relay candidates only when iceTransportPolicy == 'relay'

[Alexander Abagian]

Hi,

I faced very strange behaviour of Chrome ICE engine. When iceTransportPolicy is not 'relay', only 'host' candidates are available. No one binding request to TURN server is seen.

But if iceTransportPolicy == 'relay', then relay candidates arrive immediately. Would be glad to see any suggestions.

[Philipp Hancke]

libwebrtc stops gathering relay candidates if it manages to find a writable candidate pair which may explain what you're seeing.

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[Alexander Abagian]

Thanks. Under "writable candidate pair" you mean a pair including local candidate that has received BInding Success Response from remote ? 

And can I force generating relay (and srflx - they missed too) candidates in such cases without ICE restart with 'relay' on ?

четверг, 17 ноября 2022 г. в 10:20:13 UTC+3, philipp...@googlemail.com:

[Philipp Hancke]

Am Do., 17. Nov. 2022 um 23:08 Uhr schrieb Alexander Abagian <aaba...@gmail.com>:

Thanks. Under "writable candidate pair" you mean a pair including local candidate that has received BInding Success Response from remote ? 

yes.

 

And can I force generating relay (and srflx - they missed too) candidates in such cases without ICE restart with 'relay' on ?

No. IMO that is a pretty bad way to implement ICE since you can't know if TURN would have worked as fallback but...

четверг, 17 ноября 2022 г. в 10:20:13 UTC+3, philipp...@googlemail.com:

libwebrtc stops gathering relay candidates if it manages to find a writable candidate pair which may explain what you're seeing.

Am Do., 17. Nov. 2022 um 03:04 Uhr schrieb Alexander Abagian <aaba...@gmail.com>:

Hi,

I faced very strange behaviour of Chrome ICE engine. When iceTransportPolicy is not 'relay', only 'host' candidates are available. No one binding request to TURN server is seen.

But if iceTransportPolicy == 'relay', then relay candidates arrive immediately. Would be glad to see any suggestions.

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