[SOLVED] Dynamic Network Config

[mk01]

in such setup:

put wlan0 as AUTO
when wlan0 gets connected, ifup will call /etc/network/if-up.d/* scripts. so you don't have tp check, just put your script into this folder and filter your IFACE=wlan0

but if I get it roght: your network adapters are always attached? or wlan0 always is and usb0 is hotplug? then yes, put wlan0 as auto, usb0 as hotplug.

create one upstart job started and stopped on "net-device-added usb0" and "net-device-removed usb0". in pre-start put wlan0 to AP and post-stop wlan0 going from AP to auto. that's all.

if specific firewalling needs to be set, put it into post-start of the usb0 script. and you are done. no cron, just events so minimum workload.