From: "John R. Hogerhuis" <jhoger@pobox.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] about DHCP server in qemu
Date: Fri, 30 Sep 2005 11:28:53 -0700 [thread overview]
Message-ID: <1128104933.2390.42.camel@aragorn> (raw)
In-Reply-To: <20050930131014.GA14173@jbrown.mylinuxbox.org>
On Fri, 2005-09-30 at 09:10 -0400, Jim C. Brown wrote:
> On Fri, Sep 30, 2005 at 10:17:04AM +0200, octane indice wrote:
> > > I don't see any way for qemu guests to be able to
> > > ping each other
> > > (for example) if they are both using user-net.
> > >
> > it would be good to get that working :)
> >
>
> Alas, that is so difficult it is nearly impossible.
>
Nearly? Oh come on... you know it ain't possible, period.
Ping (ICMP) operates at the IP level. An unprivileged socket, which is
what user-net (slirp) uses can only send/receive packets at the ported
protocols level, which means UDP or TCP.
Of course, why ping? If all you need to do is validate connectivity,
find some ported protocol service to connect to in order to validate
connectivity.
If non-ported protocols like ICMP must be supported use tun/tap.
-- John.
next prev parent reply other threads:[~2005-09-30 18:51 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-29 15:00 [Qemu-devel] about DHCP server in qemu octane indice
2005-09-29 20:34 ` Jim C. Brown
2005-09-29 21:50 ` Brad Campbell
2005-09-29 22:14 ` Jim C. Brown
2005-09-30 8:17 ` octane indice
2005-09-30 12:21 ` Oliver Gerlich
2005-09-30 13:10 ` Jim C. Brown
2005-09-30 14:51 ` octane indice
2005-10-01 21:17 ` Jim C. Brown
2005-10-02 2:39 ` Henrik Nordstrom
2005-10-02 19:23 ` Jim C. Brown
2005-10-03 11:34 ` octane indice
2005-09-30 18:28 ` John R. Hogerhuis [this message]
2005-09-30 21:37 ` Henrik Nordstrom
2005-09-30 21:59 ` Jim C. Brown
2005-10-03 15:55 ` octane indice
2005-10-03 18:12 ` Henrik Nordstrom
2005-10-03 19:20 ` Christian MICHON
2005-10-03 20:37 ` Henrik Nordstrom
2005-10-04 7:47 ` Christian MICHON
2005-10-04 11:43 ` Jim C. Brown
2005-10-05 9:38 ` Henrik Nordstrom
2005-10-03 21:31 ` Jim C. Brown
2005-10-04 4:19 ` octane indice
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