On Thu, Aug 03, 2006 at 01:08:51PM -0700, Stephens, Allan wrote:
> Where I think my confusion is arising is in the details of how the
> filtering
> controlled by the promiscuous setting is actually done. If a packet
> with
> the "wrong" destination address arrives at an interface, who checks to
> see
> whether the interface has been configured as promiscuous and
> passes/discards it
> accordingly? I have naively assumed that this was handled in hardware
> on the
> NIC card in a real system, but is it really done by software?
Ah, a light goes on. I believe that it is done on the card.
> What I seem to
> be
> observing in my UML testing is that *nobody* is doing this filtering,
> resulting in
> unwanted packets being handed to my protocol (which sits directly on top
> of the
> Ethernet driver).
And since UML doesn't have "cards", it may be that the driver should do the
filtering at the bottom layer and it isn't.
Jeff
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