The reference count of the \fB\s-1SSL_SESSION\s0\fR is not incremented, so that the pointer can become invalid by other operations. .PP \&\fBSSL_get0_session()\fR is the same as \fBSSL_get_session()\fR. .PP \&\fBSSL_get1_session()\fR is the same as \fBSSL_get_session()\fR, but the reference count of the \fB\s-1SSL_SESSION\s0\fR is incremented by one. .SH "NOTES" .IX Header "NOTES" The ssl session contains all information required to re-establish the connection without a new handshake. .PP A session will be automatically removed from the session cache and marked as non-resumable if the connection is not closed down cleanly, e.g. if a fatal error occurs on the connection or \fBSSL_shutdown\fR\|(3) is not called prior to \&\fBSSL_free\fR\|(3). .PP \&\fBSSL_get0_session()\fR returns a pointer to the actual session. As the reference counter is not incremented, the pointer is only valid while the connection is in use. If \fBSSL_clear\fR\|(3) or \&\fBSSL_free\fR\|(3) is called, the session may be removed completely (if considered bad), and the pointer obtained will become invalid. Even if the session is valid, it can be removed at any time due to timeout during \fBSSL_CTX_flush_sessions\fR\|(3). .PP If the data is to be kept, \fBSSL_get1_session()\fR will increment the reference count, so that the session will not be implicitly removed by other operations but stays in memory. In order to remove the session \&\fBSSL_SESSION_free\fR\|(3) must be explicitly called once to decrement the reference count again. .PP \&\s-1SSL_SESSION\s0 objects keep internal link information about the session cache list, when being inserted into one \s-1SSL_CTX\s0 object's session cache. One \s-1SSL_SESSION\s0 object, regardless of its reference count, must therefore only be used with one \s-1SSL_CTX\s0 object (and the \s-1SSL\s0 objects created from this \s-1SSL_CTX\s0 object). .SH "RETURN VALUES" .IX Header "RETURN VALUES" The following return values can occur: .IP "\s-1NULL\s0" 4 .IX Item "NULL" There is no session available in \fBssl\fR. .IP "Pointer to an \s-1SSL\s0" 4 .IX Item "Pointer to an SSL" The return value points to the data of an \s-1SSL\s0 session. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBssl\fR\|(3), \fBSSL_free\fR\|(3), \&\fBSSL_clear\fR\|(3), \&\fBSSL_SESSION_free\fR\|(3)
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