Am 16.11.21 um 20:31 schrieb Daniel Gultsch:
Hi,
I’m trying to implement ICE Restarts with XEP-0371. The XEP states
that ICE restarts can be detected by a changed ufrag and pwd
attributes in the transport-info.
However what I'm currently unclear about is how I can detect if the
incoming transport-info is a request to restart ICE on its own or a
response to an ICE restart we initiated.
Or to put it into WebRTC terminology how do I know if a transport-info
with changed ufrag/pwd is an Offer or an Answer.
oh this does a fancy variant which doesn't map 1:1 to WebRTC sdp.
Assume the following collision happening in parallel:
initiator: restart, transport-info
responder: restart, transport-info
Upon receiving the messages,
- the initiator consider the second message a response and maps it to an
answer.
- the responder will also consider it a response and map it to an answer.
Both will then update their respective ufrag/pwd and be happy.
It should actually work no matter what, leaving role conflict handling
to ICE. Oddly
https://jsfiddle.net/fippo/ytqmnsxh/5/
never changes the pair in Firefox but i'll go nag someone.
In general I would always initiate restarts from one side (e.g. the
intiator), not both. Why bother with glare and conflicts when it is
trivial to avoid...
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