Which ICE candidate was accepted? (or, are we being relayed?)

[Rob Agar]

Hi all

Is there a way for a client (javascript or native C++) to discover which ICE candidate was finally accepted to open a connection?

Or more directly, can a client tell if the connection is being relayed through a TURN server?

[Philipp Hancke]

through the getStats API.

Look for a report of type googCandidatePair whose .stat('googActiveConnection') equals 'true' (string value, not boolean

Then look at .stat('googLocalCandidateType') and .stat('remoteCandidateType') which may be of equal to 'relay'.

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[Rob Agar]

Thanks, but is that though PeerConnection::GetStats()?  A google search seems to indicate that it's deprecated and due for removal (see here), but it's still in there AFAICS.

[André Susano Pinto]

The API is there in Javascript:

 - http://dev.w3.org/2011/webrtc/editor/webrtc.html#dom-peerconnection-getstats

If you read that CL, you will see that it simply removed the old method:

 virtual bool GetStats(StatsObserver* observer, webrtc::MediaStreamTrackInterface* track);

Since it was not used by chromium, but it left:

virtual bool GetStats(StatsObserver* observer, webrtc::MediaStreamTrackInterface* track, StatsOutputLevel level);

Which is used in chromium in:

 https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/media/rtc_peer_connection_handler.cc&q=native_peer_connection_-%3EGetStats&sq=package:chromium&l=720&dr=CSs

On Tue, Jun 10, 2014 at 9:35 AM, Rob Agar <ea.ro...@gmail.com> wrote:

Thanks, but is that though PeerConnection::GetStats()?  A google search seems to indicate that it's deprecated and due for removal (see here), but it's still in there AFAICS.

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[Rob Agar]

Ah OK, I understand now. Cheers André.