batman-adv: implement AP-isolation on the sender side

If a node has to send a packet issued by a WIFI client to another WIFI client,
the packet is dropped.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
index 32b125fb3d3b..07d1c1da89dd 100644
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@ -299,8 +299,10 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
                         goto find_router;
         }
 
-        /* check for tt host - increases orig_node refcount */
-        orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+        /* check for tt host - increases orig_node refcount.
+         * returns NULL in case of AP isolation */
+        orig_node = transtable_search(bat_priv, ethhdr->h_source,
+                                      ethhdr->h_dest);
 
 find_router:
         /**