[Winpcap-users] Problems with running WinPCap on a virtual PC

[Mark Pizzolato - WinPCap-Users]

Hi Jens,

>From what you describe below your VM running under Virtual PC is running XP.  That VM has 2 Network interfaces configured on it.  One using NAT and the other "Bridged" to the LAN the remote micro-controller device.  

What you are seeing is a 'feature' of the Virtual PC environment's Bridging/Switch Emulation.  It does NOT allow arbitrary MAC addresses to be passed back to the Virtual Device.  The only MAC address that will pass inward is the MAC address of the virtual NIC.  You can determine what this MAC address is by looking at the output of an "IPCONFIG/ALL".  Under the interface in question the MAC address will be listed as the 'Physical Address'.

If you have your application use the physical MAC address packets should pass.

Alternatively, you could setup a different VM environment using Oracle VirtualBox.  Install an XP environment on that VM and configure the NIC (on the VirtualBox side).  Set the NIC to Bridged Adapter bridged with the appropriate LAN interface.  Click on the Advanced link in the settings tab and change the Promiscuous Mode setting to "Allow All".

Good Luck.

- Mark Pizzolato

On Thursday, November 03, 2011 at 3:13 PM, Jens Munk wrote:
> Carlos, Mark,
> 
> Sorry about that. The host PC is a Windows 7 64 bit professional, and the
> virtualization is Microsoft's Windows Virtual PC with WinXP. More specifically,
> it is the "Windows XP Mode with Virtual PC" package you can download
> directly from Microsoft:
> 
> http://www.microsoft.com/windows/virtual-pc/download.aspx
> 
> MAC addresses of virtual and physical network adapters: I was unaware that
> they would be different, and I would have to investigate this.
> However, should the virtualization machine take care of this?
> 
> Thanks again. I really hope you can help me with this one,
> 
> Jens.
> 
> 
> Jens,
> what virtualization engine are you using to run the VM ?
> 
> -Carlos
> 
> 
> On 11/2/2011 11:29 PM, Mark Pizzolato - WinPCap-Users wrote:
> > Hi Jens,
> >
> > You fail to mention the what OS the host is running, AND what
> Virtualization software you are using.   You also don't mention what MAC
> address you are using as the source MAC address in your outgoing packets.
> Specifically, is the source MAC address being used the same as the MAC
> address which the virtual network adapter is using?
> >
> > Provide details and I'll try to explain what is happening and what you may
> need to do.
> >
> > - Mark
> >
> > On Wednesday, November 02, 2011 at 3:19 PM. Jens Munk wrote:
> >> Hey,
> >>
> >> I am trying to run my application, that is using WinPCap to send and
> >> receive raw ethernet messages, on a virtual WinXP. The messages get
> >> send OK, but the incoming messages never get to the virtual WinXP and
> >> thus my application. This is confirmed by WireShark. Likewise running
> >> WireShark on the host shows that the incoming messages are present
> there.
> >>
> >> So how do I get this to work, i.e. get incoming raw messages all the
> >> way back to the virtual machine?
> >>
> >> Some info on my setup: The PC has two adapters: One for the company
> >> and internet and one for this purpose (I am communicating with the
> >> micro- controllers). The first adapter is set as "Shared networking
> >> (NAT)" and works fine on the internet. The other one and the one I
> >> want to use for this is set as its name.
> >>
> >> Thanks,
> >>
> >> Jens.
> >
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