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=pod

=head1 NAME

SSL_dup, SSL_new, SSL_up_ref - create an SSL structure for a connection

=head1 SYNOPSIS

 #include <openssl/ssl.h>

 SSL *SSL_dup(SSL *s);
 SSL *SSL_new(SSL_CTX *ctx);
 int SSL_up_ref(SSL *s);

=head1 DESCRIPTION

SSL_new() creates a new B<SSL> structure which is needed to hold the
data for a TLS/SSL connection. The new structure inherits the settings
of the underlying context B<ctx>: connection method,
options, verification settings, timeout settings. An B<SSL> structure is
reference counted. Creating an B<SSL> structure for the first time increments
the reference count. Freeing it (using SSL_free) decrements it. When the
reference count drops to zero, any memory or resources allocated to the B<SSL>
structure are freed.

SSL_up_ref() increments the reference count for an
existing B<SSL> structure.

SSL_dup() duplicates an existing B<SSL> structure into a new allocated one. All
settings are inherited from the original B<SSL> structure. Dynamic data (i.e.
existing connection details) are not copied, the new B<SSL> is set into an
initial accept (server) or connect (client) state.

=head1 RETURN VALUES

The following return values can occur:

=over 4

=item NULL

The creation of a new SSL structure failed. Check the error stack to
find out the reason.

=item Pointer to an SSL structure

The return value points to an allocated SSL structure.

SSL_up_ref() returns 1 for success and 0 for failure.

=back

=head1 SEE ALSO

L<SSL_free(3)>, L<SSL_clear(3)>,
L<SSL_CTX_set_options(3)>,
L<SSL_get_SSL_CTX(3)>,
L<ssl(7)>

=head1 COPYRIGHT

Copyright 2000-2017 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