Inability to find all UPnP devices over the network

SNIKO / UPnPLite

A UPnP/DLNA stack for WinRT / Windows Phone.

MIT License

16 stars 8 forks source link

Inability to find all UPnP devices over the network #1

Open SNIKO opened 11 years ago

SNIKO commented 11 years ago

Due some reason, a lot of UPD packets get lost. UPnP devices do send UDP messages about their status, but only small part of them reaches the control point. So, the control point cannot precisely determine current situation in the network. It looks like these packets are somehow blocked in winrt. I don't know, maybe it is some security limitation, bug in winrt's DatagramSocket or something else.

RagBuster commented 9 years ago

Not sure if this is related but I was receiving an error when searching for UPNP devices in a Windows 8.1 Store app. As I have experienced this before I needed to make a change to the search call.

I added: Windows.Networking.Connectivity.ConnectionProfile connectionProfile = Windows.Networking.Connectivity.NetworkInformation.GetInternetConnectionProfile();

and changed the line: await searchSocket.BindEndpointAsync(null, "");

to await searchSocket.BindServiceNameAsync("", connectionProfile.NetworkAdapter);

This seems to work better without errors.

SNIKO commented 9 years ago

As soon as I've converted the library to WP 8.1, I've got the same problem in WP. It looks like they broke the multicast broadcast. Looking into it. Probably will have to back to 8.0.

SNIKO commented 9 years ago

Well, it was a problem in my WP emulator. Once I restarted my computer, everything has back to normal. No problems with broadcasting multicast messages to 1900 port in WP.