nit

Signed-off-by: zirain <[email protected]>

internal/gatewayapi/listener.go

@@ -25,11 +25,6 @@ import (
 	"github.com/envoyproxy/gateway/internal/utils/net"
 )
 
-const (
-	ipv4ListenerAddress = "0.0.0.0"
-	ipv6ListenerAddress = "::1"
-)
-
 var _ ListenersTranslator = (*Translator)(nil)
 
 type ListenersTranslator interface {
@@ -106,9 +101,9 @@ func (t *Translator) ProcessListeners(gateways []*GatewayContext, xdsIR resource
 				continue
 			}
 
-			address := ipv4ListenerAddress
+			address := net.IPv4ListenerAddress
 			if net.PreferIPFamily(t.IPv6First, gateway.envoyProxy) == egv1a1.IPv6 {
-				address = ipv6ListenerAddress
+				address = net.IPv6ListenerAddress
 			}
 
 			// Add the listener to the Xds IR

internal/utils/net/ip.go

@@ -12,6 +12,11 @@ import (
 	egv1a1 "github.com/envoyproxy/gateway/api/v1alpha1"
 )
 
+const (
+	IPv4ListenerAddress = "0.0.0.0"
+	IPv6ListenerAddress = "::"
+)
+
 func IsIPv6(s string) bool {
 	ip := net.ParseIP(s)
 	if ip == nil {

internal/xds/translator/listener.go

@@ -35,6 +35,7 @@ import (
 
 	egv1a1 "github.com/envoyproxy/gateway/api/v1alpha1"
 	"github.com/envoyproxy/gateway/internal/ir"
+	"github.com/envoyproxy/gateway/internal/utils/net"
 	"github.com/envoyproxy/gateway/internal/utils/protocov"
 	xdsfilters "github.com/envoyproxy/gateway/internal/xds/filters"
 )
@@ -190,10 +191,10 @@ func additionalAddressByIPFamily(currentAddress string, ipFamily *ir.IPFamily, p
 	}
 
 	if *ipFamily == ir.Dualstack {
-		additionalAddress := "::1"
+		additionalAddress := net.IPv6ListenerAddress
 		// If the current address is already IPv6, use the IPv4 equivalent
-		if currentAddress == "::1" {
-			additionalAddress = "0.0.0.0"
+		if currentAddress == net.IPv6ListenerAddress {
+			additionalAddress = net.IPv4ListenerAddress
 		}
 		return []*listenerv3.AdditionalAddress{
 			{