public void SendMessage(string NT, string USN, DvDevice rootDevice)
{
SimpleHTTPResponse response = new SimpleHTTPResponse(HTTPResponseCode.Ok);
response.SetHeader("CACHE-CONTROL", "max-age = " + _serverData.AdvertisementExpirationTime);
response.SetHeader("DATE", DateTime.Now.ToUniversalTime().ToString("R"));
response.SetHeader("EXT", string.Empty);
response.SetHeader("SERVER", UPnPConfiguration.UPnPMachineInfoHeader);
response.SetHeader("ST", NT);
response.SetHeader("USN", USN);
response.SetHeader("BOOTID.UPNP.ORG", _serverData.BootId.ToString());
response.SetHeader("CONFIGID.UPNP.ORG", _localEndpointConfiguration.ConfigId.ToString());
if (_localEndpointConfiguration.AddressFamily == AddressFamily.InterNetworkV6)
{
response.SetHeader("OPT", "\"http://schemas.upnp.org/upnp/1/0/\"; ns=01");
response.SetHeader("01-NLS", _serverData.BootId.ToString());
}
if (_localEndpointConfiguration.SSDPUsesSpecialSearchPort)
{
response.SetHeader("SEARCHPORT.UPNP.ORG", _localEndpointConfiguration.SSDPSearchPort.ToString());
}
response.SetHeader("LOCATION", _localEndpointConfiguration.GetRootDeviceDescriptionURL(rootDevice));
byte[] bytes = response.Encode();
Socket socket = _localEndpointConfiguration.SSDP_UDP_UnicastSocket;
if (socket != null)
{
NetworkHelper.SendData(socket, _receiverEndPoint, bytes, 1);
}
}
private void OnSSDPUnicastReceive(IAsyncResult ar)
{
lock (_cpData.SyncObj)
if (!_isActive)
{
return;
}
UDPAsyncReceiveState <EndpointConfiguration> state = (UDPAsyncReceiveState <EndpointConfiguration>)ar.AsyncState;
EndpointConfiguration config = state.Endpoint;
Socket socket = config.SSDP_UDP_UnicastSocket;
if (socket == null)
{
return;
}
try
{
EndPoint remoteEP = new IPEndPoint(state.Endpoint.AddressFamily == AddressFamily.InterNetwork ?
IPAddress.Any : IPAddress.IPv6Any, 0);
Stream stream = new MemoryStream(state.Buffer, 0, socket.EndReceiveFrom(ar, ref remoteEP));
try
{
SimpleHTTPResponse header;
SimpleHTTPResponse.Parse(stream, out header);
HandleSSDPResponse(header, config, (IPEndPoint)remoteEP);
}
catch (Exception e)
{
UPnPConfiguration.LOGGER.Debug("SSDPClientController: Problem parsing incoming unicast UDP packet. Error message: '{0}'", e.Message);
}
StartUnicastReceive(state);
}
catch (Exception) // SocketException, ObjectDisposedException
{
// Socket was closed - ignore this exception
UPnPConfiguration.LOGGER.Info("SSDPClientController: Stopping listening for unicast messages at address '{0}'",
NetworkHelper.IPAddrToString(config.EndPointIPAddress));
}
}
protected void HandleSSDPResponse(SimpleHTTPResponse header, EndpointConfiguration config, IPEndPoint remoteEndPoint)
{
HTTPVersion httpVersion;
if (!HTTPVersion.TryParse(header.HttpVersion, out httpVersion))
{
// Invalid response
return;
}
string cacheControl = header["CACHE-CONTROL"];
string date = header["DATE"];
// EXT is not used
//string ext = header["EXT"];
string location = header["LOCATION"];
string server = header["SERVER"];
// ST is not used
//string st = header["ST"];
string usn = header["USN"];
string bi = header["BOOTID.UPNP.ORG"];
string ci = header["CONFIGID.UPNP.ORG"];
string sp = header["SEARCHPORT.UPNP.ORG"];
HandleNotifyPacket(config, remoteEndPoint, httpVersion, date, cacheControl, location, server, "ssdp:alive", usn, bi, ci, sp);
}
