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Date:      Wed, 24 Dec 2008 10:43:07 -0500
From:      gnn@freebsd.org
To:        Julian Elischer <julian@elischer.org>
Cc:        net@freebsd.org
Subject:   Re: A new tool for low level testing...
Message-ID:  <7i63l9r33o.wl%gnn@neville-neil.com>
In-Reply-To: <4951515C.4030706@elischer.org>
References:  <7ihc4u3adr.wl%gnn@neville-neil.com> <4951515C.4030706@elischer.org>

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At Tue, 23 Dec 2008 13:00:12 -0800,
julian wrote:
> 
> gnn@freebsd.org wrote:
> > Hi,
> > 
> > I just checked in a small tool to HEAD in
> > /usr/src/tools/tools/ether_reflect which uses pcap and bpf to reflect
> > ethernet packets just about the driver layer without involving the
> > protocol stacks.  This is useful for people doing low level testing of
> > drivers and switches.  If you happen to be lucky enough to have an
> > ethernet packet generator (ixia et al) this will do what you want in
> > terms of reflecting the packets back.
> > 
> > Later,
> > George
> > _______________________________________________
> > freebsd-net@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-net
> > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
> 
> 
> OR
> 
> ngctl mkpeer em0: echo lower echo
> 
> 
> hmmmmm no this would leave the source and destination headers in hte 
> same order.. they need to be swapped..
> 
> ok so I need to make a patch, but it would be much quicker than a user 
> utility..

I agree that netgraph is the right long term answer.  I look forward
to what you come up with.

Also, +1 to an improved set of docs on netgraph.

Later,
George



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