Support Gateway API reference grant for HTTPRoute backends

Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>
2024-10-26 08:55:09 +03:00 · 2024-06-04 14:16:04 +02:00 · 2024-06-04 14:16:04 +02:00 · 7eac92f49c
commit 7eac92f49c
parent b452f37e08
10 changed files with 788 additions and 211 deletions
--- a/integration/k8s_conformance_test.go
+++ b/integration/k8s_conformance_test.go
@ -195,13 +195,23 @@ func (s *K8sConformanceSuite) TestK8sGatewayAPIConformance() {
 			LatestObservedGenerationSet:       5 * time.Second,
 			RequiredConsecutiveSuccesses:      0,
 		},
+		SupportedFeatures: sets.New(ksuite.SupportGateway, ksuite.SupportHTTPRoute).
+			Union(ksuite.HTTPRouteExtendedFeatures),
 		EnableAllSupportedFeatures: false,
 		RunTest:                    *k8sConformanceRunTest,
 		// Until the feature are all supported, following tests are skipped.
 		SkipTests: []string{
-			tests.HTTPRouteInvalidCrossNamespaceParentRef.ShortName,
-			tests.HTTPRoutePartiallyInvalidViaInvalidReferenceGrant.ShortName,
-			tests.HTTPRouteReferenceGrant.ShortName,
+			tests.HTTPRouteMethodMatching.ShortName,
+			tests.HTTPRouteQueryParamMatching.ShortName,
+			tests.HTTPRouteRedirectPath.ShortName,
+			tests.HTTPRouteRedirectPortAndScheme.ShortName,
+			tests.HTTPRouteRequestMirror.ShortName,
+			tests.HTTPRouteRequestMultipleMirrors.ShortName,
+			tests.HTTPRouteResponseHeaderModifier.ShortName,
+			tests.HTTPRouteRewriteHost.ShortName,
+			tests.HTTPRouteRewritePath.ShortName,
+			tests.HTTPRouteTimeoutBackendRequest.ShortName,
+			tests.HTTPRouteTimeoutRequest.ShortName,
 		},
 	}

--- a/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service.yml
+++ b/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service.yml
@ -0,0 +1,61 @@
+---
+apiVersion: gateway.networking.k8s.io/v1beta1
+kind: ReferenceGrant
+metadata:
+  name: backend-from-bar
+  namespace: bar
+spec:
+  from:
+    - group: gateway.networking.k8s.io
+      kind: HTTPRoute
+      namespace: default
+  to:
+    - group: ""
+      kind: Service
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: my-gateway-class
+spec:
+  controllerName: traefik.io/gateway-controller
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: my-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners: # Use GatewayClass defaults for listener definition.
+    - name: http
+      protocol: HTTP
+      port: 80
+      hostname: foo.example.com
+      allowedRoutes:
+        kinds:
+          - kind: HTTPRoute
+            group: gateway.networking.k8s.io
+        namespaces:
+          from: Same
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: http-app-1
+  namespace: default
+spec:
+  parentRefs:
+    - name: my-gateway
+      kind: Gateway
+      group: gateway.networking.k8s.io
+  rules:
+    - backendRefs:
+        - name: whoami-bar
+          port: 80
+          weight: 1
+          kind: Service
+          group: ""
--- a/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service_missing.yml
+++ b/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service_missing.yml
@ -0,0 +1,46 @@
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: my-gateway-class
+spec:
+  controllerName: traefik.io/gateway-controller
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: my-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners: # Use GatewayClass defaults for listener definition.
+    - name: http
+      protocol: HTTP
+      port: 80
+      hostname: foo.example.com
+      allowedRoutes:
+        kinds:
+          - kind: HTTPRoute
+            group: gateway.networking.k8s.io
+        namespaces:
+          from: Same
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: http-app-1
+  namespace: default
+spec:
+  parentRefs:
+    - name: my-gateway
+      kind: Gateway
+      group: gateway.networking.k8s.io
+  rules:
+    - backendRefs:
+        - name: whoami-bar
+          port: 80
+          weight: 1
+          kind: Service
+          group: ""
--- a/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service_not_matching_from.yml
+++ b/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service_not_matching_from.yml
@ -0,0 +1,61 @@
+---
+apiVersion: gateway.networking.k8s.io/v1beta1
+kind: ReferenceGrant
+metadata:
+  name: backend-from-bar
+  namespace: bar
+spec:
+  from:
+    - group: gateway.networking.k8s.io
+      kind: HTTPRoute
+      namespace: anothernamespce
+  to:
+    - group: ""
+      kind: Service
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: my-gateway-class
+spec:
+  controllerName: traefik.io/gateway-controller
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: my-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners: # Use GatewayClass defaults for listener definition.
+    - name: http
+      protocol: HTTP
+      port: 80
+      hostname: foo.example.com
+      allowedRoutes:
+        kinds:
+          - kind: HTTPRoute
+            group: gateway.networking.k8s.io
+        namespaces:
+          from: Same
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: http-app-1
+  namespace: default
+spec:
+  parentRefs:
+    - name: my-gateway
+      kind: Gateway
+      group: gateway.networking.k8s.io
+  rules:
+    - backendRefs:
+        - name: whoami-bar
+          port: 80
+          weight: 1
+          kind: Service
+          group: ""
--- a/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service_not_matching_to.yml
+++ b/pkg/provider/kubernetes/gateway/fixtures/referencegrant/for_service_not_matching_to.yml
@ -0,0 +1,62 @@
+---
+apiVersion: gateway.networking.k8s.io/v1beta1
+kind: ReferenceGrant
+metadata:
+  name: backend-from-bar
+  namespace: bar
+spec:
+  from:
+    - group: gateway.networking.k8s.io
+      kind: HTTPRoute
+      namespace: default
+  to:
+    - group: ""
+      kind: Service
+      name: differentservice
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: my-gateway-class
+spec:
+  controllerName: traefik.io/gateway-controller
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: my-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners: # Use GatewayClass defaults for listener definition.
+    - name: http
+      protocol: HTTP
+      port: 80
+      hostname: foo.example.com
+      allowedRoutes:
+        kinds:
+          - kind: HTTPRoute
+            group: gateway.networking.k8s.io
+        namespaces:
+          from: Same
+
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: http-app-1
+  namespace: default
+spec:
+  parentRefs:
+    - name: my-gateway
+      kind: Gateway
+      group: gateway.networking.k8s.io
+  rules:
+    - backendRefs:
+        - name: whoami-bar
+          port: 80
+          weight: 1
+          kind: Service
+          group: ""
--- a/pkg/provider/kubernetes/gateway/httproute.go
+++ b/pkg/provider/kubernetes/gateway/httproute.go
@ -41,64 +41,45 @@ func (p *Provider) loadHTTPRoutes(ctx context.Context, client Client, gatewayLis
 				Conditions: []metav1.Condition{
 					{
 						Type:               string(gatev1.RouteConditionAccepted),
-						Status:             metav1.ConditionTrue,
+						Status:             metav1.ConditionFalse,
 						ObservedGeneration: route.Generation,
 						LastTransitionTime: metav1.Now(),
-						Reason:             string(gatev1.RouteReasonAccepted),
+						Reason:             string(gatev1.RouteReasonNoMatchingParent),
 					},
 				},
 			}

-			var attachedListeners bool
-			notAcceptedReason := gatev1.RouteReasonNoMatchingParent
 			for _, listener := range gatewayListeners {
 				if !matchListener(listener, route.Namespace, parentRef) {
 					continue
 				}

+				accepted := true
 				if !allowRoute(listener, route.Namespace, kindHTTPRoute) {
-					notAcceptedReason = gatev1.RouteReasonNotAllowedByListeners
-					continue
+					parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonNotAllowedByListeners))
+					accepted = false
 				}
-
 				hostnames, ok := findMatchingHostnames(listener.Hostname, route.Spec.Hostnames)
 				if !ok {
-					notAcceptedReason = gatev1.RouteReasonNoMatchingListenerHostname
-					continue
+					parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonNoMatchingListenerHostname))
+					accepted = false
 				}

-				listener.Status.AttachedRoutes++
-
-				// TODO should we build the conf if the listener is not attached
-				// only consider the route attached if the listener is in an "attached" state.
-				if listener.Attached {
-					attachedListeners = true
+				if accepted {
+					// Gateway listener should have AttachedRoutes set even when Gateway has unresolved refs.
+					listener.Status.AttachedRoutes++
+					// Only consider the route attached if the listener is in an "attached" state.
+					if listener.Attached {
+						parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonAccepted))
+					}
 				}
-				resolveConditions := p.loadHTTPRoute(logger.WithContext(ctx), client, listener, route, hostnames, conf)

-				// TODO: handle more accurately route conditions (in case of multiple listener matching).
-				for _, condition := range resolveConditions {
-					parentStatus.Conditions = appendCondition(parentStatus.Conditions, condition)
+				routeConf, resolveRefCondition := p.loadHTTPRoute(logger.WithContext(ctx), client, listener, route, hostnames)
+				if accepted && listener.Attached {
+					mergeHTTPConfiguration(routeConf, conf)
 				}
-			}

-			if !attachedListeners {
-				parentStatus.Conditions = []metav1.Condition{
-					{
-						Type:               string(gatev1.RouteConditionAccepted),
-						Status:             metav1.ConditionFalse,
-						ObservedGeneration: route.Generation,
-						LastTransitionTime: metav1.Now(),
-						Reason:             string(notAcceptedReason),
-					},
-					{
-						Type:               string(gatev1.RouteConditionResolvedRefs),
-						Status:             metav1.ConditionFalse,
-						ObservedGeneration: route.Generation,
-						LastTransitionTime: metav1.Now(),
-						Reason:             string(gatev1.RouteReasonRefNotPermitted),
-					},
-				}
+				parentStatus.Conditions = upsertRouteConditionResolvedRefs(parentStatus.Conditions, resolveRefCondition)
 			}

 			parentStatuses = append(parentStatuses, *parentStatus)
@ -117,17 +98,24 @@ func (p *Provider) loadHTTPRoutes(ctx context.Context, client Client, gatewayLis
 	}
 }

-func (p *Provider) loadHTTPRoute(ctx context.Context, client Client, listener gatewayListener, route *gatev1.HTTPRoute, hostnames []gatev1.Hostname, conf *dynamic.Configuration) []metav1.Condition {
-	routeConditions := []metav1.Condition{
-		{
-			Type:               string(gatev1.RouteConditionResolvedRefs),
-			Status:             metav1.ConditionTrue,
-			ObservedGeneration: route.Generation,
-			LastTransitionTime: metav1.Now(),
-			Reason:             string(gatev1.RouteConditionResolvedRefs),
+func (p *Provider) loadHTTPRoute(ctx context.Context, client Client, listener gatewayListener, route *gatev1.HTTPRoute, hostnames []gatev1.Hostname) (*dynamic.Configuration, metav1.Condition) {
+	routeConf := &dynamic.Configuration{
+		HTTP: &dynamic.HTTPConfiguration{
+			Routers:           make(map[string]*dynamic.Router),
+			Middlewares:       make(map[string]*dynamic.Middleware),
+			Services:          make(map[string]*dynamic.Service),
+			ServersTransports: make(map[string]*dynamic.ServersTransport),
 		},
 	}

+	routeCondition := metav1.Condition{
+		Type:               string(gatev1.RouteConditionResolvedRefs),
+		Status:             metav1.ConditionTrue,
+		ObservedGeneration: route.Generation,
+		LastTransitionTime: metav1.Now(),
+		Reason:             string(gatev1.RouteConditionResolvedRefs),
+	}
+
 	for _, routeRule := range route.Spec.Rules {
 		rule, priority := buildRouterRule(hostnames, routeRule.Matches)
 		router := dynamic.Router{
@ -159,14 +147,14 @@ func (p *Provider) loadHTTPRoute(ctx context.Context, client Client, listener ga
 				Weight: ptr.To(1),
 			})

-			conf.HTTP.Services[wrrName] = &dynamic.Service{Weighted: &wrr}
+			routeConf.HTTP.Services[wrrName] = &dynamic.Service{Weighted: &wrr}
 			router.Service = wrrName
 		} else {
 			for name, middleware := range middlewares {
 				// If the middleware config is nil in the return of the loadMiddlewares function,
 				// it means that we just need a reference to that middleware.
 				if middleware != nil {
-					conf.HTTP.Middlewares[name] = middleware
+					routeConf.HTTP.Middlewares[name] = middleware
 				}

 				router.Middlewares = append(router.Middlewares, name)
@ -180,7 +168,7 @@ func (p *Provider) loadHTTPRoute(ctx context.Context, client Client, listener ga
 					name, svc, errCondition := p.loadHTTPService(client, route, backendRef)
 					weight := ptr.To(int(ptr.Deref(backendRef.Weight, 1)))
 					if errCondition != nil {
-						routeConditions = appendCondition(routeConditions, *errCondition)
+						routeCondition = *errCondition
 						wrr.Services = append(wrr.Services, dynamic.WRRService{
 							Name:   name,
 							Status: ptr.To(500),
@ -190,7 +178,7 @@ func (p *Provider) loadHTTPRoute(ctx context.Context, client Client, listener ga
 					}

 					if svc != nil {
-						conf.HTTP.Services[name] = svc
+						routeConf.HTTP.Services[name] = svc
 					}

 					wrr.Services = append(wrr.Services, dynamic.WRRService{
@ -199,7 +187,7 @@ func (p *Provider) loadHTTPRoute(ctx context.Context, client Client, listener ga
 					})
 				}

-				conf.HTTP.Services[wrrName] = &dynamic.Service{Weighted: &wrr}
+				routeConf.HTTP.Services[wrrName] = &dynamic.Service{Weighted: &wrr}
 				router.Service = wrrName
 			}
 		}
@ -208,39 +196,42 @@ func (p *Provider) loadHTTPRoute(ctx context.Context, client Client, listener ga
 		p.applyRouterTransform(ctx, rt, route)

 		routerKey = provider.Normalize(routerKey)
-		conf.HTTP.Routers[routerKey] = rt
+		routeConf.HTTP.Routers[routerKey] = rt
 	}

-	return routeConditions
+	return routeConf, routeCondition
 }

 // loadHTTPService returns a dynamic.Service config corresponding to the given gatev1.HTTPBackendRef.
 // Note that the returned dynamic.Service config can be nil (for cross-provider, internal services, and backendFunc).
 func (p *Provider) loadHTTPService(client Client, route *gatev1.HTTPRoute, backendRef gatev1.HTTPBackendRef) (string, *dynamic.Service, *metav1.Condition) {
+	kind := ptr.Deref(backendRef.Kind, "Service")
+
 	group := groupCore
 	if backendRef.Group != nil && *backendRef.Group != "" {
 		group = string(*backendRef.Group)
 	}

-	kind := ptr.Deref(backendRef.Kind, "Service")
-	namespace := ptr.Deref(backendRef.Namespace, gatev1.Namespace(route.Namespace))
-	namespaceStr := string(namespace)
-	serviceName := provider.Normalize(makeID(namespaceStr, string(backendRef.Name)))
+	namespace := route.Namespace
+	if backendRef.Namespace != nil && *backendRef.Namespace != "" {
+		namespace = string(*backendRef.Namespace)
+	}

-	// TODO support cross namespace through ReferenceGrant.
-	if namespaceStr != route.Namespace {
+	serviceName := provider.Normalize(makeID(namespace, string(backendRef.Name)))
+
+	if err := isReferenceGranted(client, groupGateway, kindHTTPRoute, route.Namespace, group, string(kind), string(backendRef.Name), namespace); err != nil {
 		return serviceName, nil, &metav1.Condition{
 			Type:               string(gatev1.RouteConditionResolvedRefs),
 			Status:             metav1.ConditionFalse,
 			ObservedGeneration: route.Generation,
 			LastTransitionTime: metav1.Now(),
 			Reason:             string(gatev1.RouteReasonRefNotPermitted),
-			Message:            fmt.Sprintf("Cannot load HTTPBackendRef %s/%s/%s/%s namespace not allowed", group, kind, namespace, backendRef.Name),
+			Message:            fmt.Sprintf("Cannot load HTTPBackendRef %s/%s/%s/%s: %s", group, kind, namespace, backendRef.Name, err),
 		}
 	}

 	if group != groupCore || kind != "Service" {
-		name, service, err := p.loadHTTPBackendRef(namespaceStr, backendRef)
+		name, service, err := p.loadHTTPBackendRef(namespace, backendRef)
 		if err != nil {
 			return serviceName, nil, &metav1.Condition{
 				Type:               string(gatev1.RouteConditionResolvedRefs),
@ -270,7 +261,7 @@ func (p *Provider) loadHTTPService(client Client, route *gatev1.HTTPRoute, backe
 	portStr := strconv.FormatInt(int64(port), 10)
 	serviceName = provider.Normalize(serviceName + "-" + portStr)

-	lb, err := loadHTTPServers(client, namespaceStr, backendRef)
+	lb, err := loadHTTPServers(client, namespace, backendRef)
 	if err != nil {
 		return serviceName, nil, &metav1.Condition{
 			Type:               string(gatev1.RouteConditionResolvedRefs),
@ -615,3 +606,35 @@ func getProtocol(portSpec corev1.ServicePort) string {

 	return protocol
 }
+
+func mergeHTTPConfiguration(from, to *dynamic.Configuration) {
+	if from == nil || from.HTTP == nil || to == nil {
+		return
+	}
+
+	if to.HTTP == nil {
+		to.HTTP = from.HTTP
+		return
+	}
+
+	if to.HTTP.Routers == nil {
+		to.HTTP.Routers = map[string]*dynamic.Router{}
+	}
+	for routerName, router := range from.HTTP.Routers {
+		to.HTTP.Routers[routerName] = router
+	}
+
+	if to.HTTP.Middlewares == nil {
+		to.HTTP.Middlewares = map[string]*dynamic.Middleware{}
+	}
+	for middlewareName, middleware := range from.HTTP.Middlewares {
+		to.HTTP.Middlewares[middlewareName] = middleware
+	}
+
+	if to.HTTP.Services == nil {
+		to.HTTP.Services = map[string]*dynamic.Service{}
+	}
+	for serviceName, service := range from.HTTP.Services {
+		to.HTTP.Services[serviceName] = service
+	}
+}
--- a/pkg/provider/kubernetes/gateway/kubernetes.go
+++ b/pkg/provider/kubernetes/gateway/kubernetes.go
@ -37,7 +37,8 @@ const (
 	providerName   = "kubernetesgateway"
 	controllerName = "traefik.io/gateway-controller"

-	groupCore = "core"
+	groupCore    = "core"
+	groupGateway = "gateway.networking.k8s.io"

 	kindGateway        = "Gateway"
 	kindTraefikService = "TraefikService"
@ -564,35 +565,17 @@ func (p *Provider) loadGatewayListeners(ctx context.Context, client Client, gate
 					certificateNamespace = string(*certificateRef.Namespace)
 				}

-				if certificateNamespace != gateway.Namespace {
-					referenceGrants, err := client.ListReferenceGrants(certificateNamespace)
-					if err != nil {
-						gatewayListeners[i].Status.Conditions = append(gatewayListeners[i].Status.Conditions, metav1.Condition{
-							Type:               string(gatev1.ListenerConditionResolvedRefs),
-							Status:             metav1.ConditionFalse,
-							ObservedGeneration: gateway.Generation,
-							LastTransitionTime: metav1.Now(),
-							Reason:             string(gatev1.ListenerReasonRefNotPermitted),
-							Message:            fmt.Sprintf("Cannot find any ReferenceGrant: %v", err),
-						})
+				if err := isReferenceGranted(client, groupGateway, kindGateway, gateway.Namespace, groupCore, "Secret", string(certificateRef.Name), certificateNamespace); err != nil {
+					gatewayListeners[i].Status.Conditions = append(gatewayListeners[i].Status.Conditions, metav1.Condition{
+						Type:               string(gatev1.ListenerConditionResolvedRefs),
+						Status:             metav1.ConditionFalse,
+						ObservedGeneration: gateway.Generation,
+						LastTransitionTime: metav1.Now(),
+						Reason:             string(gatev1.ListenerReasonRefNotPermitted),
+						Message:            fmt.Sprintf("Cannot load CertificateRef %s/%s: %s", certificateNamespace, certificateRef.Name, err),
+					})

-						continue
-					}
-
-					referenceGrants = filterReferenceGrantsFrom(referenceGrants, "gateway.networking.k8s.io", "Gateway", gateway.Namespace)
-					referenceGrants = filterReferenceGrantsTo(referenceGrants, groupCore, "Secret", string(certificateRef.Name))
-					if len(referenceGrants) == 0 {
-						gatewayListeners[i].Status.Conditions = append(gatewayListeners[i].Status.Conditions, metav1.Condition{
-							Type:               string(gatev1.ListenerConditionResolvedRefs),
-							Status:             metav1.ConditionFalse,
-							ObservedGeneration: gateway.Generation,
-							LastTransitionTime: metav1.Now(),
-							Reason:             string(gatev1.ListenerReasonRefNotPermitted),
-							Message:            "Required ReferenceGrant for cross namespace secret reference is missing",
-						})
-
-						continue
-					}
+					continue
 				}

 				configKey := certificateNamespace + "/" + string(certificateRef.Name)
@ -1006,8 +989,8 @@ func makeID(namespace, name string) string {
 	return namespace + "-" + name
 }

-func getTLS(k8sClient Client, secretName gatev1.ObjectName, namespace string) (*tls.CertAndStores, error) {
-	secret, exists, err := k8sClient.GetSecret(namespace, string(secretName))
+func getTLS(client Client, secretName gatev1.ObjectName, namespace string) (*tls.CertAndStores, error) {
+	secret, exists, err := client.GetSecret(namespace, string(secretName))
 	if err != nil {
 		return nil, fmt.Errorf("failed to fetch secret %s/%s: %w", namespace, secretName, err)
 	}
@ -1131,6 +1114,25 @@ func makeListenerKey(l gatev1.Listener) string {
 	return fmt.Sprintf("%s|%s|%d", l.Protocol, hostname, l.Port)
 }

+func isReferenceGranted(client Client, fromGroup, fromKind, fromNamespace, toGroup, toKind, toName, toNamespace string) error {
+	if toNamespace == fromNamespace {
+		return nil
+	}
+
+	refGrants, err := client.ListReferenceGrants(toNamespace)
+	if err != nil {
+		return fmt.Errorf("listing ReferenceGrant: %w", err)
+	}
+
+	refGrants = filterReferenceGrantsFrom(refGrants, fromGroup, fromKind, fromNamespace)
+	refGrants = filterReferenceGrantsTo(refGrants, toGroup, toKind, toName)
+	if len(refGrants) == 0 {
+		return errors.New("missing ReferenceGrant")
+	}
+
+	return nil
+}
+
 func filterReferenceGrantsFrom(referenceGrants []*gatev1beta1.ReferenceGrant, group, kind, namespace string) []*gatev1beta1.ReferenceGrant {
 	var matchingReferenceGrants []*gatev1beta1.ReferenceGrant
 	for _, referenceGrant := range referenceGrants {
@ -1193,13 +1195,38 @@ func kindToString(p *gatev1.Kind) string {
 	return string(*p)
 }

-func appendCondition(conditions []metav1.Condition, condition metav1.Condition) []metav1.Condition {
-	res := []metav1.Condition{condition}
+func updateRouteConditionAccepted(conditions []metav1.Condition, reason string) []metav1.Condition {
+	var conds []metav1.Condition
 	for _, c := range conditions {
-		if c.Type != condition.Type {
-			res = append(res, c)
+		if c.Type == string(gatev1.RouteConditionAccepted) && c.Status != metav1.ConditionTrue {
+			c.Reason = reason
+			c.LastTransitionTime = metav1.Now()
+
+			if reason == string(gatev1.RouteReasonAccepted) {
+				c.Status = metav1.ConditionTrue
+			}
 		}
+
+		conds = append(conds, c)
 	}

-	return res
+	return conds
+}
+
+func upsertRouteConditionResolvedRefs(conditions []metav1.Condition, condition metav1.Condition) []metav1.Condition {
+	var (
+		curr  *metav1.Condition
+		conds []metav1.Condition
+	)
+	for _, c := range conditions {
+		if c.Type == string(gatev1.RouteConditionResolvedRefs) {
+			curr = &c
+			continue
+		}
+		conds = append(conds, c)
+	}
+	if curr != nil && curr.Status == metav1.ConditionFalse && condition.Status == metav1.ConditionTrue {
+		return append(conds, *curr)
+	}
+	return append(conds, condition)
 }
--- a/pkg/provider/kubernetes/gateway/kubernetes_test.go
+++ b/pkg/provider/kubernetes/gateway/kubernetes_test.go
@ -5422,7 +5422,7 @@ func TestLoadRoutesWithReferenceGrants(t *testing.T) {
 			},
 		},
 		{
-			desc:  "Empty because ReferenceGrant spec.from does not match",
+			desc:  "Empty because ReferenceGrant spec.from does not match secret",
 			paths: []string{"services.yml", "referencegrant/for_secret_not_matching_from.yml"},
 			entryPoints: map[string]Entrypoint{
 				"tls": {Address: ":9000"},
@ -5448,7 +5448,7 @@ func TestLoadRoutesWithReferenceGrants(t *testing.T) {
 			},
 		},
 		{
-			desc:  "Empty because ReferenceGrant spec.to does not match",
+			desc:  "Empty because ReferenceGrant spec.to does not match secret",
 			paths: []string{"services.yml", "referencegrant/for_secret_not_matching_to.yml"},
 			entryPoints: map[string]Entrypoint{
 				"tls": {Address: ":9000"},
@ -5538,6 +5538,130 @@ func TestLoadRoutesWithReferenceGrants(t *testing.T) {
 				},
 			},
 		},
+		{
+			desc:  "Empty because ReferenceGrant for Service is missing",
+			paths: []string{"services.yml", "referencegrant/for_secret_missing.yml"},
+			entryPoints: map[string]Entrypoint{
+				"tls": {Address: ":9000"},
+			},
+			expected: &dynamic.Configuration{
+				UDP: &dynamic.UDPConfiguration{
+					Routers:  map[string]*dynamic.UDPRouter{},
+					Services: map[string]*dynamic.UDPService{},
+				},
+				TCP: &dynamic.TCPConfiguration{
+					Routers:           map[string]*dynamic.TCPRouter{},
+					Middlewares:       map[string]*dynamic.TCPMiddleware{},
+					Services:          map[string]*dynamic.TCPService{},
+					ServersTransports: map[string]*dynamic.TCPServersTransport{},
+				},
+				HTTP: &dynamic.HTTPConfiguration{
+					Routers:           map[string]*dynamic.Router{},
+					Middlewares:       map[string]*dynamic.Middleware{},
+					Services:          map[string]*dynamic.Service{},
+					ServersTransports: map[string]*dynamic.ServersTransport{},
+				},
+				TLS: &dynamic.TLSConfiguration{},
+			},
+		},
+		{
+			desc:  "Empty because ReferenceGrant spec.from does not match service",
+			paths: []string{"services.yml", "referencegrant/for_service_not_matching_from.yml"},
+			entryPoints: map[string]Entrypoint{
+				"tls": {Address: ":9000"},
+			},
+			expected: &dynamic.Configuration{
+				UDP: &dynamic.UDPConfiguration{
+					Routers:  map[string]*dynamic.UDPRouter{},
+					Services: map[string]*dynamic.UDPService{},
+				},
+				TCP: &dynamic.TCPConfiguration{
+					Routers:           map[string]*dynamic.TCPRouter{},
+					Middlewares:       map[string]*dynamic.TCPMiddleware{},
+					Services:          map[string]*dynamic.TCPService{},
+					ServersTransports: map[string]*dynamic.TCPServersTransport{},
+				},
+				HTTP: &dynamic.HTTPConfiguration{
+					Routers:           map[string]*dynamic.Router{},
+					Middlewares:       map[string]*dynamic.Middleware{},
+					Services:          map[string]*dynamic.Service{},
+					ServersTransports: map[string]*dynamic.ServersTransport{},
+				},
+				TLS: &dynamic.TLSConfiguration{},
+			},
+		},
+		{
+			desc:  "Empty because ReferenceGrant spec.to does not match service",
+			paths: []string{"services.yml", "referencegrant/for_service_not_matching_to.yml"},
+			entryPoints: map[string]Entrypoint{
+				"tls": {Address: ":9000"},
+			},
+			expected: &dynamic.Configuration{
+				UDP: &dynamic.UDPConfiguration{
+					Routers:  map[string]*dynamic.UDPRouter{},
+					Services: map[string]*dynamic.UDPService{},
+				},
+				TCP: &dynamic.TCPConfiguration{
+					Routers:           map[string]*dynamic.TCPRouter{},
+					Middlewares:       map[string]*dynamic.TCPMiddleware{},
+					Services:          map[string]*dynamic.TCPService{},
+					ServersTransports: map[string]*dynamic.TCPServersTransport{},
+				},
+				HTTP: &dynamic.HTTPConfiguration{
+					Routers:           map[string]*dynamic.Router{},
+					Middlewares:       map[string]*dynamic.Middleware{},
+					Services:          map[string]*dynamic.Service{},
+					ServersTransports: map[string]*dynamic.ServersTransport{},
+				},
+				TLS: &dynamic.TLSConfiguration{},
+			},
+		},
+		{
+			desc:  "For Service",
+			paths: []string{"services.yml", "referencegrant/for_service.yml"},
+			entryPoints: map[string]Entrypoint{
+				"http": {Address: ":80"},
+			},
+			expected: &dynamic.Configuration{
+				UDP: &dynamic.UDPConfiguration{
+					Routers:  map[string]*dynamic.UDPRouter{},
+					Services: map[string]*dynamic.UDPService{},
+				},
+				TCP: &dynamic.TCPConfiguration{
+					Routers:           map[string]*dynamic.TCPRouter{},
+					Middlewares:       map[string]*dynamic.TCPMiddleware{},
+					Services:          map[string]*dynamic.TCPService{},
+					ServersTransports: map[string]*dynamic.TCPServersTransport{},
+				},
+				HTTP: &dynamic.HTTPConfiguration{
+					Routers: map[string]*dynamic.Router{
+						"default-http-app-1-my-gateway-http-f381ad97110137b4d42c": {
+							EntryPoints: []string{"http"},
+							Rule:        "Host(`foo.example.com`)",
+							Service:     "default-http-app-1-my-gateway-http-f381ad97110137b4d42c-wrr",
+							RuleSyntax:  "v3",
+							Priority:    15,
+						},
+					},
+					Middlewares: map[string]*dynamic.Middleware{},
+					Services: map[string]*dynamic.Service{
+						"default-http-app-1-my-gateway-http-f381ad97110137b4d42c-wrr": {
+							Weighted: &dynamic.WeightedRoundRobin{
+								Services: []dynamic.WRRService{
+									{
+										Name:   "default-whoami-bar-80",
+										Weight: ptr.To(1),
+										Status: ptr.To(500),
+									},
+								},
+							},
+						},
+					},
+					ServersTransports: map[string]*dynamic.ServersTransport{},
+				},
+				TLS: &dynamic.TLSConfiguration{},
+			},
+		},
 	}

 	for _, test := range testCases {
@ -6433,6 +6557,136 @@ func Test_gatewayAddresses(t *testing.T) {
 	}
 }

+func Test_upsertRouteConditionResolvedRefs(t *testing.T) {
+	testCases := []struct {
+		desc           string
+		conditions     []metav1.Condition
+		condition      metav1.Condition
+		wantConditions []metav1.Condition
+	}{
+		{
+			desc: "True to False",
+			conditions: []metav1.Condition{
+				{
+					Type:    "foo",
+					Status:  "bar",
+					Reason:  "baz",
+					Message: "foobarbaz",
+				},
+				{
+					Type:    string(gatev1.RouteConditionResolvedRefs),
+					Status:  metav1.ConditionTrue,
+					Reason:  "foo",
+					Message: "foo",
+				},
+			},
+			condition: metav1.Condition{
+				Type:    string(gatev1.RouteConditionResolvedRefs),
+				Status:  metav1.ConditionFalse,
+				Reason:  "bar",
+				Message: "bar",
+			},
+			wantConditions: []metav1.Condition{
+				{
+					Type:    "foo",
+					Status:  "bar",
+					Reason:  "baz",
+					Message: "foobarbaz",
+				},
+				{
+					Type:    string(gatev1.RouteConditionResolvedRefs),
+					Status:  metav1.ConditionFalse,
+					Reason:  "bar",
+					Message: "bar",
+				},
+			},
+		},
+		{
+			desc: "False to False",
+			conditions: []metav1.Condition{
+				{
+					Type:    "foo",
+					Status:  "bar",
+					Reason:  "baz",
+					Message: "foobarbaz",
+				},
+				{
+					Type:    string(gatev1.RouteConditionResolvedRefs),
+					Status:  metav1.ConditionFalse,
+					Reason:  "foo",
+					Message: "foo",
+				},
+			},
+			condition: metav1.Condition{
+				Type:    string(gatev1.RouteConditionResolvedRefs),
+				Status:  metav1.ConditionFalse,
+				Reason:  "bar",
+				Message: "bar",
+			},
+			wantConditions: []metav1.Condition{
+				{
+					Type:    "foo",
+					Status:  "bar",
+					Reason:  "baz",
+					Message: "foobarbaz",
+				},
+				{
+					Type:    string(gatev1.RouteConditionResolvedRefs),
+					Status:  metav1.ConditionFalse,
+					Reason:  "bar",
+					Message: "bar",
+				},
+			},
+		},
+		{
+			desc: "False to True: no upsert",
+			conditions: []metav1.Condition{
+				{
+					Type:    "foo",
+					Status:  "bar",
+					Reason:  "baz",
+					Message: "foobarbaz",
+				},
+				{
+					Type:    string(gatev1.RouteConditionResolvedRefs),
+					Status:  metav1.ConditionFalse,
+					Reason:  "foo",
+					Message: "foo",
+				},
+			},
+			condition: metav1.Condition{
+				Type:    string(gatev1.RouteConditionResolvedRefs),
+				Status:  metav1.ConditionTrue,
+				Reason:  "bar",
+				Message: "bar",
+			},
+			wantConditions: []metav1.Condition{
+				{
+					Type:    "foo",
+					Status:  "bar",
+					Reason:  "baz",
+					Message: "foobarbaz",
+				},
+				{
+					Type:    string(gatev1.RouteConditionResolvedRefs),
+					Status:  metav1.ConditionFalse,
+					Reason:  "foo",
+					Message: "foo",
+				},
+			},
+		},
+	}
+
+	for _, test := range testCases {
+		t.Run(test.desc, func(t *testing.T) {
+			t.Parallel()
+
+			got := upsertRouteConditionResolvedRefs(test.conditions, test.condition)
+			assert.Equal(t, test.wantConditions, got)
+		})
+	}
+}
+
 // We cannot use the gateway-api fake.NewSimpleClientset due to Gateway being pluralized as "gatewaies" instead of "gateways".
 func newGatewaySimpleClientSet(t *testing.T, objects ...runtime.Object) *gatefake.Clientset {
 	t.Helper()
--- a/pkg/provider/kubernetes/gateway/tcproute.go
+++ b/pkg/provider/kubernetes/gateway/tcproute.go
@ -22,7 +22,8 @@ func (p *Provider) loadTCPRoutes(ctx context.Context, client Client, gatewayList
 	logger := log.Ctx(ctx)
 	routes, err := client.ListTCPRoutes()
 	if err != nil {
-		logger.Error().Err(err).Msgf("Get TCPRoutes: %s", err)
+		logger.Error().Err(err).Msgf("Unable to list TCPRoutes")
+		return
 	}

 	for _, route := range routes {
@ -34,39 +35,6 @@ func (p *Provider) loadTCPRoutes(ctx context.Context, client Client, gatewayList
 				ParentRef:      parentRef,
 				ControllerName: controllerName,
 				Conditions: []metav1.Condition{
-					{
-						Type:               string(gatev1.RouteConditionAccepted),
-						Status:             metav1.ConditionTrue,
-						ObservedGeneration: route.Generation,
-						LastTransitionTime: metav1.Now(),
-						Reason:             string(gatev1.RouteReasonAccepted),
-					},
-				},
-			}
-
-			var attachedListeners bool
-			for _, listener := range gatewayListeners {
-				if !matchListener(listener, route.Namespace, parentRef) {
-					continue
-				}
-
-				if !allowRoute(listener, route.Namespace, kindTCPRoute) {
-					continue
-				}
-
-				listener.Status.AttachedRoutes++
-				attachedListeners = true
-
-				resolveConditions := p.loadTCPRoute(client, listener, route, conf)
-
-				// TODO: handle more accurately route conditions (in case of multiple listener matching).
-				for _, condition := range resolveConditions {
-					parentStatus.Conditions = appendCondition(parentStatus.Conditions, condition)
-				}
-			}
-
-			if !attachedListeners {
-				parentStatus.Conditions = []metav1.Condition{
 					{
 						Type:               string(gatev1.RouteConditionAccepted),
 						Status:             metav1.ConditionFalse,
@ -74,7 +42,33 @@ func (p *Provider) loadTCPRoutes(ctx context.Context, client Client, gatewayList
 						LastTransitionTime: metav1.Now(),
 						Reason:             string(gatev1.RouteReasonNoMatchingParent),
 					},
+				},
+			}
+
+			for _, listener := range gatewayListeners {
+				if !matchListener(listener, route.Namespace, parentRef) {
+					continue
 				}
+
+				accepted := true
+				if !allowRoute(listener, route.Namespace, kindTCPRoute) {
+					parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonNotAllowedByListeners))
+					accepted = false
+				}
+
+				if accepted {
+					listener.Status.AttachedRoutes++
+					// only consider the route attached if the listener is in an "attached" state.
+					if listener.Attached {
+						parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonAccepted))
+					}
+				}
+
+				routeConf, resolveRefCondition := p.loadTCPRoute(client, listener, route)
+				if accepted && listener.Attached {
+					mergeTCPConfiguration(routeConf, conf)
+				}
+				parentStatus.Conditions = upsertRouteConditionResolvedRefs(parentStatus.Conditions, resolveRefCondition)
 			}

 			parentStatuses = append(parentStatuses, *parentStatus)
@ -93,17 +87,24 @@ func (p *Provider) loadTCPRoutes(ctx context.Context, client Client, gatewayList
 	}
 }

-func (p *Provider) loadTCPRoute(client Client, listener gatewayListener, route *gatev1alpha2.TCPRoute, conf *dynamic.Configuration) []metav1.Condition {
-	routeConditions := []metav1.Condition{
-		{
-			Type:               string(gatev1.RouteConditionResolvedRefs),
-			Status:             metav1.ConditionTrue,
-			ObservedGeneration: route.Generation,
-			LastTransitionTime: metav1.Now(),
-			Reason:             string(gatev1.RouteConditionResolvedRefs),
+func (p *Provider) loadTCPRoute(client Client, listener gatewayListener, route *gatev1alpha2.TCPRoute) (*dynamic.Configuration, metav1.Condition) {
+	routeConf := &dynamic.Configuration{
+		TCP: &dynamic.TCPConfiguration{
+			Routers:           make(map[string]*dynamic.TCPRouter),
+			Middlewares:       make(map[string]*dynamic.TCPMiddleware),
+			Services:          make(map[string]*dynamic.TCPService),
+			ServersTransports: make(map[string]*dynamic.TCPServersTransport),
 		},
 	}

+	routeCondition := metav1.Condition{
+		Type:               string(gatev1.RouteConditionResolvedRefs),
+		Status:             metav1.ConditionTrue,
+		ObservedGeneration: route.Generation,
+		LastTransitionTime: metav1.Now(),
+		Reason:             string(gatev1.RouteConditionResolvedRefs),
+	}
+
 	router := dynamic.TCPRouter{
 		Rule:        "HostSNI(`*`)",
 		EntryPoints: []string{listener.EPName},
@ -131,31 +132,30 @@ func (p *Provider) loadTCPRoute(client Client, listener gatewayListener, route *

 		wrrService, subServices, err := loadTCPServices(client, route.Namespace, rule.BackendRefs)
 		if err != nil {
-			routeConditions = appendCondition(routeConditions, metav1.Condition{
+			return routeConf, metav1.Condition{
 				Type:               string(gatev1.RouteConditionResolvedRefs),
 				Status:             metav1.ConditionFalse,
 				ObservedGeneration: route.Generation,
 				LastTransitionTime: metav1.Now(),
 				Reason:             string(gatev1.RouteReasonBackendNotFound),
 				Message:            fmt.Sprintf("Cannot load TCPRoute service %s/%s: %v", route.Namespace, route.Name, err),
-			})
-			return routeConditions
+			}
 		}

 		for svcName, svc := range subServices {
-			conf.TCP.Services[svcName] = svc
+			routeConf.TCP.Services[svcName] = svc
 		}

 		serviceName := fmt.Sprintf("%s-wrr-%d", routerKey, i)
-		conf.TCP.Services[serviceName] = wrrService
+		routeConf.TCP.Services[serviceName] = wrrService

 		ruleServiceNames = append(ruleServiceNames, serviceName)
 	}

 	if len(ruleServiceNames) == 1 {
 		router.Service = ruleServiceNames[0]
-		conf.TCP.Routers[routerKey] = &router
-		return routeConditions
+		routeConf.TCP.Routers[routerKey] = &router
+		return routeConf, routeCondition
 	}

 	routeServiceKey := routerKey + "-wrr"
@ -168,12 +168,12 @@ func (p *Provider) loadTCPRoute(client Client, listener gatewayListener, route *
 		routeService.Weighted.Services = append(routeService.Weighted.Services, service)
 	}

-	conf.TCP.Services[routeServiceKey] = routeService
+	routeConf.TCP.Services[routeServiceKey] = routeService

 	router.Service = routeServiceKey
-	conf.TCP.Routers[routerKey] = &router
+	routeConf.TCP.Routers[routerKey] = &router

-	return routeConditions
+	return routeConf, routeCondition
 }

 // loadTCPServices is generating a WRR service, even when there is only one target.
@ -294,3 +294,35 @@ func loadTCPServices(client Client, namespace string, backendRefs []gatev1.Backe

 	return wrrSvc, services, nil
 }
+
+func mergeTCPConfiguration(from, to *dynamic.Configuration) {
+	if from == nil || from.TCP == nil || to == nil {
+		return
+	}
+
+	if to.TCP == nil {
+		to.TCP = from.TCP
+		return
+	}
+
+	if to.TCP.Routers == nil {
+		to.TCP.Routers = map[string]*dynamic.TCPRouter{}
+	}
+	for routerName, router := range from.TCP.Routers {
+		to.TCP.Routers[routerName] = router
+	}
+
+	if to.TCP.Middlewares == nil {
+		to.TCP.Middlewares = map[string]*dynamic.TCPMiddleware{}
+	}
+	for middlewareName, middleware := range from.TCP.Middlewares {
+		to.TCP.Middlewares[middlewareName] = middleware
+	}
+
+	if to.TCP.Services == nil {
+		to.TCP.Services = map[string]*dynamic.TCPService{}
+	}
+	for serviceName, service := range from.TCP.Services {
+		to.TCP.Services[serviceName] = service
+	}
+}
--- a/pkg/provider/kubernetes/gateway/tlsroute.go
+++ b/pkg/provider/kubernetes/gateway/tlsroute.go
@ -19,7 +19,8 @@ func (p *Provider) loadTLSRoutes(ctx context.Context, client Client, gatewayList
 	logger := log.Ctx(ctx)
 	routes, err := client.ListTLSRoutes()
 	if err != nil {
-		logger.Error().Err(err).Msgf("Get TLSRoutes: %s", err)
+		logger.Error().Err(err).Msgf("Unable to list TLSRoute")
+		return
 	}

 	for _, route := range routes {
@ -31,44 +32,6 @@ func (p *Provider) loadTLSRoutes(ctx context.Context, client Client, gatewayList
 				ParentRef:      parentRef,
 				ControllerName: controllerName,
 				Conditions: []metav1.Condition{
-					{
-						Type:               string(gatev1.RouteConditionAccepted),
-						Status:             metav1.ConditionTrue,
-						ObservedGeneration: route.Generation,
-						LastTransitionTime: metav1.Now(),
-						Reason:             string(gatev1.RouteReasonAccepted),
-					},
-				},
-			}
-
-			var attachedListeners bool
-			for _, listener := range gatewayListeners {
-				if !matchListener(listener, route.Namespace, parentRef) {
-					continue
-				}
-
-				if !allowRoute(listener, route.Namespace, kindTLSRoute) {
-					continue
-				}
-
-				hostnames, ok := findMatchingHostnames(listener.Hostname, route.Spec.Hostnames)
-				if !ok {
-					continue
-				}
-
-				listener.Status.AttachedRoutes++
-				attachedListeners = true
-
-				resolveConditions := p.loadTLSRoute(client, listener, route, hostnames, conf)
-
-				// TODO: handle more accurately route conditions (in case of multiple listener matching).
-				for _, condition := range resolveConditions {
-					parentStatus.Conditions = appendCondition(parentStatus.Conditions, condition)
-				}
-			}
-
-			if !attachedListeners {
-				parentStatus.Conditions = []metav1.Condition{
 					{
 						Type:               string(gatev1.RouteConditionAccepted),
 						Status:             metav1.ConditionFalse,
@ -76,7 +39,38 @@ func (p *Provider) loadTLSRoutes(ctx context.Context, client Client, gatewayList
 						LastTransitionTime: metav1.Now(),
 						Reason:             string(gatev1.RouteReasonNoMatchingParent),
 					},
+				},
+			}
+
+			for _, listener := range gatewayListeners {
+				if !matchListener(listener, route.Namespace, parentRef) {
+					continue
 				}
+
+				accepted := true
+				if !allowRoute(listener, route.Namespace, kindTLSRoute) {
+					parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonNotAllowedByListeners))
+					accepted = false
+				}
+				hostnames, ok := findMatchingHostnames(listener.Hostname, route.Spec.Hostnames)
+				if !ok {
+					parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonNoMatchingListenerHostname))
+					accepted = false
+				}
+
+				if accepted {
+					listener.Status.AttachedRoutes++
+					// only consider the route attached if the listener is in an "attached" state.
+					if listener.Attached {
+						parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonAccepted))
+					}
+				}
+
+				routeConf, resolveRefCondition := p.loadTLSRoute(client, listener, route, hostnames)
+				if accepted && listener.Attached {
+					mergeTCPConfiguration(routeConf, conf)
+				}
+				parentStatus.Conditions = upsertRouteConditionResolvedRefs(parentStatus.Conditions, resolveRefCondition)
 			}

 			parentStatuses = append(parentStatuses, *parentStatus)
@ -95,23 +89,30 @@ func (p *Provider) loadTLSRoutes(ctx context.Context, client Client, gatewayList
 	}
 }

-func (p *Provider) loadTLSRoute(client Client, listener gatewayListener, route *gatev1alpha2.TLSRoute, hostnames []gatev1.Hostname, conf *dynamic.Configuration) []metav1.Condition {
-	routeConditions := []metav1.Condition{
-		{
-			Type:               string(gatev1.RouteConditionResolvedRefs),
-			Status:             metav1.ConditionTrue,
-			ObservedGeneration: route.Generation,
-			LastTransitionTime: metav1.Now(),
-			Reason:             string(gatev1.RouteConditionResolvedRefs),
+func (p *Provider) loadTLSRoute(client Client, listener gatewayListener, route *gatev1alpha2.TLSRoute, hostnames []gatev1.Hostname) (*dynamic.Configuration, metav1.Condition) {
+	routeConf := &dynamic.Configuration{
+		TCP: &dynamic.TCPConfiguration{
+			Routers:           make(map[string]*dynamic.TCPRouter),
+			Middlewares:       make(map[string]*dynamic.TCPMiddleware),
+			Services:          make(map[string]*dynamic.TCPService),
+			ServersTransports: make(map[string]*dynamic.TCPServersTransport),
 		},
 	}

+	routeCondition := metav1.Condition{
+		Type:               string(gatev1.RouteConditionResolvedRefs),
+		Status:             metav1.ConditionTrue,
+		ObservedGeneration: route.Generation,
+		LastTransitionTime: metav1.Now(),
+		Reason:             string(gatev1.RouteConditionResolvedRefs),
+	}
+
 	router := dynamic.TCPRouter{
 		RuleSyntax:  "v3",
 		Rule:        hostSNIRule(hostnames),
 		EntryPoints: []string{listener.EPName},
 		TLS: &dynamic.RouterTCPTLSConfig{
-			Passthrough: listener.TLS.Mode != nil && *listener.TLS.Mode == gatev1.TLSModePassthrough,
+			Passthrough: listener.TLS != nil && listener.TLS.Mode != nil && *listener.TLS.Mode == gatev1.TLSModePassthrough,
 		},
 	}

@ -130,32 +131,32 @@ func (p *Provider) loadTLSRoute(client Client, listener gatewayListener, route *
 		wrrService, subServices, err := loadTCPServices(client, route.Namespace, routeRule.BackendRefs)
 		if err != nil {
 			// update "ResolvedRefs" status true with "InvalidBackendRefs" reason
-			routeConditions = appendCondition(routeConditions, metav1.Condition{
+			routeCondition = metav1.Condition{
 				Type:               string(gatev1.RouteConditionResolvedRefs),
 				Status:             metav1.ConditionFalse,
 				ObservedGeneration: route.Generation,
 				LastTransitionTime: metav1.Now(),
 				Reason:             string(gatev1.RouteReasonBackendNotFound),
 				Message:            fmt.Sprintf("Cannot load TLSRoute service %s/%s: %v", route.Namespace, route.Name, err),
-			})
+			}
 			continue
 		}

 		for svcName, svc := range subServices {
-			conf.TCP.Services[svcName] = svc
+			routeConf.TCP.Services[svcName] = svc
 		}

 		serviceName := fmt.Sprintf("%s-wrr-%d", routerKey, i)
-		conf.TCP.Services[serviceName] = wrrService
+		routeConf.TCP.Services[serviceName] = wrrService

 		ruleServiceNames = append(ruleServiceNames, serviceName)
 	}

 	if len(ruleServiceNames) == 1 {
 		router.Service = ruleServiceNames[0]
-		conf.TCP.Routers[routerKey] = &router
+		routeConf.TCP.Routers[routerKey] = &router

-		return routeConditions
+		return routeConf, routeCondition
 	}

 	routeServiceKey := routerKey + "-wrr"
@ -168,12 +169,12 @@ func (p *Provider) loadTLSRoute(client Client, listener gatewayListener, route *
 		routeService.Weighted.Services = append(routeService.Weighted.Services, service)
 	}

-	conf.TCP.Services[routeServiceKey] = routeService
+	routeConf.TCP.Services[routeServiceKey] = routeService

 	router.Service = routeServiceKey
-	conf.TCP.Routers[routerKey] = &router
+	routeConf.TCP.Routers[routerKey] = &router

-	return routeConditions
+	return routeConf, routeCondition
 }

 func hostSNIRule(hostnames []gatev1.Hostname) string {