/// <summary>
/// Implements support for the UPnP protocol, as described in:
/// http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.0.pdf
/// </summary>
public UPnPClient()
{
UdpClient Outgoing;
UdpClient Incoming;
foreach (NetworkInterface Interface in NetworkInterface.GetAllNetworkInterfaces())
{
if (Interface.OperationalStatus != OperationalStatus.Up)
{
continue;
}
IPInterfaceProperties Properties = Interface.GetIPProperties();
IPAddress MulticastAddress;
foreach (UnicastIPAddressInformation UnicastAddress in Properties.UnicastAddresses)
{
if (UnicastAddress.Address.AddressFamily == AddressFamily.InterNetwork && Socket.OSSupportsIPv4)
{
try
{
Outgoing = new UdpClient(AddressFamily.InterNetwork);
MulticastAddress = IPAddress.Parse("239.255.255.250");
Outgoing.DontFragment = true;
Outgoing.MulticastLoopback = false;
}
catch (Exception)
{
continue;
}
}
else if (UnicastAddress.Address.AddressFamily == AddressFamily.InterNetworkV6 && Socket.OSSupportsIPv6)
{
try
{
Outgoing = new UdpClient(AddressFamily.InterNetworkV6);
Outgoing.MulticastLoopback = false;
MulticastAddress = IPAddress.Parse("[FF02::C]");
}
catch (Exception)
{
continue;
}
}
else
{
continue;
}
Outgoing.EnableBroadcast = true;
Outgoing.MulticastLoopback = false;
Outgoing.Ttl = 30;
Outgoing.Client.Bind(new IPEndPoint(UnicastAddress.Address, 0));
Outgoing.JoinMulticastGroup(MulticastAddress);
IPEndPoint EP = new IPEndPoint(MulticastAddress, ssdpPort);
this.ssdpOutgoing.AddLast(new KeyValuePair <UdpClient, IPEndPoint>(Outgoing, EP));
Outgoing.BeginReceive(this.EndReceiveOutgoing, Outgoing);
try
{
Incoming = new UdpClient(Outgoing.Client.AddressFamily);
Incoming.ExclusiveAddressUse = false;
Incoming.Client.Bind(new IPEndPoint(UnicastAddress.Address, ssdpPort));
Incoming.BeginReceive(this.EndReceiveIncoming, Incoming);
this.ssdpIncoming.AddLast(Incoming);
}
catch (Exception)
{
Incoming = null;
}
try
{
Incoming = new UdpClient(ssdpPort, Outgoing.Client.AddressFamily);
Incoming.MulticastLoopback = false;
Incoming.JoinMulticastGroup(MulticastAddress);
Incoming.BeginReceive(this.EndReceiveIncoming, Incoming);
this.ssdpIncoming.AddLast(Incoming);
}
catch (Exception)
{
Incoming = null;
}
}
}
}
