Recent fragility with if_wi, 802.11 adhoc/wep, and Tiger

[Michal Mertl]

Sam Leffler píše v čt 21. 07. 2005 v 22:02 -0700:
> Michal Mertl wrote:
> > Sam Leffler wrote:
> > 
> >>Michal Mertl wrote:
> >>
> >>>Robert Watson wrote:
> >>>
> >>>
> >>>>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.
> >>>
> >>>
> >>>Yes, I'm also experiencing similar problems. The problems seem to happen
> >>>also with different wireless cards and without wep. They were reported
> >>>by Johann Hugo on 14th in an email titled "ath hostap - clients
> >>>assosiated, but no comms" too.
> >>>
> >>>Another problem with WiFi which Johann reported long time ago is that
> >>>bridging on atheros (only?) AP works really bad. I get very varying ping
> >>>response (50 - inf. ms). Sometimes it seems the packets get queued
> >>>somewhere - after some time I receive several replies at once.
> >>
> >>I routinely bridge ath cards (a wide variety) with bge using bridge and 
> >>see no problems.  I get ~36 Mb/s in 11a w/ superg features and ~28 Mb/s 
> >>w/ basic stuff (what you find in RELENG_6).  ping times are what you'd 
> >>expect (<1ms).
> > 
> > 
> > I'm sorry, I was too brief in the description of the problem. It's the
> > bridging on the card which works slow.
> > 
> > I run an ath card in hostap mode and several wireless clients connect to
> > it and are on the same IP network. The ping from one client to another
> > is slow yet both ping the AP fine. I think that in this situation the
> > bridging is done by ath (in HAL?) and configured by 'ifconfig apbridge'.
> 
> Should be fixed by ieee80211_input.c rev 1.63.
> 
> 	Sam

Yes, the (ap)bridging works now.

Thank you so much.

Michal