UE Register with TMSI: reply with a Register Reject

When receiving a UE Register Request with TMSI and no IMSI, compose a
Register Reject with the same UE Identity and send.

The accepting function expects a ue_context argument and composes the
message from the IMSI found there. This new rejection message cannot rely
on a ue_context struct and hence uses the asn1 uE_Identity directly.

Change-Id: Ia47e398e50e316842cd260dc0d9a4e2d8a1c627c
1 file changed