private async Task SendFromSocket(ISocket socket, byte[] messageData, IpEndPointInfo destination, CancellationToken cancellationToken)
{
try
{
await socket.SendToAsync(messageData, 0, messageData.Length, destination, cancellationToken).ConfigureAwait(false);
}
catch (ObjectDisposedException)
{
}
catch (OperationCanceledException)
{
}
catch (Exception ex)
{
_logger.LogError(ex, "Error sending socket message from {0} to {1}", socket.LocalIPAddress.ToString(), destination.ToString());
}
}
private void ProcessSearchRequest(string mx, string searchTarget, IpEndPointInfo remoteEndPoint, IpAddressInfo receivedOnlocalIpAddress)
{
if (String.IsNullOrEmpty(searchTarget))
{
WriteTrace(String.Format("Invalid search request received From {0}, Target is null/empty.", remoteEndPoint.ToString()));
return;
}
//WriteTrace(String.Format("Search Request Received From {0}, Target = {1}", remoteEndPoint.ToString(), searchTarget));
if (IsDuplicateSearchRequest(searchTarget, remoteEndPoint))
{
//WriteTrace("Search Request is Duplicate, ignoring.");
return;
}
//Wait on random interval up to MX, as per SSDP spec.
//Also, as per UPnP 1.1/SSDP spec ignore missing/bank MX header. If over 120, assume random value between 0 and 120.
//Using 16 as minimum as that's often the minimum system clock frequency anyway.
int maxWaitInterval = 0;
if (String.IsNullOrEmpty(mx))
{
//Windows Explorer is poorly behaved and doesn't supply an MX header value.
//if (this.SupportPnpRootDevice)
mx = "1";
//else
//return;
}
if (!Int32.TryParse(mx, out maxWaitInterval) || maxWaitInterval <= 0)
{
return;
}
if (maxWaitInterval > 120)
{
maxWaitInterval = _Random.Next(0, 120);
}
//Do not block synchronously as that may tie up a threadpool thread for several seconds.
Task.Delay(_Random.Next(16, (maxWaitInterval * 1000))).ContinueWith((parentTask) =>
{
//Copying devices to local array here to avoid threading issues/enumerator exceptions.
IEnumerable <SsdpDevice> devices = null;
lock (_Devices)
{
if (String.Compare(SsdpConstants.SsdpDiscoverAllSTHeader, searchTarget, StringComparison.OrdinalIgnoreCase) == 0)
{
devices = GetAllDevicesAsFlatEnumerable().ToArray();
}
else if (String.Compare(SsdpConstants.UpnpDeviceTypeRootDevice, searchTarget, StringComparison.OrdinalIgnoreCase) == 0 || (this.SupportPnpRootDevice && String.Compare(SsdpConstants.PnpDeviceTypeRootDevice, searchTarget, StringComparison.OrdinalIgnoreCase) == 0))
{
devices = _Devices.ToArray();
}
else if (searchTarget.Trim().StartsWith("uuid:", StringComparison.OrdinalIgnoreCase))
{
devices = (from device in GetAllDevicesAsFlatEnumerable() where String.Compare(device.Uuid, searchTarget.Substring(5), StringComparison.OrdinalIgnoreCase) == 0 select device).ToArray();
}
else if (searchTarget.StartsWith("urn:", StringComparison.OrdinalIgnoreCase))
{
devices = (from device in GetAllDevicesAsFlatEnumerable() where String.Compare(device.FullDeviceType, searchTarget, StringComparison.OrdinalIgnoreCase) == 0 select device).ToArray();
}
}
if (devices != null)
{
var deviceList = devices.ToList();
//WriteTrace(String.Format("Sending {0} search responses", deviceList.Count));
foreach (var device in deviceList)
{
SendDeviceSearchResponses(device, remoteEndPoint, receivedOnlocalIpAddress);
}
}
else
{
//WriteTrace(String.Format("Sending 0 search responses."));
}
});
}
private async Task SendFromSocket(IUdpSocket socket, byte[] messageData, IpEndPointInfo destination)
{
try
{
await socket.SendAsync(messageData, messageData.Length, destination).ConfigureAwait(false);
}
catch (ObjectDisposedException)
{
}
catch (Exception ex)
{
_logger.ErrorException("Error sending socket message from {0} to {1}", ex, socket.LocalIPAddress.ToString(), destination.ToString());
}
}