Hi Denis,

> I applied this patch, but have done heavy refactoring afterwards.
> Please review all my changes (~20 or so patches intermixed with yours)
> and make sure everything makes sense.  I lightly tested this
> functionality with gsmdial and everything seems to be performing well.
>
> However, please test it really well yourself, use valgrind and try every
> exceptional condition you can think of.
>

I see you have changed the way PPP packets exchange start, that was what 
was missing me.
Now we don't need anymore to copy into emulator structure the PN 
settings as we can directly
pass the values to the PPP stack.
I also forgot to use set_write_done to trigger the resume GAtPPP/suspend 
GAtChat.
It sounds ok to me.

I have tested it with Windows 7 DUN client and everything seems to work.
I have also found a way to test escape sequence from Windows 7 DUN client,
you just have to turn off your bluetooth adapter while you are connected 
to oFono DUN server.
It will send +++ --> ATH0 and turn the adapter off.

Kind regards,
Guillaume