We are going to have logical operations like Phone Call, SMS,
Paging, Updating Request on a logical channel and for each of
these operations we might need to store state. For now pointers
in gsm_lchan look like the best way of doing this and we start
by introducing an operation for the location updating request.
The new flow of things are:
- We get the location updating request and update/create
the subscriber and maybe send the identity requests to
the mobile station
- We start the updating timer, if it times out we will
reject the mobile station.
- Once we get the Identity Responses we have asked for
and the reject timer did not fire yet we might accept
the user.
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