DSS usage

Arnaud Desmier adesmier at sequans.com
Thu Apr 10 19:32:08 PDT 2014

On 11/04/2014 00:02, Aleksander Morgado wrote:
> On Thu, Apr 10, 2014 at 9:47 PM, Bjørn Mork <bjorn at mork.no> wrote:
>> For example, if you want to support NMEA over DSS using gpsd, then you
>> will create a userspace application which
>>   - starts the appropriate DSS session
>>   - creates the matching VLAN
>>   - proxies the VLAN to a pty, adding and stripping ethernet headers
>>   - adds the pty to the list of gpsd devices
>> I believe it would make sense for libmbim to provide utility functions
>> taking care of the first three.
> Yes, we should handle that case. As you say, the VLAN is just a
> convenient interface, which may not be what user-space expects (e.g. a
> character device). If possible libmbim/mbimcli should allow handling
> those 3 first steps.
If we continue using VLAN we still depends on wwan interface status to 
access DSS channels. So we have to link NetworkManager to libmbim to 
avoid putting down wwan interface if there is any DSS channel open.

What about opening DSS channel when wwan interface is down?

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