private async void Init()
{
_Listener = new DatagramSocket();
_Listener.MessageReceived += Listener_MessageReceived;
while (true)
{
try
{
await _Listener.BindServiceNameAsync("6");
break;
}
catch (COMException)
{
var messageDialog = new MessageDialog("Only one usage of each port is normally permitted.\r\n\r\nIs 'Windows IoT Core Watcher' open?", "Port in use");
messageDialog.Commands.Add(new UICommand("Try again", (command) => { }));
await messageDialog.ShowAsync();
}
}
HostName hostname = new HostName("239.0.0.222");
_Listener.JoinMulticastGroup(hostname);
_Settings = ApplicationData.Current.LocalSettings;
_Timer = new Timer(Timer_Callback, null, 1000, 1000);
}
public static async void init(TiSettings settings) {
if (!settings.ContainsKey("logToken") || settings["logToken"].Length == 0) {
return;
}
logToken = settings["logToken"];
multicastSocket = new DatagramSocket();
multicastSocket.MessageReceived += multicastSocket_MessageReceived;
HostName hostname = new HostName("239.6.6.6");
try {
await multicastSocket.BindServiceNameAsync("8666");
multicastSocket.JoinMulticastGroup(hostname);
IOutputStream stream = await multicastSocket.GetOutputStreamAsync(hostname, "8666");
DataWriter writer = new DataWriter(stream);
writer.WriteString("TI_WP8_LOGGER");
await writer.StoreAsync();
writer.DetachStream();
stream.Dispose();
} catch (Exception ex) {
if (SocketError.GetStatus(ex.HResult) == SocketErrorStatus.Unknown) {
throw;
}
Debug.WriteLine(ex.ToString());
}
}
public async Task Open()
{
//CheckBackgroundTask();
//await CheckSocketAsync();
#region Simple socket creation
if (listenerSocket == null)
{
listenerSocket = new DatagramSocket();
listenerSocket.Control.DontFragment = true;
listenerSocket.Control.MulticastOnly = true;
listenerSocket.MessageReceived += DataReceived;
try
{
await listenerSocket.BindServiceNameAsync(localService);
listenerSocket.JoinMulticastGroup(new HostName(remoteMulticastAddress));
}
catch (Exception exception)
{
Close();
// 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);
}
}
#endregion
}
/// <summary>
/// Initialize the connection to the network (prepare sockets, join multicast group, handle the right events, etc)
/// </summary>
/// <returns></returns>
public void InitializeSockets()
{
if (Initialized)
return;
MulticastAddress = new HostName(MulticastAddressStr);
// To receive packets (either unicast or multicast), a MessageReceived event handler must be defined
// Initialize the multicast socket and register the event
MulticastSocket = new DatagramSocket();
MulticastSocket.MessageReceived += MulticastSocketMessageReceived;
// bind to a local UDP port
MulticastSocket.BindServiceNameAsync(MulticastPortStr).AsTask().Wait();
// Call the JoinMulticastGroup method to join the multicast group.
MulticastSocket.JoinMulticastGroup(MulticastAddress);
// Get our IP address
String MyIPString = PeerConnector.GetMyIP();
myIPAddress = new HostName(MyIPString);
// Construct a list of ip addresses that should be ignored
IgnoreableNetworkAddresses = new List<String> { LinkLocalPrefixString, LocalLoopbackPrefixString, PrivateNetworkPrefixString }; //, MyIPString };
System.Diagnostics.Debug.WriteLine("Ignored IP Addresses: " + LinkLocalPrefixString + " - " + LocalLoopbackPrefixString + " - " + PrivateNetworkPrefixString);
TCPListener = new TCPSocketListener("80085", new TCPRequestHandler(ProcessNetworkObject));
TCPSocketHelper = new TCPSocketClient("80085");
TCPListener.Start();
Initialized = true;
}
private async Task ExecuteDiscoveryTask()
{
int repeatTime = EndpointController.REPEAT_DISCOVERY_TASK / 2;
while (running)
{
Debug.WriteLine("#> [DiscoveryCloudletMulticast]: Started Cloudlet Discovery using Multicast UDP");
retry = 0;
DatagramSocket socketSent = null;
DatagramSocket socketReplay = null;
try
{
socketSent = new DatagramSocket();
await socketSent.BindEndpointAsync(null, string.Empty);
socketSent.JoinMulticastGroup(ip);
socketReplay = new DatagramSocket();
socketReplay.MessageReceived += SocketOnMessageReceived;
await socketReplay.BindServiceNameAsync(replyCloudletPort.ToString());
using (DataWriter writer = new DataWriter(await socketSent.GetOutputStreamAsync(ip, multicastPort.ToString())))
{
while (retry < 60 && running)
{
writer.WriteString("mpos_cloudlet_req");
await writer.StoreAsync();
await writer.FlushAsync();
await Task.Delay(500);
retry++;
}
}
}
catch (IOException e)
{
Debug.WriteLine("## [DiscoveryCloudletMulticast]: Any problem with i/o in multicast system!\n" + e.ToString());
}
finally
{
socketSent.Dispose();
socketReplay.Dispose();
socketSent = null;
socketReplay = null;
}
if (running)
{
Debug.WriteLine(">> [DiscoveryCloudletMulticast]: Retry Discovery Cloudlet, in " + repeatTime + " ms");
await Task.Delay(repeatTime);
}
else
{
Debug.WriteLine("#> [DiscoveryCloudletMulticast]: Finished Discovery Cloudlet");
}
}
}
/// <summary>
/// Returns list of bridge IPs
/// </summary>
/// <returns></returns>
public async Task<IEnumerable<string>> LocateBridgesAsync(TimeSpan timeout)
{
if (timeout <= TimeSpan.Zero)
throw new ArgumentException("Timeout value must be greater than zero.", "timeout");
var discoveredDevices = new List<string>();
var multicastIP = new HostName("239.255.255.250");
using (var socket = new DatagramSocket())
{
//Handle MessageReceived
socket.MessageReceived += (sender, e) =>
{
var reader = e.GetDataReader();
var bytesRemaining = reader.UnconsumedBufferLength;
var receivedString = reader.ReadString(bytesRemaining);
var location = receivedString.Substring(receivedString.ToLower().IndexOf("location:", System.StringComparison.Ordinal) + 9);
receivedString = location.Substring(0, location.IndexOf("\r", System.StringComparison.Ordinal)).Trim();
discoveredDevices.Add(receivedString);
};
await socket.BindEndpointAsync(null, string.Empty);
socket.JoinMulticastGroup(multicastIP);
var start = DateTime.Now;
do
{
using (var stream = await socket.GetOutputStreamAsync(multicastIP, "1900"))
using (var writer = new DataWriter(stream))
{
string request = "M-SEARCH * HTTP/1.1\r\n" +
"HOST:239.255.255.250:1900\r\n" +
//"ST:urn:schemas-upnp-org:device:Basic:1\r\n" + //Alternative
// "ST:upnp:rootdevice\r\n" + //Alternative
"ST:SsdpSearch:all\r\n" +
"MAN:\"ssdp:discover\"\r\n" +
"MX:3\r\n\r\n\r\n";
writer.WriteString(request.ToString());
await writer.StoreAsync();
}
}
while (DateTime.Now.Subtract(start) < timeout); // try for thee seconds
}
return await FilterBridges(discoveredDevices);
}
private async Task<DatagramSocket> ListenForTick(NetworkAdapter hostname)
{
var socket = new DatagramSocket();
socket.MessageReceived += OnMessageReceived;
await socket.BindServiceNameAsync(Settings.RemoteServiceName, hostname);
socket.JoinMulticastGroup(new HostName(Settings.MulticastAddress));
Log($"Listening on {hostname.NetworkAdapterId}:{Settings.RemoteServiceName}");
return socket;
}
private async Task SendTick()
{
using (var socket = new DatagramSocket())
{
await socket.BindServiceNameAsync(string.Empty);
socket.JoinMulticastGroup(new HostName(BroadcastAddress));
var outputStream =
await socket.GetOutputStreamAsync(new HostName(BroadcastAddress), RemoteServiceName);
var buffer = Encoding.UTF8.GetBytes("TT_SEND_DEVICE_INFO");
await outputStream.WriteAsync(buffer.AsBuffer());
await outputStream.FlushAsync();
Debug.WriteLine("TICK Broadcasted to {0}:{1}", BroadcastAddress, RemoteServiceName);
}
}
/// <summary>
/// Start listening.
/// </summary>
public override async Task<bool> StartListeningAsync()
{
bool status = false;
if (_listenerSocket == null)
{
_listenerSocket = new DatagramSocket();
_listenerSocket.MessageReceived += AdvertisementMessageReceivedFromManagerAsync;
await _listenerSocket.BindServiceNameAsync(ListenerPort);
_listenerSocket.JoinMulticastGroup(ListenerGroupHost);
status = true;
}
return status;
}
public override async void Start()
{
if (Status == ListenerStatus.Listening)
return;
try
{
_datagramSocket = new DatagramSocket();
_datagramSocket.MessageReceived += DatagramSocketOnMessageReceived;
await _datagramSocket.BindServiceNameAsync(MulticastPort.ToString());
_datagramSocket.JoinMulticastGroup(MulticastIpAddress);
RaiseStatusChanged(ListenerStatus.Listening);
}
catch
{
RaiseStatusChanged(ListenerStatus.PortNotFree);
}
}
/// <summary>
/// @see http://www.johnthom.com/implementing-ssdp-search-in-windows-phone-8-using-winrt/
/// </summary>
public async Task DiscoverDevices()
{
int timeout = 3000;
var remoteIp = "239.255.255.250";
var remoteIpHostName = new Windows.Networking.HostName(remoteIp);
var port = "1900";
string query = "M-SEARCH * HTTP/1.1\r\n" +
"HOST: 239.255.255.250:1900\r\n" +
"ST: upnp:rootdevice\r\n" +
"MAN: \"ssdp:discover\"\r\n" +
"MX: " + timeout.ToString() + "\r\n\r\n";
var buffer = Encoding.UTF8.GetBytes(query);
using (var socket = new DatagramSocket())
{
socket.MessageReceived += (sender, args) => {
Task.Run(() => {
using (var reader = args.GetDataReader())
{
byte[] respBuff = new byte[reader.UnconsumedBufferLength];
reader.ReadBytes(respBuff);
string response = Encoding.UTF8.GetString(respBuff, 0, respBuff.Length).ToLower();
response.Trim('\0');
ProcessSSDPResponse(response);
}
});
};
await socket.BindEndpointAsync(null, "");
socket.JoinMulticastGroup(remoteIpHostName);
using (var stream = await socket.GetOutputStreamAsync(remoteIpHostName, port))
{
await stream.WriteAsync(buffer.AsBuffer());
}
// Execute within timeout
await Task.Delay(timeout);
}
}
public async void FindTvs()
{
if (searchState == SearchState.Searching)
{
StopSearching();
}
tvSearchSocket = new DatagramSocket();
tvSearchSocket.MessageReceived += TvListenCompleted;
await tvSearchSocket.BindEndpointAsync(null, "");
tvSearchSocket.JoinMulticastGroup(multicastAddress);
StartedSearching();
SendSSDP();
tvSearchRetryTimer = new Timer(TvSearchRetry, null, TimeSpan.FromSeconds(tvSearchRetryTimeSeconds), TimeSpan.FromMilliseconds(-1));
tvSearchTimeoutTimer = new Timer(TvSearchTimeout, null, TimeSpan.FromSeconds(tvSearchTotalTimeSeconds), TimeSpan.FromMilliseconds(-1));
searchState = SearchState.Searching;
}
public static IObservable<ZeroconfRecord> Resolve(string protocol)
{
return Observable.Create<ZeroconfRecord>(async observer =>
{
var socket = new DatagramSocket();
var s = Observable
.FromEventPattern
<TypedEventHandler<DatagramSocket, DatagramSocketMessageReceivedEventArgs>,
DatagramSocketMessageReceivedEventArgs>(
x => socket.MessageReceived += x, _ => socket.Dispose())
.Select(ProcessMessage)
.Where(x => x != null)
.Subscribe(observer);
await socket.BindServiceNameAsync("5353");
socket.JoinMulticastGroup(new HostName("224.0.0.251"));
var os = await socket.GetOutputStreamAsync(new HostName("224.0.0.251"), "5353");
var writer = new DataWriter(os);
WriteQueryMessage(protocol, writer);
writer.StoreAsync();
return s;
});
}
public async Task<bool> StartupAsync(string multicastIP, int multicastPort)
{
await ShutdownAsync();
IsRunning = true;
this.MulticastIP = multicastIP;
this.MulticastPort = multicastPort;
try
{
socket = new DatagramSocket();
socket.MessageReceived += socket_MessageReceived;
await socket.BindEndpointAsync(null, multicastPort.ToString());
socket.JoinMulticastGroup(new HostName(multicastIP));
return true;
}
catch (Exception ex)
{
Debug.WriteLine(string.Format("{0} occurred while starting multicast listener: {1}", ex.GetType().Name, ex.Message));
await ShutdownAsync();
return false;
}
}
private async Task CheckSocketAsync()
{
try
{
SocketActivityInformation socketInformation;
if (!SocketActivityInformation.AllSockets.TryGetValue(socketId, out socketInformation))
{
var socket = new DatagramSocket();
socket.Control.DontFragment = true;
socket.Control.MulticastOnly = true;
socket.EnableTransferOwnership(task.TaskId, SocketActivityConnectedStandbyAction.Wake);
await socket.BindServiceNameAsync(localService);
socket.JoinMulticastGroup(new HostName(remoteMulticastAddress));
// To demonstrate usage of CancelIOAsync async, have a pending read on the socket and call
// cancel before transfering the socket.
//DataReader reader = new DataReader(socket.InputStream);
//reader.InputStreamOptions = InputStreamOptions.Partial;
//var read = reader.LoadAsync(250);
//read.Completed += (info, status) =>
//{
//};
//await socket.CancelIOAsync();
socket.TransferOwnership(socketId);
socket = null;
}
//rootPage.NotifyUser("Connected. You may close the application", NotifyType.StatusMessage);
}
catch (Exception exception)
{
//rootPage.NotifyUser(exception.Message, NotifyType.ErrorMessage);
}
}
/// <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(ServiceName.Text))
{
rootPage.NotifyUser("Please provide a service name.", NotifyType.ErrorMessage);
return;
}
if (listenerSocket != null)
{
rootPage.NotifyUser("A listener socket is already set up.", NotifyType.ErrorMessage);
return;
}
bool isMulticastSocket = (MulticastRadioButton.IsChecked == true);
listenerSocket = new DatagramSocket();
listenerSocket.MessageReceived += MessageReceived;
if (isMulticastSocket)
{
// DatagramSockets conduct exclusive (SO_EXCLUSIVEADDRUSE) binds by default, effectively blocking
// any other UDP socket on the system from binding to the same local port. This is done to prevent
// other applications from eavesdropping or hijacking a DatagramSocket's unicast traffic.
//
// Setting the MulticastOnly control option to 'true' enables a DatagramSocket instance to share its
// local port with any Win32 sockets that are bound using SO_REUSEADDR/SO_REUSE_MULTICASTPORT and
// with any other DatagramSocket instances that have MulticastOnly set to true. However, note that any
// attempt to use a multicast-only DatagramSocket instance to send or receive unicast data will result
// in an exception being thrown.
//
// This control option is particularly useful when implementing a well-known multicast-based protocol,
// such as mDNS and UPnP, since it enables a DatagramSocket instance to coexist with other applications
// running on the system that also implement that protocol.
listenerSocket.Control.MulticastOnly = true;
}
// Start listen operation.
try
{
await listenerSocket.BindServiceNameAsync(ServiceName.Text);
if (isMulticastSocket)
{
// Join the multicast group to start receiving datagrams being sent to that group.
listenerSocket.JoinMulticastGroup(new HostName(RemoteAddress.Text));
rootPage.NotifyUser(
"Listening on port " + listenerSocket.Information.LocalPort + " and joined to multicast group",
NotifyType.StatusMessage);
}
else
{
rootPage.NotifyUser(
"Listening on port " + listenerSocket.Information.LocalPort,
NotifyType.StatusMessage);
}
// Enable scenario steps that require us to have an active listening socket.
SendMessageButton.IsEnabled = true;
CloseListenerButton.IsEnabled = true;
}
catch (Exception exception)
{
listenerSocket.Dispose();
listenerSocket = null;
// 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);
}
}
private static async Task BindToSocketAndWriteQuery(DatagramSocket socket, byte[] bytes, CancellationToken cancellationToken)
{
await socket.BindServiceNameAsync("5353")
.AsTask(cancellationToken)
.ConfigureAwait(false);
socket.JoinMulticastGroup(new HostName("224.0.0.251"));
var os = await socket.GetOutputStreamAsync(new HostName("224.0.0.251"), "5353")
.AsTask(cancellationToken)
.ConfigureAwait(false);
using (var writer = new DataWriter(os))
{
writer.WriteBytes(bytes);
await writer.StoreAsync()
.AsTask(cancellationToken)
.ConfigureAwait(false);
Debug.WriteLine("Sent mDNS query");
writer.DetachStream();
}
}
private static async Task BindToSocketAndWriteQuery(DatagramSocket socket, byte[] bytes, CancellationToken cancellationToken)
{
#if !WINDOWS_PHONE
try
{
// Try to bind using port 5353 first
await socket.BindServiceNameAsync("5353", NetworkInformation.GetInternetConnectionProfile().NetworkAdapter)
.AsTask(cancellationToken)
.ConfigureAwait(false);
}
catch (Exception)
{
// If it fails, use the default
await socket.BindServiceNameAsync("", NetworkInformation.GetInternetConnectionProfile().NetworkAdapter)
.AsTask(cancellationToken)
.ConfigureAwait(false);
}
#else
await socket.BindServiceNameAsync("5353")
.AsTask(cancellationToken)
.ConfigureAwait(false);
#endif
socket.JoinMulticastGroup(new HostName("224.0.0.251"));
var os = await socket.GetOutputStreamAsync(new HostName("224.0.0.251"), "5353")
.AsTask(cancellationToken)
.ConfigureAwait(false);
using (var writer = new DataWriter(os))
{
writer.WriteBytes(bytes);
await writer.StoreAsync()
.AsTask(cancellationToken)
.ConfigureAwait(false);
Debug.WriteLine("Sent mDNS query");
writer.DetachStream();
}
}
/// <summary>
/// Search devices and retrieve their device info.
/// </summary>
/// <param name="timeoutSec">Seconds to wait before invokation of OnTimeout.</param>
/// <param name="OnServerFound">Success callback. This will be invoked for each devices until OnTimeout is invoked.</param>
/// <param name="OnTimeout">Timeout callback.</param>
public async void SearchDevices(int timeoutSec, Action<DeviceInfo> OnServerFound, Action OnTimeout)
{
if (OnServerFound == null || OnTimeout == null)
{
throw new ArgumentNullException();
}
Debug.WriteLine("DeviceFinder.SearchDevices");
if (timeoutSec < 2)
{
timeoutSec = 2;
}
const int MX = 1;
var ssdp_data = new StringBuilder()
.Append("M-SEARCH * HTTP/1.1").Append("\r\n")
.Append("HOST: ").Append(multicast_address).Append(":").Append(ssdp_port.ToString()).Append("\r\n")
.Append("MAN: ").Append("\"ssdp:discover\"").Append("\r\n")
.Append("MX: ").Append(MX.ToString()).Append("\r\n")
.Append("ST: urn:schemas-sony-com:service:ScalarWebAPI:1").Append("\r\n")
//.Append("ST: ssdp:all").Append("\r\n") // For debug
.Append("\r\n")
.ToString();
byte[] data_byte = Encoding.UTF8.GetBytes(ssdp_data);
//Debug.WriteLine(ssdp_data);
bool timeout_called = false;
var DD_Handler = new AsyncCallback(ar =>
{
if (timeout_called)
{
return;
}
var req = ar.AsyncState as HttpWebRequest;
try
{
var res = req.EndGetResponse(ar) as HttpWebResponse;
using (var reader = new StreamReader(res.GetResponseStream(), Encoding.UTF8))
{
try
{
var info = AnalyzeDD(reader.ReadToEnd());
NotifyFoundAsync(info, OnServerFound);
}
catch (Exception)
{
//Invalid XML.
}
}
}
catch (WebException)
{
//Invalid DD location or network error.
}
});
#if WINDOWS_PHONE
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.SendBufferSize = data_byte.Length;
SocketAsyncEventArgs snd_event_args = new SocketAsyncEventArgs();
snd_event_args.RemoteEndPoint = new IPEndPoint(IPAddress.Parse(multicast_address), ssdp_port);
snd_event_args.SetBuffer(data_byte, 0, data_byte.Length);
SocketAsyncEventArgs rcv_event_args = new SocketAsyncEventArgs();
rcv_event_args.SetBuffer(new byte[result_buffer], 0, result_buffer);
var SND_Handler = new EventHandler<SocketAsyncEventArgs>((sender, e) =>
{
if (e.SocketError == SocketError.Success && e.LastOperation == SocketAsyncOperation.SendTo)
{
socket.ReceiveBufferSize = result_buffer;
socket.ReceiveAsync(rcv_event_args);
}
});
snd_event_args.Completed += SND_Handler;
var RCV_Handler = new EventHandler<SocketAsyncEventArgs>((sender, e) =>
{
if (e.SocketError == SocketError.Success && e.LastOperation == SocketAsyncOperation.Receive)
{
string result = Encoding.UTF8.GetString(e.Buffer, 0, e.BytesTransferred);
//Debug.WriteLine(result);
GetDDAsync(DD_Handler, result);
socket.ReceiveAsync(e);
}
});
rcv_event_args.Completed += RCV_Handler;
socket.SendToAsync(snd_event_args);
#elif NETFX_CORE
var sock = new DatagramSocket();
sock.MessageReceived += (sender, args) =>
{
if (timeout_called || args == null)
{
return;
}
var reader = args.GetDataReader();
string data = reader.ReadString(reader.UnconsumedBufferLength);
Debug.WriteLine(data);
GetDDAsync(DD_Handler, data);
};
try
{
await sock.BindServiceNameAsync(ssdp_port.ToString());
}
catch (Exception)
{
Debug.WriteLine("Duplicate search is not supported");
return;
}
var host = new HostName(multicast_address);
sock.JoinMulticastGroup(host);
try
{
var output = await sock.GetOutputStreamAsync(host, ssdp_port.ToString());
await output.WriteAsync(data_byte.AsBuffer());
await sock.OutputStream.FlushAsync();
}
catch (Exception)
{
Debug.WriteLine("Failed to send multicast");
return;
}
#endif
await RunTimeoutInvokerAsync(timeoutSec, () =>
{
Debug.WriteLine("SSDP Timeout");
timeout_called = true;
#if WINDOWS_PHONE
snd_event_args.Completed -= SND_Handler;
rcv_event_args.Completed -= RCV_Handler;
socket.Close();
#elif NETFX_CORE
sock.Dispose();
#endif
OnTimeout.Invoke();
});
}
/// <summary>
/// Searches for an available devices of specified type.
/// </summary>
/// <param name="searchTarget">
/// The type of the devices to search for.
/// </param>
/// <param name="timeForResponse">
/// The time (in seconds) of a search.
/// </param>
/// <returns>
/// An observable collection which contains search results.
/// </returns>
public IObservable<SearchResponseMessage> Search(string searchTarget, int timeForResponse)
{
return Observable.Create<SearchResponseMessage>(async observer =>
{
var searchSocket = new DatagramSocket();
// Handling responses from found devices
searchSocket.MessageReceived += async (sender, args) =>
{
var dataReader = args.GetDataReader();
dataReader.InputStreamOptions = InputStreamOptions.Partial;
if (dataReader.UnconsumedBufferLength == 0)
{
await dataReader.LoadAsync(1024);
}
var message = dataReader.ReadString(dataReader.UnconsumedBufferLength);
try
{
var response = SearchResponseMessage.Create(message);
observer.OnNext(response);
}
catch (ArgumentException ex)
{
logger.Instance().Warning(ex, "The received M-Search response has been ignored.", "Message".As(message));
}
};
await searchSocket.BindServiceNameAsync("0");
searchSocket.JoinMulticastGroup(this.multicastHost);
var request = MSearchRequestFormattedString.F(searchTarget, timeForResponse);
var buffer = Encoding.UTF8.GetBytes(request).AsBuffer();
// Sending the search request to a multicast group
var outputStream = await searchSocket.GetOutputStreamAsync(this.multicastHost, MulticastPort.ToString());
await outputStream.WriteAsync(buffer);
await outputStream.WriteAsync(buffer);
// Stop listening for a devices when timeout for responses is expired
Observable.Timer(TimeSpan.FromSeconds(timeForResponse)).Subscribe(s =>
{
observer.OnCompleted();
searchSocket.Dispose();
});
logger.Instance().Debug("M-Search request has been sent. [multicastHost={0}, searchTarget={1}]".F(multicastHost.DisplayName, searchTarget));
return searchSocket.Dispose;
});
}
/// <summary>
/// initialize multicast
/// </summary>
private async void multi_cast()
{
listenerSocket = new DatagramSocket(); //datagram object
listenerSocket.MessageReceived += MessageReceived; //MessageReceived event
//listenerSocket.MessageReceived += MessageReceived;
listenerSocket.Control.MulticastOnly = true;
//datagram service name
await listenerSocket.BindServiceNameAsync("22113");
//Datagram group IP
listenerSocket.JoinMulticastGroup(new HostName("224.3.0.5"));
}
private async void Search(string st, TimeSpan? timeout = null)
{
Log("Search");
var ssdp_data = new StringBuilder()
.Append("M-SEARCH * HTTP/1.1").Append("\r\n")
.Append("HOST: ").Append(MULTICAST_ADDRESS).Append(":").Append(SSDP_PORT.ToString()).Append("\r\n")
.Append("MAN: ").Append("\"ssdp:discover\"").Append("\r\n")
.Append("MX: ").Append(MX.ToString()).Append("\r\n")
.Append("ST: ").Append(st).Append("\r\n")
.Append("\r\n")
.ToString();
var data_byte = Encoding.UTF8.GetBytes(ssdp_data);
var timeout_called = false;
#if WINDOWS_PHONE||DOT_NET
var DD_Handler = new AsyncCallback(ar =>
{
if (timeout_called)
{
return;
}
var req = ar.AsyncState as HttpWebRequest;
try
{
var res = req.EndGetResponse(ar) as HttpWebResponse;
using (var reader = new StreamReader(res.GetResponseStream(), Encoding.UTF8))
{
try
{
var response = reader.ReadToEnd();
OnDiscovered(new DeviceDescriptionEventArgs(response));
var camera = AnalyzeDescription(response);
if (camera != null)
{
OnDiscovered(new SonyCameraDeviceEventArgs(camera, req.RequestUri));
}
}
catch (Exception)
{
Log("Invalid XML");
//Invalid XML.
}
}
}
catch (WebException)
{
//Invalid DD location or network error.
}
});
var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.SendBufferSize = data_byte.Length;
var snd_event_args = new SocketAsyncEventArgs();
snd_event_args.RemoteEndPoint = new IPEndPoint(IPAddress.Parse(MULTICAST_ADDRESS), SSDP_PORT);
snd_event_args.SetBuffer(data_byte, 0, data_byte.Length);
var rcv_event_args = new SocketAsyncEventArgs();
rcv_event_args.SetBuffer(new byte[RESULT_BUFFER], 0, RESULT_BUFFER);
var SND_Handler = new EventHandler<SocketAsyncEventArgs>((sender, e) =>
{
if (e.SocketError == SocketError.Success && e.LastOperation == SocketAsyncOperation.SendTo)
{
try
{
socket.ReceiveBufferSize = RESULT_BUFFER;
socket.ReceiveAsync(rcv_event_args);
}
catch (ObjectDisposedException)
{
Log("Socket is already disposed.");
}
}
});
snd_event_args.Completed += SND_Handler;
var RCV_Handler = new EventHandler<SocketAsyncEventArgs>((sender, e) =>
{
if (e.SocketError == SocketError.Success && e.LastOperation == SocketAsyncOperation.Receive)
{
string result = Encoding.UTF8.GetString(e.Buffer, 0, e.BytesTransferred);
//Log(result);
GetDeviceDescriptionAsync(DD_Handler, result);
try
{
socket.ReceiveAsync(e);
}
catch (ObjectDisposedException)
{
Log("Socket is already disposed.");
}
}
});
rcv_event_args.Completed += RCV_Handler;
socket.SendToAsync(snd_event_args);
#elif WINDOWS_PHONE_APP||WINDOWS_APP||NETFX_CORE
var handler = new TypedEventHandler<DatagramSocket, DatagramSocketMessageReceivedEventArgs>(async (sender, args) =>
{
Log("Datagram message received");
if (timeout_called || args == null)
{
return;
}
string data;
using (var reader = args.GetDataReader())
{
data = reader.ReadString(reader.UnconsumedBufferLength);
}
Log(data);
await GetDeviceDescriptionAsync(data, args.LocalAddress).ConfigureAwait(false);
});
var adapters = await GetActiveAdaptersAsync().ConfigureAwait(false);
await Task.WhenAll(adapters.Select(async adapter =>
{
using (var socket = new DatagramSocket())
{
socket.Control.DontFragment = true;
socket.MessageReceived += handler;
try
{
await socket.BindServiceNameAsync("", adapter);
socket.JoinMulticastGroup(MULTICAST_HOST);
using (var output = await socket.GetOutputStreamAsync(MULTICAST_HOST, SSDP_PORT.ToString()))
{
using (var writer = new DataWriter(output))
{
writer.WriteBytes(data_byte);
await writer.StoreAsync();
}
}
await Task.Delay((timeout == null) ? DEFAULT_TIMEOUT : timeout.Value).ConfigureAwait(false);
Log("Search Timeout");
timeout_called = true;
}
catch (Exception e)
{
Log("Failed to send multicast: " + e.StackTrace);
}
finally
{
socket.MessageReceived -= handler;
}
}
})).ConfigureAwait(false);
#endif
#if WINDOWS_PHONE||DOT_NET
await Task.Delay((timeout == null) ? DEFAULT_TIMEOUT : timeout.Value).ConfigureAwait(false);
Log("Search Timeout");
timeout_called = true;
snd_event_args.Completed -= SND_Handler;
rcv_event_args.Completed -= RCV_Handler;
socket.Close();
#endif
OnTimeout(new EventArgs());
}
public async Task DiscoverBridge(TimeSpan timeOut)
{
var multicastIP = new HostName("239.255.255.250");
var foundBridge = false;
using (var socket = new DatagramSocket())
{
socket.MessageReceived += async (sender, args) =>
{
var reader = args.GetDataReader();
var bytesRemaining = reader.UnconsumedBufferLength;
foreach (var line in reader.ReadString(bytesRemaining).Split(new String[1] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries))
{
if (line.StartsWith("LOCATION"))
{
var address = line.Split(new char[1] { ':' }, 2)[1];
var message = await _client.GetAsync(address);
if (message.IsSuccessStatusCode)
{
var messageContent = await message.Content.ReadAsStringAsync();
var buffer = Encoding.UTF8.GetBytes(messageContent);
}
}
}
foundBridge = true;
};
await socket.BindEndpointAsync(null, string.Empty);
socket.JoinMulticastGroup(multicastIP);
while(true)
{
foundBridge = false;
using (var stream = await socket.GetOutputStreamAsync(multicastIP, "1900"))
using (var writer = new DataWriter(stream))
{
var request = new StringBuilder();
request.AppendLine("M-SEARCH * HTTP/1.1");
request.AppendLine("HOST: 239.255.255.250:1900");
request.AppendLine("MAN: ssdp:discover");
request.AppendLine("MX: 3");
request.AppendLine("ST: ssdp:all");
writer.WriteString(request.ToString());
await writer.StoreAsync();
if (timeOut > TimeSpan.Zero)
{
await Task.Delay(timeOut);
}
if (foundBridge)
{
break;
}
}
}
}
}
public async Task<bool> InitializeRecv()
{
recvInitialized = false;
try
{
if (msocketRecv != null)
{
msocketRecv.MessageReceived -= UDPMulticastMessageReceived;
msocketRecv.Dispose();
msocketRecv = null;
}
msocketRecv = new DatagramSocket();
msocketRecv.MessageReceived += UDPMulticastMessageReceived;
NetworkAdapter adapter = GetDefaultNetworkAdapter();
if (adapter != null)
await msocketRecv.BindServiceNameAsync(mPort);
// await msocketRecv.BindServiceNameAsync(mPort, adapter);
else
await msocketRecv.BindServiceNameAsync(mPort);
HostName mcast = new HostName(mAddress);
msocketRecv.JoinMulticastGroup(mcast);
mLastIDReceived = 0;
recvInitialized = true;
}
catch(Exception e)
{
System.Diagnostics.Debug.WriteLine("Exception while listening: " + e.Message);
recvInitialized = false;
}
return recvInitialized;
}
