public string Discover(int attempts = 3)
{
var packet = new DiscoveryPacket();
var buffer = new byte[1024];
int bytesrecvd = 0;
for (var i = 1; i <= attempts && bytesrecvd == 0; i++)
{
try
{
Send(packet);
bytesrecvd = Receive(buffer);
}
catch (SocketException e)
{
if (e.SocketErrorCode != SocketError.TimedOut)
{
throw e;
}
if (i == attempts)
{
throw new TimeoutException($"Discovery timed out after {i} attempts.");
}
}
}
var endpoint = ParseLocationData(buffer, bytesrecvd);
return(endpoint);
}
void Send(DiscoveryPacket packet)
{
var ssdpEndpoint = new IPEndPoint(IPAddress.Parse(ssdpMcastAddr), ssdpPort);
SendTo(packet.ToByteArray(), 0, packet.Length, SocketFlags.None, ssdpEndpoint);
}
