PIPE use in ofono

PIPE use in ofono

[Hemant-vilas RAMDASI]

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Is pipe/pep concept in ISI  modem, specific to a modem inside N900? Or is it generic to any Nokia modem?

Regards,
Hvr

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Re: PIPE use in ofono

[=?unknown-8bit?q?R=C3=A9mi?= Denis-Courmont]

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On Tue, 20 Jul 2010 09:22:04 +0200, Hemant-vilas RAMDASI
<hemant.ramdasi@stericsson.com> wrote:
> Is pipe/pep concept in ISI  modem, specific to a modem inside N900? Or is
> it generic to any Nokia modem?

It should be available in any Nokia modem that exposes the USB CDC Phonet
vendor-specific interface. If I recall correctly, it worked with my Nokia
N95.

-- 
Rémi Denis-Courmont
http://www.remlab.net
http://fi.linkedin.com/in/remidenis

RE: PIPE use in ofono

[Hemant-vilas RAMDASI]

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Today's Phonet stack in 2.6.24, gprs interface looks like virtual interface (similar to TUN) where no connection with real hardware is possible. 
I can't understand how peps (one on modem and other on linux phonet stack) are connected, so that IP packets coming from nokia modem can be forwarded to IP stack directly instead of routing from user space using sequence socket. 
Is it possible with today's phonet stack? Is there a need of third entity like controller to do this?

Thanks,
Hvr

-----Original Message-----
From: ofono-bounces(a)ofono.org [mailto:ofono-bounces(a)ofono.org] On Behalf Of Rémi Denis-Courmont
Sent: Tuesday, July 20, 2010 1:26 PM
To: ofono(a)ofono.org
Subject: Re: PIPE use in ofono


On Tue, 20 Jul 2010 09:22:04 +0200, Hemant-vilas RAMDASI
<hemant.ramdasi@stericsson.com> wrote:
> Is pipe/pep concept in ISI  modem, specific to a modem inside N900? Or is
> it generic to any Nokia modem?

It should be available in any Nokia modem that exposes the USB CDC Phonet
vendor-specific interface. If I recall correctly, it worked with my Nokia
N95.

-- 
Rémi Denis-Courmont
http://www.remlab.net
http://fi.linkedin.com/in/remidenis

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Re: PIPE use in ofono

[=?unknown-8bit?q?R=C3=A9mi?= Denis-Courmont]

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Le mardi 20 juillet 2010 14:33:51 Hemant-vilas RAMDASI, vous avez écrit :
> Today's Phonet stack in 2.6.24, gprs interface looks like virtual interface
> (similar to TUN) where no connection with real hardware is possible.

Phonet was released in Linux kernel 2.6.27 if I recall correctly.

> I
> can't understand how peps (one on modem and other on linux phonet stack)
> are connected, so that IP packets coming from nokia modem can be forwarded
> to IP stack directly instead of routing from user space using sequence
> socket.

The virtual GPRS network interface runs on top of the Phonet packet socket, 
much like a virtual PPP network interfaces run on top of a TTY port.

The packet socket itself is the Linux-side endpoint of the Phonet pipe between 
the modem and the Linux CPU.

> Is it possible with today's phonet stack? Is there a need of third
> entity like controller to do this?

That's done with the pep_gprs.c network device driver. However, GPRS signaling 
needs to be done in userspace. This is implemented in oFono already.

-- 
Rémi Denis-Courmont
http://www.remlab.net/
http://fi.linkedin.com/in/remidenis