broadband-modem: enable and handle +CGEV indications
Compare changes
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
The +CGEV indications allow us to get notified of packet domain events like network-initiated or ME-initiated disconnections on specific connected contexts, as well as full PS detach events (all contexts disconnected). If the modem supports these indications, we will enable them with +CGEREP and will then process them when they are emitted by the modem.
If a full PS detach event happens, we will explicitly disconnect all connected bearers.
If a deactivation inidication is received for a single context, we will look for the associated bearer by CID and explicitly disconnect it.