Re: [Qemu-devel] Win32 usermode only network possible? [was: multiple VMs]

From: Joe Batt <Joe@soliddesign.net>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Win32 usermode only network possible? [was: multiple VMs]
Date: Wed, 07 Apr 2004 17:16:23 -0500	[thread overview]
Message-ID: <1081376183.12574.53.camel@localhost> (raw)
In-Reply-To: <1081375468.14275.33.camel@aragorn>

When NATing, you don't have to match the original source port, so we
should be able to have a NAT run in a non root mode (if source port <
1024, use a different source port).

Before I spent so much time looking for it today, I would have expected
that there was a userspace NAT program available (something that spoke
the TUN stream format perhaps), but I didn't see anything.  (TUN stream
format would have been cool, because it QEMU already speaks that, but it
would have been slower.)  I would expect the TCP packet to TCP socket
mapping to be the hard part.  UDP should be easy.

Wont we also need a customized DHCP server to server up IP addresses and
DNS servers?

I would think that the goal is that you can 'qemu -hda somepartition' or
'qemu -cdrom someiso' and have a running NATed machine without any host
configuration.

Joe

On Wed, 2004-04-07 at 17:04, John R. Hogerhuis wrote:
> On Wed, 2004-04-07 at 13:10, Fabrice Bellard wrote:
> > I like very much the idea of enabling network use without any priviledge 
> > rights for Linux and win32. I have looked at the SLiRP code and it seems 
> > easy to do (at least for Linux, for win32 I have not looked how to do 
> > that with the SDL event loop).
> > 
> > Expect this feature to come in the next few days :-)
> > 
> 
> Cool! The win32 side shouldn't be that difficult since sockets under
> win32 isn't all that different.
> 
> Anyway the way you decribe it the strategy should work under Win32 as
> long as you don't use raw sockets since those are priviledged.
> 
> 
> A SOCKS proxy would allow two way communication since it allows creation
> of listening sockets. But it requires configuration of the clients so
> it's not zero-install. Its other advantage is that it would not require
> priviledged access to the host. Most important networks apps are
> socksified and the setup is very easy (tell the app to use a certain
> socks server IP).
> 
> 
> -- John.
> 
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