Issue #8 Use win32 API to set nameservers

pkg/crc/services/dns/dns_windows.go

@@ -10,18 +10,17 @@ import (
 	"github.com/code-ready/crc/pkg/crc/services"
 
 	"github.com/code-ready/crc/pkg/os/windows/powershell"
+	"github.com/code-ready/crc/pkg/os/windows/win32"
 )
 
 func runPostStartForOS(serviceConfig services.ServicePostStartConfig, result *services.ServicePostStartResult) (services.ServicePostStartResult, error) {
-	mainInterface := getMainInterface()
-	serverAddresses := getInterfaceNameserverValues(mainInterface)
-	serverAddresses = append([]string{serviceConfig.IP}, serverAddresses...)
+	networkInterface := "vEthernet (Default Switch)" //getMainInterface()
 
-	setInterfaceNameserverValues(mainInterface, serverAddresses)
+	setInterfaceNameserverValues(networkInterface, serviceConfig.IP)
 
 	time.Sleep(2 * time.Second)
 
-	if !contains(getInterfaceNameserverValues(mainInterface), serviceConfig.IP) {
+	if !contains(getInterfaceNameserverValues(networkInterface), serviceConfig.IP) {
 		err := errors.New("Nameserver not successfully set")
 		result.Success = false
 		result.Error = err.Error()
@@ -60,11 +59,15 @@ func formatValues(serverAddresses []string) string {
 	return out
 }
 
-func setInterfaceNameserverValues(iface string, serverAddresses []string) {
-	setDNSServerCommand := fmt.Sprintf(`Set-DNSClientServerAddress "%s" -ServerAddresses (%s)`,
-		iface, formatValues(serverAddresses))
+func setInterfaceNameserverValues(iface string, address string) {
 
-	powershell.ExecuteAsAdmin(setDNSServerCommand)
+	verb := "runas" // open
+	file := "netsh"
+	args := fmt.Sprintf(`interface ip set dns "%s" static %s primary`, iface, address)
+	cwd := ""
+	showCmd := 1
+
+	win32.ShellExecute(win32.HWND_DESKTOP, verb, file, args, cwd, showCmd)
 }
 
 func getMainInterface() string {