[source] hostapd: add a WDS AP fix for reconnecting clients

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=ad430c1080fa2096d02b054115bd806af4906aea

commit ad430c1080fa2096d02b054115bd806af4906aea
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Wed Jul 6 08:06:46 2016 +0200

    hostapd: add a WDS AP fix for reconnecting clients
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 ...ix-reconnecting-client-on-connection-lost.patch | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/package/network/services/hostapd/patches/001-4addr-fix-reconnecting-client-on-connection-lost.patch b/package/network/services/hostapd/patches/001-4addr-fix-reconnecting-client-on-connection-lost.patch
new file mode 100644
index 0000000..5c8b662
--- /dev/null
+++ b/package/network/services/hostapd/patches/001-4addr-fix-reconnecting-client-on-connection-lost.patch
@@ -0,0 +1,25 @@
+From: Matthias May <matthias.may at neratec.com>
+Date: Tue, 5 Jul 2016 15:00:43 +0200
+Subject: [PATCH] 4addr: fix reconnecting client on connection lost
+
+When a 4addr client suddenly looses its connection (no deauth/deassoc)
+the AP still thinks it is connected.
+If the client reconnects before the AP timeoutes the client, traffic
+cannot flow.
+
+Fix this by making sure the WLAN_STA_WDS flag is unset in the sta->flags
+when the client completes association.
+
+Signed-off-by: Matthias May <matthias.may at neratec.com>
+---
+
+--- a/src/ap/ieee802_11.c
++++ b/src/ap/ieee802_11.c
+@@ -2826,6 +2826,7 @@ static void handle_assoc_cb(struct hosta
+ 		new_assoc = 0;
+ 	sta->flags |= WLAN_STA_ASSOC;
+ 	sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
++	sta->flags &= ~WLAN_STA_WDS;
+ 	if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) ||
+ 	    sta->auth_alg == WLAN_AUTH_FT) {
+ 		/*