Re: [zd1211-devs] zd1211rw encryption problems

2006-09-05 Thread Remco
(I noticed I still had this mail sitting in my queue. It's the result of some 
minimal testing. I hope it's not old news. BTW I'm temporarily no longer in 
possession of a zd1211 device so I can't try out anything for now)

  Any testing appreciated: does zd1211rw work with your ZD1211B device
  when connecting to encrypted networks? (remember to test more than just
  associating...)

 ... With linux-2.6.18-rc1 / wpa_supplicant 0.4.8 (no patches) ...

 Once there is a connection it seems stable, getting connected seems to be
 the problem. Unfortunately I haven't spotted any failures in the logs so
 far.


I do not recall any connection failures anymore using linux-2.6.18-rc4 / 
wpa_supplicant 0.4.8.

I decided to use netio to get an impression of the performance.
The (maximum) performance seems to be half of that of the vendor driver.
(~1.3 MB/s - ~2.5 MB/s)

One thing that caught my eye was that Tx defaulted to ~1Mb/s and Rx seemed to 
adapt to the maximum speed possible.
I was able to change Tx with iwconfig. However there seem  to be circumstances 
where Tx falls back to its lowest setting and I've been unable to get it back 
to a higher rate without a reboot. (init 2 / init 3 seem to trigger this, but 
restarting the network might do it as well. I didn't observe anything strange 
in the logs)


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Re: [zd1211-devs] zd1211rw encryption problems

2006-07-18 Thread Remco
 Any testing appreciated: does zd1211rw work with your ZD1211B device
 when connecting to encrypted networks? (remember to test more than just
 associating...)

I have/had all the described problems with a ZD1211. With linux-2.6.18-rc1 / 
wpa_supplicant 0.4.8 (no patches) things seem to have improved a bit.

What follows is just user experience, I just hope there's something useful in 
it.

So far I've been able to make a working connection and do a FTP transfer 
multiple times using WPA / DHCP. Sometimes I need to initially setup the 
connection, by stopping/starting wpa_supplicant/dhclient or even stop 
dhclient / wpa_supplicant / rmmod zd1211rw / modprobe zd1211rw / start 
wpa_supplicant / dhclient to work around association timeouts.

Once there is a connection it seems stable, getting connected seems to be the 
problem. Unfortunately I haven't spotted any failures in the logs so far.

Initially it seemed only possible to create a connection successfully by 
having only one network configuration enabled in wpa_supplicant.conf. 

Re-testing shows that even multiple enabled networks in wpa_supplicant.conf 
seem to work, though it worked only once so far. Multiple networks seem a 
cause for trouble. If I enable two networks, and the AP-s for both are up, I 
notice what looks like two authentication/association attempts going on at 
the same time. Multiple enabled networks seem to interfere with each other 
somehow, though not all the time.

Maybe, whatever causes the disturbance, also causes connection problems with 
iwconfig connections.


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Re: [zd1211-devs] zd1211rw encryption problems

2006-07-18 Thread Daniel Drake
Remco wrote:
 I have/had all the described problems with a ZD1211. With linux-2.6.18-rc1 / 
 wpa_supplicant 0.4.8 (no patches) things seem to have improved a bit.
 
 What follows is just user experience, I just hope there's something useful in 
 it.

OK, yours seems to be different problem then. Well, at least a complete 
blindness to data packets is off the cards.

I still suspect it might be wpa_supplicant confusing us - softmac still 
isn't great at handling iwconfig ioctl's in quick succession. Joe Jezak 
is working on this, maybe that has helped.

I have half-fixed my ZD1211B problem in my tree: I can now connect (and 
send data to/from) unencrypted networks. I don't think encryption is 
working yet, I need to double check that though...

Daniel

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Re: [zd1211-devs] zd1211rw encryption problems

2006-07-16 Thread Daniel Drake
Grr.. I can't get my ZD1211B connecting to unencrypted networks and 
don't have any logs showing it ever worked. I must have made a mistake 
in my earlier analysis (left the ethernet cable in or something!) -- I 
am no longer sure that this is a bug related to packets encrypted in 
software.

rello wrote:
 So no SoftMac in next driver relase?

??

 OK in 2/3 days I'll finish my exams and I can come back testing new
 driver relases both on PPC and x86 machines.
 Hardware encryption modifications will be still applied to the main
 wireless kernel tree or you'll relase some patches?

They will go into the out-of-tree git repositories controlled by myself 
and Ulrich. I will send patches onto John when ready, who will send them 
on to Jeff who will send them on to Linus :)

Daniel



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[zd1211-devs] zd1211rw encryption problems

2006-07-15 Thread Daniel Drake
Hi,

I think I have an explanation for the unresolved zd1211rw failure 
reports (rello, remco, a couple of others) that are floating around.

With zd1211rw, my ZD1211B device cannot connect to my network when 
encryption is enabled. Well, it can associate, but data tx/rx does not 
work. The vendor driver works OK. Remember that zd1211rw does all 
encryption and decryption in software (for now), whereas the vendor 
driver does it all in hardware.

My other device (an original ZD1211) works fine, but I'm not so sure 
that this is a ZD1211 vs ZD1211B thing.

I investigated the problem with my ZD1211B. The software-encrypted frame 
is being sent, is being acknowledged, and encrypted data frames are sent 
in response. However, the ZD1211B does not see the ACK (gives me a 
retry failed interrupt), and does not see any of the response frames (at 
least does not upload them to the host in any way).

The reason that association works (which obviously involves frame 
exchage) is because management frames are unencrypted. Also, connecting 
to unencrypted networks works just fine.

I have emailed a detailed report to ZyDAS. I don't think they will do 
anything with it. The best approach to solving this is for us to do 
encryption/decryption in hardware, which is done simply by uploading the 
keys to the device and marking non-management frames to be encrypted (I 
think) -- any volunteers? ;)

Any testing appreciated: does zd1211rw work with your ZD1211B device 
when connecting to encrypted networks? (remember to test more than just 
associating...)

Daniel


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Re: [zd1211-devs] zd1211rw encryption problems

2006-07-15 Thread rello
Daniel Drake wrote:
 I have emailed a detailed report to ZyDAS. I don't think they will do 
 anything with it. The best approach to solving this is for us to do 
 encryption/decryption in hardware, which is done simply by uploading the 
 keys to the device and marking non-management frames to be encrypted (I 
 think) -- any volunteers? ;)

   


So no SoftMac in next driver relase?


 Any testing appreciated: does zd1211rw work with your ZD1211B device 
 when connecting to encrypted networks? (remember to test more than just 
 associating...)

 Daniel
   

OK in 2/3 days I'll finish my exams and I can come back testing new
driver relases both on PPC and x86 machines.
Hardware encryption modifications will be still applied to the main
wireless kernel tree or you'll relase some patches?

www.rello.it





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