Hi Marcel，
Marcel Holtmann wrote:
Hi Zhenhua,
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？
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 nothing
about how Android works with kernel PPP layer.
could be that Andoid uses the kernel PPP and also uses pppd for it. We
are not using pppd on purpose since it is the wrong piece for an
embedded phone solution. We are not using the kernel PPP part, because
we haven't gotten around that yet. It also only works when having real
TTY devices.
I don't think using pppd is a wrong piece for embedded phone, if we
using pppd, we can ease the ppp part of ofono and also support full ppp
functionalities, such as auth method(plain text, pap, chap, eap and so on)
If your multiplexer runs in userspace then you also have
the problem that you don't have a real TTY. And using a PTS, then you
can just run PPP also in userspace.
A little question, if we runs multiplexer in kernel space, can we using
kernel ppp part?
Steven
---------------------------------------------------------------------------------------------------
Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s)
is intended only for the use of the intended recipient and may be confidential and/or privileged of
Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is
not the intended recipient, unauthorized use, forwarding, printing, storing, disclosure or copying
is strictly prohibited, and may be unlawful.If you have received this communication in error,please
immediately notify the sender by return e-mail, and delete the original message and all copies from
your system. Thank you.
---------------------------------------------------------------------------------------------------
_______________________________________________
ofono mailing list
[email protected]
http://lists.ofono.org/listinfo/ofono
