TCP socket.

node/Constants.hpp

@@ -304,6 +304,11 @@ error_no_byte_order_defined;
  */
 #define ZT_PEER_LINK_ACTIVITY_TIMEOUT ((ZT_PEER_DIRECT_PING_DELAY * 2) + 1000)
 
+/**
+ * Close TCP tunnels if unused for this long
+ */
+#define ZT_TCP_TUNNEL_ACTIVITY_TIMEOUT ZT_PEER_LINK_ACTIVITY_TIMEOUT
+
 /**
  * Stop relaying via peers that have not responded to direct sends in this long
  */