Fix that Service routes may get lost when starting on Windows

Fix antrea-io#4467

Signed-off-by: Hongliang Liu <lhongliang@vmware.com>

pkg/agent/route/route_windows.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"strings"
 	"sync"
 
 	"k8s.io/apimachinery/pkg/util/sets"
@@ -133,6 +134,8 @@ func (c *Client) Reconcile(podCIDRs []string, svcIPs map[string]bool) error {
 			c.hostRoutes.Store(dst, rt)
 			continue
 		}
+		// Remove suffix since svcIP in svcIPs doesn't have a suffix.
+		dst = strings.Split(dst, "/")[0]
 		if _, ok := svcIPs[dst]; ok {
 			c.hostRoutes.Store(dst, rt)
 			continue
@@ -288,7 +291,7 @@ func (c *Client) addServiceRoute(svcIP net.IP) error {
 		return err
 	}
 
-	c.hostRoutes.Store(route.DestinationSubnet.String(), route)
+	c.hostRoutes.Store(svcIP.String(), route)
 	klog.V(2).InfoS("Added Service route", "ServiceIP", route.DestinationSubnet, "GatewayIP", route.GatewayAddress)
 	return nil
 }