the main issue was the plmn_selected variable. the solution
was to create a function to enter the deregistered state that resets the variable
and performs all other actions that need to be performed, like clearing
EPS bearers.
The patch also extends the SS to support AT commands to enable/disable
data services and now succesfully passes TC_9_2_2_1_7
using the local rx count has caused issues when our UE
missed one NAS message was therefore out-of-sync and then
dropped all following NAS messages due to integrity failure
the NAS spec clearly states that the UE should use the
count received as an input for the integrity check calculation
when going RRC idle, NAS gets informed and currently
clears all registered EPS bearers. This is wrong because
the EPS can outlive a RRC session.
Also in the conformance tests it's clearly seen
that after a RRC release a dedicatated EPS bearer is
created with a linked EPS bearer ID that has been
created _before_ RRC went idle.
this fixes the issue when the stack is torn down if, for example,
the radio couldn't be loaded correctly. it will hence call stop() on all stack
components which are not initialzized yet, and logging therefore doesn't work.
the log object is know during contruction time and therefore can be passed
in as soon as possible.
- add interface to RRC to allow NAS to query the DRB for a given
EPS bearer id
- extend interface for NAS to setup GW to also pass LCID of bearer
- in NAS, use this new interface to pass actual LCID of the default
DRB when creating the TUN device
- abstract UE object now consists of a radio, a PHY, and a stack layer
- add new stack abstraction layer that combines MAC, RLC, RRC, PDCP, NAS and GW
- PHY layer now has a single stack interface and does not talk to MAC and RRC seperatly
Francisco Paisana