Luis, Jouni,
I found and read the patch in question. If I understand things correctly,
this provides a way to set a mask that marks the data rates that are
available for the RC algorithm to choose from. This could be translated
into an iw command like this:
iw dev wlan0 rates 54M,11M
and then the current RC algorithm would be limited to choose either 54M or
11M as TX data rate. Is this correct?
Selecting a single fixed data rate would mean to only mark one data rate
as available. I think this meats my requirements in this area. However,
I still have another problem: We use Madwifi to multicast video streams.
With Madwifi we have an iwpriv call that allows the selection of the multicast/broadcast data rate. We need something equivalent for mac80211
before we can make the switch.
--
Regards
Joerg
--- Luis R. Rodriguez <mcgrof@xxxxxxxxx> wrote:
> Von: Luis R. Rodriguez <mcgrof@xxxxxxxxx>
> Betreff: Re: mac80211: Open bug in current wireless-testing
> An: "Joerg Pommnitz" <pommnitz@xxxxxxxxx>
> CC: linux-wireless@xxxxxxxxxxxxxxx, "Jouni.Malinen" <Jouni.Malinen@xxxxxxxxxxx>
> Datum: Mittwoch, 27. Januar 2010, 19:12
> On Wed, Jan 27, 2010 at 6:17 AM,
> Joerg Pommnitz <pommnitz@xxxxxxxxx>
> wrote:
> > Hello all,
> > some time ago I reported that it is currently
> impossible to change a manually selected data rate back to
> the automatic rate selection. This bug is still present and
> is easy to reproduce:
> >
> > iwconfig wlan0 rate 54M
> > iwconfig wlan0 rate auto
> >
> > I know that the wireless extensions are deprecated,
> but until iw supports manual rate selection, iwconfig is
> what I have to use.
>
> Review the patch:
>
> Author: Jouni Malinen <jouni.malinen@xxxxxxxxxxx>
> Date: Tue Dec 29 12:59:45 2009 +0200
>
> nl80211: New command for setting TX rate mask
> for rate control
>
> Add a new NL80211_CMD_SET_TX_BITRATE_MASK
> command and related
> attributes to provide support for setting TX
> rate mask for rate
> control. This uses the existing cfg80211
> set_bitrate_mask operation
> that was previously used only with WEXT
> compat code (SIOCSIWRATE). The
> nl80211 command allows more generic
> configuration of allowed rates as
> a mask instead of fixed/max rate.
>
> Signed-off-by: Jouni Malinen <jouni.malinen@xxxxxxxxxxx>
> Acked-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
>
> I think that addresses this, not sure if we ever got the iw
> equivalent
> patches to let userspace use this yet.
>
> There are however three wext things which we still do need
> implement to nl80211:
>
> iwconfig wlan0 txpower 17 # sets TX output power to 17 dBm
> iwconfig wlan0 power off # disables power save
> iwconfig wlan0 power 500m # enables dynamic power wave with
> 500ms idle
> timeout trigger
>
> I've stuffed this int our todo list [1], if you confirm
> that the above
> patch does not yet address what you wish please add it to
> the todo
> list.
>
> http://wireless.kernel.org/en/developers/todo-list
>
> Luis
>
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