fix: use defaultEntryPoints when no entryPoint is defined in a TCPRouter

pkg/config/runtime/runtime_tcp.go

@@ -15,14 +15,8 @@ func (c *Configuration) GetTCPRoutersByEntryPoints(ctx context.Context, entryPoi
 	for rtName, rt := range c.TCPRouters {
 		logger := log.FromContext(log.With(ctx, log.Str(log.RouterName, rtName)))
 
-		eps := rt.EntryPoints
-		if len(eps) == 0 {
-			logger.Debugf("No entryPoint defined for this router, using the default one(s) instead: %+v", entryPoints)
-			eps = entryPoints
-		}
-
 		entryPointsCount := 0
-		for _, entryPointName := range eps {
+		for _, entryPointName := range rt.EntryPoints {
 			if !contains(entryPoints, entryPointName) {
 				rt.AddError(fmt.Errorf("entryPoint %q doesn't exist", entryPointName), false)
 				logger.WithField(log.EntryPointName, entryPointName).

pkg/server/aggregator.go

@@ -61,6 +61,12 @@ func mergeConfiguration(configurations dynamic.Configurations, defaultEntryPoint
 
 		if configuration.TCP != nil {
 			for routerName, router := range configuration.TCP.Routers {
+				if len(router.EntryPoints) == 0 {
+					log.WithoutContext().
+						WithField(log.RouterName, routerName).
+						Debugf("No entryPoint defined for this TCP router, using the default one(s) instead: %+v", defaultEntryPoints)
+					router.EntryPoints = defaultEntryPoints
+				}
 				conf.TCP.Routers[provider.MakeQualifiedName(pvd, routerName)] = router
 			}
 			for serviceName, service := range configuration.TCP.Services {

pkg/server/aggregator_test.go

@@ -449,6 +449,35 @@ func Test_mergeConfiguration_tlsStore(t *testing.T) {
 	}
 }
 
+func Test_mergeConfiguration_defaultTCPEntryPoint(t *testing.T) {
+	given := dynamic.Configurations{
+		"provider-1": &dynamic.Configuration{
+			TCP: &dynamic.TCPConfiguration{
+				Routers: map[string]*dynamic.TCPRouter{
+					"router-1": {},
+				},
+				Services: map[string]*dynamic.TCPService{
+					"service-1": {},
+				},
+			},
+		},
+	}
+
+	expected := &dynamic.TCPConfiguration{
+		Routers: map[string]*dynamic.TCPRouter{
+			"router-1@provider-1": {
+				EntryPoints: []string{"defaultEP"},
+			},
+		},
+		Services: map[string]*dynamic.TCPService{
+			"service-1@provider-1": {},
+		},
+	}
+
+	actual := mergeConfiguration(given, []string{"defaultEP"})
+	assert.Equal(t, expected, actual.TCP)
+}
+
 func Test_applyModel(t *testing.T) {
 	testCases := []struct {
 		desc     string