added code to fix no endpoints been seen in hns network for npm lite in l1vh node

Author: rejain789

npm/examples/windows/azure-npm-lite-win.yaml

@@ -154,6 +154,7 @@ data:
             "ApplyIPSetsOnNeed":       false,
             "ApplyInBackground":       true,
             "NetPolInBackground":      true
-            "EnableNPMLite":           true
+            "EnableNPMLite":           true,
+            "IsL1VHNode":              true
         }
     }

npm/pkg/dataplane/dataplane.go

@@ -45,6 +45,8 @@ type Config struct {
 	NetPolInBackground bool
 	MaxPendingNetPols  int
 	NetPolInterval     time.Duration
+	IsL1VHNode         bool
+	EnableNPMLite      bool
 	*ipsets.IPSetManagerCfg
 	*policies.PolicyManagerCfg
 }

npm/pkg/dataplane/dataplane_windows.go

@@ -52,6 +52,12 @@ func (dp *DataPlane) initializeDataPlane() error {
 	}
 	// Filter out any endpoints that are not in "AttachedShared" State. All running Windows pods with networking must be in this state.
 	filterMap := map[string]uint16{"State": hcnEndpointStateAttachedSharing}
+
+	// if npm lite is enabled and running on l1vh node, filter out any endpoints that are not in "Attached" State
+	if dp.EnableNPMLite && dp.IsL1VHNode {
+		filterMap = map[string]uint16{"State": hcnEndpointStateAttached}
+	}
+
 	filter, err := json.Marshal(filterMap)
 	if err != nil {
 		return npmerrors.SimpleErrorWrapper("failed to marshal endpoint filter map", err)