Class UUIDField

scapy/fields.py:3766–3909

Field for UUID storage, wrapping Python's uuid.UUID type. The internal storage format of this field is ``uuid.UUID`` from the Python standard library. There are three formats (``uuid_fmt``) for this field type: * ``FORMAT_BE`` (default): the UUID is six fields in big-endian byte o

class UUIDField(Field[UUID, bytes]):
    """Field for UUID storage, wrapping Python's uuid.UUID type.

    The internal storage format of this field is ``uuid.UUID`` from the Python
    standard library.

    There are three formats (``uuid_fmt``) for this field type:

    * ``FORMAT_BE`` (default): the UUID is six fields in big-endian byte order,
      per RFC 4122.

      This format is used by DHCPv6 (RFC 6355) and most network protocols.

    * ``FORMAT_LE``: the UUID is six fields, with ``time_low``, ``time_mid``
      and ``time_high_version`` in little-endian byte order. This *doesn't*
      change the arrangement of the fields from RFC 4122.

      This format is used by Microsoft's COM/OLE libraries.

    * ``FORMAT_REV``: the UUID is a single 128-bit integer in little-endian
      byte order. This *changes the arrangement* of the fields.

      This format is used by Bluetooth Low Energy.

    Note: You should use the constants here.

    The "human encoding" of this field supports a number of different input
    formats, and wraps Python's ``uuid.UUID`` library appropriately:

    * Given a bytearray, bytes or str of 16 bytes, this class decodes UUIDs in
      wire format.

    * Given a bytearray, bytes or str of other lengths, this delegates to
      ``uuid.UUID`` the Python standard library. This supports a number of
      different encoding options -- see the Python standard library
      documentation for more details.

    * Given an int or long, presumed to be a 128-bit integer to pass to
      ``uuid.UUID``.

    * Given a tuple:

      * Tuples of 11 integers are treated as having the last 6 integers forming
        the ``node`` field, and are merged before being passed as a tuple of 6
        integers to ``uuid.UUID``.

      * Otherwise, the tuple is passed as the ``fields`` parameter to
        ``uuid.UUID`` directly without modification.

        ``uuid.UUID`` expects a tuple of 6 integers.

    Other types (such as ``uuid.UUID``) are passed through.
    """

    __slots__ = ["uuid_fmt"]

    FORMAT_BE = 0
    FORMAT_LE = 1