ensuring that gateway_checks for the operator respects the hostname c…

…onfig in httproute and gateway

operator/pkg/gateway-api/routechecks/gateway_checks.go

@@ -24,6 +24,13 @@ func CheckGatewayAllowedForNamespace(input Input, parentRef gatewayv1.ParentRefe
 
 		return false, nil
 	}
+
+	hostnames := input.GetHostnames()
+	allHostnames := make(map[string]bool)
+	for _, hostname := range hostnames {
+		allHostnames[string(hostname)] = true
+	}
+
 	hasNamespaceRestriction := false
 	for _, listener := range gw.Spec.Listeners {
 
@@ -34,9 +41,22 @@ func CheckGatewayAllowedForNamespace(input Input, parentRef gatewayv1.ParentRefe
 		if listener.AllowedRoutes.Namespaces == nil {
 			continue
 		}
+
 		if parentRef.SectionName != nil && listener.Name != *parentRef.SectionName {
 			continue
 		}
+
+		if len(allHostnames) > 0 {
+			if listener.Hostname == nil {
+				continue
+			}
+
+			listenerHostname := string(*listener.Hostname)
+			if _, ok := allHostnames[listenerHostname]; !ok {
+				continue
+			}
+		}
+
 		// if gateway allows all namespaces, we do not need to check anything here
 		if *listener.AllowedRoutes.Namespaces.From == gatewayv1.NamespacesFromAll {
 			return true, nil