def sanitize(self):
        '''
        Check if the current settings conform to the LISP specifications and
        fix them where possible.
        '''
        super(EncapsulatedControlMessage, self).sanitize()

        # S: This is the Security bit.  When set to 1 the following
        # authentication information will be appended to the end of the Map-
        # Reply.  The detailed format of the Authentication Data Content is
        # for further study.
        if not isinstance(self.security, bool):
            raise ValueError('Security flag must be a boolean')

        if self.security:
            raise NotImplementedError('Handling security data is not ' +
                                      'implemented yet')

        # "D" is the "DDT-originated" flag and is set by a DDT client to
        # indicate that the receiver can and should return Map-Referral
        # messages as appropriate.
        if not isinstance(self.ddt_originated, bool):
            raise ValueError('DDT originated flag must be a boolean')

        # The 6th bit in the ECM LISP header is allocated as the "R"
        # bit.  The R bit indicates that the encapsulated Map-Register is
        # to be processed by an RTR.
        if not isinstance(self.for_rtr, bool):
            raise ValueError('For-RTR flag must be a boolean')

        # The 7th bit in the ECM header is allocated as the "N" bit.  The
        # N bit indicates that this Map-Register is being relayed by an
        # RTR.  When an RTR relays the ECM-ed Map-Register to a Map-Server,
        # the N bit must be set to 1.
        if not isinstance(self.relayed_by_rtr, bool):
            raise ValueError('Relayed-by-RTR flag must be a boolean')