Re: WPA + IBSS?

[Dan Williams <dcbw redhat com>]

On Fri, 2008-12-12 at 04:00 +0200, Maxim Levitsky wrote:
> I am testing now the connection sharing feature of NM.
> It mostly works, but I found out that I can't create an ad hoc wpa2
> protected network. 
> Is this possible (nm creates it, but it doesn't work)?

It should be possible, yes, but the first question is "does the driver
work?"  This was the major problem when I was actually developing the
feature, and I had to go fix the drivers and supplicant to make it work.
So, make sure you have at least the following things:

- 2.6.26 or later kernel
   * mac80211: the IBSS search interval was too short, plus the stack
never notified userspace that it had successfully created the network
       872ba53395b2a8be08c3ea2d39e225e5b4a8cb40
       507b06d0622480f8026d49a94f86068bb0fd6ed6

   * ipw2200: the driver wouldn't expire old BSS entries when creating
and IBSS and hit an internal BSS limit
       a6d4eae80157830af9c9d80de2daf6611696a34e

- wpa_supplicant 0.6.6 or later
   * the wext driver was not correctly downing the interface and
bringing it back up again when switching from infra to ibss mode
       1d3c75b3b6663ed9f3a9a8dea8d47056cce2680f

   * the ordering of operations after mode switch was wrong
       ec5f180a24cd31ba9d3d7f2abc9dc557fd16602f

   * the supplicant wasn't waiting long enough for IBSS creation
       1d3c75b3b6663ed9f3a9a8dea8d47056cce2680f

Then, see if you can set up a supplicant config that works for you, and
if the supplicant can do it correctly, then we have a chance of getting
NM to do it correctly.

Dan