public IObservable <IUdpIceCandidate> GetUdpIceCandidates()
{
if (!NetworkInterface.GetIsNetworkAvailable())
{
throw new InvalidOperationException("Cannot obtain the server reflexive UDP ICE candidate since the network interface has no network available.");
}
return(Observable.Merge(new IObservable <IUdpIceCandidate>[] { Observable.Return(FindLocalHostUdpIceCandidate()) }
.Concat(IceServers.SelectMany(iceServer =>
{
IStunIceServer stunIceServer;
if (StunIceServer.TryCreate(iceServer, out stunIceServer))
{
return new[] { FindServerReflexiveUdpIceCandidate(stunIceServer).ToObservable() };
}
ITurnIceServer turnIceServer;
if (TurnIceServer.TryCreate(iceServer, out turnIceServer))
{
return new IObservable <IUdpIceCandidate>[]
{
FindServerReflexiveUdpIceCandidate(turnIceServer).ToObservable(),
FindRelayUdpIceCandidate(turnIceServer).ToObservable()
};
}
return Enumerable.Empty <IObservable <IUdpIceCandidate> >();
}))));
}
public static bool TryCreate(Uri url, out IStunIceServer stunIceServer)
{
try
{
stunIceServer = new StunIceServer(url);
}
catch (Exception)
{
stunIceServer = null;
return false;
}
return true;
}
public static bool TryCreate(Uri url, out IStunIceServer stunIceServer)
{
try
{
stunIceServer = new StunIceServer(url);
}
catch (Exception)
{
stunIceServer = null;
return(false);
}
return(true);
}