private void OnSSDPMulticastReceive(IAsyncResult ar)
{
lock (_cpData.SyncObj)
if (!_isActive)
{
return;
}
UDPAsyncReceiveState <EndpointConfiguration> state = (UDPAsyncReceiveState <EndpointConfiguration>)ar.AsyncState;
EndpointConfiguration config = state.Endpoint;
Socket socket = config.SSDP_UDP_MulticastReceiveSocket;
if (socket == null)
{
return;
}
try
{
EndPoint remoteEP = new IPEndPoint(state.Endpoint.AddressFamily == AddressFamily.InterNetwork ?
IPAddress.Any : IPAddress.IPv6Any, 0);
using (Stream stream = new MemoryStream(state.Buffer, 0, socket.EndReceiveFrom(ar, ref remoteEP)))
{
try
{
SimpleHTTPRequest header;
SimpleHTTPRequest.Parse(stream, out header);
HandleSSDPRequest(header, config, (IPEndPoint)remoteEP);
}
catch (Exception e)
{
UPnPConfiguration.LOGGER.Debug("SSDPClientController: Problem parsing incoming multicast UDP packet. Error message: '{0}'",
e.Message);
}
}
StartMulticastReceive(state);
}
catch (Exception) // SocketException, ObjectDisposedException
{
// Socket was closed - ignore this exception
UPnPConfiguration.LOGGER.Info("SSDPClientController: Stopping listening for multicast messages at IP endpoint '{0}'",
NetworkHelper.IPAddrToString(config.EndPointIPAddress));
}
}
private void OnSSDPReceive(IAsyncResult ar)
{
lock (_serverData.SyncObj)
if (!_serverData.IsActive)
{
return;
}
UDPAsyncReceiveState <EndpointConfiguration> state = (UDPAsyncReceiveState <EndpointConfiguration>)ar.AsyncState;
EndpointConfiguration config = state.Endpoint;
Socket socket = state.Socket;
try
{
EndPoint remoteEP = new IPEndPoint(
state.Endpoint.AddressFamily == AddressFamily.InterNetwork ?
IPAddress.Any : IPAddress.IPv6Any, 0);
// To retrieve the remote endpoint address, it is necessary that the SocketOptionName.PacketInformation is set to true on the socket
using (Stream stream = new MemoryStream(state.Buffer, 0, socket.EndReceiveFrom(ar, ref remoteEP)))
{
try
{
SimpleHTTPRequest header;
SimpleHTTPRequest.Parse(stream, out header);
HandleSSDPRequest(header, config, (IPEndPoint)remoteEP);
}
catch (Exception e)
{
UPnPConfiguration.LOGGER.Debug(
"SSDPServerController: Problem parsing incoming packet at IP endpoint '{0}'. Error message: '{1}'", e,
NetworkHelper.IPAddrToString(config.EndPointIPAddress), e.Message);
}
}
StartReceive(state);
}
catch (Exception) // SocketException, ObjectDisposedException
{
// Socket was closed - ignore this exception
UPnPConfiguration.LOGGER.Info("SSDPServerController: Stopping listening for multicast messages at IP endpoint '{0}'",
NetworkHelper.IPAddrToString(config.EndPointIPAddress));
}
}
private static void Parse(List <string> requestHeaders)
{
// Construct header using different line break styles
IEnumerable <string> delimiters = new[] { "\r\n", "\n" };
foreach (string delimiter in delimiters)
{
string fullRequest = string.Join(delimiter, requestHeaders.ToArray());
using (Stream stream = new MemoryStream(Encoding.UTF8.GetBytes(fullRequest)))
{
SimpleHTTPRequest result;
SimpleHTTPRequest.Parse(stream, out result);
for (int index = 1; index < requestHeaders.Count - 2; index++)
{
string requestHeader = requestHeaders[index];
int pos = requestHeader.IndexOf(':');
string header = requestHeader.Substring(0, pos).ToUpperInvariant();
string value = requestHeader.Substring(pos + 1).Trim();
Assert.AreEqual(value, result[header]);
}
}
}
}
