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How much SDP do you need?

That was the question Max Ogden asked here.

It turns out that you don't need much SDP to establish a WebRTC connection. Basically all you really need to get a P2P connection running is an exchange of ice-ufrag,ice-pwd, the dtls fingerprint and candidate ip and port. Which, encoded in not very efficient ways, boils down to a little more than 100 characters.

Timing is critical however. Wait too long to set the answer at the offerer and things will fail. So this will not be usable for signaling via twitter, but something like CTCP WEBRTC over IRC would work.

See https://webrtchacks.com/the-minimum-viable-sdp/ for an in-depth explanation of what happens here.

LICENSE

See LICENSE.md.

The UI and basic structure is derived from the webrtc basic datachannel sample: https://github.com/webrtc/samples which is Copyright (c) 2014, The WebRTC project authors. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  • Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

  • Neither the name of Google nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

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