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Hostapd has a feature where you can connect to its control socket and receive events it generates. Currently we only send commands via this socket. First we open the socket (/var/run/hostapd/<iface>) and send the ATTACH command. This tells hostapd we are ready and after this any events will be sent over this socket. A new API, wait_for_event, was added which takes an event string and waits for some timeout. The glib event loop has been integrated into this, though its not technically async since we are selecting over a socket which blocks. To mitigate this a small timeout was chosen for each select call and then wrapped in a while loop which waits for the full timeout.