1250202 - One-way call with talky.io when one end was in a Hotel network

Status: RESOLVED INCOMPLETE

(Core :: WebRTC: Networking, defect, P1)

Description

[Maire Reavy [:mreavy]]

Adam and I tried to have a call while he was in a hotel.  We had one-way media - I could see and hear him perfectly; he could not hear or see me.

Comment 1

[Maire Reavy [:mreavy]]

P1 15 to at least analyze what we captured

Comment 2

[Maire Reavy [:mreavy]]

Attachment: aboutWebrtc_abr_oneway.html from mreavy's end

Comment 3

[Maire Reavy [:mreavy]]

Attachment: talky-io-failure.html - abr's end

Comment 4

[Maire Reavy [:mreavy]]

Attachment: call-fail.pcapng.gz UDP traffic from abr's end

Comment 5

[Byron Campen [:bwc]]

I'm not totally sure what is going on here (the pcap is from a call that wasn't in mreavy's about:webrtc), but it seems to be related to the handling of remote peer reflexives when using a relay. In experimenting with the test TURN server, I've found that Firefox is doing a very poor job of setting up TURN permissions; it is possible that no permission was set up for abr's peer reflexive, resulting in abr's packets being discarded.

Comment 6

[Maire Reavy [:mreavy]]

Byron -- I thought that the about:webrtc I uploaded had everything (the info from the earlier calls as well as the info from the last one where abr took the pcap).  Are you sure it's not there?  If you can do a quick sanity check, I'd appreciate it.

Comment 7

[Byron Campen [:bwc]]

I think there is an overlap between the two about:webrtc, but the pcap contains only packets from one call, which is not in your about:webrtc.

Comment 8

[Byron Campen [:bwc]]

Looking at the packet capture, I'm definitely seeing media arriving.

Comment 9

[Byron Campen [:bwc]]

abr's about:webrtc seems to indicate that media was arriving too. Was this a normal call that went one-way after a while?

Comment 10

[Adam Roach [:abr]]

(In reply to Byron Campen [:bwc] from comment #9)
> abr's about:webrtc seems to indicate that media was arriving too. Was this a
> normal call that went one-way after a while?

No, I never saw or heard Maire. She was able to see me from the very beginning of the call.

We did run several calls, and the situation was 100% reproducible. It's possible that the attached pcap is from a later call than the about:webrtc traces. The symptoms were always identical, however.

If you need to gather additional information, the hotel is actually located close to some of our friends, and I've confirmed their willingness to run through diagnostics as necessary (likely on Fridays only, though). Let me know if you'd like to put in touch.

Comment 11

[Byron Campen [:bwc]]

Hmm, on closer inspection, I have a pcap from abr's side, but no about:webrtc for that call, and about:webrtc from maire's side. The pcap has bidirectional media, it appears.

Comment 12

[Maire Reavy [:mreavy]]

Looking at abr's about:webrtc log (which was probably from the earlier call), there was incoming media data to Abr.  I think getting another capture with more logging turned on would be very interesting.  Tomorrow is Friday;  so if we want another capture, we should ask them today.