Re: [Qemu-devel] amd pcnet driver (was Re: qemu and solaris)

[Antony T Curtis <antony.t.curtis@ntlworld.com>]

On Mon, 2004-07-19 at 23:39, Paul Jakma wrote:
> On Mon, 19 Jul 2004, Paul Jakma wrote:
> 
> > - I've had better luck with Andrew's patch to add support for AMD PCNet 
> > emulation (Solaris provides it's own PCNet driver, pcn). This works, and ICMP 
> > between solaris and host works, however I can not telnet or ssh to the host, 
> > nor does DNS work within the host. If i snoop the 'pcn0' interface in 
> > solaris, it prints errors of the form:
> >
> > 	'IP truncated: header missing X bytes'
> >
> > Where X is typically 10, 12,14 or 17. Not had a chance to debug this further.
> 
> Note that packets sent by the qemu host via the pcnet driver and out 
> to the real host appear to be fine. It's packets received by the 
> emulated host which regularly appear corrupted in some indeterminate 
> way (i dont seem to be able to capture the corrupted packets, as seen 
> by the qemu host, with snoop :( - snoop prints errors but i cant get 
> it to actually log the malformed packets :( ).
> 
> I inserted a hex_dump() in pcnet_receive() (just before the 
> PRINT_PKTHDR() define inside #ifdef PCNET_DEBUG_MATCH) and the data 
> logged here matches up exactly with frames captured sent out tun0 by 
> tcpdump on the native host - (presuming the extra 4 bytes logged by 
> pcnet_receive() are valid ethernet CRC trailer - tcpdump doesnt log 
> the CRC), so things are going wrong after the above point AFAICT.
> 
> However, many packets from native host -> emulated host are not 
> received properly, so networking basically is intolerable.
> 
> Unfortunately, I dont know how to debug this further. :(

So this happens only with Solaris? I assume, Solaris x86, what version?

When I have a spare moment, I shall try to install Solaris and
reduplicate this problem.

-- 
Antony T Curtis <antony.t.curtis@ntlworld.com>