Patch is attached. Hope this helps
Ky Srinivasan wrote:

Thanks Ben. I would be interested in the patch.
K. Y

On Wed, Aug 8, 2007 at 2:42 PM, in message <46BA0E9B.6020305@xxxxxxxxxxxxxxx>,

Ben Guthro <bguthro@xxxxxxxxxxxxxxx> wrote:

There is a CRC bug in the RTL8139 implementation in the QEMU used in 3.1
There have been discussions of this on the QEMU list, as well.

We have a patch for 3.1, but have not ported it forward to unstable yet, since unstable is using a newer version of QEMU.

If there is interest in seeing the 3.1 patch, I'd be happy to post it.
Ky Srinivasan wrote:

I am having networking issues on fully virtualized Vista. Is this a known

issue.

K. Y
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diff -r 05858d742ba7 tools/ioemu/hw/rtl8139.c
--- a/tools/ioemu/hw/rtl8139.c Wed Jul 18 10:46:24 2007 -0400
+++ b/tools/ioemu/hw/rtl8139.c Wed Jul 18 10:46:30 2007 -0400
@@ -55,7 +55,7 @@
 
 /* RTL8139 provides frame CRC with received packet, this feature seems to be
 ignored by most drivers, disabled by default */
-//#define RTL8139_CALCULATE_RXCRC 1
+#define RTL8139_CALCULATE_RXCRC 1
 
 /* Uncomment to enable on-board timer interrupts */
 //#define RTL8139_ONBOARD_TIMER 1
@@ -1032,7 +1032,7 @@ static void rtl8139_do_receive(void *opa
 
 /* write checksum */
 #if defined (RTL8139_CALCULATE_RXCRC)
- val = cpu_to_le32(crc32(~0, buf, size));
+ val = cpu_to_le32(crc32(0, buf, size));
 #else
 val = 0;
 #endif
@@ -1138,7 +1138,7 @@ static void rtl8139_do_receive(void *opa
 
 /* write checksum */
 #if defined (RTL8139_CALCULATE_RXCRC)
- val = cpu_to_le32(crc32(~0, buf, size));
+ val = cpu_to_le32(crc32(0, buf, size));
 #else
 val = 0;
 #endif

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