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SubjectRe: tcp/ip connect on demand

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.


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