linux-kernel - Re: [PATCH 02/03] net/bridge: add support for EtherIP devices

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Message-ID: <20060925082445.GB23028@zlug.org>
Date:	Mon, 25 Sep 2006 10:24:45 +0200
From:	Joerg Roedel <joro-lkml@...g.org>
To:	Stephen Hemminger <shemminger@...l.org>
Cc:	Patrick McHardy <kaber@...sh.net>, davem@...emloft.net,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 02/03] net/bridge: add support for EtherIP devices

On Sat, Sep 23, 2006 at 09:01:12PM -0700, Stephen Hemminger wrote:

> If the device looks like a duck (Ethernet), then why does it need
> a separate ARP type.  There are other tools that might work without
> modification if it just fully pretended to be an ether device.

This solves the problem of getting a list of all EtherIP devices. If
they use ARPHRD_ETHER and use an ioctl in the SIOCDEVPRIVATE space is
not a save way (not even if the ioctl uses ethip0, this device could be
owned by another driver if EtherIP is not present).
On the other hand, a new ARP type opens a lot of new problems. A lot of
userspace tools and libraries must be changed. So this solutions is not
perfect.

Cheers,
Joerg
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