Date: Sun, 27 Apr 2008 11:51:20 +0800 From: "Sepherosa Ziehau" <sepherosa@gmail.com> To: freebsd-net <freebsd-net@freebsd.org> Cc: Kevin Lo <kevlo@freebsd.org> Subject: Re: Connecting P1i to FreeBSD Message-ID: <ea7b9c170804262051q4768244blbb4e93381c9a903d@mail.gmail.com> In-Reply-To: <fv0f8c$f3$1@ger.gmane.org> References: <fur5qu$u5i$1@ger.gmane.org> <ea7b9c170804242354g56983458i5a1461ca9d18a015@mail.gmail.com> <fv0dmo$squ$1@ger.gmane.org> <fv0f8c$f3$1@ger.gmane.org>
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On Sun, Apr 27, 2008 at 7:52 AM, Ivan Voras <ivoras@freebsd.org> wrote:
> Ivan Voras wrote:
>
> > Sepherosa Ziehau wrote:
> >
> >
> > > Are you sure that your device works under IBSS mode?
> > >
> >
> > Yes, since Windows doesn't support creating an AP from the card, and it
> connects to Windows. Unless there are other modes that can do the same
> thing...
> >
>
> Actually there is a difference; here's a dump from laptop where the device
> connects to the Windows machine:
>
> 23:49:18.013539 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:18.045340 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:18.148408 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:18.374477 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:18.377198 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:18.379066 Probe Response (SpeedTouch425488) [1.0* 2.0* 5.5* 11.0*
> 18.0 24.0 36.0 54.0 Mbit] CH: 6, PRIVACY
> 23:49:18.659907 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:18.734842 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:18.762218 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:19.005423 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:19.008301 Probe Response (SpeedTouch425488) [1.0* 2.0* 5.5* 11.0*
> 18.0 24.0 36.0 54.0 Mbit] CH: 6, PRIVACY
> 23:49:19.026747 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:19.366882 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:19.376645 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:19.411652 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:19.636460 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:19.637575 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:19.888667 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:19.990770 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:19.997530 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:20.268038 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:20.269293 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:20.271670 Probe Response (SpeedTouch425488) [1.0* 2.0* 5.5* 11.0*
> 18.0 24.0 36.0 54.0 Mbit] CH: 6, PRIVACY
> 23:49:20.274467 Beacon (SpeedTouch425488) [1.0* 2.0* 5.5* 11.0* 18.0 24.0
> 36.0 54.0 Mbit] ESS CH: 6, PRIVACY
> 23:49:20.297986 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:20.492967 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:20.502751 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:20.629491 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:20.707738 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:20.899123 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:20.901458 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:20.989459 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:21.124700 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:21.219413 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:21.259747 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:21.321793 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
> 23:49:21.530624 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:21.531691 Probe Response (A2) [1.0* 2.0* 5.5* 11.0* Mbit] CH: 6,
> PRIVACY
> 23:49:21.533326 Probe Response (SpeedTouch425488) [1.0* 2.0* 5.5* 11.0*
> 18.0 24.0 36.0 54.0 Mbit] CH: 6, PRIVACY
> 23:49:21.833759 Beacon (A2) [1.0* 2.0* 5.5* 11.0* Mbit] IBSS CH: 6, PRIVACY
>
> I didn't get the "Beacon" entries before. I expected to see actual data
> packets in tcpdump, but I assume they are not in the dump because we're only
> looking at the 802.11 events with -y ieee802_11?
>
I think you are using iwi to do the tap, could you put iwi into
monitor mode, since iwi is "smart" device which may filter certain
type of frames in non-monitor mode?
I tested my rum: the beacon template set in the hardware is trashed in
a strange a pattern
What I got in the air; fc duration and certain part of mac address is trashed:
11:04:57.256700 Assoc Request (sephe-adhoc) [1.0* 2.0* 5.5* 11.0* 6.0
9.0 12.0 18.0 Mbit]
0x0000: 0000 2a01 0032 0430 4860 6c18 f32f 077a
0x0010: 4e9c 3b6a eb9f b01d afbe e402 0000 0000
0x0020: 6400 2200 000b 7365 7068 652d 6164 686f
0x0030: 6301 0882 848b 960c 1218 2403 0101 0602
0x0040: 9056 e96b 88d0 f6ef 5cc9 1d
The actual beacon mbuf content:
80 00 00 00 ff ff ff ff ff ff 00 18 f3 2f 07 7a
4e 9c 3b 6a eb 9f 00 00 00 00 00 00 00 00 00 00
64 00 22 00 00 0b 73 65 70 68 65 2d 61 64 68 6f
63 01 08 82 84 8b 96 0c 12 18 24 03 01 01 06 02
00 00 2a 01 00 32 04 30 48 60 6c
After several small code change, I found that beacon template size
can't exceeds 64bytes. Small template space means you could only use
rum IBSS in 11b mode. I have tried to setup BEACON_BASE1 but without
result. If it is not a hardware design flaw then we will need data
sheet to make it correct.
Best Regards,
sephe
--
Live Free or Die
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