Description: An octet string representing the concatenation of
VINES IP header fields and VINES transport header fields
required by this filter entry. Incoming packets will
be bitwise ANDed with the value of ibmvFltMask, and
if the result is equal to the value of this object, the
packet will be filtered according to the value of
ibmvFltValue.

Fields from VINES IP and transport headers used for filtering:

field length    field name
------------    ------------------------------
   8 BITS       protocol type
   4 BITS       hop count
  32 BITS       destination network number
  16 BITS       destination subnetwork number
  16 BITS       destination port number
  32 BITS       source network number
  16 BITS       source subnetwork number
  16 BITS       source port number