On Mon, 2015-01-05 at 11:14 +0100, Arend van Spriel wrote:
On 01/03/15 23:28, Paul Bolle wrote:
Side note: am I correct in thinking that there's some successor to
CFG80211_WEXT and that the ipw2200 driver could, at least in theory, be
ported to that successor? (ipw2200 hardware appears to be a bit old, so
probably no one would care enough to actually do that.)
net/wireless/kconfig doesn't mention anything like that, so probably I'm
just confused.
ipw2200 is a WEXT driver using some wext functionality (and struct
wiphy) provided by cfg80211 hence it needs CFG80211_WEXT. I guess that
is what makes it confusing.
It doesn't help that I hardly know anything about mac80211, cfg80211 and
nl80211 (and lib80211 for that matter). To me these are mostly just
names that end in 80211.
Anyhow, concerning, CFG80211_WEXT: it seems the only functionality
provided by that symbol that ipw2200 uses directly is
cfg80211_wext_giwname(). Perhaps ipw2200 could have a private version of
that function, something like ipw2100's ipw2100_wx_get_name(). Should be
trivial to implement (ie, it could take _me_ a day or two).
But perhaps ipw2200 uses CFG80211_WEXT _indirectly_ too. Ie, in
net/wireless/core.c I stumbled on
#ifdef CONFIG_CFG80211_WEXT
rdev->wiphy.wext =&cfg80211_wext_handler;
#endif
But I net/wireless/wext-core.c I then found
#ifdef CONFIG_CFG80211_WEXT
if (dev->ieee80211_ptr&& dev->ieee80211_ptr->wiphy)
handlers = dev->ieee80211_ptr->wiphy->wext;
#endif
#ifdef CONFIG_WIRELESS_EXT
if (dev->wireless_handlers)
handlers = dev->wireless_handlers;
#endif
(There's much more to discover about WEXT, of course.) Anyhow, IPW2200
uses both CFG80211_WEXT and WIRELESS_EXT and cfg80211_wext_handler and
ipw2200's wireless_handlers appear to cover the same set of IOCTLS (one
exception: SIOCSIWPMKSA). So by now I'm really puzzled how this all fits
together.
Thanks,
Paul Bolle