batman-adv: don't let backbone gateways exchange tt entries
As the backbone gateways are connected to the same backbone, they
should announce the same clients on the backbone non-exclusively.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index a1d8c9b..1d1fd04 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -673,6 +673,13 @@
if (!is_my_mac(roam_adv_packet->dst))
return route_unicast_packet(skb, recv_if);
+ /* check if it is a backbone gateway. we don't accept
+ * roaming advertisement from it, as it has the same
+ * entries as we have.
+ */
+ if (bla_is_backbone_gw_orig(bat_priv, roam_adv_packet->src))
+ goto out;
+
orig_node = orig_hash_find(bat_priv, roam_adv_packet->src);
if (!orig_node)
goto out;