ifup ifdown example

[David Lamparter]

On Thu, Feb 17, 2011 at 10:07:03PM -0800, Reuben Hawkins wrote:
> Hi,
> 
> Is there a simple example showing how to figure out if/when network
> interfaces are up/down or change state?  Can that be done with libnl?

Yes, that can be done with libnl. Look at src/nl-monitor.c, that tells
you how to create a netlink multicast listener. You may need to add
some code to filter out the events you want to trigger on; if your
application is simple you can as well just "reevaluate" things without
looking at the message you received.


-David

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