kytos / python-openflow

                                                         err)

            raise exceptions.PackException(msg)

    def unpack(self, buff, offset=0):

        """Unpack a binary message into this object's attributes.

        Unpack the binary value *buff* and update this object attributes based

        on the results.

        Args:

            buff (bytes): Binary data package to be unpacked.

            offset (int): Where to begin unpacking.

        Raises:

            Exception: If there is a struct unpacking error.

        """

        def _int2hex(number):

            return "{0:0{1}x}".format(number, 2)

        try:

            unpacked_data = struct.unpack('!6B', buff[offset:offset+6])

        except struct.error as exception:

            raise exceptions.UnpackException('%s; %s: %s' % (exception,

                                                             offset, buff))

        transformed_data = ':'.join([_int2hex(x) for x in unpacked_data])

        self._value = transformed_data

    def get_size(self, value=None):

        """Return the address size in bytes.

                                                         err)

            raise exceptions.PackException(msg)

    def unpack(self, buff, offset=0):

        """Unpack a binary message into this object's attributes.

        Unpack the binary value *buff* and update this object attributes based

        on the results.

        Args:

            buff (bytes): Binary data package to be unpacked.

            offset (int): Where to begin unpacking.

        Raises:

            Exception: If there is a struct unpacking error.

        """

        def _int2hex(number):

            return "{0:0{1}x}".format(number, 4)

        try:

            unpacked_data = struct.unpack('!8H', buff[offset:offset+16])

        except struct.error as exception:

            raise exceptions.UnpackException('%s; %s: %s' % (exception,

                                                             offset, buff))

        transformed_data = ':'.join([_int2hex(x) for x in unpacked_data])

        self._value = transformed_data

    def get_size(self, value=None):

        """Return the IPv6 address size in bytes.