Recent fragility with if_wi, 802.11 adhoc/wep, and Tiger
Robert Watson
rwatson at FreeBSD.org
Tue Jul 19 08:54:56 GMT 2005
I fairly regularly use 802.11 adhoc with WEP to communicate between my
6.x/7.x FreeBSD notebook using if_wi, and my Apple PowerBook running Mac
OS X Tiger. A few days ago, when I updated from a June to a July HEAD
revision, this became quite "fragile". Specifically, I often find that
the Mac can't send to the FreeBSD box (ARP fails, etc), and that sometimes
it will give an error when I ask it to re-connect to the ad hoc network.
I find that if I ifconfig down/up if_wi, and likewise turn off and on the
wireless on the PowerBook, it seems to recover. I've not had a chance to
really try and diagnose this at all -- i.e., does tcpdump show packets on
either end, 802.11 state machine, etc. I was wondering if anyone else has
seen this problem, though.
Robert N M Watson
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