wait_for_interface too late - after interface configuration
Peter.Lueg at dsa-ac.de
Tue Aug 14 08:43:26 EDT 2007
I use wpa_supplicant V0.5.7 with a USB WLAN Dongle and WPA PSK.
If I connect the USB Dongle first and then I start the supplicant
everything works fine. But if I start at first the supplicant and then I
connect the USB dongle, the connection to the access points does not
start. The wpa_cli tells me the supplicant is always scanning.
For all tests I use the the wpa_supplicant option -w (wait for interface
If I start the supplicant not as daemon:
wpa_supplicant -d -w -i eth3 -c /etc/wpa_supplicant.conf -D wext
I see, that before the supplicant starts waiting for the interface, the
function wpa_driver_wext_init() is called. This function calls some
ioctl (SIOCSIWMODE, etc ...) to the interface and sets the drv->ifindex.
But at this point the interface is not available and every ioctl fails.
Then I connect the USB Dongle and the supplicant detects it, but then I
see the cyclic message
"Ignore event for foreign ifindex .."
Shouldn't we first check for the presence of the interface, and only
then start configuring it in wpa_driver_wext_init()? What would be the
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