From: =?unknown-8bit?q?R=C3=A9mi?= Denis-Courmont <remi@remlab.net>
To: ofono@ofono.org
Subject: Re: About Connection between PPP and linux Sockets
Date: Fri, 20 Aug 2010 15:11:40 +0200 [thread overview]
Message-ID: <6d4cb3c3e5039f1b09ef29d548ef1530@chewa.net> (raw)
In-Reply-To: <1282304015.23399.210.camel@localhost.localdomain>
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On Fri, 20 Aug 2010 13:33:35 +0200, Marcel Holtmann <marcel@holtmann.org>
wrote:
> for a mobile telephony stack, pppd is wrong. Once you understand how 3G
> missuses PPP for IP and PDP context setup, you see what I mean ;)
For mobile telephony, PPP as a _protocol_ is wrong - sure. That being
stated, I don't see how pppd as a _software_ is better or worse than any
other PPP implementation.
Considering the high bandwidth involved in high HSPA categories, and soon
LTE networks, going through user space seems like a bad idea. That's why
Phonet GPRS has its own kernel network device driver, even though Phonet
can also interact with a TUN device. As such, the PPP-only modems are
hopeless. Then why bother rewriting a custom PPP implementation that will
be suboptimal in any case?
oFono PPP is just as non-performant as pppd in case the user-space AT MUX
is used. And it seems worse in case the kernel AT MUX or a raw TTY is used
(pppd has kernel path then).
So I must be missing something.
--
Rémi Denis-Courmont
http://www.remlab.net
http://fi.linkedin.com/in/remidenis
next prev parent reply other threads:[~2010-08-20 13:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-19 9:31 About Connection between PPP and linux Sockets Steven
2010-08-19 10:54 ` Marcel Holtmann
2010-08-20 0:51 ` Zhang, Zhenhua
2010-08-20 1:18 ` Marcel Holtmann
2010-08-20 1:24 ` Steven
2010-08-20 1:43 ` Zhang, Zhenhua
2010-08-20 2:14 ` Steven
2010-08-20 2:21 ` Zhang, Zhenhua
2010-08-20 8:29 ` Marcel Holtmann
2010-08-20 8:53 ` Steven
2010-08-20 11:33 ` Marcel Holtmann
2010-08-20 13:11 ` =?unknown-8bit?q?R=C3=A9mi?= Denis-Courmont [this message]
2010-08-20 13:48 ` Marcel Holtmann
2010-08-20 0:57 ` Steven
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