netdev - Re: Phonet userspace bits?

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Date:	Sun, 15 Nov 2009 18:31:23 +0200
From:	"Rémi Denis-Courmont" <remi@...lab.net>
To:	dag@...ke.com
Cc:	netdev@...r.kernel.org
Subject: Re: Phonet userspace bits?

	Hello,

Le dimanche 15 novembre 2009 18:15:25 dag@...ke.com, vous avez écrit :
> How do an end-user make use of a phonet network interface?
> 
> Nov 15 16:31:54 toshr500 usb 1-1: New USB device found, idVendor=0421,
>  idProduct=046e Nov 15 16:31:54 toshr500 usb 1-1: New USB device strings:
>  Mfr=1, Product=2, SerialNumber=0 Nov 15 16:31:54 toshr500 usb 1-1:
>  Product: Nokia 6110 Navigator
> Nov 15 16:31:54 toshr500 usb 1-1: Manufacturer: Nokia
> Nov 15 16:31:54 toshr500 usb 1-1: configuration #1 chosen from 1 choice
> Nov 15 16:31:54 toshr500 cdc_acm 1-1:1.8: ttyACM0: USB ACM device
> 
> So I can use /dev/ttyACM0 with pppd and get a 3G connection. so far, so
>  good.
> 
> But what is the usbpn0 network interface, and could I use that instead of
>  fiddling with chatscripts and pppd, to get a 3G connection? Is this
>  feature complete?

Just like with PPP, only the Phonet data path is implemented in kernel. The 
setup is done in userspace. In theory, it could be done in kernelspace too, 
but there was strong reluctance against this on usb-devel. And well, maybe we 
don't want to taint the kernel with too much of the GPRS specifics.

There was a preliminary patch adding the userspace bits to oFono here:
http://lists.ofono.org/pipermail/ofono/2009-September/000376.html
(especially part 0003) but this is still work in progress.

Best regards,

-- 
Rémi Denis-Courmont
http://www.remlab.net/
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