| Current File : //usr/share/man/man3openssl/SSL_SESSION_free.3openssl |
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.\" ========================================================================
.\"
.IX Title "SSL_SESSION_free 3openssl"
.TH SSL_SESSION_free 3openssl "2016-05-03" "1.0.1t" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
SSL_SESSION_free \- free an allocated SSL_SESSION structure
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& 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 reference count has reached 0.
.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
=
Availability library/security/openssl
=
Stability Uncommitted
.TE
.PP
.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
\&\fISSL_CTX_set_session_cache_mode\fR\|(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
\&\fISSL_CTX_flush_sessions\fR\|(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 \fISSL_get_session\fR\|(3))
or when the \s-1SSL_SESSION\s0 object was generated outside a \s-1TLS\s0 handshake
operation, e.g. by using \fId2i_SSL_SESSION\fR\|(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"
\&\fIssl\fR\|(3), \fISSL_get_session\fR\|(3),
\&\fISSL_CTX_set_session_cache_mode\fR\|(3),
\&\fISSL_CTX_flush_sessions\fR\|(3),
\fId2i_SSL_SESSION\fR\|(3)
.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland. The original community source was downloaded from http://www.openssl.org/source/openssl-1.0.1t.tar.gz
Further information about this software can be found on the open source community website at http://www.openssl.org/.