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mac80211: Do not try to associate with an empty SSID 

It looks like some programs (e.g., NM) are setting an empty SSID with
SIOCSIWESSID in some cases. This seems to trigger mac80211 to try to
associate with an invalid configuration (wildcard SSID) which will
result in failing associations (or odd issues, potentially including
kernel panic with some drivers) if the AP were to actually accept this
anyway).

Only start association process if the SSID is actually set. This
speeds up connection with NM in number of cases and avoids sending out
broken association request frames.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jouni Malinen 2009-06-11 18:19:45 +03:00 committed by John W. Linville
parent e1f8a19e6f
commit 68f2d02669
1 changed files with 8 additions and 0 deletions
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8
net/mac80211/mlme.c
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@ -2445,6 +2445,14 @@ void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
ieee80211_set_disassoc(sdata, true, true,
WLAN_REASON_DEAUTH_LEAVING);
if (ifmgd->ssid_len == 0) {
/*
* Only allow association to be started if a valid SSID
* is configured.
*/
return;
}
if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);