Crash when WHIP streaming with NordVPN "Split Tunnelling" enabled

[Meekel]

Crash when WHIP streaming with NordVPN "Split Tunnelling" enabled

[Fenrirthviti]

Tagging @Sean-Der to check this one. Seems the crash is in libdatachannel, not OBS.

[Sean-Der]

@Fenrirthviti I am fairly certain it is #10305

Anyone available to review?

[RytoEX]

From a skim of the git history/blame, this bug would also be present in OBS Studio 30.0.2. Is that true?

[Meekel]

Can confirm that the WHIP crash also happens in 30.0.2 when Split Tunnelling is enabled.

In testing on 30.0.2, the additional points are still true:

• It does not happen when Split Tunnelling isn't enabled, but still connected to the VPN
• With Split Tunnelling enabled, I can stream to YouTube via RTMP.

In testing where Split Tunnelling is enabled, OBS is NOT routed down the VPN.

[RytoEX]

@Fenrirthviti I am fairly certain it is #10305

Anyone available to review?

Worth noting that even if we merge that PR, streaming WHIP as configured by OP here will still not work. The only difference will be that OBS will emit an error instead of crashing.

[Sean-Der]

I am happy to help fix that! I would really like to fix things crashing though, makes it a lot easier for me to debug.

My guess is that libdatachannel isn't gathering (listening) on the VPN interface.

[Meekel]

My guess is that libdatachannel isn't gathering (listening) on the VPN interface.

Only caveat to that is that it appears to work fine with the VPN connected and split tunnelling disabled.

Let me know if you want any further testing to help out. Happy to check Wireshark to confirm what traffic is actually go where on the interfaces.

[RytoEX]

The crash as reported here has been fixed by #10305. As the configuration not working is a separate matter, I am inclined to close this Issue. We can address the issue with split tunneling not working as a separate matter, if needed. @Fenrirthviti ?

[Meekel]

The crash as reported here has been fixed by #10305. As the configuration not working is a separate matter, I am inclined to close this Issue. We can address the issue with split tunneling not working as a separate matter, if needed. @Fenrirthviti ?

I just downloaded the artifacts from #10305 and the crash still occurs

https://obsproject.com/logs/OZErOj2W4JwZx5p6

[RytoEX]

Looks like this crash is happening in Setup() rather than in Connect(), which #10305 addressed.

Does this crash happen with any WHIP ingest, preferably one that is publicly available and easy to test against?

[Meekel]

Looks like this crash is happening in Setup() rather than in Connect(), which #10305 addressed.

Does this crash happen with any WHIP ingest, preferably one that is publicly available and easy to test against?

Yes, I tested with https://b.siobud.com/api/whip at https://b.siobud.com/