tap-linux: Open ipvtap and macvtap

ipvtap and macvtap create a file for each interface unlike tuntap, which
creates one file shared by all interfaces. Try to open a file dedicated
to the interface first for ipvtap and macvtap.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
1 file changed