From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Zhang, Zhenhua <zhenhua.zhang@intel.com>
Subject: RE: About Connection between PPP and linux Sockets
Date: Fri, 20 Aug 2010 10:21:52 +0800
Message-ID: <33AB447FBD802F4E932063B962385B352A3540B8@shsmsx501.ccr.corp.intel.com>
In-Reply-To: <4C6DE51A.4010703@neusoft.com>
List-Id: <ofono.ofono.org>
To: ofono@ofono.org

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Hi Steven,

Steven wrote:
> Hi Zhang,
> =

> Zhang, Zhenhua wrote:
>> Hi Steven,
>> =

>> Steven wrote:
>>> Hi Zhang
>>> Zhang, Zhenhua wrote:
>>>> Hi Marcel,
>>>> =

>>>> Marcel Holtmann wrote:
>>>>> Hi Steven,
>>>>> =

>>>>>> I have a little question just as the title said?
>>>>>> In Ofono how to connect PPP to Linux socket, when we receive
>>>>>> packet from network, how the packet go through the kernel to
>>>>>> application=EF=BC=9F =

>>>>>> =

>>>>>> modem -->PPP-->? --> linux kernel(network part)--> socket -->
>>>>>> application?
>>>>> it is more like this:
>>>>> =

>>>>> modem -> TTY -> PPP -> TUN/TAP -> Kernel Net-Stack -> socket ->
>>>>> application. =

>>>>> =

>>>>> With the TTY being in kernel, the PPP being in userspace, and
>>>>> TUN/TAP etc. begin in the kernel again.
>>>>> =

>>>>> A future enhancement is to use the kernel PPP layer, but we
>>>>> haven't gotten there yet.
>>>> I am interested to know how could we use kernel PPP layer instead
>>>> of gatppp. Shall we add this item into our TODO?
>>>> =

>>> Maybe you can reference to RILD in Android, it used kernel PPP.
>> =

>> Thanks. Will take a look then.
> =

> This information is a good start point.
> http://www.devdiv.net/viewthread-26543
> =

> But only for Chinese people:(

Thanks. I have read this before. ;-). The original article is from maxleng'=
s blog:

http://blog.csdn.net/maxleng/archive/2010/05/10/5576509.aspx

However, it's just a big picture about phone stack in Android. It said noth=
ing about how Android works with kernel PPP layer.

> B.R
> =

> Steven
> =

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Regards,
Zhenhua

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