tree 10c09efd3d3c7a8ea913e7e7bc38d2f8547c703a
parent a5e81ba9eb8c44d9ed6212d4fd75600b5c896ecf
author Michael Braun <michael-dev@fami-braun.de> 1428670188 +0200
committer Jouni Malinen <j@w1.fi> 1428928316 +0300

vlan: Ignore DELLINK on interfaces that exists

When hitting
> Failed to create interface wlan3.1: -23 (Too many open files in system)
> Try to remove and re-create wlan3.1
hostapd deletes the AP_VLAN interface and then recreates it. Thus the
kernel assigns the same ifidx to the new interfaces and sends DELLINK
and NEWLINK mesages.

As the DELLINK messages are processed after the struct hostapd_vlan is
added, hostapd deletes the struct hostapd_vlan entry, deconfigures the
AP_VLAN interface and leaves vlan_newlink nothing to find afterwards.

So this patch makes DELLINK messages to be ignored when the interface
exists.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>