RADIUS attribute from rfc2869

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Acct-Output-Gigawords

This attribute indicates how many times the Acct-Output-Octets
      counter has wrapped around 2^32 in the course of delivering this
      service, and can only be present in Accounting-Request records
      where the Acct-Status-Type is set to Stop or Interim-Update.

   A summary of the Acct-Output-Gigawords attribute format is shown
   below.  The fields are transmitted from left to right.

    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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Type      |    Length     |             Value
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
              Value (cont)         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      53 for Acct-Output-Gigawords.

   Length

      6

   Value

      The Value field is four octets.

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