At least on NetBSD with the ath driver, it is impossible to change the
channel when the interface is in monitor mode (actually it is possible,
but when the interface is turned up again the channel is set back to its
prior value).
Therefore, to set the interface in monitor mode on a given channel, we
must:
- shut down,
- switch to managed mode (media autoselect) with the wanted channel,
- turn up,
- shut down again,
- switch to monitor mode,
- turn up again.
I implemented the same behaviour for Linux, maybe it's useless but it
can't hurt.
Matteo Cypriani
9a5853d48a