On Mon, Jun 6, 2011 at 11:20 AM, Piotr Kaczorek <piotrkaczo...@bluetrace.eu> wrote: > W dniu 05.06.2011 21:13, Bob Copeland pisze: >> On Fri, May 27, 2011 at 5:27 AM, Piotr Kaczorek >> <piotrkaczo...@bluetrace.eu> wrote: >>> Sorry, I pressed reply instead of reply all. >>> >>> W dniu 26.05.2011 14:56, Bob Copeland pisze: >>>> Please don't top-post. >>>> >>>> On Thu, May 26, 2011 at 2:48 AM, Piotr Kaczorek >>>> <piotrkaczo...@bluetrace.eu> wrote: >>>>> It seems to me i'ts ath5k issue. >>>>> >>>>> Since I started this thread I've tried few more chipsets: >>>>> VIA (vt6655) - has problems with sending packets, sometimes they are >>>>> 'broken'. Most images don't reach mobile phone correctly. >>>>> Ralink (rt2561t - rt61pci driver) - works correctly (and also uses >>>>> nl80211). Range is poor - maybe it's a matter of hardware i've bought. >>>>> Prism (ISL3886 - p54 driver) - works corretly (and also uses nl80211). >>>>> >>>>> But thanks for pointing this out. It might be issue with ath5k<-> >>>>> nl80211 cooperation, as well. >>>>> Should I post a bug on kernel's bugzilla? >>> I attach gziped packet dumps (hope it will work - I'm using mailing lists >>> for the first time). >>> There are two cap files - one from my SE P1i (on which requests work as they >>> should), and one from BB Curve 8520 (on which I can associate but can't open >>> website). Both contain association, and two requests to 'made up' url's. >>> All requests should respond with the same content as my setup is quite >>> untypical - requests are intercepted with iptables, and static website >>> placed on hotspot is served in response to any request. There is also >>> dnsmasq responding with my hotspot's IP to all DNS queries. >> Well, one thing missing in both of these captures is beacons which are >> kind of important since they have the traffic indication maps. The BB >> is sending the correct AID for PS-poll requests. I do see some >> successful PS-polls like packet #3089-3091 - where the AP delivers an >> arp reply. >> >> I'll keep looking for some discrepancy but it would help if we could get >> a capture with beacons. FWIW, I've attached the script I use to collect >> data -- not perfect and may need some tweaking for different setups, but >> it grabs a lot of useful data: >> >> - monitor mode captures from both the sta and the secondary card >> - dmesg, preferably with mac80211 debugging on >> - tracepoints from ath5k and mac80211 (must have enabled them in >> kernel config and have added ath5k_trace.py[1] to >> ~/.trace-cmd/plugins/) >> >> Once you start setup.sh then you need to associate with the AP in the >> usual way (script assumes they live on channel 11) and it grabs 5 minutes >> of data or until you ctrl-c it. >> >> [1] http://bobcopeland.com/srcs/ath5k_trace.py >> > This script should be run on my hotspot or on 'external sniffer' (e.g. > my laptop)? What does it require? I get: > File "ath5k_trace.py", line 1, in <module> > import tracecmd > ImportError: No module named tracecmd > What setup.sh are you writing about?
setup.sh was attached to the email. I run it on my laptop. I mostly use this script for debugging STA issues, so in my case I get a capture from ath5k acting as a STA, and a USB ar9170 on the same machine to act as the external sniffer. Since you are interested in ath5k as an AP, some things would have to change (e.g., I wouldn't bother with a monitor mode capture on the AP, but it might be worthwhile to get the driver trace) -- you could do something like connect both the laptop and the hotspot via the wired interface and start/stop the driver trace via ssh. ath5k_trace.py needs to be added to ~/.trace-cmd/plugins/ and run via trace-cmd, not directly (as invoked by setup.sh). It extracts data from the ath5k tracepoints and writes out a pcap file and some general debugging info. YMMV - this is just an example of the kind of data I collect for my own debugging. -- Bob Copeland %% www.bobcopeland.com _______________________________________________ ath5k-devel mailing list ath5k-devel@lists.ath5k.org https://lists.ath5k.org/mailman/listinfo/ath5k-devel
