batman-adv: add seqno maximum age and protection start flag parameters

To allow future use of the window protected function with different
maximum sequence numbers, add a parameter to set this value which
was previously hardcoded. Another parameter added for future use is a
flag to return whether the protection window has started.

While at it, also fix the kerneldoc.

Signed-off-by: Simon Wunderlich <simon@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h
index c776e96..02a5caa 100644
--- a/net/batman-adv/routing.h
+++ b/net/batman-adv/routing.h
@@ -52,6 +52,7 @@
 		   struct batadv_orig_node *orig_node,
 		   struct batadv_hard_iface *recv_if);
 int batadv_window_protected(struct batadv_priv *bat_priv, s32 seq_num_diff,
-			    unsigned long *last_reset);
+			    s32 seq_old_max_diff, unsigned long *last_reset,
+			    bool *protection_started);
 
 #endif /* _NET_BATMAN_ADV_ROUTING_H_ */