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[Qemu-devel] Re: [PATCH] Add pcap-based host network bridge

From: Sebastian Herbszt
Subject: [Qemu-devel] Re: [PATCH] Add pcap-based host network bridge
Date: Tue, 12 May 2009 23:17:06 +0200

Jan Kiszka wrote:
Sebastian Herbszt wrote:
Anthony Liguori wrote:
Jan Kiszka wrote:
Well, in case we do not find a workaround for host<->guest
communication, would the patch remain unacceptable even with proper,
prominent documentation of this shortcoming?

What's the use-case you're trying to address?  Who do you expect to
use this functionality?

Setting up bridging isn't really that bad on Linux.  Is this primarily
targeted at Windows?  libpcap requires a kernel driver on Windows so I
don't know that I believe it's a great general solution for Windows

I would really like to see pcap support in mainline (even as a windows only
feature). Qemu networking with pcap is trivial on windows. No need to
configure tap bridges, but just specify "ifname" and there you go.

We basically dropped the idea as it turned out that - at least under
Linux - there is no host<->guest link realizable with reasonable effort.

That's really too bad. pcap-based networking works flawless on windows.
Guest <-> host and guest <-> world communication works just fine.
According to the previous threads about pcap-based networking it also
should work fine on FreeBSD.

- Sebastian

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