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| author | Johannes Berg <johannes@sipsolutions.net> | 2007-08-28 17:01:55 -0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:48:56 -0700 |
| commit | 8dc06a1c6112fef7616d26e0b001455b5d8c3c5e (patch) | |
| tree | e7e37614847c2e7b26834a0a97bfddbac38661e0 | |
| parent | b331615722779b078822988843ddffd4eaec9f83 (diff) | |
| download | linux-3.10-8dc06a1c6112fef7616d26e0b001455b5d8c3c5e.tar.gz linux-3.10-8dc06a1c6112fef7616d26e0b001455b5d8c3c5e.tar.bz2 linux-3.10-8dc06a1c6112fef7616d26e0b001455b5d8c3c5e.zip | |
[MAC80211]: improve key selection comment
When I changed the code there I forgot to mention what happens
with multicast frames in a regular BSS and keep wondering myself
if the code is correct. Add appropriate comments.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/mac80211/rx.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 969be3adda7..75a1e204b9b 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -327,8 +327,15 @@ ieee80211_rx_h_load_key(struct ieee80211_txrx_data *rx) * frames can also use key indizes like GTKs. Hence, if we don't * have a PTK/STK we check the key index for a WEP key. * + * Note that in a regular BSS, multicast frames are sent by the + * AP only, associated stations unicast the frame to the AP first + * which then multicasts it on their behalf. + * * There is also a slight problem in IBSS mode: GTKs are negotiated * with each station, that is something we don't currently handle. + * The spec seems to expect that one negotiates the same key with + * every station but there's no such requirement; VLANs could be + * possible. */ if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) |