webrtcbin ice-state-connection doesn't change to 'disconnected'

[Matthew Waters]

The state properties are currently best effort and do not always reflect
the actual state due to issues with the dependant libraries.

e.g
- libnice currently doesn't signal disconnection properly (even if the
enum value is in its API)
- the GStreamer dtls have no state field which means the algorithm that
computes 'connection-state' (from the webrtc spec) always results in 'new'
- the ICE transports associated with the data-channel is used when
computing any state which is an oversight.

In short, there are issues with the states and patches are welcome.


On 26/10/19 12:50 am, givip wrote:
> I have a pipeline with only 'Data Channel',
> I can successfully establish connection with remote peer and even exchange
> data (string).
>
> When I close connection on the other side, GStreamer hasn't any reaction.
>
> I tried to poll any state propertires in webrtcbin (every 5 seconds):
>
> gint state;
> g_object_get(webrtcbin, "connection-state", &state, NULL);
> GST_DEBUG("Connection State webrtcbin: %d", state);
>
> gint sig_state;
> g_object_get(webrtcbin, "signaling-state", &sig_state, NULL);
> GST_DEBUG("Signalling State webrtcbin: %d", sig_state);
>
> gint ice_state;
> g_object_get(webrtcbin, "ice-connection-state", &ice_state, NULL);
> GST_DEBUG("ICE State webrtcbin: %d", ice_state);
>
> gint ice_gath_state;
> g_object_get(webrtcbin, "ice-gathering-state", &ice_gath_state, NULL);
> GST_DEBUG("ICE Gathering State webrtcbin: %d", ice_gath_state);
>
>
> But all state remain 0 always.
>
>
> A little bit different situation with 'Media channel':
>
> 'connection-state' and 'signalling-state' are the same 0;
>
> 'ice-connection-state', 'ice-gathering-state' changes to 2 when CONNECTED
> and remains in this state even remote peer had been disconnected.
>
>
>
>
> --
> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
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