On Thu, Apr 03, 2008 at 04:01:53PM +0200, Johannes Berg wrote: > > > My log files are filling up with these messages: > > > [ 8722.198929] wlan0: RX non-WEP frame, but expected encryption > > > [ 8726.506345] __ratelimit: 14 messages suppressed Is the network using WEP or TKIP/CCMP? > Ok, I got packets from Miles, and this is what I found: > > IEEE 802.11 Data, Flags: ......F. > Type/Subtype: Data (0x20) > Frame Control: 0x0208 (Normal) > Duration: 44 > Destination address: <his STA MAC> > BSS Id: <his Netgear AP> > Source address: <his Netgear AP> > Fragment number: 0 > Sequence number: 3874 > Logical-Link Control > DSAP: NULL LSAP (0x00) > Data (1472 bytes) > 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > * all zeroes > Note how the LLC header is also all-zeroes. Also note how the duration > field is totally bogus. The sequence number is actually correct. What's wrong with the duration field value? The dump here does not indicate which transmit rate was used, so I don't know what TX rate the ACK would use, but 44 sounds like a reasonable duration value for 802.11g rates.. > Does anybody have an explanation for that except that the AP software is > messing it up? Looks like an interesting AP behavior to me.. > In any case, I suppose the message in question isn't actually necessary. > I'll make it depend on verbose debugging maybe. Yes, that sounds reasonable. The AP should not be sending this kind of crap, but well, what can you do if it does.. In theory, this could also be showing up in multi-SSID configuration when another SSID is configured to use unencrypted frames (though, that would cause interop issues in association for number of clients..). -- Jouni Malinen PGP id EFC895FA -- 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
