RTCPeerConnection closure reason

[lostmsu]

How do I distinguish between connection closing due to remote party disconnecting gracefully vs connection dropping unexpectedly?

[sipsorcery]

AFAIK there's no standard way.

In practice I think there's likely to be some kind of DTLS alert message for a user intiated disconnect to indicate the session is being deliberately closed.

Something like:

[22:52:52 DBG] RtpIceChannel for [::]:55044 closed.
[22:52:52 DBG] DTLS server raised close notify: warning(1), close_notify(0).
[22:52:52 DBG] DTLS server raised close notify: warning(1), close_notify(0).

For dropped connections there may be no DTLS packets received and instead the connection will only close when the ICE checks timeout.