Update to flooding router

src/mesh/FloodingRouter.h

@@ -60,6 +60,14 @@ class FloodingRouter : public Router, protected PacketHistory
      */
     virtual bool inRangeOfRouter();
 
+    /**
+     * Is the packet from a device that is physically near this node?
+     * 
+     * Calculated based on the received SNR.
+     * @return true if the received packet is physically close to this node.
+     */
+    virtual bool isPacketLocal(const MeshPacket *p);
+
     /**
      * Look for broadcasts we need to rebroadcast
      */