internal async Task<bool> IsDeviceConnectedOperationAsync(Device device)
{
if (device.RefreshRequired())
await GetDeviceStatusAsync(device);
return device.Connected();
}
internal async Task GetDeviceStatusActionAsync(Device device)
{
if (ConnectionInProgress) return;
var connected = false;
var hostName = device.Hostname();
ConnectionAttemptInformation = "";
ConnectionInProgress = true;
var portNumber = device.Port().ToString();
try
{
using (var tcpClient = new StreamSocket())
{
await tcpClient.ConnectAsync(new HostName(hostName), portNumber, SocketProtectionLevel.PlainSocket);
var remoteIp = tcpClient.Information.RemoteAddress.DisplayName;
ConnectionAttemptInformation = $"Success, remote device: {device.Name()} was contacted at IP address {remoteIp} on port {portNumber}";
connected = true;
tcpClient.Dispose();
}
}
catch (Exception ex)
{
switch (ex.HResult)
{
case -2147014835:
//Actively refused connection, so is connected to the network
ConnectionAttemptInformation = $"Success, remote device activelty refused the connection on port {portNumber}.";
connected = true;
break;
case -2147013895:
ConnectionAttemptInformation = "Error: No such host is known";
break;
case -2147014836:
ConnectionAttemptInformation = "Error: Timeout when connecting (check hostname and port)";
break;
default:
ConnectionAttemptInformation = "Error: Exception returned from network stack: " + ex.Message;
break;
}
}
finally
{
ConnectionInProgress = false;
}
//Debug.WriteLine(ConnectionAttemptInformation);
device.UpdateStatus(connected, ConnectionAttemptInformation);
}
public IAsyncAction GetDeviceStatusAsync(Device device)
{
return GetDeviceStatusActionAsync(device).AsAsyncAction();
}
public IAsyncOperation<bool> IsDeviceConnectedAsync(Device device)
{
return IsDeviceConnectedOperationAsync(device).AsAsyncOperation();
}
