gst-rust can't connect to WebSocket

[zizhengtai]

I'm on macOS 10.14.5 and have installed all the GStreamer plugins via Homebrew. I cloned this repo, went into the sendrecv/gst-rust directory and compiled it successfully with cargo build. However, when I tried to do cargo run -- --peer-id=x where x is the ID I got from https://webrtc.nirbheek.in/, the program failed with the following output:

Connecting to server wss://webrtc.nirbheek.in:8443
Error: WebSocketError(IoError(Os { code: 61, kind: ConnectionRefused, message: "Connection refused" }))

The Python example works fine though, so I doubt it's a Firewall issue. Could you provide some insights on what might be the cause here? Let me know if you need more debug info.

[sdroege]

Can you check with wireshark what it actually tries to do there and attach the capture as pcap/pcapng file? Only the communication with webrtc.nirbheek.in / 176.58.110.251 / 2a01:7e00::f03c:91ff:feae:244 is of interest here.

[zizhengtai]

I attached two captures below. It seems there are some connection reset thing going on, but I'm really not familiar with this area so I'll leave it to you to take a look. Thanks!

gst-rust-pcapng.zip

[sdroege]

It's trying to connect to the IPv6 address and that gives "Connection refused". @nirbheek that's one for you :)

Why the ws crate does not try to connect to the IPv4 address afterwards is a good question though. I've forwarded the issue there, let's see what they say. Thanks for reporting.

[zizhengtai]

@sdroege, doesn't the example code use websocket instead of ws?

[sdroege]

🤦‍♂️ Yes. See websockets-rs/rust-websocket#237

[nirbheek]

The server now listens on ipv4 and ipv6. I've pushed a commit that makes this the default: da27e59