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Edit File : SSL_SESSION_free.3 \| Size : 7.24 KB
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .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. \(C+ will .\" give a nicer C++. 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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_SESSION_new, SSL_SESSION_dup, SSL_SESSION_up_ref, SSL_SESSION_free \- create, free and manage SSL_SESSION structures .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ssl.h> \& \& SSL_SESSION SSL_SESSION_new(void); \& SSL_SESSION SSL_SESSION_dup(SSL_SESSION src); \& int SSL_SESSION_up_ref(SSL_SESSION ses); \& void SSL_SESSION_free(SSL_SESSION session); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSSL_SESSION_new()\fR creates a new \s-1SSL_SESSION\s0 structure and returns a pointer to it. .PP \&\fBSSL_SESSION_dup()\fR copies the contents of the \s-1SSL_SESSION\s0 structure in \fBsrc\fR and returns a pointer to it. .PP \&\fBSSL_SESSION_up_ref()\fR increments the reference count on the given \s-1SSL_SESSION\s0 structure. .PP \&\fBSSL_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. If \fBsession\fR is \s-1NULL\s0 nothing is done. .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 \&\fBSSL_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 \&\fBSSL_CTX_flush_sessions\fR\\|(3) operation. .PP \&\fBSSL_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 \fBSSL_get1_session()\fR, see \fBSSL_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 \fBd2i_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" SSL_SESSION_new returns a pointer to the newly allocated \s-1SSL_SESSION\s0 structure or \s-1NULL\s0 on error. .PP SSL_SESSION_up_ref returns 1 on success or 0 on error. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBssl\fR\\|(7), \fBSSL_get_session\fR\\|(3), \&\fBSSL_CTX_set_session_cache_mode\fR\\|(3), \&\fBSSL_CTX_flush_sessions\fR\\|(3), \&\fBd2i_SSL_SESSION\fR\\|(3) .SH "HISTORY" .IX Header "HISTORY" The \fBSSL_SESSION_dup()\fR function was added in OpenSSL 1.1.1. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \(L"License\(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>. Back

Edit File : SSL_SESSION_free.3 | Size : 7.24 KB

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.\" ========================================================================
.\"
.IX Title "SSL_SESSION_FREE 3"
.TH SSL_SESSION_FREE 3 "2023-09-11" "1.1.1w" "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_new, SSL_SESSION_dup, SSL_SESSION_up_ref, SSL_SESSION_free \- create, free and manage SSL_SESSION structures
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& SSL_SESSION *SSL_SESSION_new(void);
\& SSL_SESSION *SSL_SESSION_dup(SSL_SESSION *src);
\& int SSL_SESSION_up_ref(SSL_SESSION *ses);
\& void SSL_SESSION_free(SSL_SESSION *session);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_SESSION_new()\fR creates a new \s-1SSL_SESSION\s0 structure and returns a pointer to
it.
.PP
\&\fBSSL_SESSION_dup()\fR copies the contents of the \s-1SSL_SESSION\s0 structure in \fBsrc\fR
and returns a pointer to it.
.PP
\&\fBSSL_SESSION_up_ref()\fR increments the reference count on the given \s-1SSL_SESSION\s0
structure.
.PP
\&\fBSSL_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.
If \fBsession\fR is \s-1NULL\s0 nothing is done.
.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
\&\fBSSL_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
\&\fBSSL_CTX_flush_sessions\fR\|(3) operation.
.PP
\&\fBSSL_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 \fBSSL_get1_session()\fR, see \fBSSL_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 \fBd2i_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"
SSL_SESSION_new returns a pointer to the newly allocated \s-1SSL_SESSION\s0 structure
or \s-1NULL\s0 on error.
.PP
SSL_SESSION_up_ref returns 1 on success or 0 on error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(7), \fBSSL_get_session\fR\|(3),
\&\fBSSL_CTX_set_session_cache_mode\fR\|(3),
\&\fBSSL_CTX_flush_sessions\fR\|(3),
\&\fBd2i_SSL_SESSION\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The \fBSSL_SESSION_dup()\fR function was added in OpenSSL 1.1.1.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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