protected override void Discover(UdpClient client, CancellationToken cancelationToken)
{
NextSearch = DateTime.UtcNow.AddSeconds(1);
var searchEndpoint = new IPEndPoint(
WellKnownConstants.IPv4MulticastAddress
/*IPAddress.Broadcast*/
, 1900);
foreach (var serviceType in ServiceTypes)
{
var datax = DiscoverDeviceMessage.Encode(serviceType);
var data = Encoding.ASCII.GetBytes(datax);
// UDP is unreliable, so send 3 requests at a time (per Upnp spec, sec 1.1.2)
// Yes, however it works perfectly well with just 1 request.
for (var i = 0; i < 2; i++)
{
if (cancelationToken.IsCancellationRequested)
{
return;
}
client.Send(data, data.Length, searchEndpoint);
}
}
}
public void Map(IPAddress gatewayAddress)
{
//Get the httpu request payload
byte[] data = DiscoverDeviceMessage.EncodeUnicast(gatewayAddress);
Client.Send(data, data.Length, new IPEndPoint(gatewayAddress, 1900));
new Thread(Receive).Start();
}
void Search(UdpClient client)
{
nextSearch = DateTime.Now.AddSeconds(SearchPeriod);
byte[] data = DiscoverDeviceMessage.EncodeSSDP();
// UDP is unreliable, so send 3 requests at a time (per Upnp spec, sec 1.1.2)
for (int i = 0; i < 3; i++)
{
client.Send(data, data.Length, searchEndpoint);
}
}