From: Javier Cardona <javier@cozybit.com>
Date: Fri, 16 Oct 2009 01:10:51 +0000 (-0700)
Subject: mac80211: Learn about mesh portals from multicast traffic
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=43b7b314f606b64f8645e4ec1a59df8a97a79b5a;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

mac80211: Learn about mesh portals from multicast traffic

Mesh portals proxy traffic for nodes external to the mesh.  When a
proxied frame is received by a mesh interface, it should update its mesh
portal table.  This was only happening for unicast frames.  With this
change we also learn about mesh portals from proxied multicast frames.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 7170bf4565a8..5c385e3c1d1f 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1504,19 +1504,28 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 		/* illegal frame */
 		return RX_DROP_MONITOR;
 
-	if (!is_multicast_ether_addr(hdr->addr1) &&
-			(mesh_hdr->flags & MESH_FLAGS_AE_A5_A6)) {
+	if (mesh_hdr->flags & MESH_FLAGS_AE) {
 		struct mesh_path *mppath;
+		char *proxied_addr;
+		char *mpp_addr;
+
+		if (is_multicast_ether_addr(hdr->addr1)) {
+			mpp_addr = hdr->addr3;
+			proxied_addr = mesh_hdr->eaddr1;
+		} else {
+			mpp_addr = hdr->addr4;
+			proxied_addr = mesh_hdr->eaddr2;
+		}
 
 		rcu_read_lock();
-		mppath = mpp_path_lookup(mesh_hdr->eaddr2, sdata);
+		mppath = mpp_path_lookup(proxied_addr, sdata);
 		if (!mppath) {
-			mpp_path_add(mesh_hdr->eaddr2, hdr->addr4, sdata);
+			mpp_path_add(proxied_addr, mpp_addr, sdata);
 		} else {
 			spin_lock_bh(&mppath->state_lock);
 			mppath->exp_time = jiffies;
-			if (compare_ether_addr(mppath->mpp, hdr->addr4) != 0)
-				memcpy(mppath->mpp, hdr->addr4, ETH_ALEN);
+			if (compare_ether_addr(mppath->mpp, mpp_addr) != 0)
+				memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
 			spin_unlock_bh(&mppath->state_lock);
 		}
 		rcu_read_unlock();