private static async Task WebSocketMessageReceived(WebSocketContext context, RTCPeerConnection pc, string message)
{
try
{
if (pc.localDescription == null)
{
//logger.LogDebug("Offer SDP: " + message);
logger.LogDebug("Offer SDP received.");
// Add local media tracks depending on what was offered. Also add local tracks with the same media ID as
// the remote tracks so that the media announcement in the SDP answer are in the same order.
SDP remoteSdp = SDP.ParseSDPDescription(message);
var res = pc.setRemoteDescription(new RTCSessionDescriptionInit {
sdp = message, type = RTCSdpType.offer
});
if (res != SetDescriptionResultEnum.OK)
{
// No point continuing. Something will need to change and then try again.
pc.Close("failed to set remote sdp");
}
else
{
var answer = pc.createAnswer(null);
await pc.setLocalDescription(answer);
context.WebSocket.Send(answer.sdp);
}
}
else if (pc.remoteDescription == null)
{
logger.LogDebug("Answer SDP: " + message);
var res = pc.setRemoteDescription(new RTCSessionDescriptionInit {
sdp = message, type = RTCSdpType.answer
});
if (res != SetDescriptionResultEnum.OK)
{
// No point continuing. Something will need to change and then try again.
pc.Close("failed to set remote sdp");
}
}
else
{
logger.LogDebug("ICE Candidate: " + message);
if (string.IsNullOrWhiteSpace(message) || message.Trim().ToLower() == SDP.END_ICE_CANDIDATES_ATTRIBUTE)
{
logger.LogDebug("End of candidates message received.");
}
else
{
var candInit = Newtonsoft.Json.JsonConvert.DeserializeObject <RTCIceCandidateInit>(message);
pc.addIceCandidate(candInit);
}
}
}
catch (Exception excp)
{
logger.LogError("Exception WebSocketMessageReceived. " + excp.Message);
}
}
private static async void WebSocketMessageReceived(WebSocketContext context, RTCPeerConnection peerConnection, string msg)
{
if (peerConnection.RemoteDescription != null)
{
Console.WriteLine($"ICE Candidate: {msg}.");
//await _peerConnections[0].addIceCandidate(new RTCIceCandidateInit { candidate = msg });
// await peerConnection.addIceCandidate(new RTCIceCandidateInit { candidate = msg });
Console.WriteLine("add ICE candidate complete.");
}
else
{
//Console.WriteLine($"websocket recv: {msg}");
//var offerSDP = SDP.ParseSDPDescription(msg);
Console.WriteLine($"offer sdp: {msg}");
peerConnection.setRemoteDescription(new RTCSessionDescriptionInit {
sdp = msg, type = RTCSdpType.offer
});
var answerInit = peerConnection.createAnswer(null);
await peerConnection.setLocalDescription(answerInit);
Console.WriteLine($"answer sdp: {answerInit.sdp}");
context.WebSocket.Send(answerInit.sdp);
}
}
public async Task Connect()
{
TaskCompletionSource <bool> dcAOpened = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
DC = await PCSrc.createDataChannel($"{DATACHANNEL_LABEL_PREFIX}-{ID}-a");
DC.onopen += () =>
{
Console.WriteLine($"Peer connection pair {Name} A data channel opened.");
StreamSendConfirmed.TryAdd(DC.id.Value, new ManualResetEventSlim());
dcAOpened.TrySetResult(true);
};
var offer = PCSrc.createOffer();
await PCSrc.setLocalDescription(offer);
if (PCDst.setRemoteDescription(offer) != SetDescriptionResultEnum.OK)
{
throw new ApplicationException($"SDP negotiation failed for peer connection pair {Name}.");
}
var answer = PCDst.createAnswer();
await PCDst.setLocalDescription(answer);
if (PCSrc.setRemoteDescription(answer) != SetDescriptionResultEnum.OK)
{
throw new ApplicationException($"SDP negotiation failed for peer connection pair {Name}.");
}
await Task.WhenAll(dcAOpened.Task);
}
public async void CheckPeerConnectionEstablishment()
{
logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
var aliceConnected = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
var bobConnected = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
var alice = new RTCPeerConnection();
alice.onconnectionstatechange += (state) =>
{
if (state == RTCPeerConnectionState.connected)
{
logger.LogDebug("Alice connected.");
aliceConnected.SetResult(true);
}
};
alice.addTrack(new MediaStreamTrack(SDPWellKnownMediaFormatsEnum.PCMU));
var aliceOffer = alice.createOffer();
await alice.setLocalDescription(aliceOffer);
logger.LogDebug($"alice offer: {aliceOffer.sdp}");
var bob = new RTCPeerConnection();
bob.onconnectionstatechange += (state) =>
{
if (state == RTCPeerConnectionState.connected)
{
logger.LogDebug("Bob connected.");
bobConnected.SetResult(true);
}
};
bob.addTrack(new MediaStreamTrack(SDPWellKnownMediaFormatsEnum.PCMU));
var setOfferResult = bob.setRemoteDescription(aliceOffer);
Assert.Equal(SetDescriptionResultEnum.OK, setOfferResult);
var bobAnswer = bob.createAnswer();
await bob.setLocalDescription(bobAnswer);
var setAnswerResult = alice.setRemoteDescription(bobAnswer);
Assert.Equal(SetDescriptionResultEnum.OK, setAnswerResult);
logger.LogDebug($"answer: {bobAnswer.sdp}");
await Task.WhenAny(Task.WhenAll(aliceConnected.Task, bobConnected.Task), Task.Delay(2000));
Assert.True(aliceConnected.Task.IsCompleted);
Assert.True(aliceConnected.Task.Result);
Assert.True(bobConnected.Task.IsCompleted);
Assert.True(bobConnected.Task.Result);
bob.close();
alice.close();
}
private static async Task WebSocketMessageReceived(WebSocketContext context, RTCPeerConnection pc, string message)
{
try
{
if (pc.localDescription == null)
{
//logger.LogDebug("Offer SDP: " + message);
logger.LogDebug("Offer SDP received.");
// Add local media tracks depending on what was offered. Also add local tracks with the same media ID as
// the remote tracks so that the media announcement in the SDP answer are in the same order.
SDP remoteSdp = SDP.ParseSDPDescription(message);
foreach (var ann in remoteSdp.Media)
{
var capbilities = FilterCodecs(ann.Media, ann.MediaFormats);
MediaStreamTrack track = new MediaStreamTrack(ann.Media, false, capbilities, MediaStreamStatusEnum.RecvOnly);
pc.addTrack(track);
}
pc.setRemoteDescription(new RTCSessionDescriptionInit {
sdp = message, type = RTCSdpType.offer
});
var answer = pc.createAnswer(null);
await pc.setLocalDescription(answer);
Console.WriteLine(answer.sdp);
context.WebSocket.Send(answer.sdp);
}
else if (pc.remoteDescription == null)
{
logger.LogDebug("Answer SDP: " + message);
pc.setRemoteDescription(new RTCSessionDescriptionInit {
sdp = message, type = RTCSdpType.answer
});
}
else
{
logger.LogDebug("ICE Candidate: " + message);
if (string.IsNullOrWhiteSpace(message) || message.Trim().ToLower() == SDP.END_ICE_CANDIDATES_ATTRIBUTE)
{
logger.LogDebug("End of candidates message received.");
}
else
{
var candInit = Newtonsoft.Json.JsonConvert.DeserializeObject <RTCIceCandidateInit>(message);
pc.addIceCandidate(candInit);
}
}
}
catch (Exception excp)
{
logger.LogError("Exception WebSocketMessageReceived. " + excp.Message);
}
}
private static async Task WebSocketMessageReceived(WebSocketContext context, RTCPeerConnection peerConnection, string message)
{
try
{
if (peerConnection.localDescription == null)
{
logger.LogDebug("Offer SDP: " + message);
// Add local media tracks depending on what was offered. Also add local tracks with the same media ID as
// the remote tracks so that the media announcement in the SDP answer are in the same order.
SDP remoteSdp = SDP.ParseSDPDescription(message);
var remoteAudioAnn = remoteSdp.Media.Where(x => x.Media == SDPMediaTypesEnum.audio).FirstOrDefault();
var remoteVideoAnn = remoteSdp.Media.Where(x => x.Media == SDPMediaTypesEnum.video).FirstOrDefault();
if (remoteAudioAnn != null)
{
MediaStreamTrack audioTrack = new MediaStreamTrack(remoteAudioAnn.MediaID, SDPMediaTypesEnum.audio, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.PCMU)
}, MediaStreamStatusEnum.RecvOnly);
peerConnection.addTrack(audioTrack);
}
if (remoteVideoAnn != null)
{
MediaStreamTrack videoTrack = new MediaStreamTrack(remoteVideoAnn.MediaID, SDPMediaTypesEnum.video, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.VP8)
}, MediaStreamStatusEnum.RecvOnly);
peerConnection.addTrack(videoTrack);
}
// After local media tracks have been added the remote description can be set.
await peerConnection.setRemoteDescription(new RTCSessionDescriptionInit { sdp = message, type = RTCSdpType.offer });
var answer = await peerConnection.createAnswer(null);
await peerConnection.setLocalDescription(answer);
context.WebSocket.Send(answer.sdp);
}
else if (peerConnection.remoteDescription == null)
{
logger.LogDebug("Answer SDP: " + message);
await peerConnection.setRemoteDescription(new RTCSessionDescriptionInit { sdp = message, type = RTCSdpType.answer });
}
else
{
logger.LogDebug("ICE Candidate: " + message);
await peerConnection.addIceCandidate(new RTCIceCandidateInit { candidate = message });
}
}
catch (Exception excp)
{
logger.LogError("Exception WebSocketMessageReceived. " + excp.Message);
}
}
private ResonanceActionResult <WebRTCOfferResponse> OnWebRTCOfferRequest(WebRTCOfferRequest request)
{
if (request.ChannelName != ChannelName)
{
return(null);
}
try
{
Logger.LogInformation("Offer received...");
if (!_connectionInitialized)
{
InitConnection();
}
Logger.LogInformation("Setting remote description...");
var result = _connection.setRemoteDescription(request.Offer.ToSessionDescription());
if (result != SetDescriptionResultEnum.OK)
{
throw new Exception("Error setting remote description.");
}
if (request.Offer.InternalType == RTCSdpType.offer)
{
Logger.LogInformation("Creating answer...");
var answer = _connection.createAnswer(null);
Logger.LogInformation("Setting local description...");
_connection.setLocalDescription(answer).GetAwaiter().GetResult();
Logger.LogInformation("Sending answer response...");
return(new ResonanceActionResult <WebRTCOfferResponse>(
new WebRTCOfferResponse()
{
ChannelName = ChannelName,
Answer = WebRTCSessionDescription.FromSessionDescription(answer)
}));
}
else
{
Logger.LogError($"Invalid offer type received '{request.Offer.InternalType}'.");
}
throw new Exception("Invalid offer request.");
}
catch (Exception ex)
{
FailConnection(ex);
throw ex;
}
}
public async void CheckDataChannelEstablishment()
{
logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
var aliceDataConnected = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
var bobDataOpened = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
var alice = new RTCPeerConnection();
var dc = await alice.createDataChannel("dc1", null);
dc.onopen += () => aliceDataConnected.TrySetResult(true);
var aliceOffer = alice.createOffer();
await alice.setLocalDescription(aliceOffer);
logger.LogDebug($"alice offer: {aliceOffer.sdp}");
var bob = new RTCPeerConnection();
RTCDataChannel bobData = null;
bob.ondatachannel += (chan) =>
{
bobData = chan;
bobDataOpened.TrySetResult(true);
};
var setOfferResult = bob.setRemoteDescription(aliceOffer);
Assert.Equal(SetDescriptionResultEnum.OK, setOfferResult);
var bobAnswer = bob.createAnswer();
await bob.setLocalDescription(bobAnswer);
var setAnswerResult = alice.setRemoteDescription(bobAnswer);
Assert.Equal(SetDescriptionResultEnum.OK, setAnswerResult);
logger.LogDebug($"answer: {bobAnswer.sdp}");
await Task.WhenAny(Task.WhenAll(aliceDataConnected.Task, bobDataOpened.Task), Task.Delay(2000));
Assert.True(aliceDataConnected.Task.IsCompleted);
Assert.True(aliceDataConnected.Task.Result);
Assert.True(bobDataOpened.Task.IsCompleted);
Assert.True(bobDataOpened.Task.Result);
Assert.True(dc.IsOpened);
Assert.True(bobData.IsOpened);
bob.close();
alice.close();
}
public void SendVideoRtcpFeedbackReportUnitTest()
{
logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
RTCConfiguration pcConfiguration = new RTCConfiguration
{
certificates = new List <RTCCertificate>
{
new RTCCertificate
{
X_Fingerprint = "sha-256 C6:ED:8C:9D:06:50:77:23:0A:4A:D8:42:68:29:D0:70:2F:BB:C7:72:EC:98:5C:62:07:1B:0C:5D:CB:CE:BE:CD"
}
},
X_UseRtpFeedbackProfile = true
};
RTCPeerConnection pcSrc = new RTCPeerConnection(pcConfiguration);
var videoTrackSrc = new MediaStreamTrack(SDPMediaTypesEnum.video, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.VP8)
});
pcSrc.addTrack(videoTrackSrc);
var offer = pcSrc.createOffer(new RTCOfferOptions());
logger.LogDebug($"offer: {offer.sdp}");
RTCPeerConnection pcDst = new RTCPeerConnection(pcConfiguration);
var videoTrackDst = new MediaStreamTrack(SDPMediaTypesEnum.video, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.VP8)
});
pcDst.addTrack(videoTrackDst);
var setOfferResult = pcDst.setRemoteDescription(offer);
Assert.Equal(SetDescriptionResultEnum.OK, setOfferResult);
var answer = pcDst.createAnswer(null);
var setAnswerResult = pcSrc.setRemoteDescription(answer);
Assert.Equal(SetDescriptionResultEnum.OK, setAnswerResult);
logger.LogDebug($"answer: {answer.sdp}");
RTCPFeedback pliReport = new RTCPFeedback(pcDst.VideoLocalTrack.Ssrc, pcDst.VideoRemoteTrack.Ssrc, PSFBFeedbackTypesEnum.PLI);
pcDst.SendRtcpFeedback(SDPMediaTypesEnum.video, pliReport);
}
public void SendVideoRtcpFeedbackReportUnitTest()
{
logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
RTCConfiguration pcConfiguration = new RTCConfiguration
{
certificates = new List <RTCCertificate>
{
new RTCCertificate
{
Certificate = DtlsUtils.CreateSelfSignedCert()
}
},
X_UseRtpFeedbackProfile = true
};
RTCPeerConnection pcSrc = new RTCPeerConnection(pcConfiguration);
var videoTrackSrc = new MediaStreamTrack(SDPMediaTypesEnum.video, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.VP8)
});
pcSrc.addTrack(videoTrackSrc);
var offer = pcSrc.createOffer(new RTCOfferOptions());
logger.LogDebug($"offer: {offer.sdp}");
RTCPeerConnection pcDst = new RTCPeerConnection(pcConfiguration);
var videoTrackDst = new MediaStreamTrack(SDPMediaTypesEnum.video, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.VP8)
});
pcDst.addTrack(videoTrackDst);
var setOfferResult = pcDst.setRemoteDescription(offer);
Assert.Equal(SetDescriptionResultEnum.OK, setOfferResult);
var answer = pcDst.createAnswer(null);
var setAnswerResult = pcSrc.setRemoteDescription(answer);
Assert.Equal(SetDescriptionResultEnum.OK, setAnswerResult);
logger.LogDebug($"answer: {answer.sdp}");
RTCPFeedback pliReport = new RTCPFeedback(pcDst.VideoLocalTrack.Ssrc, pcDst.VideoRemoteTrack.Ssrc, PSFBFeedbackTypesEnum.PLI);
pcDst.SendRtcpFeedback(SDPMediaTypesEnum.video, pliReport);
}
private static async Task WebSocketMessageReceived(WebSocketContext context, RTCPeerConnection peerConnection, string message)
{
try
{
if (peerConnection.localDescription == null)
{
//logger.LogDebug("Offer SDP: " + message);
logger.LogDebug("Offer SDP received.");
// Add local media tracks depending on what was offered. Also add local tracks with the same media ID as
// the remote tracks so that the media announcement in the SDP answer are in the same order.
SDP remoteSdp = SDP.ParseSDPDescription(message);
await peerConnection.setRemoteDescription(new RTCSessionDescriptionInit { sdp = message, type = RTCSdpType.offer });
var answer = await peerConnection.createAnswer(null);
await peerConnection.setLocalDescription(answer);
context.WebSocket.Send(answer.sdp);
}
else if (peerConnection.remoteDescription == null)
{
logger.LogDebug("Answer SDP: " + message);
await peerConnection.setRemoteDescription(new RTCSessionDescriptionInit { sdp = message, type = RTCSdpType.answer });
}
else
{
logger.LogDebug("ICE Candidate: " + message);
if (string.IsNullOrWhiteSpace(message) || message.Trim().ToLower() == SDP.END_ICE_CANDIDATES_ATTRIBUTE)
{
logger.LogDebug("End of candidates message received.");
}
else
{
await peerConnection.addIceCandidate(new RTCIceCandidateInit { candidate = message });
}
}
}
catch (Exception excp)
{
logger.LogError("Exception WebSocketMessageReceived. " + excp.Message);
}
}
private void DoProcessMessage(Message message)
{
switch (message.type)
{
case "Offer":
// var offer = JsonUtility.FromJson<RTCSessionDescriptionInit>(message.args);
if (RTCSessionDescriptionInit.TryParse(message.args, out RTCSessionDescriptionInit offer))
{
Debug.Log($"Got remote SDP, type {offer.type}");
var result = rtcPeerConnection.setRemoteDescription(offer);
if (result != SetDescriptionResultEnum.OK)
{
Debug.Log($"Failed to set remote description, {result}.");
rtcPeerConnection.Close("Failed to set remote description");
}
else
{
if (rtcPeerConnection.signalingState == RTCSignalingState.have_remote_offer)
{
var answerSdp = rtcPeerConnection.createAnswer();
rtcPeerConnection.setLocalDescription(answerSdp);
Debug.Log($"Sending SDP answer");
Send("Offer", answerSdp.toJSON());
}
}
}
break;
case "IceCandidate":
if (RTCIceCandidateInit.TryParse(message.args, out RTCIceCandidateInit candidate))
{
Debug.Log($"Got remote Ice Candidate, uri {candidate.candidate}");
rtcPeerConnection.addIceCandidate(candidate);
}
break;
}
}
/// <summary>
/// This application spits out a lot of log messages. In an attempt to make command entry slightly more usable
/// this method attempts to always write the current command input as the bottom line on the console output.
/// </summary>
private static async Task ProcessInput(CancellationTokenSource cts)
{
// Local function to write the current command in the process of being entered.
Action <int, string> writeCommandPrompt = (lastPromptRow, cmd) =>
{
// The cursor is already at the current row.
if (Console.CursorTop == lastPromptRow)
{
// The command was corrected. Need to re-write the whole line.
Console.SetCursorPosition(0, Console.CursorTop);
Console.Write(new string(' ', Console.WindowWidth));
Console.SetCursorPosition(0, Console.CursorTop);
Console.Write($"{COMMAND_PROMPT}{cmd}");
}
else
{
// The cursor row has changed since the last input. Rewrite the prompt and command
// on the current line.
Console.Write($"{COMMAND_PROMPT}{cmd}");
}
};
string command = null;
int lastInputRow = Console.CursorTop;
while (!cts.IsCancellationRequested)
{
var inKey = Console.ReadKey(true);
if (inKey.Key == ConsoleKey.Enter)
{
if (command == null)
{
Console.WriteLine();
Console.Write(COMMAND_PROMPT);
}
else
{
// Attempt to execute the current command.
switch (command.ToLower())
{
case "c":
// Close active peer connection.
if (_peerConnection != null)
{
Console.WriteLine();
Console.WriteLine("Closing peer connection");
_peerConnection.Close("user initiated");
}
break;
case var x when x.StartsWith("cdc"):
// Attempt to create a new data channel.
if (_peerConnection != null)
{
(_, var label) = x.Split(" ", 2, StringSplitOptions.None);
if (!string.IsNullOrWhiteSpace(label))
{
Console.WriteLine();
Console.WriteLine($"Creating data channel for label {label}.");
var dc = _peerConnection.createDataChannel(label, null);
dc.onmessage += (msg) => logger.LogDebug($" data channel message received on {label}: {msg}");
}
else
{
Console.WriteLine();
Console.WriteLine($"Send message command was in the wrong format. Needs to be: cdc <label>");
}
}
break;
case var x when x.StartsWith("ldc"):
// List data channels.
if (_peerConnection != null)
{
if (_peerConnection.DataChannels.Count > 0)
{
Console.WriteLine();
foreach (var dc in _peerConnection.DataChannels)
{
Console.WriteLine($" data channel: label {dc.label}, stream ID {dc.id}, is open {dc.IsOpened}.");
}
}
else
{
Console.WriteLine();
Console.WriteLine(" no data channels available.");
}
}
break;
case var x when x.StartsWith("sdc"):
// Send data channel message.
if (_peerConnection != null)
{
(_, var label, var msg) = x.Split(" ", 3, StringSplitOptions.None);
if (!string.IsNullOrWhiteSpace(label) && !string.IsNullOrWhiteSpace(msg))
{
Console.WriteLine();
Console.WriteLine($"Sending message on channel {label}: {msg}");
var dc = _peerConnection.DataChannels.FirstOrDefault(x => x.label == label && x.IsOpened);
if (dc != null)
{
dc.send(msg);
}
else
{
Console.WriteLine($"No data channel was found for label {label}.");
}
}
else
{
Console.WriteLine();
Console.WriteLine($"Send data channel message command was in the wrong format. Needs to be: sdc <label> <message>");
}
}
break;
case "q":
// Quit.
Console.WriteLine();
Console.WriteLine("Quitting...");
cts.Cancel();
break;
case "isalive":
// Check responsiveness.
Console.WriteLine();
Console.WriteLine("yep");
Console.Write(COMMAND_PROMPT);
break;
case var x when x.StartsWith("node"):
(_, var sdpType, var myUser, string theirUser) = x.Split(" ", 4, StringSplitOptions.None);
if (sdpType == "so")
{
_peerConnection = Createpc(null, _stunServer);
var offerSdp = _peerConnection.createOffer(null);
await _peerConnection.setLocalDescription(offerSdp);
Console.WriteLine($"Our Offer:\n{offerSdp.sdp}");
var offerJson = JsonConvert.SerializeObject(offerSdp, new Newtonsoft.Json.Converters.StringEnumConverter());
var content = new StringContent(offerJson, Encoding.UTF8, "application/json");
var res = await _nodeDssclient.PostAsync($"{_nodeDssUri}data/{theirUser}", content);
Console.WriteLine($"node-dss POST result {res.StatusCode}.");
}
else if (sdpType == "go")
{
var res = await _nodeDssclient.GetAsync($"{_nodeDssUri}data/{myUser}");
Console.WriteLine($"node-dss GET result {res.StatusCode}.");
if (res.StatusCode == HttpStatusCode.OK)
{
var content = await res.Content.ReadAsStringAsync();
RTCSessionDescriptionInit offerInit = JsonConvert.DeserializeObject <RTCSessionDescriptionInit>(content);
Console.WriteLine($"Remote offer:\n{offerInit.sdp}");
_peerConnection = Createpc(null, _stunServer);
var setRes = _peerConnection.setRemoteDescription(offerInit);
if (setRes != SetDescriptionResultEnum.OK)
{
// No point continuing. Something will need to change and then try again.
_peerConnection.Close("failed to set remote sdp offer");
}
else
{
var answer = _peerConnection.createAnswer(null);
await _peerConnection.setLocalDescription(answer);
Console.WriteLine($"Our answer:\n{answer.sdp}");
var answerJson = JsonConvert.SerializeObject(answer, new Newtonsoft.Json.Converters.StringEnumConverter());
var answerContent = new StringContent(answerJson, Encoding.UTF8, "application/json");
var postRes = await _nodeDssclient.PostAsync($"{_nodeDssUri}data/{theirUser}", answerContent);
Console.WriteLine($"node-dss POST result {res.StatusCode}.");
}
}
}
else if (sdpType == "ga")
{
var res = await _nodeDssclient.GetAsync($"{_nodeDssUri}data/{myUser}");
Console.WriteLine($"node-dss GET result {res.StatusCode}.");
if (res.StatusCode == HttpStatusCode.OK)
{
var content = await res.Content.ReadAsStringAsync();
RTCSessionDescriptionInit answerInit = JsonConvert.DeserializeObject <RTCSessionDescriptionInit>(content);
Console.WriteLine($"Remote answer:\n{answerInit.sdp}");
var setRes = _peerConnection.setRemoteDescription(answerInit);
if (setRes != SetDescriptionResultEnum.OK)
{
// No point continuing. Something will need to change and then try again.
_peerConnection.Close("failed to set remote sdp answer");
}
}
}
break;
default:
// Command not recognised.
Console.WriteLine();
Console.WriteLine($"Unknown command: {command}");
Console.Write(COMMAND_PROMPT);
break;
}
command = null;
}
}
else if (inKey.Key == ConsoleKey.UpArrow)
{
// Convenience mechanism to get the current input prompt without
// needing to change the command being entered.
writeCommandPrompt(lastInputRow, command);
}
else if (inKey.Key == ConsoleKey.Escape)
{
// Escape key clears the current command.
command = null;
writeCommandPrompt(lastInputRow, command);
}
else if (inKey.Key == ConsoleKey.Backspace)
{
// Backspace removes the last character.
command = (command?.Length > 0) ? command.Substring(0, command.Length - 1) : null;
writeCommandPrompt(lastInputRow, command);
}
else if (!Char.IsControl(inKey.KeyChar))
{
// Non-control character, append to current command.
command += inKey.KeyChar;
if (Console.CursorTop == lastInputRow)
{
Console.Write(inKey.KeyChar);
}
else
{
writeCommandPrompt(lastInputRow, command);
}
}
lastInputRow = Console.CursorTop;
}
}
public async Task <RTCSessionDescriptionInit> GotOffer(RTCSessionDescriptionInit offer)
{
logger.LogTrace($"SDP offer received.");
logger.LogTrace(offer.sdp);
var pc = new RTCPeerConnection();
if (_presetIceAddresses != null)
{
foreach (var addr in _presetIceAddresses)
{
var rtpPort = pc.GetRtpChannel().RTPPort;
var publicIPv4Candidate = new RTCIceCandidate(RTCIceProtocol.udp, addr, (ushort)rtpPort, RTCIceCandidateType.host);
pc.addLocalIceCandidate(publicIPv4Candidate);
}
}
MediaStreamTrack audioTrack = new MediaStreamTrack(SDPWellKnownMediaFormatsEnum.PCMU);
pc.addTrack(audioTrack);
MediaStreamTrack videoTrack = new MediaStreamTrack(new VideoFormat(VideoCodecsEnum.VP8, VP8_PAYLOAD_ID));
pc.addTrack(videoTrack);
pc.OnRtpPacketReceived += (IPEndPoint rep, SDPMediaTypesEnum media, RTPPacket rtpPkt) =>
{
pc.SendRtpRaw(media, rtpPkt.Payload, rtpPkt.Header.Timestamp, rtpPkt.Header.MarkerBit, rtpPkt.Header.PayloadType);
};
pc.OnTimeout += (mediaType) => logger.LogWarning($"Timeout for {mediaType}.");
pc.oniceconnectionstatechange += (state) => logger.LogInformation($"ICE connection state changed to {state}.");
pc.onsignalingstatechange += () => logger.LogInformation($"Signaling state changed to {pc.signalingState}.");
pc.onconnectionstatechange += (state) =>
{
logger.LogInformation($"Peer connection state changed to {state}.");
if (state == RTCPeerConnectionState.failed)
{
pc.Close("ice failure");
}
};
var setResult = pc.setRemoteDescription(offer);
if (setResult == SetDescriptionResultEnum.OK)
{
var offerSdp = pc.createOffer(null);
await pc.setLocalDescription(offerSdp);
var answer = pc.createAnswer(null);
logger.LogTrace($"SDP answer created.");
logger.LogTrace(answer.sdp);
return(answer);
}
else
{
logger.LogWarning($"Failed to set remote description {setResult}.");
return(null);
}
}
private static async void WebSocketMessageReceived(WebSocketContext context, RTCPeerConnection peerConnection, string msg)
{
if (peerConnection.RemoteDescription != null)
{
Console.WriteLine($"ICE Candidate: {msg}.");
//await _peerConnections[0].addIceCandidate(new RTCIceCandidateInit { candidate = msg });
// await peerConnection.addIceCandidate(new RTCIceCandidateInit { candidate = msg });
Console.WriteLine("add ICE candidate complete.");
}
else
{
//Console.WriteLine($"websocket recv: {msg}");
//var offerSDP = SDP.ParseSDPDescription(msg);
Console.WriteLine($"offer sdp: {msg}");
var dtls = new DtlsHandshake(DTLS_CERTIFICATE_PATH, DTLS_KEY_PATH);
await peerConnection.setRemoteDescription(new RTCSessionDescriptionInit { sdp = msg, type = RTCSdpType.offer });
peerConnection.OnReceiveReport += RtpSession_OnReceiveReport;
peerConnection.OnSendReport += RtpSession_OnSendReport;
peerConnection.onconnectionstatechange += (state) =>
{
if (state == RTCPeerConnectionState.closed)
{
Console.WriteLine($"webrtc session closed.");
//_peerConnections.Remove(peerConnection);
}
};
peerConnection.oniceconnectionstatechange += (state) =>
{
if (state == RTCIceConnectionState.connected)
{
Console.WriteLine("Starting DTLS handshake task.");
bool dtlsResult = false;
Task.Run(async() => dtlsResult = await DoDtlsHandshake(peerConnection, dtls))
.ContinueWith((t) =>
{
Console.WriteLine($"dtls handshake result {dtlsResult}.");
if (dtlsResult)
{
//peerConnection.SetDestination(SDPMediaTypesEnum.audio, peerConnection.IceSession.ConnectedRemoteEndPoint, peerConnection.IceSession.ConnectedRemoteEndPoint);
//_peerConnections.Add(peerConnection);
peerConnection.OnRtpPacketReceived += RtpSession_OnRtpPacketReceived;
}
else
{
dtls.Shutdown();
peerConnection.Close("dtls handshake failed.");
}
});
}
};
var answerInit = await peerConnection.createAnswer(null);
await peerConnection.setLocalDescription(answerInit);
Console.WriteLine($"answer sdp: {answerInit.sdp}");
context.WebSocket.Send(answerInit.sdp);
}
}
public RTCSessionDescriptionInit GetSdpAnswer(SdpAnswerRequestArgs args)
{
ConnectionId = args.ConnectionId;
RTCConfiguration config = new RTCConfiguration
{
X_UseRtpFeedbackProfile = true
};
var pc = new RTCPeerConnection(config);
// Add local receive only tracks. This ensures that the SDP answer includes only the codecs we support.
if (!_noAudio)
{
MediaStreamTrack audioTrack = new MediaStreamTrack(SDPMediaTypesEnum.audio, false,
new List <SDPAudioVideoMediaFormat> {
new SDPAudioVideoMediaFormat(SDPWellKnownMediaFormatsEnum.PCMU)
}, MediaStreamStatusEnum.RecvOnly);
pc.addTrack(audioTrack);
}
// MediaStreamTrack videoTrack = new MediaStreamTrack(new VideoFormat(96, "VP8", 90000, "x-google-max-bitrate=5000000"), MediaStreamStatusEnum.RecvOnly);
// pc.OnVideoFrameReceived += _videoSink.GotVideoFrame;
// pc.OnVideoFormatsNegotiated += (formats) => _videoSink.SetVideoSinkFormat(formats.First());
pc.OnVideoFrameReceived += (endpoint, rtpTimestampMs, frame, format) =>
{
int frameLength = frame.Length;
string rtpTimestamp = new DateTime(rtpTimestampMs * 100).ToString("dd.MM.yyyy HH:mm:ss,ffff");
string timestamp = "none";
long timestampMs = 0;
if (ExtractTimestampFromFrame)
{
frameLength -= 8;
var span = new Span <byte>(frame, frameLength, 8);
span.Reverse();
timestampMs = BitConverter.ToInt64(span);
if (timestampMs > 0 && timestampMs < 4398046511104)
{
timestamp = DateTime.UnixEpoch.AddMilliseconds(timestampMs).ToString("dd.MM.yyyy HH:mm:ss,ffff");
}
}
Console.WriteLine($"On frame received: byte[{frame.Length}], rtpTs: {rtpTimestamp} extractedTs: {timestamp})");
_listener.OnFrameReceived(this, new Memory <byte>(frame, 0, frameLength), rtpTimestampMs, timestampMs);
};
pc.onicecandidate += (iceCandidate) =>
{
Console.WriteLine("On ice candidate");
_listener.OnIceCandidate(this, iceCandidate);
};
pc.onconnectionstatechange += (state) =>
{
Console.WriteLine($"Peer connection state change to {state}.");
if (state == RTCPeerConnectionState.failed)
{
pc.Close("ice disconnection");
}
_listener.OnConnectionStateChanged(this, state);
};
pc.OnSendReport += (media, sr) => Console.WriteLine($"RTCP Send for {media}\n{sr.GetDebugSummary()}");
pc.oniceconnectionstatechange += (state) => Console.WriteLine($"ICE connection state change to {state}.");
var sdpOffer = SDP.ParseSDPDescription(args.SdpOffer);
//sdpOffer.Media.FirstOrDefault()?.
var videoMedia = sdpOffer.Media.FirstOrDefault(m => m.Media == SDPMediaTypesEnum.video);
var h264VideoFormat = videoMedia.MediaFormats.Values.First(m => m.Rtpmap == "H264/90000").ToVideoFormat();
var videoTrack = new MediaStreamTrack(h264VideoFormat, MediaStreamStatusEnum.RecvOnly);
pc.addTrack(videoTrack);
//var track = new MediaStreamTrack(SDPMediaTypesEnum.video, false, new List<SDPAudioVideoMediaFormat> { new SDPAudioVideoMediaFormat(SDPMediaTypesEnum.video, 102, "H264", 90000) });
//pc.addTrack(track);
var setRemoteDescriptionResult = pc.setRemoteDescription(new RTCSessionDescriptionInit
{
type = RTCSdpType.offer,
sdp = args.SdpOffer
});
//MediaStreamTrack videoTrack = new MediaStreamTrack(new VideoFormat(VideoCodecsEnum.H264, 102), MediaStreamStatusEnum.RecvOnly);
//pc.addTrack(videoTrack);
var answer = pc.createAnswer();
var setLocalDescriptionResult = pc.setLocalDescription(answer);
Console.WriteLine("SDP Offer:\n" + args.SdpOffer);
Console.WriteLine("SDP Answer 2:\n" + answer.sdp);
_peerConnection = pc;
return(answer);
}
public async Task <RTCSessionDescriptionInit> GotOffer(RTCSessionDescriptionInit offer)
{
_logger.LogDebug($"SDP offer received.");
_logger.LogTrace($"Offer SDP:\n{offer.sdp}");
var pc = new RTCPeerConnection();
if (_publicIPv4 != null)
{
var rtpPort = pc.GetRtpChannel().RTPPort;
var publicIPv4Candidate = new RTCIceCandidate(RTCIceProtocol.udp, _publicIPv4, (ushort)rtpPort, RTCIceCandidateType.host);
pc.addLocalIceCandidate(publicIPv4Candidate);
}
if (_publicIPv6 != null)
{
var rtpPort = pc.GetRtpChannel().RTPPort;
var publicIPv6Candidate = new RTCIceCandidate(RTCIceProtocol.udp, _publicIPv6, (ushort)rtpPort, RTCIceCandidateType.host);
pc.addLocalIceCandidate(publicIPv6Candidate);
}
MediaStreamTrack audioTrack = new MediaStreamTrack(SDPMediaTypesEnum.audio, false,
new List <SDPAudioVideoMediaFormat> {
new SDPAudioVideoMediaFormat(SDPWellKnownMediaFormatsEnum.PCMU)
}, MediaStreamStatusEnum.SendRecv);
pc.addTrack(audioTrack);
MediaStreamTrack videoTrack = new MediaStreamTrack(new VideoFormat(VideoCodecsEnum.VP8, VP8_PAYLOAD_ID), MediaStreamStatusEnum.SendRecv);
pc.addTrack(videoTrack);
pc.OnRtpPacketReceived += (IPEndPoint rep, SDPMediaTypesEnum media, RTPPacket rtpPkt) =>
{
pc.SendRtpRaw(media, rtpPkt.Payload, rtpPkt.Header.Timestamp, rtpPkt.Header.MarkerBit, rtpPkt.Header.PayloadType);
//_logger.LogDebug($"RTP {media} pkt received, SSRC {rtpPkt.Header.SyncSource}, SeqNum {rtpPkt.Header.SequenceNumber}.");
};
//peerConnection.OnReceiveReport += RtpSession_OnReceiveReport;
//peerConnection.OnSendReport += RtpSession_OnSendReport;
pc.OnTimeout += (mediaType) => _logger.LogWarning($"Timeout for {mediaType}.");
pc.onconnectionstatechange += (state) =>
{
_logger.LogDebug($"Peer connection state changed to {state}.");
if (state == RTCPeerConnectionState.failed)
{
pc.Close("ice failure");
}
};
var setResult = pc.setRemoteDescription(offer);
if (setResult == SetDescriptionResultEnum.OK)
{
var offerSdp = pc.createOffer(null);
await pc.setLocalDescription(offerSdp);
var answer = pc.createAnswer(null);
await pc.setLocalDescription(answer);
_logger.LogTrace($"Answer SDP:\n{answer.sdp}");
return(answer);
}
else
{
return(null);
}
}
/// <summary>
/// This is a javascript application.
/// </summary>
/// <param name="page">HTML document rendered by the web server which can now be enhanced.</param>
public Application(IApp page)
{
// https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection
// https://github.com/cjb/serverless-webrtc
// https://github.com/XSockets/WebRTC
// jsc when was the last time we tried p2p?
// var peer = new PeerConnection(iceServers, optional); where iceServers = null this is working without internet
// http://stackoverflow.com/questions/19675165/whether-stun-server-is-needed-within-lan-for-webrtc
//var peer = new PeerConnection(iceServers, optional);
// https://www.webrtc-experiment.com/docs/WebRTC-PeerConnection.html
// http://stackoverflow.com/questions/12848013/what-is-the-replacement-for-the-deprecated-peerconnection-api
// http://docs.webplatform.org/wiki/apis/webrtc/RTCPeerConnection
// http://w3schools.invisionzone.com/index.php?showtopic=46661
// http://www.html5rocks.com/en/tutorials/webrtc/basics/#toc-rtcpeerconnection
// IDL dictionary looks like C# PrimaryCnstructor concept does it not
////var d = new RTCSessionDescription(
//// new
////{
////}
////);
// 02000002 TestPeerConnection.Application
// script: error JSC1000: You tried to instance a class which seems to be marked as native.
// script: error JSC1000: type has no callable constructor: [ScriptCoreLib.JavaScript.DOM.RTCPeerConnection]
//Void.ctor()
// Uncaught ReferenceError: RTCPeerConnection is not defined
// wtf?
// {{ RTCPeerConnection = undefined }}
//new IHTMLPre { new { w.RTCPeerConnection } }.AttachToDocument();
// {{ webkitRTCPeerConnection = function RTCPeerConnection() { [native code] } }}
//new IHTMLPre { new { w.webkitRTCPeerConnection } }.AttachToDocument();
// wtf chrome? stop prefixing
var w = Native.window as dynamic;
Console.WriteLine(new { w.RTCPeerConnection });
w.RTCPeerConnection = w.webkitRTCPeerConnection;
// Uncaught TypeError: Failed to construct 'RTCPeerConnection': 1 argument required, but only 0 present.
// http://stackoverflow.com/questions/22470291/rtcdatachannels-readystate-is-not-open
// after Chrome 31, you can use SCTP based data channels.
// http://stackoverflow.com/questions/21585681/send-image-data-over-rtc-data-channel
// https://code.google.com/p/chromium/issues/detail?id=295771
// https://gist.github.com/shacharz/9661930
// http://chimera.labs.oreilly.com/books/1230000000545/ch18.html#_tracking_ice_gathering_and_connectivity_status
var peer = new RTCPeerConnection(
new { iceServers = new object[0] },
null
// https://groups.google.com/forum/#!topic/discuss-webrtc/y2A97iCByTU
//constraints: new {
// optional = new[]
// {
// new { RtpDataChannels = true }
// }
//}
);
// how the hell cann I connect two p2p?
// i see we need to do data
//peer.setLocalDescription
// https://groups.google.com/forum/#!topic/discuss-webrtc/zK_5yUqiqsE
// X:\jsc.svn\examples\javascript\xml\VBDisplayServerDebuggerPresence\VBDisplayServerDebuggerPresence\ApplicationWebService.vb
// https://code.google.com/p/webrtc/source/browse/trunk/samples/js/base/adapter.js
// http://www.webrtc.org/faq-recent-topics
// http://stackoverflow.com/questions/14134090/how-is-a-webrtc-peer-connection-established
peer.onicecandidate = new Action <RTCPeerConnectionIceEvent>(
(RTCPeerConnectionIceEvent e) =>
{
if (e.candidate != null)
{
new IHTMLPre {
"onicecandidate: " + new { e.candidate.candidate }
}.AttachToDocument();
peer.addIceCandidate(e.candidate,
new Action(
delegate
{
new IHTMLPre {
"addIceCandidate"
}.AttachToDocument();
}
));
}
}
);
// http://stackoverflow.com/questions/15484729/why-doesnt-onicecandidate-work
// http://www.skylinetechnologies.com/Blog/Article/48/Peer-to-Peer-Media-Streaming-with-WebRTC-and-SignalR.aspx
peer.createOffer(
new Action <RTCSessionDescription>(
(RTCSessionDescription x) =>
{
new IHTMLPre {
"after createOffer " + new { x.sdp }
}.AttachToDocument();
peer.setLocalDescription(x,
new Action(
delegate
{
// // send the offer to a server that can negotiate with a remote client
new IHTMLPre {
"after setLocalDescription "
}.AttachToDocument();
}
)
);
peer.setRemoteDescription(x,
new Action(
delegate
{
// // send the offer to a server that can negotiate with a remote client
new IHTMLPre {
"after setRemoteDescription "
}.AttachToDocument();
}
)
);
}
)
);
peer.createAnswer(
new Action <RTCSessionDescription>(
(RTCSessionDescription x) =>
{
new IHTMLPre {
"after createAnswer " + new { x.sdp }
}.AttachToDocument();
}
));
// https://groups.google.com/forum/#!topic/discuss-webrtc/wbcgYMrIii4
// https://groups.google.com/forum/#!msg/discuss-webrtc/wbcgYMrIii4/aZ12cENVTxEJ
// http://blog.printf.net/articles/2013/05/17/webrtc-without-a-signaling-server/
//peer.onconn
// https://github.com/cjb/serverless-webrtc/blob/master/js/serverless-webrtc.js
peer.ondatachannel = new Action <RTCDataChannelEvent>(
(RTCDataChannelEvent e) =>
{
//Console.WriteLine("ondatachannel");
new IHTMLPre {
"ondatachannel"
}.AttachToDocument();
var c = e.channel;
c.onmessage = new Action <MessageEvent>(
(MessageEvent ee) =>
{
new IHTMLPre {
new { ee.data }
}.AttachToDocument();
}
);
}
);
// jsc cant the idl generator understand optinal?
RTCDataChannel dc = peer.createDataChannel("label1", null);
// {{ id = 65535, label = label1, readyState = connecting }}
new IHTMLPre {
new { dc.id, dc.label, dc.readyState }
}.AttachToDocument();
new IHTMLButton {
"awaiting to open..."
}.AttachToDocument().With(
button =>
{
// !!! can our IDL compiler generate events and async at the same time?
dc.onopen = new Action <IEvent>(
async ee =>
{
button.innerText = "send";
while (true)
{
await button.async.onclick;
new IHTMLPre {
"send"
}.AttachToDocument();
// Failed to execute 'send' on 'RTCDataChannel': RTCDataChannel.readyState is not 'open'
dc.send("data to send");
}
}
);
}
);
//connection.createOffer
}
