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Martin Heusse Martin.Heusse at imag.frHi, working on a diagnostic interface, I also ran into the lack of a gsmtap type for LTE NAS plain messages. So I am supporting Shinzo's request for a new GSMTAP_TYPE_LTE_NAS (or GSMTAP_TYPE_LTE_UU) type in packet-gsmtap.h. This type would play a similar role to that of GSMTAP_TYPE_UM for GSM, if my understanding is correct. Best regards, Martin > Unlike GSM and UMTS, LTE introduced separate layer for encryption of NAS and > RRC. As a result, while NAS messages are piggybacked to LTE RRC, but after NAS > security had been activated only encrypted NAS messages are available at RRC > layer. This is reflected into the baseband diagnostics of various makers: > Qualcomm provides separate diagnostic item for LTE NAS (both encrypted and > plain) and RRC. Separate payload type for LTE RRC and LTE NAS will solve this > issue. I can submit a patch if this looks positive. > >