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=pod
=head1 NAME
SSL_SESSION_get_protocol_version - retrieve session protocol version
=head1 SYNOPSIS
#include <openssl/ssl.h>
int SSL_SESSION_get_protocol_version(const SSL_SESSION *s);
=head1 DESCRIPTION
SSL_SESSION_get_protocol_version() returns the protocol version number used
by session B<s>.
=head1 RETURN VALUES
SSL_SESSION_get_protocol_version() returns a number indicating the protocol
version used for the session; this number matches the constants I<e.g.>
B<TLS1_VERSION> or B<TLS1_2_VERSION>.
Note that the SSL_SESSION_get_protocol_version() function
does B<not> perform a null check on the provided session B<s> pointer.
=head1 SEE ALSO
L<ssl(3)>
=head1 HISTORY
SSL_SESSION_get_protocol_version() was first added to OpenSSL 1.1.0
=head1 COPYRIGHT
Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut
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