/// <summary>
/// Pair with the hostname in the textbox
/// </summary>
public async Task Pair(Computer c)
{
Debug.WriteLine("Pairing ");
// Create NvHttp object with the user input as the URL
try
{
nv = new NvHttp(c.IpAddress);
}
catch (Exception)
{
var dialog = new MessageDialog("Invalid Hostname", "Pairing Failed");
dialog.ShowAsync();
return;
}
// Get the server IP address
try
{
await nv.ServerIPAddress();
}
catch (Exception e)
{
var dialog = new MessageDialog("Error resolving hostname " + e.Message , "Pairing Failed");
dialog.ShowAsync();
return;
}
// "Please don't do this ever, but it's only okay because Cameron said so" -Cameron Gutman
getClientCertificate();
// Get the pair state.
bool? pairState = await QueryPairState();
if (pairState == true)
{
var dialog = new MessageDialog("This device is already paired to the host PC", "Already Paired");
dialog.ShowAsync();
Debug.WriteLine("Already paired");
return;
}
// pairstate = null. We've encountered an error
else if (!pairState.HasValue)
{
var dialog = new MessageDialog("Failed to query pair state", "Pairing failed");
dialog.ShowAsync();
Debug.WriteLine("Query pair state failed");
return;
}
bool challenge = await Challenges(nv.GetUniqueId());
if (!challenge)
{
Debug.WriteLine("Challenges failed");
return;
}
// Otherwise, everything was successful
MainPage.SaveComputer(c);
var successDialog = new MessageDialog("Pairing successful", "Success");
await successDialog.ShowAsync();
}
/// <summary>
/// When the user presses "Start Streaming Steam", first check that they are paired
/// </summary>
private async Task StreamSetup(Computer computer)
{
// Resolve the hostname
try
{
nv = new NvHttp(computer.IpAddress);
}
catch (Exception)
{
StreamSetupFailed("Invalid Hostname");
return;
}
// Get the Ip address of the streaming machine
try
{
await nv.ServerIPAddress();
}
catch (Exception)
{
StreamSetupFailed("Unable to get streaming machine's IP addresss");
return;
}
Pairing p = new Pairing(nv);
// HACK: Preload the cert data
p.getClientCertificate();
// If we can't get the pair state, return
bool? pairState = await p.QueryPairState();
if (!pairState.HasValue)
{
await StreamSetupFailed("Pair state query failed");
return;
}
// If we're not paired, return
if (pairState == false)
{
await StreamSetupFailed("Device not paired");
return;
}
// If we haven't cancelled and don't have the steam ID, query app list to get it
if (computer.steamID == 0)
{
// If queryAppList fails, return
computer.steamID = await Task.Run(() => QueryAppList());
if (computer.steamID == 0)
{
await StreamSetupFailed("App list query failed");
return;
}
}
await StreamSetupComplete();
}
/// <summary>
/// Uses mDNS to enumerate the machines on the network eligible to stream from
/// </summary>
/// <returns></returns>
private async Task EnumerateEligibleMachines()
{
// TODO save previous machines you've connected to
// Make a local copy of the computer list
// The UI thread will populate the listbox with computerList whenever it pleases, so we don't want it to take the one we're modifying
List<Computer> computerListLocal = new List<Computer>(computerList);
// Ignore all computers we may have found in the past
computerListLocal.Clear();
Debug.WriteLine("Enumerating machines...");
// If there's no network, save time and don't do the time-consuming mDNS
if (!InternetAvailable)
{
Debug.WriteLine("Network not available - skipping mDNS");
}
else
{
// Let Zeroconf do its magic and find everything it can with mDNS
ILookup<string, string> domains = null;
try
{
domains = await ZeroconfResolver.BrowseDomainsAsync();
}
catch (Exception e)
{
Debug.WriteLine("Browse Domains Async threw exception: " + e.Message);
}
IReadOnlyList<IZeroconfHost> responses = null;
try
{
responses = await ZeroconfResolver.ResolveAsync(domains.Select(g => g.Key));
}
catch (Exception e)
{
Debug.WriteLine("Exception in ZeroconfResolver.ResolverAsyc (Expected if BrowseDomainsAsync excepted): " + e.Message);
}
if (responses != null)
{
// Go through every response we received and grab only the ones running nvstream
foreach (var resp in responses)
{
if (resp.Services.ContainsKey("_nvstream._tcp.local."))
{
Computer toAdd = new Computer(resp.DisplayName, resp.IPAddress);
// If we don't have the computer already, add it
if (!computerListLocal.Exists(x => x.IpAddress == resp.IPAddress))
{
computerListLocal.Add(toAdd);
Debug.WriteLine(resp);
}
}
}
}
}
// We're done messing with the list - it's okay for the UI thread to update it now
Computer last = LoadComputer();
if (last != null)
{// If we don't have the computer already, add it
if (!computerListLocal.Exists(x => x.IpAddress == last.IpAddress))
{
computerListLocal.Add(last);
}
}
computerList = computerListLocal;
if (computerList.Count == 0)
{
computerPicker.PlaceholderText = "No computers found";
}
else if (computerList.Count == 1)
{
computerPicker.PlaceholderText = "1 computer found...";
}
else
{
computerPicker.PlaceholderText = computerList.Count + " computers found...";
}
}
/// <summary>
/// Once we freshly pair to a computer, save it
/// </summary>
/// <param name="c">Computer we've paired to</param>
public static void SaveComputer(Computer c)
{
var settings = ApplicationData.Current.RoamingSettings;
settings.Values["computerName"] = c.Name;
settings.Values["computerIP"] = c.IpAddress;
}
/// <summary>
/// Executed when the user presses "Start Streaming Steam!"
/// </summary>
private async void StreamButton_Click(object sender, RoutedEventArgs e)
{
Debug.WriteLine("Start Streaming button pressed");
// Stop enumerating machines while we're trying to check pair state
mDnsTimer.Stop();
SaveSettings();
// Don't let the user mash the buttons
// TODO use a spinner to avoid the appearance of the app being unresponsive
PairButton.IsEnabled = false;
StreamButton.IsEnabled = false;
_60fps_button.IsEnabled = false;
_30fps_button.IsEnabled = false;
_720p_button.IsEnabled = false;
_1080p_button.IsEnabled = false;
status_text.Text = "Checking pair state...";
selected = (Computer)computerPicker.SelectedItem;
// User hasn't selected a machine
if (selected == null)
{
var dialog = new MessageDialog("No machine selected", "Streaming Failed");
await dialog.ShowAsync();
status_text.Text = "";
}
else
{
await StreamSetup(selected);
status_text.Text = "";
}
// User can use the buttons again
PairButton.IsEnabled = true;
StreamButton.IsEnabled = true;
_60fps_button.IsEnabled = true;
_30fps_button.IsEnabled = true;
_720p_button.IsEnabled = true;
_1080p_button.IsEnabled = true;
}
/// <summary>
/// Get the computer information passed from the previous page
/// </summary>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
// We only want to stream in landscape
DisplayInformation.AutoRotationPreferences = DisplayOrientations.Landscape;
selected = (Computer)e.Parameter;
Window.Current.CoreWindow.KeyDown += WindowKeyDownHandler;
Window.Current.CoreWindow.KeyUp += WindowKeyUpHandler;
}
/// <summary>
/// Uses mDNS to enumerate the machines on the network eligible to stream from
/// </summary>
/// <returns></returns>
private async Task EnumerateEligibleMachines()
{
// TODO save previous machines you've connected to
// Make a local copy of the computer list
// The UI thread will populate the listbox with computerList whenever it pleases, so we don't want it to take the one we're modifying
List <Computer> computerListLocal = new List <Computer>(computerList);
// Ignore all computers we may have found in the past
computerListLocal.Clear();
Debug.WriteLine("Enumerating machines...");
// If there's no network, save time and don't do the time-consuming mDNS
if (!InternetAvailable)
{
Debug.WriteLine("Network not available - skipping mDNS");
}
else
{
// Let Zeroconf do its magic and find everything it can with mDNS
ILookup <string, string> domains = null;
try
{
domains = await ZeroconfResolver.BrowseDomainsAsync();
}
catch (Exception e)
{
Debug.WriteLine("Browse Domains Async threw exception: " + e.Message);
}
IReadOnlyList <IZeroconfHost> responses = null;
try
{
responses = await ZeroconfResolver.ResolveAsync(domains.Select(g => g.Key));
}
catch (Exception e)
{
Debug.WriteLine("Exception in ZeroconfResolver.ResolverAsyc (Expected if BrowseDomainsAsync excepted): " + e.Message);
}
if (responses != null)
{
// Go through every response we received and grab only the ones running nvstream
foreach (var resp in responses)
{
if (resp.Services.ContainsKey("_nvstream._tcp.local."))
{
Computer toAdd = new Computer(resp.DisplayName, resp.IPAddress, steamId);
// If we don't have the computer already, add it
if (!computerListLocal.Exists(x => x.IpAddress == resp.IPAddress))
{
computerListLocal.Add(toAdd);
Debug.WriteLine(resp);
}
}
}
}
}
// We're done messing with the list - it's okay for the UI thread to update it now
computerList = computerListLocal;
if (computerList.Count == 0)
{
computerPicker.PlaceholderText = "No computers found";
}
else if (computerList.Count == 1)
{
computerPicker.PlaceholderText = "1 computer found...";
}
else
{
computerPicker.PlaceholderText = computerList.Count + " computers found...";
}
}
