Re: tcp/ip connect on demand

[H. Peter Anvin]

Jan Engelhardt wrote:
> On Thursday 2008-07-03 20:28, H. Peter Anvin wrote:
> > Jens-Michael Hoffmann wrote:
> > > hi,
> > >
> > > what is the right way to implement a "connect on demand" feature?
> > > Example: user types url in firefox and presses return. Then
> > > the system should set up network devices and proceed as usual.
> > >
> > > Is there a hook in the kernel we can use?
> > In the kernel, no.  Nor do you need one; the best place to hook into this is
> > probably the name service system (so you catch it on trying to look up
> > hostnames.)
> >
> > Alternatively, you can set up a bridge device which you can listen to via a tap
> > device; when you see traffic, you bring up the real network and attach it to
> > the bridge.
>
> There is on-demand for PPP devices; though that is probably specific
> to PPP.

Yes, those monitor traffic at the PPP device port, I believe.

	-hpa
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