linux-kernel - Re: sending raw packets via PPP

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Date:	Tue, 7 Aug 2007 06:33:26 -0400
From:	James Carlson <carlsonj@...kingcode.com>
To:	Christopher Fowler <cfowler@...postsentinel.com>
Cc:	Kevin K <k_krieser@...global.net>, linux-ppp@...r.kernel.org,
	Linux-kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: sending raw packets via PPP

Christopher Fowler writes:
> On Mon, 2007-08-06 at 19:24 -0500, Kevin K wrote:
> > The DHCP source code therefore wants  
> > to send raw packets (SOCKET_PACKET) (down to the ethernet addressing  
> > info).  
> 
> I can imagine that would be the case.  The box requesting the DHCP
> address has no IP address.

That's not always true.  DHCP works fine on systems that already have
IP addresses -- address leasing is an _optional_ part of the protocol.
You can use DHCPINFORM to retrieve configuration parameters alone if
you already have an address.

Note that address assignment is technically optional in PPP (IPCP) as
well, so it would be possible to refuse IPCP addresses and then use
DHCP to acquire the needed information.  It'd be strange to do, though.

-- 
James Carlson         42.703N 71.076W         <carlsonj@...kingcode.com>
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