Re: [Qemu-devel] Re: Accepting socket connections in qemu (not the client... the emulator)

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

Hi,

On Tue, 29 May 2007, Clemens Kolbitsch wrote:

> Johannes Schindelin wrote:
> > Hi,
> > 
> > On Tue, 29 May 2007, Clemens Kolbitsch wrote:
> > 
> >   
> > > Clemens Kolbitsch wrote:
> > > 
> > >     
> > > > my virtual device inside qemu (a pci device) is listening for
> > > > socket-(tcp)-connections.
> > > > 
> > > > however, accept() always fails (code works fine if not executed inside
> > > > the qemu-process)... now i'm wondering if qemu interferes somehow...
> > > > 
> > > > is that possible?
> > > > 
> > > > frustrated.... *gg*
> > > > 
> > > >       
> > > ok.... i found an answer to it.
> > > 
> > > obviously, qemu has to handle interrupt-signals (e.g. from its
> > > client-os). this interrupts accepting connections.
> > > 
> > > very bad for me, but at least a logical reason :-/
> > >     
> > 
> > I guess that you use the Slirp device. This device is masqueraded to the
> > outside, so unless you use something different, like VLAN or TAP, you can
> > only make it work using a tunnel.
> > 
> >   
> no... i think you misunderstand...
> 
> I'm trying to accept a socket inside the qemu-emulation-process. not inside
> the simulated operating system.

Ah, sorry.

I cannot think of anything which could trigger that, except what you 
suggested (interrupts are in the way), or maybe timing problems.

Sorry,
Dscho