Re: [Madwifi-users] tri-mode scanning with kismet
Status: Beta
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From: Greg C. <ma...@at...> - 2003-08-13 18:11:07
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I'm not suggesting the crash is good - that's a real embarassment. what I was getting at was that if the driver is in G-only mode and not B/G mode then it will receive only noise and that could be causing the code to reach some corners that haven't been fully explored. The other open question is to understand why this behavior is aggravated by monitor mode. g Blaine Korcel wrote: > No. I've run these tests both at the office and at home. In both locations > I use a "b" AP but other than that, it's the only "noise" that is generated. > In this case though I would hope that it could deal with that. In any > event, a noisy environment shouldn't result in a crash. > > > >>I'm guessing that your card is getting lots of phy errors when it switches >>into G mode. Do you have a noisy 2.4 environment? >> >>Blaine Korcel wrote: >> >>>>There's a couple things I'd like to request. >>>> >>>>First, see if you can rmmod the driver. >>>>Must to ath_pci first followed by the other two modules. >>>>Probably need to remove the card first. >>>> >>>>Next, plug in the card and install a fresh driver if it is not automatic >>>>on your setup. without running kismet, see if you can ftp or rsync >>>>a few hundred megabytes of file uplink and downlink from your laptop. >>>>Note the bandwidth. >>> >>> >>>Ok I did this with a rather large file...interesting though I couldn't > > get > >>>wireless association to work using cardmgr...had to do it all manually > > with > >>>ifconfig and iwconfig...although that's another issue I'll deal with >>>later.... >>> >>>I only have a "b" AP so these tests are with a clean boot, no kismet, > > manual > >>>interface setup, 128bit WEP, fresh driver load. >>> >>>using scp I got 94kb/sec throughput >>>using ftp I got 69kb/sec interesting but both seem rather poor. I'll > > have > >>>to try it with another "b" only card and see what happens. >>> >>>There were no crashes during the test. >>> >>> >>> >>>>If you can get thru that successfully - which is the expected behavior - >>>>but it crashes when you bring up kismet and monitor mode, then >>>>that makes a good argument for looking into the monitor mode patches >>>>in the wlan.o module. >>> >>> >>>Ok as described in a previous post, at this point, I can jump into > > kismet, > >>>monitor mode, and can even scan all the channels without a crash...as > > long > >>>as I stay in mode 2. >>> >>>I switch to mode 3 and all kinds of problems begin. Kismet will scan > > for a > >>>short time and then stop. I get in the logs >>> >>>kernel: ath0: hardware error; resetting and that continues for quite > > some > >>>time if left alone. might be because I have previously configure using >>>ifconfig ath0 up >>> >>>At this point I do >>> >>>ifdown ath0 >>>iwpriv ath0 mode 3 >>> >>>then start kismet....in 34 seconds the machine locks up. >>> >>>I still feel the problems are with mode 3 or "g" mode and not > > specifically > >>>with monitor mode..although it could be related somehow. I wish I had a > > "g" > >>>AP to test with. >>> >>> >>> >>>>thanks, >>>> >>>>g >>>> >>>>Blaine Korcel wrote: >>>> >>>> >>>>>also, >>>>> >>>>>I have only been using this card with kismet...not as a general >>> >>>networking >>> >>> >>>>>device. >>>>> >>>>>If you have some tests you would like me to run, let me know. >>>>> >>>>>Blaine >>>>>----- Original Message ----- >>>>>From: "Greg Chesson" <ma...@at...> >>>>>To: "Blaine Korcel" <ko...@se...> >>>>>Sent: Tuesday, August 12, 2003 3:43 PM >>>>>Subject: Re: [Madwifi-users] tri-mode scanning with kismet >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>>can you let us know if your kernel crashes only happen when running >>>>> >>>>>kismet? >>>>> >>>>> >>>>> >>>>>>If so, then we can concentrate on the monitor mode patches. >>>>>> >>>>>>Also, when running kismet are you doing anything else that would >>> >>>exercise >>> >>> >>>>>>either the protocol stacks or the madwifi driver? >>>>>> >>>>>>g >>>>>> >>>>>>Blaine Korcel wrote: >>>>>> >>>>>> >>>>>> >>>>>>>Looks like the trimode cards support multiband scanning in Kismet. > > For > >>>>>>>those that care to try it. >>>>>>> >>>>>>>You need to set up kismet.conf with something like the following : >>>>>>> >>>>>>>source=prism2_hostap,ath0,combocard >>>>>>>sourcechannels=combocard:1,2,3,4,5,56,58,60 >>>>>>> >>>>>>>add all the channels to "sourcechannels" that your card supports, a, > > b > >>>>>and >>>>> >>>>> >>>>> >>>>>>>g. >>>>>>> >>>>>>>run the command "iwpriv ath0 mode 0" which puts it in auto >>>>> >>>>>mode..should >>>>> >>>>> >>>>> >>>>>>>be the default..but just to be sure. >>>>>>> >>>>>>>start kismet_server >>>>>>> >>>>>>>At this stage I am having frequent crashes of the machine...no kernel >>>>>>>logs..so might be just PCI issues on my computer. However sometimes > > it > >>>>>runs >>>>> >>>>> >>>>> >>>>>>>for a period of time in which I can see it scan the channel list and >>>>> >>>>>detect >>>>> >>>>> >>>>> >>>>>>>AP's along the way. >>>>>>> >>>>>>>Blaine >>>>>>> >>>>>>>"640K ought to be enough for anybody." - Bill Gates, 1981 >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>>------------------------------------------------------- >>>>>>>This SF.Net email sponsored by: Free pre-built ASP.NET sites > > including > >>>>>>>Data Reports, E-commerce, Portals, and Forums are available now. >>>>>>>Download today and enter to win an XBOX or Visual Studio .NET. >>>>>>> >>>>> >>>>> > http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 > >>>>>>>_______________________________________________ >>>>>>>Madwifi-users mailing list >>>>>>>Mad...@li... >>>>>>>https://lists.sourceforge.net/lists/listinfo/madwifi-users >>>>>> >>> > > |