/// <summary>
/// Populates the NetworkAdapter list
/// </summary>
private void PopulateAdapterList()
{
localHostItems.Clear();
AdapterList.ItemsSource = localHostItems;
AdapterList.DisplayMemberPath = "DisplayString";
foreach (HostName localHostInfo in NetworkInformation.GetHostNames())
{
if (localHostInfo.IPInformation != null)
{
LocalHostItem adapterItem = new LocalHostItem(localHostInfo);
localHostItems.Add(adapterItem);
}
}
}
/// <summary>
/// This is the click handler for the 'StartListener' button.
/// </summary>
/// <param name="sender">Object for which the event was generated.</param>
/// <param name="e">Event's parameters.</param>
private async void StartListener_Click(object sender, RoutedEventArgs e)
{
if (String.IsNullOrEmpty(ServiceNameForListener.Text))
{
rootPage.NotifyUser("Please provide a service name.", NotifyType.ErrorMessage);
return;
}
if (CoreApplication.Properties.ContainsKey("listener"))
{
rootPage.NotifyUser(
"This step has already been executed. Please move to the next one.",
NotifyType.ErrorMessage);
return;
}
CoreApplication.Properties.Remove("serverAddress");
DatagramSocket listener = new DatagramSocket();
listener.MessageReceived += MessageReceived;
if (!String.IsNullOrWhiteSpace(InboundBufferSize.Text))
{
uint inboundBufferSize = 0;
if (!uint.TryParse(InboundBufferSize.Text, out inboundBufferSize))
{
rootPage.NotifyUser(
"Please provide a positive numeric Inbound buffer size.",
NotifyType.ErrorMessage);
return;
}
try
{
// Running both client and server on localhost will most likely not reach the buffer limit.
listener.Control.InboundBufferSizeInBytes = inboundBufferSize;
}
catch (ArgumentException)
{
rootPage.NotifyUser("Please provide a valid Inbound buffer size.", NotifyType.ErrorMessage);
return;
}
}
LocalHostItem selectedLocalHost = null;
if ((BindToAddress.IsChecked == true) || (BindToAdapter.IsChecked == true))
{
selectedLocalHost = (LocalHostItem)AdapterList.SelectedItem;
if (selectedLocalHost == null)
{
rootPage.NotifyUser("Please select an address / adapter.", NotifyType.ErrorMessage);
return;
}
// The user selected an address. For demo purposes, we ensure that connect will be using the same
// address.
CoreApplication.Properties.Add("serverAddress", selectedLocalHost.LocalHost.CanonicalName);
}
// Save the socket, so subsequent steps can use it.
CoreApplication.Properties.Add("listener", listener);
// Start listen operation.
try
{
if (BindToAny.IsChecked == true)
{
// Don't limit traffic to an address or an adapter.
await listener.BindServiceNameAsync(ServiceNameForListener.Text);
rootPage.NotifyUser("Listening", NotifyType.StatusMessage);
}
else if (BindToAddress.IsChecked == true)
{
// Try to bind to a specific address.
await listener.BindEndpointAsync(selectedLocalHost.LocalHost, ServiceNameForListener.Text);
rootPage.NotifyUser(
"Listening on address " + selectedLocalHost.LocalHost.CanonicalName,
NotifyType.StatusMessage);
}
else if (BindToAdapter.IsChecked == true)
{
// Try to limit traffic to the selected adapter.
// This option will be overriden by interfaces with weak-host or forwarding modes enabled.
NetworkAdapter selectedAdapter = selectedLocalHost.LocalHost.IPInformation.NetworkAdapter;
await listener.BindServiceNameAsync(ServiceNameForListener.Text, selectedAdapter);
rootPage.NotifyUser(
"Listening on adapter " + selectedAdapter.NetworkAdapterId,
NotifyType.StatusMessage);
}
}
catch (Exception exception)
{
CoreApplication.Properties.Remove("listener");
// If this is an unknown status it means that the error is fatal and retry will likely fail.
if (SocketError.GetStatus(exception.HResult) == SocketErrorStatus.Unknown)
{
throw;
}
rootPage.NotifyUser(
"Start listening failed with error: " + exception.Message,
NotifyType.ErrorMessage);
}
}
/// <summary>
/// Populates the NetworkAdapter list
/// </summary>
private void PopulateAdapterList()
{
localHostItems.Clear();
AdapterList.ItemsSource = localHostItems;
AdapterList.DisplayMemberPath = "DisplayString";
foreach (HostName localHostInfo in NetworkInformation.GetHostNames())
{
if (localHostInfo.IPInformation != null)
{
LocalHostItem adapterItem = new LocalHostItem(localHostInfo);
localHostItems.Add(adapterItem);
}
}
}
