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Re: Feedback on the PeerConnection API

From: Stefan Hakansson LK <stefan.lk.hakansson@ericsson.com>
Date: Fri, 6 Jul 2012 17:56:24 +0200
Message-ID: <4FF70AA8.6060207@ericsson.com>
To: public-webrtc@w3.org
On 07/06/2012 05:01 PM, Silvia Pfeiffer wrote:
> Hi all,
> I've just subscribed to this mailing list and have had a cursory look
> on the mailing list archives, but don't think I've seen the topic
> discussed that I am curious about. So, apologies if it has been and do
> point me to it.
> While experimenting with a simple websocket server [1] to set up a
> PeerConnection [2] on a local network between two machines for a demo
> at a presentation [3], I came across the need to use a STUN or TURN
> server for IP address resolution. I did these experiments in Google
> Chrome 19.

As you probably are aware of, the PeerConnection API has changed 
significantly. It would be interesting to get feedback on the latest 
version ([4], available ar "webkitPeerConnection00" in newer versions of 
Chrome), if you are interested in trying it out.

> My understanding of the PeerConnection() API function is that the
> first argument is passing in a public STUN or TURN server so that the
> client can determine its public IP address. This then along with the
> locally discovered private IPs are placed in the SDP packet and sent
> across the communications channel eg google app server or node.js
> server or so. In my example setup, I could have done the demo
> completely within the private network, except I needed a public STUN
> server to resolve the IP address.
> I would therefore like to suggest that we should be able to pass
> "NONE" as a first argument to the PeerConnection() API function. This
> would say "don't use a STUN server, just put the local IPs in the
> packet".

I think you can pass an empty string to get this behavior (at least that 
is how we did it in our early implementation [5] if I recall correctly).


> My use case is for clients on a corporate network they may not have
> outbound access to a STUN nor do they need to since they all have
> direct IP reachability to each other.
> Also, I would like to suggest an improvement to the the current
> implementation: if both clients have IPs in the same subnet, they
> should try to connect to each other on the private IPs first before
> going for the public IPs. I'm thinking of situations where the NAT
> used on the network isn't smart enough for two clients on the same
> network to connect to their common public SNAT IP and then have the
> packets come back in.
> Best Regards,
> Silvia.
> [1] http://html5videoguide.net/presentations/WebDirCode2012/websocket/websocket-server.js
> [2] http://html5videoguide.net/presentations/WebDirCode2012/websocket/webrtc.html
> [3] http://blog.gingertech.net/2012/06/04/video-conferencing-in-html5-webrtc-via-web-sockets/
[4] http://dev.w3.org/2011/webrtc/editor/webrtc.html
[5] https://labs.ericsson.com/apis/web-real-time-communication/downloads
Received on Friday, 6 July 2012 15:56:56 UTC

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