[PATCH 1/4] hostapd: add config option for dfs channels

[Simon Wunderlich]

Hello Helmut,

> On Wed, Feb 5, 2014 at 6:10 PM, Simon Wunderlich <sw at simonwunderlich.de> 
wrote:
> > From: Simon Wunderlich <siwu at hrz.tu-chemnitz.de>
> > 
> > Different channels allow different transmission power, at least in ETSI
> > countries. Also, ETSI requires a "channel plan" for DFS operation, and
> > channels should be randomly choosen from these channels.
> > 
> > Add a channel list configuration option for users to add channels
> > hostapd may pick from.
> > 
> > Signed-hostap: Simon Wunderlich <sw at simonwunderlich.de>
> > ---
> 
> [...]
> 
> > diff --git a/hostapd/hostapd.conf b/hostapd/hostapd.conf
> > index da7817f..7591663 100644
> > --- a/hostapd/hostapd.conf
> > +++ b/hostapd/hostapd.conf
> > @@ -140,6 +140,12 @@ channel=1
> > 
> >  # Defaults:
> >  #acs_num_scans=5
> > 
> > +# DFS Channels. This option allows hostapd to select on of the provided
> > +# DFS Channels when the current channels becomes unavailable due to
> > +# radar interference. Only useful when ieee80211h=1 is set.
> > +# Default: not set
> > +#dfs_chanlist=100 104 108 112 116
> > +
> 
> Would it make sense to also use this for automatic channel selection?
> So, instead of just using it for DFS channel switching we might use the
> same list to restrict ACS to a subset of channels?
> In that case however this should have a more generic name like "chanlist".

That might be useful indeed, although I'm not familiar with ACS and don't plan 
to work on it. If you want, I can change the parameter name to chanlist as you 
suggest and leave the ACS part to someone else?

Cheers,
    Simon