Re: [Qemu-devel] Re: NE2000 problem found

[Fabrice Bellard <fabrice@bellard.org>]

Mike Nordell wrote:
> Fabrice Bellard wrote:
> 
> 
>>Can you tell me exactly in which case you have problems with NE2000 ?
> 
> 
> Always? :-)
> 
> On Windows 2000, running Windows 2000 sp4, -pci -cirrusvga.
> 
> It's also the thing that it seems only about every second time networking
> "works", to the extent the guest actually gets a DHCP address. It seems the
> slirp code is indeed getting the request, and is offering an addr, but the
> response is not reaching the guest OS' IP-stack. Whether this is due to the
> guests driver not even getting the interrupt from the virtual NIC, the
> response frame is malformed or <whatever> I haven't yet been able to
> determine. I'm still in the process of adding better tracing, to be able to
> see what happens when.
> 
> After adding the asic writeb I have observed it being written with 0x43
> (just a few times) and 0xff (more times), and only directly after "read
> addr=0x7 val=40". I haven't yet added tracing output of rcnt for writeb, and
> I don't know the significance of this, but I suspect it means something.

Interesting. This problem may really be liked to the WinXP security 
problem I mentionned.

Fabrice.