Raise an alert if the responding peer narrowed traffic selectors

src/libcharon/bus/bus.h

@@ -116,6 +116,10 @@ enum alert_t {
 	/** traffic selectors do not match, arguments are two linked_list_t
 	 *  containing traffic_selector_t for initiator and for responder */
 	ALERT_TS_MISMATCH,
+	/** traffic selectors have been narrowed by the peer, arguments are
+	 *  an int (TRUE for local TS), a linked_list_t* (final TS list), and the
+	 *  child_cfg_t*. */
+	ALERT_TS_NARROWED,
 	/** Installation of IPsec SAs failed, argument is child_sa_t */
 	ALERT_INSTALL_CHILD_SA_FAILED,
 	/** Installation of IPsec Policy failed, argument is child_sa_t */