The SSL connection has been closed. If the protocol version is SSL 3.0 or TLS 1.0, this result code is returned only if a closure alerts has occurred in the protocol, i.e. if the connection has been closed cleanly.
Details depend on the application.
The OpenSSL error queue may contain more information on the error. A failure in the SSL library occurred, usually a protocol error. The OpenSSL error queue contains more information on the error.