From: James Chapman <jchapman@katalix.com>
To: Dan Williams <dcbw@redhat.com>
Cc: Kevin Lloyd <klloyd@sierrawireless.com>, netdev@vger.kernel.org
Subject: Re: Network device driver with PPP
Date: Thu, 28 Feb 2008 09:27:03 +0000 [thread overview]
Message-ID: <47C67E67.70604@katalix.com> (raw)
In-Reply-To: <1204164955.26292.5.camel@localhost.localdomain>
Dan Williams wrote:
> On Wed, 2008-02-27 at 17:28 -0800, Kevin Lloyd wrote:
>> Hi all,
>>
>> I have a device that is currently supported via a combination of loading the device with usb-serial (drivers/usb/serial/sierra) to expose the serial ports and connecting by manually launching pppd.
>> I would like to support this device in a network driver as opposed to a serial driver in an effort to offer a seamless always-on device, such as an Ethernet device.
>>
>> From what I understand the ppp support in the kernel is only for ppp framing and that all control (e.g., IPCP) is done in user-space via pppd. Are there any network drivers that currently manage the ppp connection (entirely, IPCP included) internally to the driver and expose either a raw ip or ethernet stream to the user-space?
>
> That seems quite icky to do all in kernel space and a pile of code
> running in the kernel. What's so wrong with userspace? Don't you need
> to push values to the driver like username/password and get IP config
> out of it (which would involve userspace anyway)? It just seems like
> there's a different solution to your actual problem here than stuff all
> off pppd into kernel space.
I agree.
Kevin mentions manually launching pppd and the desire for a seamless
always-on device. I think this could be done using udev/hotplug rules to
launch/stop pppd automatically when the usb device is hot-plugged. No
additional kernel support needed.
--
James Chapman
Katalix Systems Ltd
http://www.katalix.com
Catalysts for your Embedded Linux software development
next prev parent reply other threads:[~2008-02-28 9:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-28 1:28 Network device driver with PPP Kevin Lloyd
2008-02-28 2:15 ` Dan Williams
2008-02-28 9:27 ` James Chapman [this message]
2008-02-28 16:19 ` Kevin Lloyd
2008-02-29 15:02 ` James Chapman
2008-03-01 1:41 ` Kevin Lloyd
2008-03-01 12:08 ` James Chapman
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