public IEnumerator UnitySetUp()
{
WebRTC.WebRTC.Initialize();
RTCConfiguration config = default;
RTCIceCandidate candidate_ = null;
config.iceServers = new[] { new RTCIceServer {
urls = new[] { "stun:stun.l.google.com:19302" }
} };
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
peer1.OnIceCandidate = candidate => { candidate_ = candidate; };
MediaStream stream = WebRTC.Audio.CaptureStream();
peer1.AddTrack(stream.GetTracks().First());
RTCOfferOptions offerOptions = new RTCOfferOptions();
var op1 = peer1.CreateOffer(ref offerOptions);
yield return(op1);
m_DescOffer = op1.Desc;
var op2 = peer1.SetLocalDescription(ref m_DescOffer);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref m_DescOffer);
yield return(op3);
RTCAnswerOptions answerOptions = new RTCAnswerOptions();
var op4 = peer2.CreateAnswer(ref answerOptions);
yield return(op4);
m_DescAnswer = op4.Desc;
var op5 = peer2.SetLocalDescription(ref m_DescAnswer);
yield return(op5);
var op6 = peer1.SetRemoteDescription(ref m_DescAnswer);
yield return(op6);
yield return(new WaitUntil(() => candidate_ != null));
m_candidate = candidate_;
stream.Dispose();
peer1.Close();
peer2.Close();
m_Context = SynchronizationContext.Current;
signaling1 = CreateSignaling(m_SignalingType, m_Context);
signaling2 = CreateSignaling(m_SignalingType, m_Context);
}
/// <summary>
/// Start a "call" based on the current
/// media options.
/// Client only.
/// </summary>
/// <returns></returns>
public async Task StartCall()
{
// only called by client, so no need to verify identity.
if (this.PeerConnections.Count != 0)
{
throw new Exception("Peer connection already exists.");
}
this.PeerConnections.Add(this.LastRegisteredPeer, await this.BuildPeerConnection(this.MediaOpts));
var connectToPeer =
this.MediaOpts.SendAudio ||
this.MediaOpts.ReceiveAudio ||
this.MediaOpts.SendVideo ||
this.MediaOpts.ReceiveVideo;
if (connectToPeer)
{
var offerOptions = new RTCOfferOptions()
{
OfferToReceiveAudio = this.MediaOpts.ReceiveAudio,
OfferToReceiveVideo = this.MediaOpts.ReceiveVideo
};
// because this is the client, only one peer connection will exist.
var offer = await this.PeerConnections[this.LastRegisteredPeer].CreateOffer(offerOptions);
await this.PeerConnections[this.LastRegisteredPeer].SetLocalDescription(offer);
await this.SendOffer((RTCSessionDescription)offer);
}
}
/// <summary>
/// Creates a new WebRTC peer connection and send an SDP offer to the node DSS server.
/// </summary>
public IEnumerator Start()
{
var nodeDssClient = new HttpClient();
Debug.WriteLine($"node-dss starting receive task for server {_nodeDssServerUri}, our ID {_ourID} and their ID {_theirID}.");
RTCOfferOptions offerOptions = new RTCOfferOptions();
var createOfferOp = _pc.CreateOffer(ref offerOptions);
yield return(createOfferOp);
if (createOfferOp.IsError)
{
Debug.WriteLine($"Error creating local description on peer connection. {createOfferOp.Error}");
}
else
{
Debug.WriteLine($"Offer SDP: {createOfferOp.Desc.sdp}.");
var init = createOfferOp.Desc;
var setLocalOp = _pc.SetLocalDescription(ref init);
yield return(setLocalOp);
if (setLocalOp.IsError)
{
Debug.WriteLine($"Error setting local description on peer connection. {setLocalOp.Error}");
}
else
{
Debug.WriteLine("node-dss sending initial SDP offer to server.");
_ = Task.Run(() => ReceiveFromNSS(nodeDssClient, _pc));
}
}
}
IEnumerator SendOfferCoroutine(string connectionId, RTCPeerConnection pc)
{
RTCOfferOptions option = new RTCOfferOptions {
offerToReceiveAudio = true, offerToReceiveVideo = true
};
var offerOp = pc.CreateOffer(ref option);
yield return(offerOp);
if (offerOp.IsError)
{
Debug.LogError($"Network Error: {offerOp.Error.message}");
yield break;
}
if (pc.SignalingState != RTCSignalingState.Stable)
{
Debug.LogError($"peerConnection's signaling state is not stable. {pc.SignalingState}");
yield break;
}
var desc = offerOp.Desc;
var setLocalSdp = pc.SetLocalDescription(ref desc);
yield return(setLocalSdp);
if (setLocalSdp.IsError)
{
Debug.LogError($"Network Error: {setLocalSdp.Error.message}");
yield break;
}
_signaling.SendOffer(connectionId, desc);
}
public IEnumerator SetLocalDescriptionFailed()
{
var peer = new RTCPeerConnection();
var stream = new MediaStream();
var track = new AudioStreamTrack("audio");
var sender = peer.AddTrack(track, stream);
RTCOfferOptions options = default;
var op = peer.CreateOffer(ref options);
yield return(op);
Assert.True(op.IsDone);
Assert.False(op.IsError);
var desc = op.Desc;
// change sdp to cannot parse
desc.sdp = desc.sdp.Replace("m=audio", "m=audiable");
var op2 = peer.SetLocalDescription(ref desc);
yield return(op2);
Assert.True(op2.IsDone);
Assert.True(op2.IsError);
Assert.IsNotEmpty(op2.Error.message);
peer.RemoveTrack(sender);
track.Dispose();
stream.Dispose();
peer.Close();
peer.Dispose();
}
private RTCSessionDescriptionAsyncOperation StartClientOffer()
{
// Client caller code.
RTCOfferOptions options = default;
return(_peerConnection.CreateOffer(ref options));
}
public async Task StartCall()
{
if (this.peerConnection != null)
{
throw new Exception();
}
this.peerConnection = await this.buildPeerConnection(this.mediaOptions);
var connectToPeer =
this.mediaOptions.SendAudio ||
this.mediaOptions.ReceiveAudio ||
this.mediaOptions.SendVideo ||
this.mediaOptions.ReceiveVideo;
if (connectToPeer)
{
var offerOptions = new RTCOfferOptions()
{
OfferToReceiveAudio = this.mediaOptions.ReceiveAudio,
OfferToReceiveVideo = this.mediaOptions.ReceiveVideo
};
var offer = await this.peerConnection.CreateOffer(offerOptions);
await this.peerConnection.SetLocalDescription(offer);
await this.signaller.SendOffer((RTCSessionDescription)offer);
}
}
public IEnumerator SetLocalDescription()
{
var peer = new RTCPeerConnection();
RTCOfferOptions options = default;
var op = peer.CreateOffer(ref options);
yield return(op);
Assert.True(op.IsDone);
Assert.False(op.IsError);
var desc = op.Desc;
var op2 = peer.SetLocalDescription(ref desc);
yield return(op2);
Assert.True(op2.IsDone);
Assert.False(op2.IsError);
var desc2 = peer.LocalDescription;
Assert.AreEqual(desc.sdp, desc2.sdp);
Assert.AreEqual(desc.type, desc2.type);
peer.Close();
peer.Dispose();
}
public Task <RTCSessionDescriptionInit> CreateOffer(RTCOfferOptions options)
{
var tcs = new TaskCompletionSource <RTCSessionDescriptionInit>();
((Webrtc.PeerConnection)NativeObject).CreateOffer(
new SdpObserverProxy(tcs),
new Webrtc.MediaConstraints() /*NativeDefaultMediaConstraints*/);
return(tcs.Task);
}
public IEnumerator CurrentDirection()
{
var config = GetConfiguration();
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
var audioTrack = new AudioStreamTrack("audio");
var transceiver1 = peer1.AddTransceiver(TrackKind.Audio);
transceiver1.Direction = RTCRtpTransceiverDirection.RecvOnly;
Assert.IsNull(transceiver1.CurrentDirection);
RTCOfferOptions options1 = new RTCOfferOptions {
offerToReceiveAudio = true
};
RTCAnswerOptions options2 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var desc = op1.Desc;
var op2 = peer1.SetLocalDescription(ref desc);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref desc);
yield return(op3);
var transceiver2 = peer2.GetTransceivers().First(x => x.Receiver.Track.Kind == TrackKind.Audio);
Assert.True(transceiver2.Sender.ReplaceTrack(audioTrack));
transceiver2.Direction = RTCRtpTransceiverDirection.SendOnly;
var op4 = peer2.CreateAnswer(ref options2);
yield return(op4);
desc = op4.Desc;
var op5 = peer2.SetLocalDescription(ref desc);
yield return(op5);
var op6 = peer1.SetRemoteDescription(ref desc);
yield return(op6);
Assert.AreEqual(transceiver1.CurrentDirection, RTCRtpTransceiverDirection.RecvOnly);
Assert.AreEqual(transceiver2.CurrentDirection, RTCRtpTransceiverDirection.SendOnly);
audioTrack.Dispose();
peer1.Close();
peer2.Close();
peer1.Dispose();
peer2.Dispose();
}
public async Task <RTCSessionDescriptionInit> CreateOffer(RTCOfferOptions options)
{
var jsObjectRef = await JsRuntime.CallJsMethodAsync <JsObjectRef>(NativeObject,
"createOffer", options);
var descriptor = JsRuntime.GetJsPropertyValue <RTCSessionDescriptionInit>(jsObjectRef, null);
JsRuntime.DeleteJsObjectRef(jsObjectRef.JsObjectRefId);
return(descriptor);
}
/// <summary>
/// Attempts to place a new outgoing call.
/// </summary>
/// <param name="sipCallDescriptor">A call descriptor containing the information about how
/// and where to place the call.</param>
/// <param name="mediaSession">The media session used for this call</param>
public async Task InitiateCallAsync(SIPCallDescriptor sipCallDescriptor, IMediaSession mediaSession)
{
m_cts = new CancellationTokenSource();
m_uac = new SIPClientUserAgent(m_transport);
m_uac.CallTrying += ClientCallTryingHandler;
m_uac.CallRinging += ClientCallRingingHandler;
m_uac.CallAnswered += ClientCallAnsweredHandler;
m_uac.CallFailed += ClientCallFailedHandler;
// Can be DNS lookups involved in getting the call destination.
SIPEndPoint serverEndPoint = await Task.Run <SIPEndPoint>(() => { return(m_uac.GetCallDestination(sipCallDescriptor)); }).ConfigureAwait(false);
if (serverEndPoint != null)
{
MediaSession = mediaSession;
MediaSession.OnRtpEvent += OnRemoteRtpEvent;
//MediaSession.OnRtpClosed += (reason) => Hangup();
MediaSession.OnRtpClosed += (reason) =>
{
if (!MediaSession.IsClosed)
{
logger.LogWarning($"RTP channel was closed with reason {reason}.");
}
};
RTCOfferOptions offerOptions = new RTCOfferOptions {
RemoteSignallingAddress = serverEndPoint.Address
};
var sdp = await mediaSession.createOffer(offerOptions).ConfigureAwait(false);
mediaSession.setLocalDescription(new RTCSessionDescription {
sdp = sdp, type = RTCSdpType.offer
});
if (mediaSession.localDescription == null)
{
ClientCallFailed?.Invoke(m_uac, $"Could not create a local SDP offer.");
CallEnded();
}
else
{
sipCallDescriptor.Content = mediaSession.localDescription.sdp.ToString();
// This initiates the call but does not wait for an answer.
m_uac.Call(sipCallDescriptor);
}
}
else
{
ClientCallFailed?.Invoke(m_uac, $"Could not resolve destination when placing call to {sipCallDescriptor.Uri}.");
CallEnded();
}
}
private static IEnumerator SignalingPeers(RTCPeerConnection offerPc, RTCPeerConnection answerPc)
{
offerPc.OnIceCandidate = candidate => answerPc.AddIceCandidate(ref candidate);
answerPc.OnIceCandidate = candidate => offerPc.AddIceCandidate(ref candidate);
var offerOption = new RTCOfferOptions {offerToReceiveVideo = true};
var answerOption = new RTCAnswerOptions {iceRestart = false};
var pc1CreateOffer = offerPc.CreateOffer(ref offerOption);
yield return pc1CreateOffer;
Assert.False(pc1CreateOffer.IsError);
var offerDesc = pc1CreateOffer.Desc;
var pc1SetLocalDescription = offerPc.SetLocalDescription(ref offerDesc);
yield return pc1SetLocalDescription;
Assert.False(pc1SetLocalDescription.IsError);
var pc2SetRemoteDescription = answerPc.SetRemoteDescription(ref offerDesc);
yield return pc2SetRemoteDescription;
Assert.False(pc2SetRemoteDescription.IsError);
var pc2CreateAnswer = answerPc.CreateAnswer(ref answerOption);
yield return pc2CreateAnswer;
Assert.False(pc2CreateAnswer.IsError);
var answerDesc = pc2CreateAnswer.Desc;
var pc2SetLocalDescription = answerPc.SetLocalDescription(ref answerDesc);
yield return pc2SetLocalDescription;
Assert.False(pc2SetLocalDescription.IsError);
var pc1SetRemoteDescription = offerPc.SetRemoteDescription(ref answerDesc);
yield return pc1SetRemoteDescription;
Assert.False(pc1SetRemoteDescription.IsError);
var waitConnectOfferPc = new WaitUntilWithTimeout(() =>
offerPc.IceConnectionState == RTCIceConnectionState.Connected ||
offerPc.IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return waitConnectOfferPc;
Assert.True(waitConnectOfferPc.IsCompleted);
var waitConnectAnswerPc = new WaitUntilWithTimeout(() =>
answerPc.IceConnectionState == RTCIceConnectionState.Connected ||
answerPc.IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return waitConnectAnswerPc;
Assert.True(waitConnectAnswerPc.IsCompleted);
var checkSenders = new WaitUntilWithTimeout(() => offerPc.GetSenders().Any(), 5000);
yield return checkSenders;
Assert.True(checkSenders.IsCompleted);
var checkReceivers = new WaitUntilWithTimeout(() => answerPc.GetReceivers().Any(), 5000);
yield return checkReceivers;
Assert.True(checkReceivers.IsCompleted);
}
public async Task <RTCSessionDescriptionInit> CreateOffer(RTCOfferOptions options)
{
var tcs = new TaskCompletionSource <RTCSessionDescriptionInit>();
((Webrtc.PeerConnection)NativeObject).CreateOffer(
new SdpObserverProxy(tcs),
new Webrtc.MediaConstraints() /*NativeDefaultMediaConstraints*/);
var offer = await tcs.Task;
// Android DOES NOT expose 'Type'!!! I set it manually here.
offer.Type = RTCSdpType.Offer;
return(offer);
}
public IEnumerator PeerConnection_CreateOffer()
{
var config = GetConfiguration();
var peer = new RTCPeerConnection(ref config);
RTCOfferOptions options = default;
var op = peer.CreateOffer(ref options);
yield return(op);
Assert.True(op.isDone);
Assert.False(op.isError);
peer.Close();
}
public Task <RTCSessionDescriptionInit> CreateOffer(RTCOfferOptions options)
{
var tcs = new TaskCompletionSource <RTCSessionDescriptionInit>();
((Webrtc.RTCPeerConnection)NativeObject).OfferForConstraints(
new Webrtc.RTCMediaConstraints(null, null),////NativeDefaultRTCMediaConstraints,
(nativeSessionDescription, nsError) =>
{
if (nsError != null)
{
tcs.SetException(new Exception($"{nsError.LocalizedDescription}"));
}
tcs.SetResult(nativeSessionDescription.FromNative());
});
return(tcs.Task);
}
IEnumerator OnNegotiationNeeded(ISignaling signaling, string connectionId, bool isOffer)
{
if (!isOffer)
{
yield break;
}
if (!m_mapConnectionIdAndPeer.TryGetValue(connectionId, out var pc))
{
Debug.LogError($"connectionId: {connectionId}, did not created peerConnection");
yield break;
}
RTCOfferOptions option = new RTCOfferOptions
{
offerToReceiveAudio = true,
offerToReceiveVideo = true
};
var offerOp = pc.CreateOffer(ref option);
yield return(offerOp);
if (offerOp.IsError)
{
Debug.LogError($"Network Error: {offerOp.Error.message}");
yield break;
}
if (pc.SignalingState != RTCSignalingState.Stable)
{
Debug.LogError($"peerConnection's signaling state is not stable.");
yield break;
}
var desc = offerOp.Desc;
var setLocalSdp = pc.SetLocalDescription(ref desc);
yield return(setLocalSdp);
if (setLocalSdp.IsError)
{
Debug.LogError($"Network Error: {setLocalSdp.Error.message}");
yield break;
}
signaling.SendOffer(connectionId, desc);
}
public IEnumerator SetRemoteDescription()
{
var config = GetConfiguration();
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
var conf = new RTCDataChannelInit(true);
var channel1 = peer1.CreateDataChannel("data", ref conf);
RTCOfferOptions options1 = default;
RTCAnswerOptions options2 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var desc = op1.Desc;
var op2 = peer1.SetLocalDescription(ref desc);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref desc);
yield return(op3);
var op4 = peer2.CreateAnswer(ref options2);
yield return(op4);
desc = op4.Desc;
var op5 = peer2.SetLocalDescription(ref desc);
yield return(op5);
var op6 = peer1.SetRemoteDescription(ref desc);
yield return(op6);
var desc2 = peer1.RemoteDescription;
Assert.AreEqual(desc.sdp, desc2.sdp);
Assert.AreEqual(desc.type, desc2.type);
channel1.Dispose();
peer1.Close();
peer2.Close();
peer1.Dispose();
peer2.Dispose();
}
public async Task <ICallInfo> PlaceCallAsync(CallConfiguration config)
{
Debug.Assert(_peerId == -1);
if (PeerConnection != null)
{
Debug.WriteLine("[Error] We only support connection to one peer at a time.");
return(null);
}
if (CreatePeerConnection())
{
string selectedAudioCodecName = (string)_localSettings.Values["SelectedAudioCodecName"];
string selectedVideoCodecName = (string)_localSettings.Values["SelectedVideoCodecName"];
_peerId = PeerId;
var offerOptions = new RTCOfferOptions();
offerOptions.OfferToReceiveAudio = true;
offerOptions.OfferToReceiveVideo = true;
IRTCSessionDescription offer = await PeerConnection.CreateOffer(offerOptions);
// Alter sdp to force usage of selected codecs
string modifiedSdp = offer.Sdp;
SdpUtils.SelectCodec(ref modifiedSdp, selectedAudioCodecName, "audio");
SdpUtils.SelectCodec(ref modifiedSdp, selectedVideoCodecName, "video");
RTCSessionDescriptionInit sdpInit = new RTCSessionDescriptionInit();
sdpInit.Sdp = modifiedSdp;
sdpInit.Type = offer.SdpType;
var modifiedOffer = new RTCSessionDescription(sdpInit);
await PeerConnection.SetLocalDescription(modifiedOffer);
Debug.WriteLine($"Sending offer: {modifiedOffer.Sdp}");
string jsonString = SdpToJsonString(modifiedOffer);
CallInfo callInfo = new CallInfo();
callInfo.SetCall(new Call());
callInfo.SetSdp(modifiedSdp);
callInfo.SetJsonString(jsonString);
OnSendMessageToRemotePeer.Invoke(this, jsonString);
return(callInfo);
}
return(null);
}
public IEnumerator PeerConnection_SetRemoteDescription()
{
RTCConfiguration config = default;
config.iceServers = new[] { new RTCIceServer {
urls = new[] { "stun:stun.l.google.com:19302" }
} };
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
RTCDataChannel channel1 = null;
var conf = new RTCDataChannelInit(true);
channel1 = peer1.CreateDataChannel("data", ref conf);
RTCOfferOptions options1 = default;
RTCAnswerOptions options2 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var op2 = peer1.SetLocalDescription(ref op1.desc);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref op1.desc);
yield return(op3);
var op4 = peer2.CreateAnswer(ref options2);
yield return(op4);
var op5 = peer2.SetLocalDescription(ref op4.desc);
yield return(op5);
var op6 = peer1.SetRemoteDescription(ref op4.desc);
yield return(op6);
channel1.Dispose();
peer1.Dispose();
peer2.Dispose();
}
public IEnumerator PeerConnection_SetLocalDescription()
{
var peer = new RTCPeerConnection();
RTCOfferOptions options = default;
var op = peer.CreateOffer(ref options);
yield return(op);
Assert.True(op.isDone);
Assert.False(op.isError);
var op2 = peer.SetLocalDescription(ref op.desc);
yield return(op2);
Assert.True(op2.isDone);
Assert.False(op2.isError);
peer.Close();
}
public async Task <string> GenerateClientOffer()
{
Logger.Debug("PeerChannel", "GenerateClientOffer");
if (Conn == null)
{
Logger.Debug("PeerChannel", "should initialize beforehand");
return(string.Empty);
}
Conn.AddTransceiver("audio");
Conn.AddTransceiver("video");
var opts = new RTCOfferOptions();
var capabilities = await Conn.CreateOffer(opts);
return(capabilities.Sdp);
}
public Task <SDP> createOffer(RTCOfferOptions options)
{
SDP offerSdp = new SDP(IPAddress.Loopback);
offerSdp.SessionId = Crypto.GetRandomInt(5).ToString();
offerSdp.Connection = new SDPConnectionInformation(IPAddress.Loopback);
SDPMediaAnnouncement audioAnnouncement = new SDPMediaAnnouncement(
SDPMediaTypesEnum.audio,
1234,
new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.PCMU)
});
audioAnnouncement.Transport = RTP_MEDIA_PROFILE;
offerSdp.Media.Add(audioAnnouncement);
return(Task.FromResult(offerSdp));
}
public IEnumerator SetRemoteDescriptionFailed()
{
var config = GetConfiguration();
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
var stream = new MediaStream();
var track = new AudioStreamTrack("audio");
var sender = peer1.AddTrack(track, stream);
RTCOfferOptions options1 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var desc = op1.Desc;
var op2 = peer1.SetLocalDescription(ref desc);
yield return(op2);
// change sdp to cannot parse
desc.sdp = desc.sdp.Replace("m=audio", "m=audiable");
var op3 = peer2.SetRemoteDescription(ref desc);
yield return(op3);
Assert.True(op3.IsDone);
Assert.True(op3.IsError);
Assert.IsNotEmpty(op3.Error.message);
peer1.RemoveTrack(sender);
track.Dispose();
stream.Dispose();
peer1.Close();
peer2.Close();
peer1.Dispose();
peer2.Dispose();
}
public IEnumerator CreateAnswer()
{
var config = GetConfiguration();
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
var conf = new RTCDataChannelInit(true);
peer1.CreateDataChannel("data", ref conf);
RTCOfferOptions options1 = default;
RTCAnswerOptions options2 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var desc = op1.Desc;
var op2 = peer1.SetLocalDescription(ref desc);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref desc);
yield return(op3);
var op4 = peer2.CreateAnswer(ref options2);
yield return(op4);
Assert.True(op4.IsDone);
Assert.False(op4.IsError);
peer1.Close();
peer2.Close();
peer1.Dispose();
peer2.Dispose();
}
/// <summary>
/// Answers the call request contained in the user agent server parameter. Note the
/// <see cref="AcceptCall(SIPRequest)"/> method should be used to create the user agent server.
/// Any existing call will be hungup.
/// </summary>
/// <param name="uas">The user agent server holding the pending call to answer.</param>
/// <param name="mediaSession">The media session used for this call</param>
/// <param name="customHeaders">Custom SIP-Headers to use in Answer.</param>
public async Task Answer(SIPServerUserAgent uas, IMediaSession mediaSession, string[] customHeaders)
{
// This call is now taking over any existing call.
if (IsCallActive)
{
Hangup();
}
else if (uas.IsCancelled)
{
logger.LogDebug("The incoming call has been cancelled.");
mediaSession?.Close("call cancelled");
}
else
{
m_cts = new CancellationTokenSource();
var sipRequest = uas.ClientTransaction.TransactionRequest;
MediaSession = mediaSession;
MediaSession.OnRtpEvent += OnRemoteRtpEvent;
//MediaSession.OnRtpClosed += (reason) => Hangup();
MediaSession.OnRtpClosed += (reason) =>
{
if (!MediaSession.IsClosed)
{
logger.LogWarning($"RTP channel was closed with reason {reason}.");
}
};
string sdp = null;
if (!String.IsNullOrEmpty(sipRequest.Body))
{
// The SDP offer was included in the INVITE request.
SDP remoteSdp = SDP.ParseSDPDescription(sipRequest.Body);
MediaSession.setRemoteDescription(new RTCSessionDescription {
sdp = remoteSdp, type = RTCSdpType.offer
});
var sdpAnswer = await MediaSession.createAnswer(null).ConfigureAwait(false);
if (sdpAnswer == null)
{
logger.LogWarning($"Could not generate an SDP answer.");
m_uas.Reject(SIPResponseStatusCodesEnum.NotAcceptable, null);
return;
}
else
{
MediaSession.setLocalDescription(new RTCSessionDescription {
sdp = sdpAnswer, type = RTCSdpType.answer
});
sdp = sdpAnswer.ToString();
}
}
else
{
// No SDP offer was included in the INVITE request need to wait for the ACK.
RTCOfferOptions offerOptions = new RTCOfferOptions {
RemoteSignallingAddress = sipRequest.RemoteSIPEndPoint.GetIPEndPoint().Address
};
var sdpOffer = await MediaSession.createOffer(offerOptions).ConfigureAwait(false);
if (sdpOffer == null)
{
// This shouldn't occur unless we're unable to create an audio/video track.
logger.LogWarning($"Could not generate an SDP answer.");
m_uas.Reject(SIPResponseStatusCodesEnum.NotAcceptable, null);
return;
}
else
{
MediaSession.setLocalDescription(new RTCSessionDescription {
sdp = sdpOffer, type = RTCSdpType.offer
});
sdp = sdpOffer.ToString();
}
}
m_uas = uas;
// In cases where the initial INVITE did not contain an SDP offer the action sequence is:
// - INVITE with no SDP offer received,
// - Reply with OK and an SDP offer,
// - Wait for ACK with SDP answer.
TaskCompletionSource <SIPDialogue> dialogueCreatedTcs = new TaskCompletionSource <SIPDialogue>(TaskCreationOptions.RunContinuationsAsynchronously);
m_uas.OnDialogueCreated += (dialogue) => dialogueCreatedTcs.TrySetResult(dialogue);
m_uas.Answer(m_sdpContentType, sdp, null, SIPDialogueTransferModesEnum.Default, customHeaders);
await Task.WhenAny(dialogueCreatedTcs.Task, Task.Delay(WAIT_DIALOG_TIMEOUT)).ConfigureAwait(false);
if (Dialogue != null)
{
if (MediaSession.remoteDescription == null || MediaSession.remoteDescription.sdp == null)
{
// If the initial INVITE did not contain an offer then the remote description will not yet be set.
var remoteSDP = SDP.ParseSDPDescription(Dialogue.RemoteSDP);
MediaSession.setRemoteDescription(new RTCSessionDescription {
sdp = remoteSDP, type = RTCSdpType.answer
});
}
Dialogue.DialogueState = SIPDialogueStateEnum.Confirmed;
await MediaSession.Start().ConfigureAwait(false);
}
else
{
logger.LogWarning("The attempt to answer a call failed as the dialog was not created. The likely cause is the ACK not being received in time.");
MediaSession.Close("dialog creation failed");
Hangup();
}
}
}
public IEnumerator DataChannel_EventsAreSentToOther()
{
RTCConfiguration config = default;
config.iceServers = new RTCIceServer[]
{
new RTCIceServer
{
urls = new string[] { "stun:stun.l.google.com:19302" }
}
};
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
RTCDataChannel channel1 = null, channel2 = null;
peer1.OnIceCandidate = new DelegateOnIceCandidate(candidate => { peer2.AddIceCandidate(ref candidate); });
peer2.OnIceCandidate = new DelegateOnIceCandidate(candidate => { peer1.AddIceCandidate(ref candidate); });
peer2.OnDataChannel = new DelegateOnDataChannel(channel => { channel2 = channel; });
var conf = new RTCDataChannelInit(true);
channel1 = peer1.CreateDataChannel("data", ref conf);
RTCOfferOptions options1 = default;
RTCAnswerOptions options2 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var op2 = peer1.SetLocalDescription(ref op1.desc);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref op1.desc);
yield return(op3);
var op4 = peer2.CreateAnswer(ref options2);
yield return(op4);
var op5 = peer2.SetLocalDescription(ref op4.desc);
yield return(op5);
var op6 = peer1.SetRemoteDescription(ref op4.desc);
yield return(op6);
yield return(new WaitUntil(() => peer1.IceConnectionState == RTCIceConnectionState.Connected || peer1.IceConnectionState == RTCIceConnectionState.Completed));
yield return(new WaitUntil(() => peer2.IceConnectionState == RTCIceConnectionState.Connected || peer2.IceConnectionState == RTCIceConnectionState.Completed));
yield return(new WaitUntil(() => channel2 != null));
Assert.AreEqual(channel1.Label, channel2.Label);
Assert.AreEqual(channel1.Id, channel2.Id);
string message1 = "hello";
string message2 = null;
channel2.OnMessage = new DelegateOnMessage(bytes => { message2 = System.Text.Encoding.UTF8.GetString(bytes); });
channel1.Send(message1);
yield return(new WaitUntil(() => !string.IsNullOrEmpty(message2)));
Assert.AreEqual(message1, message2);
byte[] message3 = { 1, 2, 3 };
byte[] message4 = null;
channel2.OnMessage = new DelegateOnMessage(bytes => { message4 = bytes; });
channel1.Send(message3);
yield return(new WaitUntil(() => message4 != null));
Assert.AreEqual(message3, message4);
peer1.Close();
peer2.Close();
}
IEnumerator Start()
{
RTCConfiguration config = default;
config.iceServers = new[]
{
new RTCIceServer {
urls = new[] { "stun:stun.l.google.com:19302" }
}
};
peers[0] = new RTCPeerConnection(ref config);
peers[1] = new RTCPeerConnection(ref config);
dataChannels[peers[0]] = new List <RTCDataChannel>();
dataChannels[peers[1]] = new List <RTCDataChannel>();
RTCDataChannel channel = peers[0].CreateDataChannel("data");
dataChannels[peers[0]].Add(channel);
peers[0].OnIceCandidate = candidate =>
{
Assert.NotNull(candidate);
Assert.NotNull(candidate.Candidate);
peers[1].AddIceCandidate(candidate);
};
peers[1].OnIceCandidate = candidate =>
{
Assert.NotNull(candidate);
Assert.NotNull(candidate.Candidate);
peers[0].AddIceCandidate(candidate);
};
peers[1].OnTrack = e =>
{
Assert.NotNull(e);
Assert.NotNull(e.Track);
Assert.NotNull(e.Receiver);
Assert.NotNull(e.Transceiver);
peers[1].AddTrack(e.Track);
};
peers[0].OnDataChannel = e =>
{
if (peers[0].ConnectionState == RTCPeerConnectionState.Connected)
{
dataChannels[peers[0]].Add(e);
}
};
peers[1].OnDataChannel = e =>
{
if (peers[1].ConnectionState == RTCPeerConnectionState.Connected)
{
dataChannels[peers[1]].Add(e);
}
};
if (m_stream != null)
{
foreach (var track in m_stream.GetTracks())
{
peers[0].AddTrack(track, m_stream);
}
}
RTCOfferOptions options1 = default;
RTCAnswerOptions options2 = default;
var op1 = peers[0].CreateOffer(ref options1);
yield return(op1);
Assert.False(op1.IsError);
var desc = op1.Desc;
var op2 = peers[0].SetLocalDescription(ref desc);
yield return(op2);
Assert.False(op2.IsError);
desc.sdp = ReplaceOfferSdpForHardwareEncodeTest(desc.sdp);
var op3 = peers[1].SetRemoteDescription(ref desc);
yield return(op3);
Assert.False(op3.IsError);
var op4 = peers[1].CreateAnswer(ref options2);
yield return(op4);
Assert.False(op4.IsError);
desc = op4.Desc;
var op5 = peers[1].SetLocalDescription(ref desc);
yield return(op5);
Assert.False(op5.IsError);
desc.sdp = ReplaceAnswerSdpForHardwareEncodeTest(desc.sdp);
var op6 = peers[0].SetRemoteDescription(ref desc);
yield return(op6);
Assert.False(op6.IsError);
var op7 = new WaitUntilWithTimeout(() =>
peers[0].IceConnectionState == RTCIceConnectionState.Connected ||
peers[0].IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return(op7);
Assert.True(op7.IsCompleted);
var op8 = new WaitUntilWithTimeout(() =>
peers[1].IceConnectionState == RTCIceConnectionState.Connected ||
peers[1].IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return(op8);
Assert.True(op8.IsCompleted);
if (m_stream != null)
{
var op9 = new WaitUntilWithTimeout(() => GetPeerSenders(0).Any(), 5000);
yield return(op9);
Assert.True(op9.IsCompleted);
}
IsTestFinished = true;
}
public IEnumerator EventsAreSentToOther()
{
RTCConfiguration config = default;
config.iceServers = new[] { new RTCIceServer {
urls = new[] { "stun:stun.l.google.com:19302" }
} };
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
RTCDataChannel channel2 = null;
peer1.OnIceCandidate = candidate => { peer2.AddIceCandidate(candidate); };
peer2.OnIceCandidate = candidate => { peer1.AddIceCandidate(candidate); };
peer2.OnDataChannel = channel => { channel2 = channel; };
var channel1 = peer1.CreateDataChannel("data");
bool channel1Opened = false;
bool channel1Closed = false;
channel1.OnOpen = () => { channel1Opened = true; };
channel1.OnClose = () => { channel1Closed = true; };
RTCOfferOptions options1 = default;
RTCAnswerOptions options2 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var desc = op1.Desc;
var op2 = peer1.SetLocalDescription(ref desc);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref desc);
yield return(op3);
var op4 = peer2.CreateAnswer(ref options2);
yield return(op4);
desc = op4.Desc;
var op5 = peer2.SetLocalDescription(ref desc);
yield return(op5);
var op6 = peer1.SetRemoteDescription(ref desc);
yield return(op6);
var op7 = new WaitUntilWithTimeout(
() => peer1.IceConnectionState == RTCIceConnectionState.Connected ||
peer1.IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return(op7);
Assert.True(op7.IsCompleted);
var op8 = new WaitUntilWithTimeout(
() => peer2.IceConnectionState == RTCIceConnectionState.Connected ||
peer2.IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return(op8);
Assert.True(op8.IsCompleted);
var op9 = new WaitUntilWithTimeout(() => channel2 != null, 5000);
yield return(op9);
Assert.True(op9.IsCompleted);
Assert.True(channel1Opened);
Assert.AreEqual(channel1.Label, channel2.Label);
Assert.AreEqual(channel1.Id, channel2.Id);
const string message1 = "hello";
string message2 = null;
channel2.OnMessage = bytes => { message2 = System.Text.Encoding.UTF8.GetString(bytes); };
channel1.Send(message1);
var op10 = new WaitUntilWithTimeout(() => !string.IsNullOrEmpty(message2), 5000);
yield return(op10);
Assert.True(op10.IsCompleted);
Assert.AreEqual(message1, message2);
byte[] message3 = { 1, 2, 3 };
byte[] message4 = null;
channel2.OnMessage = bytes => { message4 = bytes; };
channel1.Send(message3);
var op11 = new WaitUntilWithTimeout(() => message4 != null, 5000);
yield return(op11);
Assert.True(op11.IsCompleted);
Assert.AreEqual(message3, message4);
channel1.Close();
var op12 = new WaitUntilWithTimeout(() => channel1Closed, 5000);
yield return(op12);
Assert.True(op12.IsCompleted);
channel2.Close();
peer1.Close();
peer2.Close();
}
public IEnumerator IceConnectionStateChange()
{
RTCConfiguration config = default;
config.iceServers = new[] { new RTCIceServer {
urls = new[] { "stun:stun.l.google.com:19302" }
} };
var peer1 = new RTCPeerConnection(ref config);
var peer2 = new RTCPeerConnection(ref config);
peer1.OnIceCandidate = candidate => { peer2.AddIceCandidate(ref candidate); };
peer2.OnIceCandidate = candidate => { peer1.AddIceCandidate(ref candidate); };
MediaStream stream = Audio.CaptureStream();
peer1.AddTrack(stream.GetTracks().First());
RTCOfferOptions options1 = default;
RTCAnswerOptions options2 = default;
var op1 = peer1.CreateOffer(ref options1);
yield return(op1);
var desc = op1.Desc;
var op2 = peer1.SetLocalDescription(ref desc);
yield return(op2);
var op3 = peer2.SetRemoteDescription(ref desc);
yield return(op3);
var op4 = peer2.CreateAnswer(ref options2);
yield return(op4);
desc = op4.Desc;
var op5 = peer2.SetLocalDescription(ref desc);
yield return(op5);
var op6 = peer1.SetRemoteDescription(ref desc);
yield return(op6);
var op7 = new WaitUntilWithTimeout(
() => peer1.IceConnectionState == RTCIceConnectionState.Connected ||
peer1.IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return(op7);
Assert.True(op7.IsCompleted);
var op8 = new WaitUntilWithTimeout(
() => peer2.IceConnectionState == RTCIceConnectionState.Connected ||
peer2.IceConnectionState == RTCIceConnectionState.Completed, 5000);
yield return(op8);
Assert.True(op8.IsCompleted);
stream.Dispose();
peer1.Close();
peer2.Close();
}