[BUG]: It is not possible to make connection between different (public) networks

[emrahtoy]

Package version

3.1.0-exp.6

Environment

* OS: Windows 10 and Windows 11, Linux Ubuntu 22.04 Docker env.
* Unity version: 2021.3 and 2022.3 all LTS versions
* Graphics API: SRP, URP, HDRP
* Browser: Chrome, Firefox, Edge, Safari ( all latest )

Steps To Reproduce

1. Open bidirectional examples on the web and unity with different networks ( ask your friend for help )
2. Try to make a connection.

Current Behavior

It will look like there is a connection at least half of it but it will not detect the encoders and will not show up any data as the stream does not start. And disconnects in 60 seconds at max. If you try in the local network ( both web and unity apps ) it will connect yet get disconnected at an unmeasured time.

Expected Behavior

It should connect and stay connected as long as the connection is closed by one of the peers.

Anything else?

I have tried 3 different Turn server solutions with various configurations, with and without authentication.
All tests passed on ICE serves when I tested trickle ( except chrome with the known issues but it is considered passed )
I tried Coturn and Eturnal servers. Then I decided to try free and paid 3rd party servers ( metered.ca ). All passed the trickle and peer-to-peer tests.

I believe there is a race condition between negotiation and state changes. I couldn't see any rollback scenario so cable tangling may be the problem.

[karasusan]

OK, let me check the issue on my enviroment.

[karasusan]

memo: URS-436

[emrahtoy]

@karasusan is there any update? Could anyone able to reproduce the issue?

[karasusan]

@emrahtoy
I am checking the issue in this week.
I will share update if I can reproduce it.

[streunerlein]

+1, we are fighting with this for weeks. It is pretty sure a negotiation problem. Would be great to have that resolved because somehow render streaming in the same network is ~ nice ~ but the point of WebRTC is kind of to cross networks.

[cr-zhichen]

Hello, I also encountered the same issue. I have used a variety of different Turn servers and tested on Chrome, Firefox, Edge, and Safari. The Unity version I am using is 2021.3 LTS, and the testing environment is Windows 11. Similarly, I am facing challenges in achieving normal data transmission over the internet.

[karasusan]

Hi, I fixed this issue #923.
Please try that.

[karasusan]

#923 is merged.

@emrahtoy
Have you solved your issue?

[emrahtoy]

@karasusan we have moved to web side solutions which is why I couldn't have tested it yet. I will inform you as soon as I test and get the results.

[cr-zhichen]

Thank you very much for quickly fixing this issue. I have already made some deep modifications on the basis of Exp5. Once my modifications are stable, I will migrate to the new version for testing. If testing begins and results are available, I will inform you promptly.