Defines the authority bits in the default label associated with
a not-yet-labelled outbound datagram. This is a bit map. 'NONE' means
that a 3-byte option label (no authority byte) is used. This field only
has meaning if default labelling is enabled (wfIpInterfaceDefaultLabelEnabled =
IP_NWIF_LABEL_ENABLED).
The octets indicate auth values. Authorities have been defined
for the first octet. This is represented by the following 'bit mask'
values:
IP_NWIF_AUTH_NONE 0 (0x00)
IP_NWIF_AUTH_GENSER 128 (0x80)
IP_NWIF_AUTH_SIOPESI 64 (0x40)
IP_NWIF_AUTH_SCI 32 (0x20)
IP_NWIF_AUTH_NSA 16 (0x10)
IP_NWIF_AUTH_DOE 8 (0x08)
IP_NWIF_AUTH_ALL 248 (0xF8)
If no value is specified and default labelling is enabled,
the software defaults to IP_NWIF_AUTH_NONE.