batman-adv: mark a local client as isolated when needed

A client sending packets which mark matches the value
configured via sysfs has to be identified as isolated using
the TT_CLIENT_ISOLA flag.

The match is mask based, meaning that only bits set in the
mask are compared with those in the mark value.

If the configured mask is equal to 0 no operation is
performed.

Such flag is then advertised within the classic client
announcement mechanism.

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 35a82e3..e126d74 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -119,7 +119,7 @@
 		batadv_tt_local_remove(bat_priv, old_addr, BATADV_NO_FLAGS,
 				       "mac address changed", false);
 		batadv_tt_local_add(dev, addr->sa_data, BATADV_NO_FLAGS,
-				    BATADV_NULL_IFINDEX);
+				    BATADV_NULL_IFINDEX, BATADV_NO_MARK);
 	}
 
 	return 0;
@@ -199,7 +199,8 @@
 	/* Register the client MAC in the transtable */
 	if (!is_multicast_ether_addr(ethhdr->h_source)) {
 		client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
-						   vid, skb->skb_iif);
+						   vid, skb->skb_iif,
+						   skb->mark);
 		if (!client_added)
 			goto dropped;
 	}
@@ -489,7 +490,7 @@
 	 */
 	batadv_tt_local_add(bat_priv->soft_iface,
 			    bat_priv->soft_iface->dev_addr, vid,
-			    BATADV_NULL_IFINDEX);
+			    BATADV_NULL_IFINDEX, BATADV_NO_MARK);
 
 	spin_lock_bh(&bat_priv->softif_vlan_list_lock);
 	hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);