Bad messages:

aar-bad.hex: comes from ../xml_examples/aar.xml
             Consists in a deliberated bad length encoded on grouped Subscription-Id length field (not multiple of 4).

aar2-bad.hex: comes from ../xml_examples/aar2.xml
              Consists in a deliberated bad length encoded on enumerated Flow-Status avp 2-level nested inside Media-Component-Description:
                         -> Media-Component-Description  (grouped)
                            -> Media-Sub-Component       (grouped)
                               -> Flow-Status            (enumerated)

aar3-bad.hex: comes from ../xml_examples/aar2.xml
              Consists in a deliberated bad value (16) encoded on enumerated Flow-Status avp (range 0-15) 2-level nested inside Media-Component-Description:
                         -> Media-Component-Description  (grouped)
                            -> Media-Sub-Component       (grouped)
                               -> Flow-Status            (enumerated)