2.1.1. Traffic Classification Sub-Data Item

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Original RFC Text

2.1.1.  Traffic Classification Sub-Data Item

   All Traffic Classification Sub-Data Items share a common format that
   is patterned after the standard DLEP Data Item format.  See
   Section 11.3 of [RFC8175].  There is no requirement on, or meaning
   to, Sub-Data Item ordering.  Any errors or inconsistencies
   encountered in parsing Sub-Data Items are handled in the same fashion
   as any other Data Item parsing error encountered in DLEP.  See
   [RFC8175].

   The format of the Traffic Classification Sub-Data Item is as follows:

        0                   1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       | Sub-Data Item Type            | Length                        |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       ~                           Value...                            ~
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Sub-Data Item Type:
      A 16-bit unsigned integer that indicates the type and
      corresponding format of the Sub-Data Item's Value field.  Sub-Data
      Item Types are scoped within the Data Item in which they are
      carried, i.e., the Sub-Data Item Type field MUST be used together
      with the Traffic Classification Data Item Type to identify the
      format of the Sub-Data Item.  Traffic Classification Sub-Data Item
      Types are managed according to the IANA registry described in
      Section 5.2.

   Length:
      Variable

      Per Section 11.3 of [RFC8175], Length is a 16-bit unsigned integer
      that is the number of octets in the Sub-Data Item, excluding the
      Data Item Type and Length fields.  Each Sub-Data Item has its own
      Length field.

   Value:
      A field of <Length> octets that contains data specific to a
      particular Data Item.