def handle_unbind(self, P):
"""
Used by the server to handle the incoming unbind request
"""
if self.state in [SessionState.BOUND_TX, SessionState.BOUND_RX, SessionState.BOUND_TRX]:
self.state = SessionState.UNBOUND
R = UnBindResp()
R.sequence_number = Integer(P.sequence_number.value, 4)
data = R.encode()
self.socket.send(data)
