Jouni Malinen wrote:
On Tue, Jan 17, 2006 at 01:05:16PM +0100, Jiri Benc wrote:
On Mon, 16 Jan 2006 19:07:51 -0800, Jouni Malinen wrote:
Actually, there is a use for the master device. It can be used to
monitor what is going on over the radio from all virtual APs/STAs, e.g.,
by running Ethereal on it.
You can add a new "soft" monitor interface and use it instead. There is
no need for separate master device.
Sure, you can do it that way, too. However, this is not the only use. I
just remembered another one: QoS. Devicescape 802.11 code uses a qdisc
on the master interface to take care of determining which hardware TX
queue to use with WMM (which uses four different TX queues).
With fullmac devices the master interface makes no sense, it cannot be
used for neither the sniffing or QoS. The design where the master device
is something else than net_device is cleaner, it treats both soft/fullmac
devices equaly, without need to special-case one of them.
Feyd
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