=pod
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=head1 NAME
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SSL_set_session - set a TLS/SSL session to be used during TLS/SSL connect
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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int SSL_set_session(SSL *ssl, SSL_SESSION *session);
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=head1 DESCRIPTION
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SSL_set_session() sets B<session> to be used when the TLS/SSL connection
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is to be established. SSL_set_session() is only useful for TLS/SSL clients.
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When the session is set, the reference count of B<session> is incremented
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by 1. If the session is not reused, the reference count is decremented
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again during SSL_connect(). Whether the session was reused can be queried
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with the L<SSL_session_reused(3)> call.
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If there is already a session set inside B<ssl> (because it was set with
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SSL_set_session() before or because the same B<ssl> was already used for
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a connection), SSL_SESSION_free() will be called for that session. If that old
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session is still B<open>, it is considered bad and will be removed from the
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session cache (if used). A session is considered open, if L<SSL_shutdown(3)> was
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not called for the connection (or at least L<SSL_set_shutdown(3)> was used to
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set the SSL_SENT_SHUTDOWN state).
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=head1 NOTES
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SSL_SESSION objects keep internal link information about the session cache
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list, when being inserted into one SSL_CTX object's session cache.
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One SSL_SESSION object, regardless of its reference count, must therefore
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only be used with one SSL_CTX object (and the SSL objects created
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from this SSL_CTX object).
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=head1 RETURN VALUES
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The following return values can occur:
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=over 4
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=item Z<>0
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The operation failed; check the error stack to find out the reason.
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=item Z<>1
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The operation succeeded.
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=back
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=head1 SEE ALSO
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L<ssl(7)>, L<SSL_SESSION_free(3)>,
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L<SSL_get_session(3)>,
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L<SSL_session_reused(3)>,
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L<SSL_CTX_set_session_cache_mode(3)>
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=head1 COPYRIGHT
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Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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