I have a scenario here in which I use the Atheros card with madwifi driver
together with quagga routing daemon. I have peer-to-peer links established.
Quagga needs to now the status of the interface to properly handle routing.
If a link is not established, the interface has to be marked as inactive or
something similar. There exist several Netlink states which you can use. The
message NO_CARRIER seems to meet the requirement. In the background the card
has to send beacons and when the beacons are properly answered the link
should be set up again.
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