openwrt-owl/package/madwifi/patches/441-fix_ibss_node_handling.patch

--- a/ath/if_ath.c
+++ b/ath/if_ath.c
@@ -6641,10 +6641,8 @@ static void
 ath_recv_mgmt(struct ieee80211vap * vap, struct ieee80211_node *ni_or_null,
 	struct sk_buff *skb, int subtype, int rssi, u_int64_t rtsf)
 {
+	const struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;
 	struct ath_softc *sc = netdev_priv(vap->iv_ic->ic_dev);
-#ifdef AR_DEBUG
-        struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;
-#endif
 	struct ieee80211_node * ni = ni_or_null;
 	u_int64_t hw_tsf, beacon_tsf;
 	u_int32_t hw_tu, beacon_tu, intval;
@@ -6686,7 +6684,7 @@ ath_recv_mgmt(struct ieee80211vap * vap,
 		}
 		if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
 				(sc->sc_opmode == HAL_M_HOSTAP) &&
-				IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
+				IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bssid)) {
 			/* In this mode, we drive the HAL in HOSTAP mode. Hence
 			 * we do the IBSS merging in software. Also do not merge
 			 * if the difference it too small. Otherwise we are playing
--- a/net80211/ieee80211_input.c
+++ b/net80211/ieee80211_input.c
@@ -311,7 +311,8 @@ ieee80211_input(struct ieee80211vap * va
 			}
 			/* Do not try to find a node reference if the packet really did come from the BSS */
 			if (type == IEEE80211_FC0_TYPE_DATA && ni == vap->iv_bss &&
-					!IEEE80211_ADDR_EQ(vap->iv_bss->ni_macaddr, wh->i_addr2)) {
+					!IEEE80211_ADDR_EQ(vap->iv_bss->ni_macaddr, wh->i_addr2) &&
+					IEEE80211_ADDR_EQ(vap->iv_bssid, wh->i_addr3)) {
 				/* Try to find sender in local node table. */
 				ni = ieee80211_find_node(&ic->ic_sta, wh->i_addr2);
 				if (ni == NULL) {
@@ -513,6 +514,10 @@ ieee80211_input(struct ieee80211vap * va
 			break;
 		case IEEE80211_M_IBSS:
 		case IEEE80211_M_AHDEMO:
+			/* ignore foreign data frames */
+			if (ni == vap->iv_bss)
+				goto out;
+
 			if (dir != IEEE80211_FC1_DIR_NODS) {
 				IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 					wh, "data", "invalid dir 0x%x", dir);
@@ -3552,6 +3557,11 @@ ieee80211_recv_mgmt(struct ieee80211vap 
 			} else if (vap->iv_opmode == IEEE80211_M_WDS) {
 				found = 1;
 				ni = ni_or_null = vap->iv_wdsnode;
+			} else if (vap->iv_opmode == IEEE80211_M_IBSS) {
+				ni_or_null = ieee80211_find_node(&ic->ic_sta, wh->i_addr2);
+				if (ni_or_null)
+					ni = ni_or_null;
+				found = 1;
 			}
 			IEEE80211_UNLOCK_IRQ(vap->iv_ic);
 
@@ -3676,19 +3686,8 @@ ieee80211_recv_mgmt(struct ieee80211vap 
 			vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
 			return;
 		}
-		if (ni == vap->iv_bss) {
-			if (vap->iv_opmode == IEEE80211_M_IBSS) {
-				/*
-				 * XXX Cannot tell if the sender is operating
-				 * in ibss mode.  But we need a new node to
-				 * send the response so blindly add them to the
-				 * neighbor table.
-				 */
-				ni = ieee80211_fakeup_adhoc_node(vap,
-					wh->i_addr2);
-			} else {
-				ni = ieee80211_dup_bss(vap, wh->i_addr2, 1);
-			}
+		if (ni == vap->iv_bss && vap->iv_opmode != IEEE80211_M_IBSS) {
+			ni = ieee80211_dup_bss(vap, wh->i_addr2, 1);
 			if (ni == NULL)
 				return;
 			allocbs = 1;
--- a/net80211/ieee80211_node.c
+++ b/net80211/ieee80211_node.c
@@ -601,6 +601,7 @@ ieee80211_ibss_merge(struct ieee80211_no
 		ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
 		ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
 		ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "");
+	ieee80211_node_table_reset(&vap->iv_ic->ic_sta, vap);
 	return ieee80211_sta_join1(ieee80211_ref_node(ni));
 }
 EXPORT_SYMBOL(ieee80211_ibss_merge);