RTCIceTransport 'failed' state

[robin-raymond]

Spec does not have an RTCIceTransport state of failed which exists both in the ICE RFC and trickle ice. We do have a disconnected state.

[robin-raymond]

disconnected

The RTCIceTransport has received at least one local and remote candidate, and a local and remote RTCIceCandidateComplete dictionary was not added as the last candidate but all appropriate candidate pairs thus far have been tested and failed (or prior obtained consent was removed). Other other candidate pairs may become available for testing as new candidates are trickled thus the transport is not failed yet.

failed

A local and remote RTCIceCandidateComplete dictionary was added as the last candidate to the RTCIceTransport and all appropriate candidate pairs have been tested and failed.

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FYI - We could use merge checking and disconnected if we don't need distinction when it's still in the checking process vs all checks possible have completed thus far and failed...

[aboba]

Here is a potential new state diagram:

[aboba]

Here is a revision to the state diagram. Since it is possible to call iceTransport.start() again with a new IceGatherer argument, transitions to "New" are possible from any state other than "closed".