how to start dedicated bearer through libqmi?

[Dan Williams]

On Fri, 2016-09-23 at 21:23 +0000, Chen, Jing wrote:
> Hi, Dan:
> 
> Thank you so much for your response!
> 
> I need to send multiple data traffics with different TFT on secondary
> PDP contexts/dedicated bearers after primary/default is connected. I
> saw a definition  of profile in Gobi driver. I am wondering: has
> libqmi implemented corresponding function as well? 

Jing,

GetProfileList and GetProfileSettings are implemented, but
CreateProfile isn't yet.  ModifyProfile almost certainly could be a
copy & paste of CreateProfile's JSON with an update to the "id" field.

I've pushed a WDS JSON update adding CreateProfile if you want to take
a stab at filling out the following TLVs:

UMTSRequestedQoS
UMTSMinimumQoS
TrafficFlowTemplateID1Parameters
TrafficFlowTemplateID2Parameters
LTEQoSParameters

which you're probably interested in.  The only not-simple thing about
these is creating the GLib enums for the enum values in these values.

Take a look at:

gobi-api/GobiAPI_2012-09-12-0719/GobiConnectionMgmt/GobiConnectionMgmtAPIStructs.h

for the string "WDSCreateProfileRequest" which should hit all the TLVs
that QMI supported in a somewhat older version of the WDS service.  Let
me know if this is something you'd be interested in decoding and I'm
happy to describe the steps.  Might take a couple hours, but not too
long.

Dan

> 
> Jing
> 
> 
> -----Original Message-----
> From: Dan Williams [mailto:dcbw at redhat.com] 
> Sent: Friday, September 23, 2016 2:37 PM
> To: Chen, Jing; libqmi-devel at lists.freedesktop.org
> Subject: Re: how to start dedicated bearer through libqmi?
> 
> On Thu, 2016-09-15 at 20:37 +0000, Chen, Jing wrote:
> > 
> > Hello, Everybody:
> > Could libqmi do fine operations/controls on the connected QMI
> > device?
> > For example, "+CGACT" is the AT command to control each PDP context
> > or 
> > bearer. And, "+CGDATA" is the AT command to send data traffic
> > through 
> > specific context ID.
> > 
> > What is the corresponding API function in libqmi to achieve the
> > same 
> > goals? I know there is a function "qmi_client_wds_start_network"
> > could start network, with "ifconfig wwan0 up" + "dhclient wwan0 "
> > system commands followed to have the interface up and an IP
> > address 
> > allocated.
> > 
> > If my target is to control each default/dedicated bearer in the 
> > connected QMI device, assuming the hardware supported, how could I
> > use 
> > libqmi to achieve my goal? Thank you so much!
> 
> From what we understand, what QMI calls "Profiles" are equivalent to
> PDP contexts.  So WDS' GetProfileList command should return the list
> of contexts, and WDS GetProfileSettings would return the actual
> settings of the context.
> 
> The CGDATA analogue in QMI would pretty much be WDS StartNetwork.
>  That would of course also include doing the stuff CGACT does.
> 
> I'm not sure about the CGACT analogue; I could be wrong but I don't
> think the GoActive/GoDormant stuff isn't related to context
> activation, that's more for power control while active.
> 
> The CGATT analogue for CGATT would be NAS InitiateAttachRequest.
> 
> On a slightly higher level, what are you trying to do with the
> bearers?
>  That might help narrow things down.
> 
> Dan
> 
> > 
> > [cid:image001.png at 01D20F56.5B7FC530]
> > 
> > Jing Chen
> > 
> > 
> > 
> > 
> > 
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