Hi,
On Mon, 19 Jul 2010, Bob Copeland wrote:
On Mon, Jul 19, 2010 at 12:35 AM, Jonathan Guerin <jonathan@xxxxxxxxxxxx> wrote:
Hi,
I'm trying to get my wireless nodes to associate in ad hoc mode.
[[[snipped]]]
$ su
# modprobe -r ath5k
# modprobe ath5k
# iw dev wlan0 set type ibss
# ifconfig wlan0 192.168.10.1 up
# iw dev wlan0 ibss join myibss 2462
Then on the other machine (Vista) I just located 'myibss' (so beacons
are working) and selected it, then successfully pinged 192.168.10.1.
Wrong.
If the other machine located your node, then one of the four statements
is true:
a)beacons are working
b)probes are working - which means a scan is happening.
c)beacons and probes are working
d)beacons and probes are not working. The vista machine saw a data
packet, and sent a probe request, which your machine answered.
My colleague here did some work with a slightly older kernel.
He found that the association process worked sometimes - not always.
There was a time dependency - both nodes have to go through this at the
same time.
Further - scans - it seems that nodes have to scan to find things.
Old information in the mac80211 has to be expired and removed.
A scan should not be necessary - if both ends are put on channel 2462- a
scan should not be required - there is no channel changing. Yet - my
colleague noted a scan helped nodes to associate.
I would say this:::
I cannot deduce what is happening from the initial posters report. I
need a packet dump of the beacons/probes and all the other packets on the
air.
Cheers,
Derek.
--
Derek Smithies Ph.D.
IndraNet Technologies Ltd.
ph +64 3 365 6485
Web: http://www.indranet-technologies.com/
"How did you make it work??"
"Oh, the usual, get everything right".
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