RE: [MM] Huawei E1820 and NDISDUP

[Graham Inggs <graham inggs uct ac za>]

> So this particular MAC address firmware issue is related to the
> AT^NDISDUP implementation.  That's a big part of the firmware
> implementation which is never used on Windows and therefore hardly ever
> tested.   So it's not too surprising that it is buggy.

I went back and tested NDISDUP in Windows on two different E1820s with different firmwares; 11.831.03.00.00 
and 11.865.07.00.618.  NDISDUP worked perfectly on both and I noticed that the last two octets of the MAC 
address changed every time the device was detected, but was always 00:1E:10:1F:x:y.

> Another indication that we should ignore the NDISDUP command whenever we
> can, and use the same management protocols the Windows driver uses.

Huawei's Mobile Partner software uses AT commands for everything except establishing a connection on the 
network interface.

Another test I made was to unbind cdc_ether, bind qmi_wwan and then connect with NDISDUP, but the result was 
the same as with cdc_ether and NDISDUP; no traffic would flow unless the MAC was set to 0/1/2/3/4/5.

> Still don't know what that could be on the E3276 though. You have a nice
> project there if you want something harder to work on :) Although I
> believe the NDISDUP implementation on that device is much better.  At
> least it seems to work most of the time.

Would it be possible to push the NDISDUP patches for the E3276 so long?
I think anything would be better than not being able to use the device at all.

> Thanks for all your excellent testing.  This was most useful.  I'll
> submit the necessary patches now.

I saw the patches go through.  Thanks for your work on this.

Instead of blacklisting Huawei modems that support QMI one by one, couldn't this be the default for Huawei 
devices?  In other words, only whitelist ones that don't support QMI?  Otherwise, couldn't we use the 
information from ewnet.inf in the Huawei Windows driver to get a list of all the QMI-supporting devices?
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