On Sunday 10 April 2011 01:34:21 Max Filippov wrote: > > > In the ARP case, when there's no other traffic on p54spi, all ARP requests > > > are dropped. But if there's some egress traffic from p54spi, filter seems > > > to work correctly: only ARP requests that match filter pass through. > > "no other traffic" sounds like a the psm filter at work, have you disabled > > it before starting the experiment? > > I ran tests first without "iwconfig wlan0 power on", rebooted and re-ran them > with PSM. Didn't notice any difference. ok. but still there's something positive about the result: ps no longer breaks everything ;) [Michael] > And having ingress traffic only doesn't help ARPs to get through. They need egress to get in. > In other words: I saw ingress packets in tcpdump, but no ARPs matching filter among them. > But once packets start to go out of p54spi, ARPs matching filter get in. Looks very strange. > > > > In the multicast case filter seems to work correctly, but it treats broadcast > > > as subject to that filtering too. By default only 01:00:5e:00:00:01 gets into > > > priv->mc_maclist, so we miss all broadcasts. > > ok, so we have to reserve a spot for ff:ff:ff:ff:ff:ff. > > But currently that cancels ARP filtering completely. Ok, so we can't have both [atm] and we can't really choose between them either. Or do you think it's worth salvaging the multicast filter for a [PATCH]? > > > These two filters seem to interfere: > > > - if we set ARP filter and multicast filter without broadcast, we miss all > > > ARPs if there's no egress traffic; > > > - if we set ARP filter and multicast filter with broadcast, or don't set > > > multicast filter at all we get all ARPs. > > > > > > This effect does not depend on filter setup order. > > interesting, well a unnamed [but trustworthy] source told us that ST identified > > a problem with the arp/multicast filter some time ago, unfortunately I haven't > > seen any updated p54spi firmwares lately. Maybe this sagred stuff works? > > "sagred stuff" ? yeah, it was a while ago... "p54spi (STLC4560) with Marvel XScale CPU (kernel 2.6.25.4)" http://www.spinics.net/lists/linux-wireless/msg55967.html AFAIK they have another p54spi firmware "phy0: FW rev 2.19.0.0.A.14 Private - Softmac protocol 5.6" Regards, Chr -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
