hostapd: backport a few upstream fixes

Fixes reassoc issues with WDS mode
Fixes reassoc issues in AP mode
Fixes IBSS reauthentication issues

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/network/services/hostapd/patches/001-Fix-race-condition-between-AssocResp-callback-and-4a.patch

@@ -0,0 +1,83 @@
+From: Jouni Malinen <jouni@qca.qualcomm.com>
+Date: Tue, 20 Dec 2016 01:30:09 +0200
+Subject: [PATCH] Fix race condition between AssocResp callback and 4addr event
+
+It is apparently possible for the NL80211_CMD_UNEXPECTED_4ADDR_FRAME
+event to be delivered to hostapd before the NL80211_CMD_FRAME_TX_STATUS
+event for (Re)Association Response frame. This resulted in the 4-address
+WDS mode not getting enabled for a STA. This could occur in particular
+when operating under heavy load and the STA is reconnecting to the same
+AP in a sequence where Deauthentication frame is followed immediately by
+Authentication frame and the driver event processing gets delayed due to
+removal of the previous netdev taking time in the middle of this
+sequence.
+
+Fix this by recording a pending item for 4-address WDS enabling if the
+NL80211_CMD_UNEXPECTED_4ADDR_FRAME event would have been dropped due to
+incompleted association and then process this pending item if the TX
+status for the (Re)Association Response frame is received and it shows
+that the frame was acknowledged.
+
+Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
+---
+
+--- a/src/ap/ieee802_11.c
++++ b/src/ap/ieee802_11.c
+@@ -2634,6 +2634,8 @@ static void handle_assoc(struct hostapd_
+ 	taxonomy_sta_info_assoc_req(hapd, sta, pos, left);
+ #endif /* CONFIG_TAXONOMY */
+ 
++	sta->pending_wds_enable = 0;
++
+  fail:
+ 	/*
+ 	 * In case of a successful response, add the station to the driver.
+@@ -3248,6 +3250,14 @@ static void handle_assoc_cb(struct hosta
+ 
+ 	hostapd_set_sta_flags(hapd, sta);
+ 
++	if (!(sta->flags & WLAN_STA_WDS) && sta->pending_wds_enable) {
++		wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for STA "
++			   MACSTR " based on pending request",
++			   MAC2STR(sta->addr));
++		sta->pending_wds_enable = 0;
++		sta->flags |= WLAN_STA_WDS;
++	}
++
+ 	if (sta->flags & WLAN_STA_WDS) {
+ 		int ret;
+ 		char ifname_wds[IFNAMSIZ + 1];
+@@ -3512,10 +3522,22 @@ void ieee802_11_rx_from_unknown(struct h
+ 	struct sta_info *sta;
+ 
+ 	sta = ap_get_sta(hapd, src);
+-	if (sta && (sta->flags & WLAN_STA_ASSOC)) {
++	if (sta &&
++	    ((sta->flags & WLAN_STA_ASSOC) ||
++	     ((sta->flags & WLAN_STA_ASSOC_REQ_OK) && wds))) {
+ 		if (!hapd->conf->wds_sta)
+ 			return;
+ 
++		if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK)) ==
++		    WLAN_STA_ASSOC_REQ_OK) {
++			wpa_printf(MSG_DEBUG,
++				   "Postpone 4-address WDS mode enabling for STA "
++				   MACSTR " since TX status for AssocResp is not yet known",
++				   MAC2STR(sta->addr));
++			sta->pending_wds_enable = 1;
++			return;
++		}
++
+ 		if (wds && !(sta->flags & WLAN_STA_WDS)) {
+ 			int ret;
+ 			char ifname_wds[IFNAMSIZ + 1];
+--- a/src/ap/sta_info.h
++++ b/src/ap/sta_info.h
+@@ -115,6 +115,7 @@ struct sta_info {
+ 	unsigned int radius_das_match:1;
+ 	unsigned int ecsa_supported:1;
+ 	unsigned int added_unassoc:1;
++	unsigned int pending_wds_enable:1;
+ 
+ 	u16 auth_alg;
+ 

package/network/services/hostapd/patches/002-Fix-duplicate-Reassociation-Request-frame-dropping.patch

@@ -0,0 +1,36 @@
+From: Jouni Malinen <jouni@qca.qualcomm.com>
+Date: Sat, 14 Jan 2017 01:04:31 +0200
+Subject: [PATCH] Fix duplicate Reassociation Request frame dropping
+
+Relational operators (==) have higher precedence than the ternary
+conditional in C. The last_subtype check for association/reassociation
+was broken due to incorrect assumption about the precedence. Fix this by
+adding parenthesis around the ternary conditional.
+
+The previous implementation worked for Association Request frames by
+accident since WLAN_FC_STYPE_ASSOC_REQ happens to have value 0 and when
+the last receive frame was an Association Request frame, the
+sta->last_subtype == reassoc check was true and non-zero
+WLAN_FC_STYPE_REASSOC_REQ was interpreted as true. However, this was
+broken for Reassociation Request frame. reassoc == 1 in that case could
+have matched received Association Response frame (subtype == 1), but
+those are not received in AP mode and as such, this did not break other
+behavior apart from not being able to drop duplicated Reassociation
+Request frames.
+
+Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
+---
+
+--- a/src/ap/ieee802_11.c
++++ b/src/ap/ieee802_11.c
+@@ -2485,8 +2485,8 @@ static void handle_assoc(struct hostapd_
+ 	if ((fc & WLAN_FC_RETRY) &&
+ 	    sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
+ 	    sta->last_seq_ctrl == seq_ctrl &&
+-	    sta->last_subtype == reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
+-	    WLAN_FC_STYPE_ASSOC_REQ) {
++	    sta->last_subtype == (reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
++				  WLAN_FC_STYPE_ASSOC_REQ)) {
+ 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
+ 			       HOSTAPD_LEVEL_DEBUG,
+ 			       "Drop repeated association frame seq_ctrl=0x%x",

package/network/services/hostapd/patches/003-RSN-IBSS-Fix-TK-clearing-on-Authentication-frame-RX.patch

@@ -0,0 +1,40 @@
+From: Jouni Malinen <j@w1.fi>
+Date: Sat, 14 Jan 2017 13:56:18 +0200
+Subject: [PATCH] RSN IBSS: Fix TK clearing on Authentication frame RX
+
+When wpa_supplicant was processing a received Authentication frame (seq
+1) from a peer STA for which there was already a TK configured to the
+driver, debug log claimed that the PTK gets cleared, but the actual
+call to clear the key was actually dropped due to AUTH vs. SUPP set_key
+selection. Fix this by explicitly clearing the TK in case it was set
+and an Authentication frame (seq 1) is received.
+
+This fixes some cases where EAPOL-Key frames were sent encrypted using
+the old key when a peer STA restarted itself and lost the key and had to
+re-join the IBSS. Previously, that state required timing out the 4-way
+handshake and Deauthentication frame exchange to recover.
+
+Signed-off-by: Jouni Malinen <j@w1.fi>
+---
+
+--- a/wpa_supplicant/ibss_rsn.c
++++ b/wpa_supplicant/ibss_rsn.c
+@@ -838,6 +838,18 @@ static void ibss_rsn_handle_auth_1_of_2(
+ 		   MAC2STR(addr));
+ 
+ 	if (peer &&
++	    peer->authentication_status & (IBSS_RSN_SET_PTK_SUPP |
++					   IBSS_RSN_SET_PTK_AUTH)) {
++		/* Clear the TK for this pair to allow recovery from the case
++		 * where the peer STA has restarted and lost its key while we
++		 * still have a pairwise key configured. */
++		wpa_printf(MSG_DEBUG, "RSN: Clear pairwise key for peer "
++			   MACSTR, MAC2STR(addr));
++		wpa_drv_set_key(ibss_rsn->wpa_s, WPA_ALG_NONE, addr, 0, 0,
++				NULL, 0, NULL, 0);
++	}
++
++	if (peer &&
+ 	    peer->authentication_status & IBSS_RSN_AUTH_EAPOL_BY_PEER) {
+ 		if (peer->own_auth_tx.sec) {
+ 			struct os_reltime now, diff;

package/network/services/hostapd/patches/100-daemonize_fix.patch

@@ -60,13 +60,13 @@
 +	if (chdir("/") < 0)
  		return -1;
 -	}
--
+ 
 -	return 0;
 -}
 -#else /* __APPLE__ */
 -#define os_daemon daemon
 -#endif /* __APPLE__ */
- 
+-
 -
 -int os_daemonize(const char *pid_file)
 -{

package/network/services/hostapd/patches/600-ubus_support.patch

@@ -156,7 +156,7 @@
  	/*
  	 * sta->capability is used in check_assoc_ies() for RRM enabled
  	 * capability element.
-@@ -3023,7 +3049,7 @@ int ieee802_11_mgmt(struct hostapd_data
+@@ -3025,7 +3051,7 @@ int ieee802_11_mgmt(struct hostapd_data
  
  
  	if (stype == WLAN_FC_STYPE_PROBE_REQ) {
@@ -165,7 +165,7 @@
  		return 1;
  	}
  
-@@ -3041,17 +3067,17 @@ int ieee802_11_mgmt(struct hostapd_data
+@@ -3043,17 +3069,17 @@ int ieee802_11_mgmt(struct hostapd_data
  	switch (stype) {
  	case WLAN_FC_STYPE_AUTH:
  		wpa_printf(MSG_DEBUG, "mgmt::auth");