madwifi: preserve WPA IEs received in probe responses and prefer them over beacon information improves reliability when using wpa_supplicant to connect to aps with hidden ssid and dynamic encryption settings

SVN-Revision: 11928

package/madwifi/patches/368-sta_ie_preserve.patch

@@ -0,0 +1,49 @@
+--- a/net80211/ieee80211_scan_sta.c
++++ b/net80211/ieee80211_scan_sta.c
+@@ -201,8 +201,10 @@
+ }
+ 
+ static void
+-saveie(u_int8_t **iep, const u_int8_t *ie)
++saveie(u_int8_t **iep, const u_int8_t *ie, int preserve)
+ {
++	if (preserve && *iep)
++		return;
+ 	if (ie == NULL)
+ 		*iep = NULL;
+ 	else
+@@ -304,10 +306,10 @@
+ 		    (const struct ieee80211_tim_ie *) sp->tim;
+ 		ise->se_dtimperiod = tim->tim_period;
+ 	}
+-	saveie(&ise->se_wme_ie, sp->wme);
+-	saveie(&ise->se_wpa_ie, sp->wpa);
+-	saveie(&ise->se_rsn_ie, sp->rsn);
+-	saveie(&ise->se_ath_ie, sp->ath);
++	saveie(&ise->se_wme_ie, sp->wme, 0);
++	saveie(&ise->se_wpa_ie, sp->wpa, !sp->isprobe);
++	saveie(&ise->se_rsn_ie, sp->rsn, !sp->isprobe);
++	saveie(&ise->se_ath_ie, sp->ath, 0);
+ 
+ 	/* clear failure count after STA_FAIL_AGE passes */
+ 	if (se->se_fails && (jiffies - se->se_lastfail) > STA_FAILS_AGE*HZ) {
+--- a/net80211/ieee80211_input.c
++++ b/net80211/ieee80211_input.c
+@@ -3106,6 +3106,7 @@
+ 		 */
+ 		IEEE80211_VERIFY_LENGTH(efrm - frm, 12);
+ 		memset(&scan, 0, sizeof(scan));
++		scan.isprobe = (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) && IEEE80211_ADDR_EQ(wh->i_addr2, vap->iv_myaddr);
+ 		scan.tstamp  = frm;
+ 		frm += 8;
+ 		scan.bintval = le16toh(*(__le16 *)frm);
+--- a/net80211/ieee80211_scan.h
++++ b/net80211/ieee80211_scan.h
+@@ -133,6 +133,7 @@
+ 	u_int8_t erp;
+ 	u_int16_t bintval;
+ 	u_int8_t timoff;
++	u_int8_t isprobe;
+ 	u_int8_t *tim;
+ 	u_int8_t *tstamp;
+ 	u_int8_t *country;