Subject: Re: kern/35196: sockets should die if addresses vanish
To: None <gnats-bugs@NetBSD.org>
From: Manuel Bouyer <firstname.lastname@example.org>
Date: 12/07/2006 22:36:32
On Thu, Dec 07, 2006 at 02:30:08PM +0000, Perry E. Metzger wrote:
> > And not necessarily unstable; not so long ago most ADSL ISPs in France
> > used to disconnect people after 24h. It was a pain for Windows users,
> > that OS being one that does what Perry wants.
> Well, as I said, we could always make the behavior sysctl'able so you
> could pick based on your usage pattern.
> For my usage, I'm constantly opening up my laptop and acquiring a new
> address when I arrive somewhere. Generally, I then have all these
> connections that were active when I was at my last location some hours
> earlier that are now dead, and yet which now are around and sending
> out packets that can never be replied to.
> In addition to the possibility of a sysctl for the behavior, here is
> another idea: perhaps if you no longer have the origination address
> bound to any interface, you drop the packets you would otherwise send
> out from earlier connections rather than sending them out on an actual
> network. Then, if you get the address back, you can stop dropping
> them. This surely will cause no one any inconvenience, since those
> packets could never be replied to. It will not, however, be an optimal
> solution from my point of view...
If your problem is that the system sends packets that could be seen as
spoofed, then yes it's an acceptable solution.
Manuel Bouyer <email@example.com>
NetBSD: 26 ans d'experience feront toujours la difference