Daniel Golle a écrit :
hi!
i've got an rtl8187l and want to use it in Ad-Hoc mode (actually
pseudo_adhoc would actually even be enough!). i researched a little
bit and found out that ad-hoc-, master- and mesh-mode are unsupported
due to the lack of beacon generation support in the mac80211 version
of the rtl8187 driver.
as the softmac card probably doesn't support generating beacons in
firmware, does that mean we need to setup a beacon generation fork
repeatedly calling
ieee80211_beacon_get
and then sending the beacon? (very roughly, i'm guessing after reading
any 802.11 code for 20 minutes)
probably a timing-critical task which needs to bypass the usual
buffers and such i can imagine...
TSF synchronisation is indeed critical since lots of mecanism like
power-save, IBSS merges, ... requires a proper TSF. I don't know how
accurate kernel timers are, but they might not match the IBSS expectation.
anyway. pseudo_adhoc (i.e. ad-hoc without beacons) is a nice thing and
works great for use with user-space mesh-routing solutions such as
OLSR, batman or babel. however, i guess as pseudo_adhoc is violating
the standards (though it is very usefull) it might never be supported
by anything else than proprietary drivers made by Atheros (afaik).
so. i want to use this hardware (RTL8187L) for this task (OLSR). any
ideas? where should i start wasting my brain-time?
Pseudo-IBSS is just like IBSS except :
- you don't send beacons
- BSSID is fixed at 00:00:00:00:00:00 (so SSID is useless .... and since
there's no beacon anyway).
Maybe you could image an IBSS-like mode where :
- you don't send beacons (or at least don't rely on them)
- you still reply to Probe Request by Probe Response (so you can still
scan, search for an SSID and synchronize the BSSID). However, you can
have splits without proper handling of IBSS merges...
I would implement this latter since it's closer to the standard 802.11
IBSS mode, which means less modifications in current and less
interoperability problems.
ot: anyone ever tried compiling the FullMAC r8187 driver (aircrack)
for Atheros/MIPS systems?
cheers
daniel
Regards,
Benoit
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
