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+.\"
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+.\" ======================================================================
+.\"
+.IX Title "SSL_SESSION_FREE 1"
+.TH SSL_SESSION_FREE 1 "perl v5.6.1" "2002-01-27" "User Contributed Perl Documentation"
+.UC
+.SH "NAME"
+SSL_SESSION_free \- free an allocated \s-1SSL_SESSION\s0 structure
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/ssl.h>
+.Ve
+.Vb 1
+\& void SSL_SESSION_free(SSL_SESSION *session);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fISSL_SESSION_free()\fR decrements the reference count of \fBsession\fR and removes
+the \fB\s-1SSL_SESSION\s0\fR structure pointed to by \fBsession\fR and frees up the allocated
+memory, if the the reference count has reached 0.
+.SH "NOTES"
+.IX Header "NOTES"
+\&\s-1SSL_SESSION\s0 objects are allocated, when a \s-1TLS/SSL\s0 handshake operation
+is successfully completed. Depending on the settings, see
+SSL_CTX_set_session_cache_mode(3),
+the \s-1SSL_SESSION\s0 objects are internally referenced by the \s-1SSL_CTX\s0 and
+linked into its session cache. \s-1SSL\s0 objects may be using the \s-1SSL_SESSION\s0 object;
+as a session may be reused, several \s-1SSL\s0 objects may be using one \s-1SSL_SESSION\s0
+object at the same time. It is therefore crucial to keep the reference
+count (usage information) correct and not delete a \s-1SSL_SESSION\s0 object
+that is still used, as this may lead to program failures due to
+dangling pointers. These failures may also appear delayed, e.g.
+when an \s-1SSL_SESSION\s0 object was completely freed as the reference count
+incorrectly became 0, but it is still referenced in the internal
+session cache and the cache list is processed during a
+SSL_CTX_flush_sessions(3) operation.
+.PP
+\&\fISSL_SESSION_free()\fR must only be called for \s-1SSL_SESSION\s0 objects, for
+which the reference count was explicitly incremented (e.g.
+by calling \fISSL_get1_session()\fR, see SSL_get_session(3))
+or when the \s-1SSL_SESSION\s0 object was generated outside a \s-1TLS\s0 handshake
+operation, e.g. by using d2i_SSL_SESSION(3).
+It must not be called on other \s-1SSL_SESSION\s0 objects, as this would cause
+incorrect reference counts and therefore program failures.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fISSL_SESSION_free()\fR does not provide diagnostic information.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+ssl(3), SSL_get_session(3),
+SSL_CTX_set_session_cache_mode(3),
+SSL_CTX_flush_sessions(3),
+ d2i_SSL_SESSION(3)