On Sat, 2007-10-20 at 10:21 +0200, dragoran wrote:
> > I don't know why iwl3945 composes the association request on its own
> > and what happens to it later. Besides, mac80211 10.0.0 is something
> > heavily patched by Intel AFAIK. I wanted to test the git version of
> > Intel mac80211, but intellinuxwireless.org appears to be down or
> > unreachable at the moment and I didn't have a recent clone. The
> > kernel mac80211 is definitely not the suspect.
> >
> > I was aware of "error 18", and when I noticed some activity about
> > rates in wireless-2.6/everything, so I decided to see how that problem
> > would be affected.
> >
> does loading the module with disable_hw_scan=1 helps?
Sorry for delay. disable_hw_scan=1 makes no difference for association
requests. However, it has the opposite effect on the probe requests.
With disable_hw_scan=1, probe requests have the same problem as the
association requests, namely they don't have CCK rates in the supported
rates:
IEEE 802.11
Type/Subtype: Probe Request (0x04)
Frame Control: 0x0040 (Normal)
Version: 0
Type: Management frame (0)
Subtype: 4
Flags: 0x0
DS status: Not leaving DS or network is operating in AD-HOC mode (To DS: 0 From DS: 0) (0x00)
.... .0.. = More Fragments: This is the last fragment
.... 0... = Retry: Frame is not being retransmitted
...0 .... = PWR MGT: STA will stay up
..0. .... = More Data: No data buffered
.0.. .... = Protected flag: Data is not protected
0... .... = Order flag: Not strictly ordered
Duration: 0
Destination address: Broadcast (ff:ff:ff:ff:ff:ff)
Source address: IntelCor_c8:77:a3 (00:13:02:c8:77:a3)
BSS Id: Broadcast (ff:ff:ff:ff:ff:ff)
Fragment number: 0
Sequence number: 5
Frame check sequence: 0x53ed0507 [correct]
[Good: True]
[Bad: False]
IEEE 802.11 wireless LAN management frame
Tagged parameters (23 bytes)
SSID parameter set: "WTEST"
Tag Number: 0 (SSID parameter set)
Tag length: 5
Tag interpretation: WTEST
Supported Rates: 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0
Tag Number: 1 (Supported Rates)
Tag length: 8
Tag interpretation: Supported rates: 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 [Mbit/sec]
Extended Supported Rates: 1.0 2.0 5.5 11.0
Tag Number: 50 (Extended Supported Rates)
Tag length: 4
Tag interpretation: Supported rates: 1.0 2.0 5.5 11.0 [Mbit/sec]
What's even worse, the radiotap header (I'm capturing with the current
MadWifi) indicates that the probe request is sent at 6 Mbps. Of course,
the AP doesn't reply, as it's 802.11b only.
Association requests are sent at 5.5 and 6 Mbps. The association
response is sent, but it's still code 18.
I'm using current wireless-2.6/everything now (it identifies itself as
2.6.24-rc1) and the driver from the kernel to avoid any problems with
Intel's mac80211.
--
Regards,
Pavel Roskin
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