ipv6: Ignore routes that have ipv6 gateway

We ignore routes that have an ipv6 destination, since hyperstart agent
does not have support for ipv6 currently. We should do the same
for default route that has an ipv6 gateway address.

Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>

hyperstart_agent.go

@@ -143,6 +143,12 @@ func (h *hyper) processHyperRoute(route netlink.Route, deviceName string) *hyper
 	gateway := route.Gw.String()
 	if gateway == "<nil>" {
 		gateway = ""
+	} else if route.Gw.To4() == nil { // Skip IPv6 as it is not supported by hyperstart agent
+		h.Logger().WithFields(logrus.Fields{
+			"unsupported-route-type": "ipv6",
+			"gateway":                gateway,
+		}).Warn("unsupported route")
+		return nil
 	}
 
 	var destination string