public static void Handle(IPAddress localAddress, UpnpDeviceInfo deviceInfo, IPEndPoint endpoint, NatProtocol protocol)
{
switch (protocol)
{
case NatProtocol.Upnp:
UpnpSearcher.Instance.Handle(localAddress, deviceInfo, endpoint);
break;
default:
throw new ArgumentException("Unexpected protocol: " + protocol);
}
}
public void Handle(IPAddress localAddress, UpnpDeviceInfo deviceInfo, IPEndPoint endpoint)
{
// No matter what, this method should never throw an exception. If something goes wrong
// we should still be in a position to handle the next reply correctly.
try
{
/* For UPnP Port Mapping we need ot find either WANPPPConnection or WANIPConnection.
Any other device type is no good to us for this purpose. See the IGP overview paper
page 5 for an overview of device types and their hierarchy.
http://upnp.org/specs/gw/UPnP-gw-InternetGatewayDevice-v1-Device.pdf */
/* TODO: Currently we are assuming version 1 of the protocol. We should figure out which
version it is and apply the correct URN. */
/* Some routers don't correctly implement the version ID on the URN, so we only search for the type
prefix. */
// We have an internet gateway device now
UpnpNatDevice d = new UpnpNatDevice(localAddress, deviceInfo, endpoint, string.Empty);
if (devices.Contains(d))
{
// We already have found this device, so we just refresh it to let people know it's
// Still alive. If a device doesn't respond to a search, we dump it.
devices[devices.IndexOf(d)].LastSeen = DateTime.Now;
}
else
{
// If we send 3 requests at a time, ensure we only fetch the services list once
// even if three responses are received
if (lastFetched.ContainsKey(endpoint.Address))
{
DateTime last = lastFetched[endpoint.Address];
if ((DateTime.Now - last) < TimeSpan.FromSeconds(20))
return;
}
lastFetched[endpoint.Address] = DateTime.Now;
// Once we've parsed the information we need, we tell the device to retrieve it's service list
// Once we successfully receive the service list, the callback provided will be invoked.
NatUtility.Log("Fetching service list: {0}", d.HostEndPoint);
d.GetServicesList(DeviceSetupComplete);
}
}
catch (Exception ex)
{
NatUtility.Log("Unhandled exception when trying to decode a device's response Send me the following data: ");
NatUtility.Log("ErrorMessage:");
NatUtility.Log(ex.Message);
}
}