The length in the GTPU header does not specify the length of the
payload. It does specify the number of bytes following the fixed
part (the first 8 bytes) of the GTPU header (see 3GPP TS 29.060,
Sect. 9.3.1).
Change-Id: I8ce73df015e1cf1f38d306666962c0058756111c Signed-off-by: Andreas Schultz <andreas.schultz@travelping.com>