One evening last week, I was nerd-sniped by a question Max Ogden asked:
That is quite an interesting question. I somewhat dislike using Session Description Protocol (SDP) in the signaling protocol anyway and prefer nice JSON objects for the API and ugly XML blobs on the wire to the ugly SDP blobs used by the WebRTC API.
The question is really about the minimum amount of information that needs to be exchanged for a WebRTC connection to succeed.
WebRTC uses ICE and DTLS to establish a secure connection between peers. This mandates two constraints:
- Both sides of the connection need to send stuff to each other
- You need at minimum to exchange ice-ufrag, ice-pwd, DTLS fingerprints and candidate information
