[Qemu-devel] [Bug 589564] Re: Windows host tap (tap-win32) is not working on QEMU ver 0.12.X

[Ibrahim Umar]

KP. Kang fix is working. But Lode Leroy fix is a more proper approach.

I have tested the patch and confirm that the problem is now fixed using
the provided patch.

-- 
Windows host tap (tap-win32) is not working on QEMU ver 0.12.X
https://bugs.launchpad.net/bugs/589564
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.

Status in QEMU: New

Bug description:
To reproduce the bug: 

1) Install tap driver from openvpn (either v8/v9). Rename the tap connection to 
"mytap" and set the IP to 192.168.1.1 (or any ip)

2) use any QEMU 0.12.X and issue the following command 

c:\qemu> qemu -net nic -net tap,ifname=mytap -cdrom ../linux.iso

3) Inside linux guest system, set the ip of the nic

# ifconfig eth0 192.168.1.2

4) In the windows host try to ping the linux guest (or the other way around, 
after you disable the windows firewall)

c:\qemu> ping 192.168.1.2
Pinging 192.168.1.2 with 32 bytes of data:
Reply from 192.168.1.1: Destination host unreachable.

Those above steps is not working on QEMU 0.12.X. But confirmed working (ping 
successful) on:
- QEMU 0.9.X
- QEMU 0.10.X
- QEMU 0.11.X

I have tried with windows XP and windows 7 host system. I haven't tried the 
qemu latest from git repository, but looking at the "net/tap-win32.c" revision 
date, I guess the bug has been around for a while.

Thanks.