When the device is reset, it needs some time before the newly exposed TTYs are
able to reply to our AT commands. We increase the default timeout of the AT
probing commands in order to cope with that, or we'll end up with TTYs of
'unknown' type that aren't used for anything.
u-blox modems will append a string showing the MCC and MNC info to the access
point name listed in AT+CGDCONT? responses. We will try to detect when that
happens, and we just accept the match.
The logic doesn't just look for a string prefix; it also looks for the special
MCC + MNC suffix, which is much more restrictive, to try to avoid false
positives.
The implementation uses +UGCNTRD=? to query whether the per-PDP context
statistics are supported by the device, and if they are, +UGCNTRD is used to
query them.
We only process the statistics for the specific CID we're using.
The parser returns only the results for the CID being specified as input. This
is so that we can just query the statistics of the CID currently in use by the
bearer.
Reuse the logic and context used to update current modes, as we need the same
steps (check current power state, go into low power, config update, and recover
previous power state).
Provide a generic +CESQ based implementation for the extended Signal interface,
applicable to all AT-based modems.
We explicitly disable this check in MBIM modems.
Introduce "sms only" and "CSFB not preferred" home/roaming states to be reported
for the CS context, while already registered on LTE.
Based on 3GPP TS 27.007 v13.5.0.
Changing current allowed/preferred modes requires the device to be in low-power
mode, so we will make sure we return an error if any power operation is already
ongoing when a new one is requested.
AT+URAT=? provides the format expected, but looks like it isn't implemented
differently for the different u-blox devices seen, so we need an additional
level of filtering which currently is applied per device model string.
A default implementation to monitor the ongoing connection is provided in the
generic MMBroadbandModem, based on AT+CGACT? to check whether the PDP context
of the connection (identified by the cached cid) is active or not.
This commit also disables the connection monitoring logic in those plugins that
have custom connection methods.
Instead of setting up a custom timeout source to poll the connection status, use
the generic logic in the base bearer object, and just re-implement the command
used to check the status.
Split into two different actions the actual COPS? response parsing and the
operator name normalization process.
Also, allow parsing not only the operator string, but also the format, mode
and the optional access technology value.
