protected void StartReceive(UDPAsyncReceiveState <EndpointConfiguration> state)
{
EndPoint remoteEP = new IPEndPoint(state.Endpoint.AddressFamily == AddressFamily.InterNetwork ?
IPAddress.Any : IPAddress.IPv6Any, 0);
try
{
state.Socket.BeginReceiveFrom(state.Buffer, 0, state.Buffer.Length, SocketFlags.None,
ref remoteEP, OnSSDPReceive, state);
}
catch (Exception e) // SocketException and ObjectDisposedException
{
UPnPConfiguration.LOGGER.Info("SSDPServerController: UPnP SSDP subsystem unable to receive from IP address '{0}'", e,
NetworkHelper.IPAddrToString(state.Endpoint.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));
}
}
protected void StartUnicastReceive(UDPAsyncReceiveState<EndpointConfiguration> state)
{
try
{
Socket socket = state.Endpoint.SSDP_UDP_UnicastSocket;
EndPoint remoteEP = new IPEndPoint(state.Endpoint.AddressFamily == AddressFamily.InterNetwork ?
IPAddress.Any : IPAddress.IPv6Any, 0);
if (socket != null)
socket.BeginReceiveFrom(state.Buffer, 0, state.Buffer.Length, SocketFlags.None, ref remoteEP, OnSSDPUnicastReceive, state);
}
catch (Exception e) // SocketException and ObjectDisposedException
{
UPnPConfiguration.LOGGER.Error("SSDPClientController: Problem receiving unicast SSDP packets: '{0}'", e.Message);
}
}
protected void StartReceive(UDPAsyncReceiveState<EndpointConfiguration> state)
{
EndPoint remoteEP = new IPEndPoint(state.Endpoint.AddressFamily == AddressFamily.InterNetwork ?
IPAddress.Any : IPAddress.IPv6Any, 0);
try
{
state.Socket.BeginReceiveFrom(state.Buffer, 0, state.Buffer.Length, SocketFlags.None,
ref remoteEP, OnSSDPReceive, state);
}
catch (Exception e) // SocketException and ObjectDisposedException
{
UPnPConfiguration.LOGGER.Info("SSDPServerController: UPnP SSDP subsystem unable to receive from IP address '{0}'", e,
NetworkHelper.IPAddrToString(state.Endpoint.EndPointIPAddress));
}
}
