/// <summary>
/// Hands the socket handle to the DTLS context and waits for the handshake to complete.
/// </summary>
/// <param name="rtpSocket">The RTP socket being used for the WebRTC session.</param>
private static int DoDtlsHandshake(WebRtcSession webRtcSession, Socket rtpSocket, out ProtectRtpPacket protectRtp, out ProtectRtpPacket protectRtcp)
{
logger.LogDebug("DoDtlsHandshake started.");
protectRtp = null;
protectRtcp = null;
if (!File.Exists(DTLS_CERTIFICATE_PATH))
{
throw new ApplicationException($"The DTLS certificate file could not be found at {DTLS_CERTIFICATE_PATH}.");
}
else if (!File.Exists(DTLS_KEY_PATH))
{
throw new ApplicationException($"The DTLS key file could not be found at {DTLS_KEY_PATH}.");
}
var dtls = new Dtls(DTLS_CERTIFICATE_PATH, DTLS_KEY_PATH);
webRtcSession.OnClose += (reason) => dtls.Shutdown();
int res = dtls.DoHandshake((ulong)rtpSocket.Handle);
logger.LogDebug("DtlsContext initialisation result=" + res);
if (dtls.GetState() == (int)DtlsState.OK)
{
logger.LogDebug("DTLS negotiation complete.");
var srtpContext = new Srtp(dtls, false);
protectRtp = srtpContext.ProtectRTP;
protectRtcp = srtpContext.ProtectRTCP;
}
return(res);
}
protected override void OnClose(CloseEventArgs e)
{
Server.RemoveClient(this);
Server.BroadcastState();
SrtpContext?.Dispose();
SrtpContext = null;
Dtls?.Dispose();
Dtls = null;
base.OnClose(e);
}
static void Main()
{
Console.WriteLine("WebRTC Server Sample Program");
Console.WriteLine("Press ctrl-c to exit.");
// Plumbing code to facilitate a graceful exit.
CancellationTokenSource exitCts = new CancellationTokenSource(); // Cancellation token to stop the SIP transport and RTP stream.
ManualResetEvent exitMre = new ManualResetEvent(false);
AddConsoleLogger();
// Initialise OpenSSL & libsrtp, saves a couple of seconds for the first client connection.
Console.WriteLine("Initialising OpenSSL and libsrtp...");
Dtls.InitialiseOpenSSL();
Srtp.InitialiseLibSrtp();
Task.Run(SendTestPattern);
// Start web socket.
Console.WriteLine("Starting web socket server...");
_webSocketServer = new WebSocketServer(IPAddress.Any, WEBSOCKET_PORT, true);
_webSocketServer.SslConfiguration.ServerCertificate = new System.Security.Cryptography.X509Certificates.X509Certificate2(WEBSOCKET_CERTIFICATE_PATH);
_webSocketServer.SslConfiguration.CheckCertificateRevocation = false;
//_webSocketServer.Log.Level = WebSocketSharp.LogLevel.Debug;
_webSocketServer.AddWebSocketService <SDPExchange>("/", (sdpExchanger) =>
{
sdpExchanger.WebSocketOpened += SendSDPOffer;
sdpExchanger.SDPAnswerReceived += SDPAnswerReceived;
});
_webSocketServer.Start();
Console.WriteLine($"Waiting for browser web socket connection to {_webSocketServer.Address}:{_webSocketServer.Port}...");
// Ctrl-c will gracefully exit the call at any point.
Console.CancelKeyPress += delegate(object sender, ConsoleCancelEventArgs e)
{
e.Cancel = true;
exitMre.Set();
};
// Wait for a signal saying the call failed, was cancelled with ctrl-c or completed.
exitMre.WaitOne();
}
static void Main()
{
Console.WriteLine("WebRTC Server Sample Program");
Console.WriteLine("Press ctrl-c to exit.");
// Plumbing code to facilitate a graceful exit.
CancellationTokenSource exitCts = new CancellationTokenSource(); // Cancellation token to stop the SIP transport and RTP stream.
ManualResetEvent exitMre = new ManualResetEvent(false);
AddConsoleLogger();
if (!File.Exists(MP4_FILE_PATH))
{
throw new ApplicationException($"The media file at does not exist at {MP4_FILE_PATH}.");
}
// Initialise OpenSSL & libsrtp, saves a couple of seconds for the first client connection.
Console.WriteLine("Initialising OpenSSL and libsrtp...");
Dtls.InitialiseOpenSSL();
Srtp.InitialiseLibSrtp();
// Initialise the Media Foundation library that will pull the samples from the mp4 file.
_mfSampleGrabber = new SIPSorceryMedia.MFSampleGrabber();
_mfSampleGrabber.OnClockStartEvent += OnClockStartEvent;
_mfSampleGrabber.OnVideoResolutionChangedEvent += OnVideoResolutionChangedEvent;
unsafe
{
_mfSampleGrabber.OnProcessSampleEvent += OnProcessSampleEvent;
}
Task.Run(() => _mfSampleGrabber.Run(MP4_FILE_PATH, true));
// Hook up event handlers to send the media samples to the network.
//InitMediaToWebRtcClients();
// Start web socket.
Console.WriteLine("Starting web socket server...");
_webSocketServer = new WebSocketServer(IPAddress.Any, WEBSOCKET_PORT, true);
_webSocketServer.SslConfiguration.ServerCertificate = new System.Security.Cryptography.X509Certificates.X509Certificate2(WEBSOCKET_CERTIFICATE_PATH);
_webSocketServer.SslConfiguration.CheckCertificateRevocation = false;
//_webSocketServer.Log.Level = WebSocketSharp.LogLevel.Debug;
_webSocketServer.AddWebSocketService <SDPExchange>("/", (sdpExchanger) =>
{
sdpExchanger.WebSocketOpened += SendSDPOffer;
sdpExchanger.SDPAnswerReceived += SDPAnswerReceived;
});
_webSocketServer.Start();
Console.WriteLine($"Waiting for browser web socket connection to {_webSocketServer.Address}:{_webSocketServer.Port}...");
// Ctrl-c will gracefully exit the call at any point.
Console.CancelKeyPress += delegate(object sender, ConsoleCancelEventArgs e)
{
e.Cancel = true;
exitMre.Set();
};
// Wait for a signal saying the call failed, was cancelled with ctrl-c or completed.
exitMre.WaitOne();
_mfSampleGrabber.StopAndExit();
_webSocketServer.Stop();
}
