Fix IP6Config nameserver data fetch

IP6Config.go

@@ -49,10 +49,6 @@ type IP6RouteData struct {
 	AdditionalAttributes map[string]string
 }
 
-type IP6NameserverData struct {
-	Address string
-}
-
 type IP6Config interface {
 
 	// Array of IP address data objects. All addresses will include "address" (an IP address string), and "prefix" (a uint). Some addresses may include additional attributes.
@@ -65,7 +61,7 @@ type IP6Config interface {
 	GetRouteData() []IP6RouteData
 
 	// GetNameservers gets the nameservers in use.
-	GetNameservers() []IP6NameserverData
+	GetNameservers() []string
 
 	// A list of domains this address belongs to.
 	GetDomains() []string
@@ -141,19 +137,15 @@ func (c *ip6Config) GetRouteData() []IP6RouteData {
 	return routes
 }
 
-func (c *ip6Config) GetNameservers() []IP6NameserverData {
-	nameserversData := c.getSliceMapStringVariantProperty(IP6ConfigPropertyNameservers)
-	nameservers := make([]IP6NameserverData, len(nameserversData))
+func (c *ip6Config) GetNameservers() []string {
+	nameservers := c.getSliceSliceByteProperty(IP6ConfigPropertyNameservers)
+	ret := make([]string, len(nameservers))
 
-	for _, nameserverData := range nameserversData {
-
-		nameserver := IP6NameserverData{
-			Address: nameserverData["address"].Value().(string),
-		}
-
-		nameservers = append(nameservers, nameserver)
+	for i, nameserver := range nameservers {
+		ret[i] = string(nameserver)
 	}
-	return nameservers
+
+	return ret
 }
 
 func (c *ip6Config) GetDomains() []string {

utils.go

@@ -108,6 +108,14 @@ func (d *dbusBase) getSliceStringProperty(iface string) []string {
 	return value
 }
 
+func (d *dbusBase) getSliceSliceByteProperty(iface string) [][]byte {
+	value, ok := d.getProperty(iface).([][]byte)
+	if !ok {
+		panic(makeErrVariantType(iface))
+	}
+	return value
+}
+
 func (d *dbusBase) getMapStringVariantProperty(iface string) map[string]dbus.Variant {
 	value, ok := d.getProperty(iface).(map[string]dbus.Variant)
 	if !ok {