SSL_clear man page on Oracle

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SSL_clear(3)			    OpenSSL			  SSL_clear(3)

       SSL_clear - reset SSL object to allow another connection

	#include <openssl/ssl.h>

	int SSL_clear(SSL *ssl);

       Reset ssl to allow another connection. All settings (method, ciphers,
       BIOs) are kept.

       SSL_clear is used to prepare an SSL object for a new connection. While
       all settings are kept, a side effect is the handling of the current SSL
       session.	 If a session is still open, it is considered bad and will be
       removed from the session cache, as required by RFC2246. A session is
       considered open, if SSL_shutdown(3) was not called for the connection
       or at least SSL_set_shutdown(3) was used to set the SSL_SENT_SHUTDOWN

       If a session was closed cleanly, the session object will be kept and
       all settings corresponding. This explicitly means, that e.g. the
       special method used during the session will be kept for the next
       handshake. So if the session was a TLSv1 session, a SSL client object
       will use a TLSv1 client method for the next handshake and a SSL server
       object will use a TLSv1 server method, even if SSLv23_*_methods were
       chosen on startup. This will might lead to connection failures (see
       SSL_new(3)) for a description of the method's properties.

       SSL_clear() resets the SSL object to allow for another connection. The
       reset operation however keeps several settings of the last sessions
       (some of these settings were made automatically during the last
       handshake). It only makes sense for a new connection with the exact
       same peer that shares these settings, and may fail if that peer changes
       its settings between connections. Use the sequence SSL_get_session(3);
       SSL_new(3); SSL_set_session(3); SSL_free(3) instead to avoid such
       failures (or simply SSL_free(3); SSL_new(3) if session reuse is not

       The following return values can occur:

       0   The SSL_clear() operation could not be performed. Check the error
	   stack to find out the reason.

       1   The SSL_clear() operation was successful.

       SSL_new(3), SSL_free(3), SSL_shutdown(3), SSL_set_shutdown(3),
       SSL_CTX_set_options(3), ssl(3), SSL_CTX_set_client_cert_cb(3)

1.0.1e				  2014-05-08			  SSL_clear(3)

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