public async Task OutOfBand()
{
// Disable auto-renegotiation
suspendOffer1_ = true;
suspendOffer2_ = true;
// Add out-of-band data channels
const int DataChannelId = 42;
DataChannel data1 = await pc1_.AddDataChannelAsync(DataChannelId, "my_channel", ordered : true, reliable : true);
DataChannel data2 = await pc2_.AddDataChannelAsync(DataChannelId, "my_channel", ordered : true, reliable : true);
// Check consistency
Assert.AreEqual(data1.ID, data2.ID);
Assert.AreEqual(data1.Label, data2.Label);
// Prepare for state change
var evOpen1 = new ManualResetEventSlim(initialState: false);
data1.StateChanged += () =>
{
if (data1.State == DataChannel.ChannelState.Open)
{
evOpen1.Set();
}
};
var evOpen2 = new ManualResetEventSlim(initialState: false);
data2.StateChanged += () =>
{
if (data2.State == DataChannel.ChannelState.Open)
{
evOpen2.Set();
}
};
// Connect
StartOfferWith(pc1_);
WaitForSdpExchangeCompleted();
// Wait until the data channels are ready
Assert.True(evOpen1.Wait(TimeSpan.FromSeconds(60.0)));
Assert.True(evOpen2.Wait(TimeSpan.FromSeconds(60.0)));
// Send data
{
var c2 = new ManualResetEventSlim(false);
string sentText = "Some sample text";
byte[] msg = Encoding.UTF8.GetBytes(sentText);
data2.MessageReceived += (byte[] _msg) =>
{
var receivedText = Encoding.UTF8.GetString(_msg);
Assert.AreEqual(sentText, receivedText);
c2.Set();
};
data1.SendMessage(msg);
Assert.True(c2.Wait(TimeSpan.FromSeconds(60.0)));
}
}
/// <summary>
/// This method is called when new data could be send.
/// It will call send() and serialize the data and send it using the dataChannel.
/// </summary>
protected void PosMessageSend()
{
var r = Send();
if (r == null)
{
return;
}
using (var ms = new MemoryStream()) {
binaryFormatter.Serialize(ms, r);
dataChannel.SendMessage(ms.ToArray());
}
}
private void ChatSendButton_Click(object sender, RoutedEventArgs e)
{
if (string.IsNullOrWhiteSpace(chatInputBox.Text))
{
return;
}
byte[] chatMessage = System.Text.Encoding.UTF8.GetBytes(chatInputBox.Text);
_chatDataChannel.SendMessage(chatMessage);
chatTextBox.Text += $"[local] {chatInputBox.Text}\n";
chatScrollViewer.ChangeView(chatScrollViewer.HorizontalOffset,
chatScrollViewer.ScrollableHeight,
chatScrollViewer.ZoomFactor); // scroll to end
chatInputBox.Text = string.Empty;
}
private void Window_MouseMove(object sender, MouseEventArgs e)
{
if (_dc != null && _dc.State == DataChannel.ChannelState.Open)
{
var mousePos = Mouse.GetPosition(this);
var mouseEvent = new MouseMoveEvent()
{
WindowHeight = this.Height,
WindowWidth = this.Width,
MouseX = mousePos.X,
MouseY = mousePos.Y,
};
var msg = JsonConvert.SerializeObject(mouseEvent);
_dc.SendMessage(Encoding.UTF8.GetBytes(msg));
}
}
public async Task InBand()
{
// Setup
var config = new PeerConnectionConfiguration();
var pc1 = new PeerConnection();
var pc2 = new PeerConnection();
await pc1.InitializeAsync(config);
await pc2.InitializeAsync(config);
pc1.LocalSdpReadytoSend += (string type, string sdp) =>
{
pc2.SetRemoteDescription(type, sdp);
if (type == "offer")
{
pc2.CreateAnswer();
}
};
pc2.LocalSdpReadytoSend += (string type, string sdp) =>
{
pc1.SetRemoteDescription(type, sdp);
if (type == "offer")
{
pc1.CreateAnswer();
}
};
pc1.IceCandidateReadytoSend += (string candidate, int sdpMlineindex, string sdpMid)
=> pc2.AddIceCandidate(sdpMid, sdpMlineindex, candidate);
pc2.IceCandidateReadytoSend += (string candidate, int sdpMlineindex, string sdpMid)
=> pc1.AddIceCandidate(sdpMid, sdpMlineindex, candidate);
// Add dummy out-of-band data channel to force SCTP negotiating.
// Otherwise after connecting AddDataChannelAsync() will fail.
await pc1.AddDataChannelAsync(42, "dummy", false, false);
await pc2.AddDataChannelAsync(42, "dummy", false, false);
// Connect
{
var c1 = new ManualResetEventSlim(false);
var c2 = new ManualResetEventSlim(false);
pc1.Connected += () => c1.Set();
pc2.Connected += () => c2.Set();
Assert.True(pc1.CreateOffer());
Assert.True(c1.Wait(TimeSpan.FromSeconds(60.0)));
Assert.True(c2.Wait(TimeSpan.FromSeconds(60.0)));
Assert.True(pc1.IsConnected);
Assert.True(pc1.IsConnected);
}
// Negotiate data channel in-band
DataChannel data1 = null;
DataChannel data2 = null;
{
var c2 = new ManualResetEventSlim(false);
pc2.DataChannelAdded += (DataChannel channel) =>
{
data2 = channel;
c2.Set();
};
data1 = await pc1.AddDataChannelAsync("test_data_channel", true, true);
Assert.IsNotNull(data1);
Assert.True(c2.Wait(TimeSpan.FromSeconds(60.0)));
Assert.IsNotNull(data2);
Assert.AreEqual(data1.Label, data2.Label);
// Do not test DataChannel.ID; at this point for in-band channels the ID has not
// been agreed upon with the remote peer yet.
}
// Send data
{
var c2 = new ManualResetEventSlim(false);
string sentText = "Some sample text";
byte[] msg = Encoding.UTF8.GetBytes(sentText);
data2.MessageReceived += (byte[] _msg) =>
{
var receivedText = Encoding.UTF8.GetString(_msg);
Assert.AreEqual(sentText, receivedText);
c2.Set();
};
data1.SendMessage(msg);
Assert.True(c2.Wait(TimeSpan.FromSeconds(60.0)));
}
// Clean-up
pc1.Close();
pc1.Dispose();
pc2.Close();
pc2.Dispose();
}
public async Task InBand()
{
// Disable auto-renegotiation
suspendOffer1_ = true;
suspendOffer2_ = true;
// Add dummy out-of-band data channel to force SCTP negotiating.
// Otherwise after connecting AddDataChannelAsync() will fail.
await pc1_.AddDataChannelAsync(42, "dummy", false, false);
await pc2_.AddDataChannelAsync(42, "dummy", false, false);
Assert.True(renegotiationEvent1_.Wait(TimeSpan.FromSeconds(60.0)));
Assert.True(renegotiationEvent2_.Wait(TimeSpan.FromSeconds(60.0)));
renegotiationEvent1_.Reset();
renegotiationEvent2_.Reset();
// Connect
StartOfferWith(pc1_);
WaitForSdpExchangeCompleted();
// Ensure auto-renegotiation is active
suspendOffer1_ = false;
suspendOffer2_ = false;
// Negotiate data channel in-band
DataChannel data1 = null;
DataChannel data2 = null;
{
var c2 = new ManualResetEventSlim(false);
pc2_.DataChannelAdded += (DataChannel channel) =>
{
data2 = channel;
c2.Set();
};
// Note that for SCTP data channels (always the case in MixedReality-WebRTC) a renegotiation
// needed event is triggered only on the first data channel created. Since dummy channels were
// added above to trigger SCTP handshake, this one below will not trigger a renegotiation event.
data1 = await pc1_.AddDataChannelAsync("test_data_channel", ordered : true, reliable : true);
Assert.IsNotNull(data1);
Assert.True(c2.Wait(TimeSpan.FromSeconds(60.0)));
Assert.IsNotNull(data2);
Assert.AreEqual(data1.ID, data2.ID);
Assert.AreEqual(data1.Label, data2.Label);
}
// Send data
{
var c2 = new ManualResetEventSlim(false);
string sentText = "Some sample text";
byte[] msg = Encoding.UTF8.GetBytes(sentText);
data2.MessageReceived += (byte[] _msg) =>
{
var receivedText = Encoding.UTF8.GetString(_msg);
Assert.AreEqual(sentText, receivedText);
c2.Set();
};
data1.SendMessage(msg);
Assert.True(c2.Wait(TimeSpan.FromSeconds(60.0)));
}
}
static async Task Main(string[] args)
{
DataChannel dataChannel = null;
try
{
// Create a new peer connection automatically disposed at the end of the program
using var pc = new PeerConnection();
// Initialize the connection with a STUN server to allow remote access
var config = new PeerConnectionConfiguration
{
IceServers = new List <IceServer> {
new IceServer {
Urls = { "stun:stun.l.google.com:19302" }
}
}
};
await pc.InitializeAsync(config);
Console.WriteLine("Peer connection initialized.");
Console.WriteLine("Opening data channel");
dataChannel = await pc.AddDataChannelAsync("data", true, true);
// Setup signaling
Console.WriteLine("Starting signaling...");
var signaler = new NamedPipeSignaler.NamedPipeSignaler(pc, "testpipe");
signaler.SdpMessageReceived += (string type, string sdp) => {
pc.SetRemoteDescription(type, sdp);
if (type == "offer")
{
pc.CreateAnswer();
}
};
signaler.IceCandidateReceived += (string sdpMid, int sdpMlineindex, string candidate) => {
pc.AddIceCandidate(sdpMid, sdpMlineindex, candidate);
};
await signaler.StartAsync();
// Start peer connection
pc.Connected += () => { Console.WriteLine("PeerConnection: connected."); };
pc.IceStateChanged += (IceConnectionState newState) => { Console.WriteLine($"ICE state: {newState}"); };
pc.DataChannelAdded += (DataChannel c) =>
{
Console.WriteLine("DataChannel added");
c.MessageReceived += (byte[] _msg) =>
{
Console.WriteLine("received {0} bytes", _msg.Length);
};
};
if (signaler.IsClient)
{
Console.WriteLine("Connecting to remote peer...");
pc.CreateOffer();
}
else
{
Console.WriteLine("Waiting for offer from remote peer...");
}
Console.WriteLine("Press a 'S' to send data. 'Esc' to exit ...");
ConsoleKeyInfo key;
while ((key = Console.ReadKey(true)).Key != ConsoleKey.Escape)
{
if (key.Key == ConsoleKey.S)
{
Console.WriteLine("Sending data");
dataChannel.SendMessage(new byte[3000]);
}
}
signaler.Stop();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.WriteLine("Program termined.");
}
