public async Task <List <TunerHostInfo> > DiscoverDevices(int discoveryDurationMs, CancellationToken cancellationToken)
{
lock (_modelCache)
{
_modelCache.Clear();
}
using var timedCancellationToken = new CancellationTokenSource(discoveryDurationMs);
using var linkedCancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(timedCancellationToken.Token, cancellationToken);
cancellationToken = linkedCancellationTokenSource.Token;
var list = new List <TunerHostInfo>();
// Create udp broadcast discovery message
byte[] discBytes = { 0, 2, 0, 12, 1, 4, 255, 255, 255, 255, 2, 4, 255, 255, 255, 255, 115, 204, 125, 143 };
using (var udpClient = _socketFactory.CreateUdpBroadcastSocket(0))
{
// Need a way to set the Receive timeout on the socket otherwise this might never timeout?
try
{
await udpClient.SendToAsync(discBytes, 0, discBytes.Length, new IPEndPoint(IPAddress.Parse("255.255.255.255"), 65001), cancellationToken).ConfigureAwait(false);
var receiveBuffer = new byte[8192];
while (!cancellationToken.IsCancellationRequested)
{
var response = await udpClient.ReceiveAsync(receiveBuffer, 0, receiveBuffer.Length, cancellationToken).ConfigureAwait(false);
var deviceIp = response.RemoteEndPoint.Address.ToString();
// check to make sure we have enough bytes received to be a valid message and make sure the 2nd byte is the discover reply byte
if (response.ReceivedBytes > 13 && response.Buffer[1] == 3)
{
var deviceAddress = "http://" + deviceIp;
var info = await TryGetTunerHostInfo(deviceAddress, cancellationToken).ConfigureAwait(false);
if (info != null)
{
list.Add(info);
}
}
}
}
catch (OperationCanceledException)
{
}
catch (Exception ex)
{
// Socket timeout indicates all messages have been received.
Logger.LogError(ex, "Error while sending discovery message");
}
}
return(list);
}
public async Task <List <TunerHostInfo> > DiscoverDevices(int discoveryDurationMs, CancellationToken cancellationToken)
{
cancellationToken = CancellationTokenSource.CreateLinkedTokenSource(new CancellationTokenSource(discoveryDurationMs).Token, cancellationToken).Token;
var list = new List <TunerHostInfo>();
// Create udp broadcast discovery message
byte[] discBytes = { 0, 2, 0, 12, 1, 4, 255, 255, 255, 255, 2, 4, 255, 255, 255, 255, 115, 204, 125, 143 };
using (var udpClient = _socketFactory.CreateUdpBroadcastSocket(0))
{
// Need a way to set the Receive timeout on the socket otherwise this might never timeout?
try
{
await udpClient.SendAsync(discBytes, discBytes.Length, new IpEndPointInfo(new IpAddressInfo("255.255.255.255", IpAddressFamily.InterNetwork), 65001), cancellationToken);
while (!cancellationToken.IsCancellationRequested)
{
var response = await udpClient.ReceiveAsync(cancellationToken).ConfigureAwait(false);
var deviceIp = response.RemoteEndPoint.IpAddress.Address;
// check to make sure we have enough bytes received to be a valid message and make sure the 2nd byte is the discover reply byte
if (response.ReceivedBytes > 13 && response.Buffer[1] == 3)
{
var deviceAddress = "http://" + deviceIp;
var info = await TryGetTunerHostInfo(deviceAddress, cancellationToken).ConfigureAwait(false);
if (info != null)
{
list.Add(info);
}
}
}
}
catch (OperationCanceledException)
{
}
catch
{
// Socket timeout indicates all messages have been received.
}
}
return(list);
}
