Note if the connection was never opened, is still alive, or was closed
locally this value will be 0. If no close code was given by the remote
end in the close frame, the value will be 1005. If the connection was
not closed cleanly by the remote end, this value will be 1006.
Returns the close code sent by the remote end.
Note if the connection was never opened, is still alive, or was closed locally this value will be 0. If no close code was given by the remote end in the close frame, the value will be 1005. If the connection was not closed cleanly by the remote end, this value will be 1006.