diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-11-19 12:45:42 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-11-19 11:09:02 -0500 |
| commit | a58ce43f2fb17b728395ff530f019ca53c80145f (patch) | |
| tree | 1de5d2680d42de12902ccb85e99bc86f63eebf58 /net/mac80211 | |
| parent | 7351c6bd482712e5e3ec9dffc547de0e0863efb0 (diff) | |
| download | linux-a58ce43f2fb17b728395ff530f019ca53c80145f.tar.gz linux-a58ce43f2fb17b728395ff530f019ca53c80145f.tar.bz2 linux-a58ce43f2fb17b728395ff530f019ca53c80145f.zip | |
mac80211: avoid spurious deauth frames/messages
With WEXT, it happens frequently that the SME
requests an authentication but then deauthenticates
right away because some new parameters came along.
Every time this happens we print a deauth message
and send a deauth frame, but both of that is rather
confusing. Avoid it by aborting the authentication
process silently, and telling cfg80211 about that.
The patch looks larger than it really is:
__cfg80211_auth_remove() is split out from
cfg80211_send_auth_timeout(), there's no new code
except __cfg80211_auth_canceled() (a one-liner) and
the mac80211 bits (7 new lines of code).
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/mlme.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index f399547306c3..6dc7b5ad9a41 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2508,6 +2508,7 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_work *wk; const u8 *bssid = NULL; + bool not_auth_yet = false; mutex_lock(&ifmgd->mtx); @@ -2517,6 +2518,8 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, } else list_for_each_entry(wk, &ifmgd->work_list, list) { if (&wk->bss->cbss == req->bss) { bssid = req->bss->bssid; + if (wk->state == IEEE80211_MGD_STATE_PROBE) + not_auth_yet = true; list_del(&wk->list); kfree(wk); break; @@ -2524,6 +2527,20 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, } /* + * If somebody requests authentication and we haven't + * sent out an auth frame yet there's no need to send + * out a deauth frame either. If the state was PROBE, + * then this is the case. If it's AUTH we have sent a + * frame, and if it's IDLE we have completed the auth + * process already. + */ + if (not_auth_yet) { + mutex_unlock(&ifmgd->mtx); + __cfg80211_auth_canceled(sdata->dev, bssid); + return 0; + } + + /* * cfg80211 should catch this ... but it's racy since * we can receive a deauth frame, process it, hand it * to cfg80211 while that's in a locked section already |