Subject: kern/23053: BayStack 650 sends bogus beacons
To: None <>
From: None <>
List: netbsd-bugs
Date: 10/04/2003 21:24:20
>Number:         23053
>Category:       kern
>Synopsis:       BayStack 650 sends bogus beacons
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Oct 04 21:25:00 UTC 2003
>Originator:     David Young
>Release:        NetBSD 1.6ZC
OJC Technologies
NetBSD  1.6ZC
     $NetBSD: awi.c,v 1.53 2003/07/06 20:01:17 dyoung Exp $
     $NetBSD: if_awi_pcmcia.c,v 1.26 2002/10/02 16:52:09 thorpej Exp $
Architecture: i386
Machine: i386
BayStack 650 frequency-hopping wireless cards send bogus beacons
with source address and bssid equal to 0:0:0:0:0:0, e.g.,

# tcpdump -ne -D ieee802_11 -i awi0
11:20:37.091067 BSSID:0:0:0:0:0:0 DA:ff:ff:ff:ff:ff:ff SA:0:0:0:0:0:0 Beacon (bs650) [1.0* Mbit] ESS CH: 0 

hosta> ifconfig awi0 nwid bs650 mediaopt hostap inet
hostb> ifconfig awi0 nwid bs650 inet
# observe that hostb does not form an association, monitor the
# channel and detect the bogus beacons:
hostb> tcpdump -ne -D ieee802_11 -i awi0