Subject: Re: Userspace tools: Roadmap?
From: Johannes Berg <johannes@sipsolutions.net>
To: Dan E <trg_info@mailhaven.com>
Cc: linux-wireless@vger.kernel.org
In-Reply-To: <1228778295.10662.1288975589@webmail.messagingengine.com>
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	 (sfid-20081208_002919_244971_30E436F9) <1228723993.22164.65.camel@johannes.berg>
	 <1228778295.10662.1288975589@webmail.messagingengine.com>
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Date: Tue, 09 Dec 2008 00:26:41 +0100
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On Mon, 2008-12-08 at 18:18 -0500, Dan E wrote:

> > > Userspace tools.  I want to proceed as if Wireless Extensions never
> > > existed.  Is that even possible?
> >=20
> > No, it's not.
>=20
> My fault for assuming too much about the urgency to get away from WE.

Well, nobody seems to really want to work on replacing already working
features... I have a patch for scanning with iw though.

> > Yes, it should, and nl80211 even supports it, but iw itself doesn't yet=
.
> > That's fairly easy to fix, too, but then iw won't support actually
> > telling mac80211 to scan and associate etc.
>=20
> Right.  I had a few early problems with iw.  For instance, the Linux
> Wireless web pages say you need "at least" libnl-1.0-pre8, but it won't
> build with libnl-1.2 or 2.0.  I had to go with libnl-1.1 to make it
> happy.  iw seems to be like a redheaded stepchild.

There's libnl 1.2 and 2.0? That's news to me! Patches welcome. Sorry, I
guess it needs 1.0 or 1.1, will fix the page.

> That's what I thought but I wasn't seeing any callbacks at all through
> my ieee80211_ops pointers.  I did see the channel frequency change with
> 'iwconfig wlan0', but no callbacks.  My fault, again, for not RTFM.  I
> haven't gotten to the point yet on my driver where I expect 'ip link set
> up dev wlan0' (or 'ifconfig wlan0 up', if you prefer) and now I see
> that's why the config callback never happened. =20

Ah. Yes, if the hw isn't started mac80211 won't try to configure it :)

> If I had RTFM I might
> have noticed adding 'commit' at the end of the iwconfig command would
> have done it without the 'up'.

No, it wouldn't, commit is pointless, don't worry about it, you'll never
need to use it with mac80211.

johannes

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